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Comments 17701 to 17750:

17701. NorrisM at 13:42 PM on 1 October 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #39
       

       In the midst of all this tragedy, could you not wait?

       Moderator Response:

       [JH] Sloganeering snipped.

17702. nigelj at 07:24 AM on 1 October 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       Norris M @41

       "There does not seem to even be agreement amongst climate scientists on what actual global average surface air temperature increases have taken place since "pre-industrial times" (ie 1800) or since 1900."

       This is true, but what is your real point here? The disagreement between the main temperature datasets is quite small. You will probably never get perfect agreement because histoorical data collection is not inherently perfect. We certainly have a good idea of global temperatures plus or minus a small discrepency. This is as good as it gets (like the movie) and is  enough for intelligent understanding of the general situation we are in. You seldom get 100% agreement and certainty in anything in any measurements of any past historical phenomena. That doesnt matter as long as trends clearly stand out.This is enough for me to see theres clearly been approx "x" quantity of temperature increase.

       Are you saying you want 100% certainty and agreement before you can take climate change seriously?

       A simple question Norris. Do you really have 100% certainty in other areas of your personal and business life? Think about it hard there are mostly always some doubts and unknowns even if we sometimes say we are "sure".

       "I read that temperature rise had now fallen back to the pre-2015-2016 El Nino level"

       Again so what is your point? It's to be expected that temperatures fall after an el nino but its highly probable they will rise again after a few years. Its really longer term trends that count, and approx. temperature increases over a time frame, not exact temperatues 1.65382 degrees over x time frame.

17703. nigelj at 07:05 AM on 1 October 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       MA Rodger @40

       "She will raises issues but almost always fails to set out clearly what she concludes from such issues."

       This has also been my exact same impression of various things she has said. Its very frustrating and it creates enormous doubts, exactly what climate denialists deliberately set out to do, so she plays right into their hands, either deliberately or unwittingly.

       I think going back to your previous post all the trouble started when she was heavily criticised over her research paper on weather systems. It appears she lost confidence in herself, or something, and started to side with the sceptics and perhaps their was some genuine desire to respect their point of view, or at least listen to it, at least at first. But its a slippery slope, and she is a full scale denialist now whether she realises it or not, and  admits it or not. Her rhetoric speaks for itself. It reminds me of the theme expressed in the book Animal Farm by Orwell.

       "Her evidence on the relevance of the 'hiatus' never concludes. Rather it rambles on about "The growing discrepancy between climate model predictions and the observations".

       Exactly. Now at that point in time of her testimony it was fair to say temperatures were falling towards the lower  boundary of error bars, but they were not outside these and as far as I'm aware its always been predicted you could have approx. 10 year periods of slow temperature growth, or even falling temperatures due to a variety of natural cycles. Curry must know that so why didn't she say so in her testimony? If she thinks natural causes could not have been responsible for the "pause", then why does she not say so? By saying nothing, she is unbalanced and not fulsome in her testimony, and can only be seen as a full on climate denialist whether she intends this or not.

       "and for good measure the graph stops short of the latest 2015 warmth),'

       Again Curry must have know this, and it puts her testimony into the frankly misleading category. This is not good enough.

       "we need to look at the satellite data. I mean, this is the best data that we have and is global")". 

       I'm just gobsmacked by this, as again she must know the limitations of this data. Its certainly not the best data. Again it puts her fully in the Watts Up denialist camp, and is the exact sort of rhetoric they use. She is copying and pasting what they say.

       You dont need to have a degree in atmospheric physics to know that none of the data sets are 100% perfect, and the sane and sensible thing to do would be to take an average of them all. Curry is qualified and obviously very intelligent, so something has become unhinged somewhere, to be saying the things she is saying.

       I have no problem with scepticism as its natural, and I dont take things at face value, but I think we have a duty to be balanced and tell things in full context, and explain a full conclusion, and Curry does neither of these things.

       "Yes, I do believe that we have overall been warming, but we have been warming for 200, maybe even 400 years, OK? And that is not caused by humans."

       This just feeds right into the denialist machine. She has been suckered in. And clearly theres a big acceleration in warming form 1920 so why doesn't she see the significance of that?

       "the land datasets are sort of starting to agree"

       She is thinking aloud. You do this in private with colleagues not when testifying to politicians! She doesnt know when to shut up.

17704. nigelj at 06:04 AM on 1 October 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #39
       

       This disaster is very grim for Peurto Rico, and possibly a sign of worse things to come as climate changes. If IPCC climate predictions prove correct and hurricanes become more intense and eventually more numerous, the impacts will be very significant. Some of the IPCC projections for increased hurricane intensity are quite large, depending somewhat on geographical location. Increasing quantities of gdp will go into hurricane repairs as opposed to increasing basic quality of life.

       Some vulnerable areas will possibly never fully recover before the next big one hits. It took 10 years to clean up and repair things after Hurricane Katrina hit New Orleans, and the cost was 100 billion dollars. No wonder small island nations already stay poor.

       This sort of scenario can only become more common as climate continues to change because the type of change has mostly negative consequences for weather systems. Theres very little upside when more heat energy and moisture goes into weather systems.

       Economies are adapted over decades and centuries to stability of environment or at least known regular cyclical problems of roughly equal intensity. This stability has been useful in improvement in human economies, and we have seen tremendous progess in many areas, despite the inevitable problems as well. Our modern economy since the end of the last ice age has never actually faced a period where weather gets progressively worse almost everywhere over decadal time frames, so its uncharted territory to fully quantify.

17705. Philippe Chantreau at 05:17 AM on 1 October 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       NorrisM says "I read that temperature rise had now fallen back to the pre-2015-2016 El Nino level"

       Why would that not be an entirely normal expectation? Said level was already above that of the mammoth 1998 El Nino, an extraordinary outlier, although it did not remain so for long at all. 

17706. NorrisM at 03:12 AM on 1 October 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       MA Rodger @ 40

       "She is strongly suggesting that the possible 0.2ºC warming over a recent 300-year period (1600-1900) somehow brings into serious doubt the IPCC's attribution of the 1.2ºC warming since 1900."

       There does not seem to even be agreement amongst climate scientists on what actual global average surface air temperature increases have taken place since "pre-industrial times" (ie 1800) or since 1900.

       My understanding from everything that I have had read up to now was that from 1900 to 2015, we had about a .8C rise with about .3C to .4C  being attributed to about 1940 and then from 1975 to 2015 about .4 to .5C.  I honestly cannot remember whether it was .3/.5C or .4C/.4C.  Then, owing to the hot 2015-2016 years attributable to the hottest El Nino on record, the temperature rise exceeded 1C.  This last statement is directly from the Millar et al paper recently published in Nature Geoscience (I actually bought a copy of it).

       But then the Millar et al paper begins its discussion by stating that "human induced warming reached an estimated 0.93C (+/-.13C) above mid-19th century conditions in 2015 and is currently increasing at .2C per decade" and cites an Otto et al paper in 2015 in support of this.

       The above statement by MA Rodger references the IPCC suggesting that there has been a 1.2C rise since 1900.  I assume this comes from the 2013 IPCC Assessment because I assume they do not make "statements" outside of their assessments.

       Added to this, somewhere else I read that temperature rise had now fallen back to the pre-2015-2016 El Nino level.  I think the comment referenced  .8C but I am not sure.  

       Can someone make sense of all these conflicting statements about actual warming?

17707. MA Rodger at 21:36 PM on 30 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       nigelJ @39,
       Note that within her spreading of doubt and denial about AGW, Curry is even happy to trash the temperature record. (This is perhaps odd as the temperature record is about the only thing she has to base her grand theory of there being a humongous natural climate wobble which has amplified the recent AGW over 1970-98 to create the present climate 'hysteria' with Wyatt's Unified Wave Theory being Judy's candidate for such an oscillation back in 2015.)

       Her stance in the temperature record is basically that 'there has been warming, but...' with the 'but' being followed by the buckets of doubt and denial. In many ways her comments about the temperature-record exemplifies her highly unscientific method. She will raises issues but almost always fails to set out clearly what she concludes from such issues. If she did, she would be slammed for promulgating serious denial with sky-high Monckton-ratings.

       Consider her testemony about the temperature record in front of this 2015 Senate Committee:-
       ♠ Her citing of the hockeystick graph as showing "overall warming may have occurred for the past 300–400 years. Humans contributed little if anything to this early global warming," rather misrepresents the hockeystick. She is strongly suggesting that the possible 0.2ºC warming over a recent 300-year period (1600-1900) somehow brings into serious doubt the IPCC's attribution of the 1.2ºC warming since 1900.
       ♠ Her evidence on the relevance of the 'hiatus' never concludes. Rather it rambles on about "The growing discrepancy between climate model predictions and the observations", the raging debates over the recent Karl et al (2015), the 'hiatus' "clearly revealed" by satellite data (helpfully plotted by denialist Roy Spencer so the graph shows the now-superceded RSSv3.3 and the then-yet-to-be-released UAHv6.0 and with the RSS data re-based and curiously shorn of some of its maxs&mins and for good measure the graph stops short of the latest 2015 warmth), scientific disagreement over discrepancies between TLT & SAT records (and note where she stands on that with her oral testimony "we need to look at the satellite data. I mean, this is the best data that we have and is global"), convoluted statistical probability of 2015 becoming warmest-year-on-record, discrepancies amongst temperature data sets, a five years requirement to be sure the 'hiatus' has actually ended. It rambles on but the relevance of the 'hiatus', the message  she is meant to be delivering, is never set out.
       ♠ Beyond her written testimony, Curry also expounds on SAT record adjustments, spreading yet more doubt:-

       "... And the adjustments, as you can see, are rather huge, OK?
       So should we—so, to me, the error bars should really be much bigger if they are making such a large adjustment. So we really don’t know too much about what is going on in terms of, you know, it is a great deal of uncertainty. Yes, I do believe that we have overall been warming, but we have been warming for 200, maybe even 400 years, OK? And that is not caused by humans."

       After the digression onto the pet "warming for even 400 years,OK" Curry returns to adjustments but specifically ocean adjustments stating "I mean, the land datasets are sort of starting to agree, but there is a great deal of controversy and uncertainty right now in the treatment of the ocean temperatures." Poor Judy has failed to note that Chariman Cruz was asking for comment on USCHN data adjustments and her comment relevant to that data solely comprises "the land datasets are sort of starting to agree" and thus that the adjustments Cruz is complaining about are perfectly appropriate. Yet that is certainly not the take-away message she provides.

       Curry gets away with talking this rubbish, even in written reports presented to a Senate Committe. She really should be taken to task for it.

17708. jgnfld at 20:24 PM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       More to the subject of federal/state political actions, Perry just announced nearly 4 billion in subsidies to a nuclear plant in Georgia. This is in addition to many more billions this plant has already gotten.

17709. Ari Jokimäki at 14:53 PM on 30 September 2017
       New research, September 18-24, 2017
       

       Thanks! I use a RSS feed reader where I have included new paper feeds of about 90 journals.

17710. Philippe Chantreau at 14:45 PM on 30 September 2017
       The Trump administration wants to bail out failed contrarian climate scientists
       

       I doubt that it will be of any interest. It's going to be another useless pseudo debate of the TV type in which the better show person comes across as more convincing, regardless of the substance they present. Not to mention the audience will likely be far from having the ability to sort through all the stuff flung around, a lot of it will inevitably be long debunked nonsense. The only reason the instigators of this BS are going through with it is because they are reasonably sure that it will give them an edge toward continuing business as usual. Well thought out, carefully reasoned thoughts do not lok and sound good on TV. 

       The only real debate that is worth paying attention to has been going for years, it is conducted by the people who really know what they're talking about and it happens in the scientific litterature. That's where it's at. There is no stupid colored team there, only experts trying to better understand the physical world.

17711. Eclectic at 13:13 PM on 30 September 2017
       The Trump administration wants to bail out failed contrarian climate scientists
       

       Yes, an interesting waste of taxpayers' money.

       Arranged by people who are hostile to the taxpayers' interests.

       Titanic . . . deck chairs . . . etc.

17712. citizenschallenge at 13:00 PM on 30 September 2017
       New research, September 18-24, 2017
       

       How do you keep up with it?  Thank you for the effort.

17713. GeoffThomas at 12:57 PM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       OOPS should have said GRAMS Swamp fox, there has now been huge success with feeding cows charcoal, 200 to 400 GRAMS/day, (mixed with their molasses) the charcoal helps the digestion, reduces infection and is turned into Biochar (actually enlivened biochar) by the cow, then pooped out and buried by Dung Beetles, leading to healthier cows with higher stocking rates, and rebuilding the impoverished soil, or vastly improving good soil - those farmers using that technique should get the dividend, twould perhaps pay for the charcoal, a dividend would be appropriate as farmers are traditionally conservative and hesitant to spend money

       Much land in Australia is very difficult to farm except by running animals on it, and as very little charcoal is lost by this process, the farmer would know exactly how much charcoal he has put into the soil through his cows.

       Threre are 28.5 Million cows in Australia, more than people, if they each get app 1/3rd of a kilo that is 9.5 million kilos per day, 3467.5 million Kgs per year, - in America there are 98.4 million, - between 1,3 and 1.5 Billion cows on the Earth, - do the sums, and charcoal/carbon is traditionally taken by humans for flatulence, - virtually removes methane farting from cows too.

       an institute in Germany has done some good research, - the Ithaka foundation, http://www.ithaka-institut.org/en/ct/95-Biochar-Feed-Additives, and not just on cows but all sorts of animals, and below this is a utube of the experience of an East Coast of Australia farmer doing just what I suggested above, feeding his cows charcoal,  it is a very inspiring and concise video, be prepared to be shocked if you have not come across this good information before.

       Again you see the changes coming up from individuals and groups, not imposed by politicians who typically lead by watching where every one is running and then pretending to be at the front.

       https://www.youtube.com/watch?v=_JPoItRWYSQ&feature=youtu.be

17714. NorrisM at 12:39 PM on 30 September 2017
       The Trump administration wants to bail out failed contrarian climate scientists
       

       Well, folks, looks like we are indeed going to have a Red Team Blue Team event!  And guess who is going to head it?

       Here is the following from a July 22, 2017 statement from Science Magazine:

       "U.S. Environmental Protection Agency (EPA) Administrator Scott Pruitt is considering a former official in President Barack Obama’s Energy Department to lead the agency's debate on mainstream climate science, according to a former leader of the Trump administration's EPA transition effort.
       Steve Koonin, a physicist and director of the Center for Urban Science and Progress at New York University, is being eyed to lead EPA's "red team, blue team" review of climate science, said Myron Ebell, a senior fellow at the Competitive Enterprise Institute and a Trump transition leader."

       Just happened to see this when I googled "Steve Koonin Climate Change" for another purpose.

       It will be interesting!

17715. GeoffThomas at 10:08 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Swamp fox, there has now been huge success with feeding cows charcoal, 200to 400 mG/day, the charcoal helps the digestion, reduces infection and is turned into Biochar by the cow, then pooped out and buried by Dung Beetles, leading to healthier cows with higher stocking rates, and rebuilding the impoverished soil, - those farmers using that technique should get the dividend, twould perhaps pay for the charcoal.

       Much land in Australia is very difficult to farm except by running animals on it, and as very little charcoal is lost by this process, the farmer would know exactly how much charcoal he has put into the soil through his cows.

17716. nigelj at 07:08 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Red Baron @9, yes the fee and dividend scheme as presented  is not perfect in its details. I pointed out one potential flaw, but didn't have time to think about other flaws.

       But fee and dividend is clearly a step in the right direction, and I believe right in principle, and needed some positive feedback. Its also not just a supply side concept, because of the dividend which can be applied flexibly to a whole range of things. This is what makes the idea powerful because it regulates emissions at source, (the best thing to do) and also subsidises a range of things and these can be anything we want. No other scheme does both within one scheme, and I think you must do both. 

       Perhaps they could implement fee and dividend scheme so the dividend does go partly to farmers who farm to increase soil sequestration. I can't see why it couldn't.

       And  subsidies have done enormous things to get renewable energy off the ground and could now be phased down slowly. The main thing is to subsidise car recharging networks to get this over the line. The point is you dont need a whole lot of give away subsidies, its just a known range of things that benefit. As you say if theye are targeted at farmers who do things a certin way and get results, they are not an entitlement of freebie.

       Cap and trade in theory as in a text book resolves every possible issue even in theory encouraging soil sequestration indirectly, but comes up against a whole lot of real world obstacles, policial skullduggery, and time frame problems, that make it a dubious idea. 

17717. nigelj at 06:29 AM on 30 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       MA Rodger @38, I agree that makes sense. I'm not a climate scientist, just have some background from physical geography etc, so I can't say much about the calculations, without digging out a textbook or something.

       But here's my take on the issue, and I'm very certain about it. Firstly her assertions on CO2 not being a factor in warming early last century. One glance at a graph of CO2 and its obvious CO2 emissions were still  actually very significant early last century, so must have been a significant factor. Unless she is saying much of the heating from these would be delayed a couple of decades? But clearly CO2 must have played at least "some" role during early last century, and likely more than 10% maybe 30%, is my instinct just thinking about it all.

       But her main point seems to be there wasn't much CO2 early last century so what other factor caused the warming? Surely as a scientist she is well aware that records show solar activity was quite high, and volcanic activity quite low? They certainly contributed to the warming. Its really hard to know the proportions that CO2 contributed, solar contributed, and reduced volcanic activity because records are poor, but its clearly some combination. The quite strong warming is easily explained by a combination of factors. Various different research papers come up with different proportions. But theres no great mystery on what caused the warming, just the exact proportions. 

       By asking a silly rhetorical question already at least partly answered about what caused the warming, she spreads doubt, and suggests either unwittingly or deliberatety  that something else could be causing warming like solar changes, and this could be causing warming now. Thats my take on it, and how uneducated people would perceive it, tell me if I'm wrong.

       Overall her testimony is so flawed, rhetorical, and missing pieces of the puzzle, that it just creates confusion, and every sceptical thing she says gets cherry picked by other sceptics.

17718. RedBaron at 06:07 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       @10 swampfoxh,

       You are wrong about animal agriculture, but this is the wrong thread to discuss it. Please go to the proper thread. I will be happy to discuss it there with you. Maybe a mod can find a link.

17719. RedBaron at 05:59 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       @nigelj #8,

       Yes indeed. That's exactly the sort of thing I am talking about. Battery powered cars running off electricity from solar and wind is very doable. A semitruck, cargo ship, or jet plane run on renewable is not really technilogically feasible right now. We I guess in a pinch we could try and go back to three mast sailing ships, but certainly no where near the same capacity in tons of cargo. Maybe even nuclear powered cargo ships? Still a potential new set of problems. But if we have a sequestration sink that is verifiable like the LCP in agriculture BCCS systems, then we don't need eliminate fossil fuels 100%. Just offset what we don't have the technology to fix with BCCS for a drawdown scenario.

17720. swampfoxh at 05:57 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Carbon fee and dividend, I think, forms the basis of effective public policy, but if that scheme is undertaken only by 1st World democracies, it won't do much to reduce emissions.  Since 2nd 3rd and 4th World countries, together, (whom are administratively very deficient in managing any public program), can torpedo this program, it's probably not going to be a big player in fostering emissions reductions or building renewables.  In the background, sequestration schemes large enough to really count either can't be done and made permanent (e.g. carbon capture) or done so slowly (e.g. soils regenerative) that significant positive effects can't be detected for generations.  It makes no sense to burn fossil fuels and then go 'round trying to scoop out the 0.04% of CO2 that's mixed into the atmosphere...we should just not burn fossil fuels in the first place.  However, the complete elimination of Animal Agriculture could drop, rapidly,  CO2 emissions by about 50%/year which would give us a good deal of breathing room while we turn down the CO2 portion of the greenhouse gases that human activity seems addicted to liberating.

17721. RedBaron at 05:43 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       @nigelj,

        It is still all on the supply side of the carbon cycle, even the so called "cuts" are nothing more than a reduction of the increases of CO2. No where does that sort of tax and dividend fee actually promote sequestration and drawdown of CO2, revenue neutral or not. That type of plan is analogous to just shuffling the deck chairs on the Titanic. No one is patching the hole on the sinking ship.

       Now right here in Oklahoma we have the carbon program that actually has a chance to work. It is a pilot program and still just voluntary. BUT it is functional and it does actually have a chance to literally verifiably reduce atmospheric CO2 if scaled up. Unlike the tax and dividend scheme talked about in the OP. This is because the "dividend" goes only to VERIFIABLE increases in soil carbon. So we have a way to actually remove vast amounts of CO2 and control and verify the payments of the dividends to ONLY those farmers actually sequestering the carbon. It never can become an entitlement, it is paying carbon farmers for farming carbon! And the payments reflect the "crop" they are growing, fertile high carbon soil.

       Carbon Sequestration Certification Program

        

       It is voluntary now but should such a time come when federal plans are instituted it could easily be funded too.

       Now personally I am trying to raise the money to become a demonstration farm for the project. It will cost me about 14 k to do that including the proof of concept I need to run. 

       So far I have raised 10 dollars :P oops. Not much love out there on gofundme. And for some reason I did not get my federal grant. LOLZ But the principles are the same whether it is me personally doing the demonstrations or someone else.

17722. nigelj at 05:19 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Red Baron @ 5

       Maybe add item 4 :Resolve difficulty of cutting aviation and industrial emissions, by using agricultural, soil, and forestry related carbon sinks as offsets.

17723. nigelj at 05:06 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Singleton Engineer @3, I agree cutting emissions is the main thing, but doing this will promote renewable energy anyway.  The beauty of fee and dividend is it pushes money into renewable energy. This process would be the same in rich and poor countries, just rates of construction of renewable energy are clearly very different. 

       There's also value psychologically in promoting renewable energy in the public climate discussions, as its a positive solutions orientated sort of thing that takes peoples minds off endless cuts and the associated difficulties of making cuts.

17724. nigelj at 05:01 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       Swayseeker @4

       With respect these comments have absolutely nothing to do with fee and dividend, literally nothing at all.

       "One could heat areas by using biochar? The dark biochar soil will heat up more than the surrounding land and air above it will heat up and rise, increasing chances of convectional rain, especially because areas of convergence of sea breezes could be induced in the certain areas. One could also use solar air heaters instead of biochar."

       This is just crazy stuff. Dark biochar soil has plants growing in it surely? And even if the biochar is exposed, it would not make that much difference, and would just be a waste of crop lands and would erode.

       What is a  solar air heater?

       "When they fed extra evaporation into climate models it showed that evaporation cools Earth."

       What study shows this nonsense?

17725. MA Rodger at 04:58 AM on 30 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       NigelJ @37,
       Judith Curry's objections are indeed quite petty, numerous and overtly used in feeding the denial machine. Their petty nature generally means she gets away without too much detailed criticisms. Mind, she makes out she doesn't like being called a denier. In her Dec 2015 Senate testimony (PDFp104) she describes this badge-of-courage and counters it by describing three things the IPCC assessments allegedly cannot explain, the least petty of which was the early 20th century warming.

       "Are you aware that temperatures have been warming for more than 200 years and that in the 20th century, 40 percent of the warming occurred before 1950, when carbon dioxide was not a factor in the warming. OK. And I could go on and on. Many of these issues are raised in my written testimony. " (My bold)

       This, of course, is intemperate nonsense from Judy-the-BlogMom and not the words that any serious climatologist would ever utter. To be fair we should examine her written testimony to check she didn't mis-speak. He written testimony tells us:-

       "If the warming since 1950 was caused by humans, what caused the warming during the period 1910—1945? The period 1910–1945 comprises over 40 percent of the warming since 1900, but is associated with only 10 percent of the carbon dioxide increase since 1900. Clearly, human emissions of greenhouse gases played little role in causing this early warming."

       Here we meet a cherry-picked period 1910-1940 which is then associated with "warming since 1900" so I would be inclined to take 1900 as the start-point of any analysis.
       Checking Curry's bold assertions - Using 10-year averages to prevent annual fluctuations causing problems (as per the data in the graph presented in Curry's testimony, although here I use GISS, not HadCRUT) and CO2 forcing from IPCC AR5 AII, the warming 1900-40 is 37% of the 1900-2000 rise and the "associated carbon dioxide increase", ΔF_(CO2) 21%. It appears Curry's testimony is seriously flawed.

       Mind, this method of comparison that Curry attempts is overly simplistic and needs checking. We could instead compare the 40-year period 1900-1940 with the period 1970-2010 and note that the global increase in temperature 1900-40 was 42% the 1970-2010 increase. And the anthropogenic climate forcings increase (for both periods a pretty-linear increase) with the 1900-40 increase 26% that of the later period. (We should also perhaps note in passing that in comparison to 1970-2010, 1900-40 was preceded by decades of relatively high ΔF_(anthro) that would have still been in action thro' the respective periods and also relatively high negative natural forcings, Both these would have boosted temperatures 1900-40 relative to the later period.) These percentages 42% & 26% would compare to Curry's unfounded asssertion of 40:60=67% & 10:90=11%.

       Thus it can be seen that Curry identifies an allegedly unexplained discrepancy to refute the accusation made against her - "I was basically called a denier." But she then unable to grasp the problem in more-than-trebling the size of this discrepancy within her testimony to a Senate Hearing. So it basically sounds like her accusers called it right.

17726. RedBaron at 02:21 AM on 30 September 2017
       Climate and energy are becoming focal points in state political races
       

       #3 Singleton Engineer,

       You said, "They (CO2 emissions) must be cut to zero, avoided, banned and outlawed to achieve the goal."

       This is not precisely true. If this recently published study in Nature is to be believed, then AGW will increase for quite some time even at zero emissions from us, simply due to natural feedbacks we already triggered.

       Evolution of global temperature over the past two million years

       Earth 'Locked Into' Temperatures Not Seen in 2 Million Years

       Of course we really are not "locked into" that scenario if we also effectly start sequestering enough carbon to counter past emissions and start drawdown.

       CCS cant do it.

       BeCCS can't do it.

       But BCCS can most certainly be scaled up enough to at least offset enough if there are significant cuts in emissions.

       Can we reverse global warming?

       Executive summary:

       Yes we can reverse Global Warming.

       It does not require huge tax increases or expensive untested risky technologies. It does not even require 100% elimination of all fossil fuel use.

       It will require a three pronged approach worldwide.

       1. Reduce fossil fuel use by replacing energy needs with as many feasible renewables as current technology allows.
       2. Change Agricultural methods to high yielding regenerative models of production made possible by recent biological & agricultural science advancements.
       3. Large scale ecosystem recovery projects similar to the Loess Plateau project, National Parks like Yellowstone etc. where appropriate and applicable.

       What matters is balancing emissions against sequestration until we have a drawdown scenario. BCCS is potentially scale-able to be big enough to do that with significant cuts on the emissions side, but not necessarily needing to be 100%.

       Trying to be perfect is where the huge costs and technical difficulties come in. If all you need to do is balance plus a small amount more negative, it can actually be done at a net profit. Meaning no net cost at all. And even better it is doable right now without the need of unknown future technical advances.

       In fact eliminating billions and billions of dollars of subsidies for unsustainable energy and ag systems would save us taxparers so much and probably allow the free market to do all the heavy lifting straight away.

       Just a slightly different POV for your consideration.

17727. Swayseeker at 23:08 PM on 29 September 2017
       Climate and energy are becoming focal points in state political races
       

       Regarding the wildfires in Canada and the hurricanes mentioned, why not create areas of two seabreeze convergence (lake breeze convergence) near lakes, on the sea where hurricanes form, etc, to increase rainfall and cause more evaporation and rain to cool off Earth and reduce fires. https://www.sciencedaily.com/releases/2011/09/110914161729.htm explains that evaporation increases low level clouds which reflect solar energy back to space. In fact low level clouds in low latitudes are comparatively warm and radiate heat back to space better than other clouds. Some scientists used to believe that more evaporation could even warm Earth because water vapour is a greenhouse gas. When they fed extra evaporation into climate models it showed that evaporation cools Earth. Florida and other narrow land masses have sea breezes from both sides and there is an area of convergence where high pressure and rising air result where the two breezes meet. This is associated with high rainfall in areas such as Florida. One could heat areas by using biochar? The dark biochar soil will heat up more than the surrounding land and air above it will heat up and rise, increasing chances of convectional rain, especially because areas of convergence of sea breezes could be induced in the certain areas. One could also use solar air heaters instead of biochar. The sea might not be as hot as the sea round Florida, but areas on convergence also occur in New Zealand as shown in http://blog.metservice.com/SeaBreezes See also http://climate.ncsu.edu/edu/k12/.liftingmechanisms

17728. SingletonEngineer at 22:43 PM on 29 September 2017
       Climate and energy are becoming focal points in state political races
       

       I would caution against hyperbole.  There have been comparable or worse hurricanes, perhaps not recently.  The blackout-causing storm in South Australia a year ago was listed as "worst in 54 years", but soon came to be touted as "worst ever... sign that the sky is falling".

       I absolutely accept that climate damage is happening due to greenhouse gases and the oceans are being acidified and warmed and that these things herald trouble ahead, but if the current events are not really the worst ever, then suggesting that they are only invites swift rejoinders from those who aren't seeing the big picture.

       Hence, my personal concern that "renewables" are less important than CO2e emission reduction.  The discussion should centre on the way that reduced or zero emissions globally can be achieved affordably, rather than as at present rich countries in Europe, North America and Australia puffing out their chests with pride about how much money they have blown through in order to convert maybe 5% of their total emissions to so-called renewable electricity.

       What matters... the only thing that matters... is how soon the remaining sources are going to be stopped, including in the countries that are money poor and energy poor.  That will never be achieved by only WWS projects and mountains of money and progress toward this goal cannot be measured in terms of "X thousand notional households".

       Put bluntly, CO2 emissions will not stop because we continue to license or to tax emitters.  They must be cut to zero, avoided, banned and  outlawed to achieve the goal. 

17729. Riduna at 16:47 PM on 29 September 2017
       Right-wing media could not be more wrong about the 1.5°C carbon budget paper
       

       I an not at all sure that Professor Allen enhances the reputation of Oxford University with his latest Paper. It appears to involve a hint of cherry-picking.

17730. nigelj at 12:43 PM on 29 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       Judith Currie is not making a lot of sense to me. She makes a lot of criticisms of the IPCC and climategate and climate science in general. These criticisms are largely quite petty criticisms, or related to isolated problems any professional body will have, or they are idealistic suggestions. She blurts all this out in public forums, and its potentially undermining public confidence in the IPCC. Maybe she is grandstanding, because it just doesn't make sense otherwise.

       Some things are best done in private and by all means forcefully done if required with backup from other colleagues. Not everything has to be in the public domain. And some of her suggestions are good, like putting costs to a range of temperature scenarios.

       If there was a big systemic problem, or many problems, of course blow the whistle, but there just isn't. Climategate comprised leaks (actually theft)  of thousands of emails and you have a couple of small things and numerous reviews done finding no problems. IPCC reports thousands of pages long and about one single mistake on some glacier. Many reviews have already been done of the IPCC. Currie is making the perfect the enemy of the good, time and time again. She is tearing herself and climate science to pieces, and what good has come of it?

17731. Eclectic at 11:09 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrisM @8 , you make yourself ridiculous, to imply that "massive expenditure" in renewables is being proposed in an unjustifiable way.

       Economically, we are already at the crossover point where future power generation is cheaper with renewables wind/solar.   (You may also have noticed the report that half of U.S. nuclear power plants are unprofitable — partly due to fracked gas and partly due to renewables.  Remarkable!!  And worth contemplation.)   Why would any sane person wish future energy infrastructure spending to be on more expensive items than on cheaper items? — and especially so, in view of the need to eliminate CO2 pollution.

       On a side-note : The Marshall Plan was indeed very expensive — yet I gather that the economists' consensus is that it was money very justified in economic terms (not to mention the humanitarian & geopolitical benefits).

17732. Mal Adapted at 10:35 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrisM,

       Here you sound like a genuine skeptic:

       I have come to realize that the whole issue of climate change and what to do about it is a massively complex matter which is difficult for the layman to grasp. It does worry me whether the public at least could ever get any benefit from a Red Team Blue Team approach.

       Here you don't sound very skeptical, IMHO:

       What continues to scare me is that we are being asked to expend massive amounts of money (GDP that could have otherwise been directed to other places) to convert from fossil fuels. 

       Who is asking you to expend massive amounts of money to convert from fossil fuels? While some targeted subsidies might be cost-effective, all the technology needed to substantially decarbonize the global economy has been invented, awaiting only investment in R&D on more efficient production and distribution, and economies of scale. With a nudge from the 'visible hand' of collective intervention in the 'free' market to re-internalize enough of the marginal climate-change costs of fossil fuels, the omnipresent 'invisible hand' can help steer the carbon-neutral transition rapidly, fairly, and at the lowest net cost. 

       A revenue-neutral US Carbon Fee and Dividend with Border Adjustment Tariff , for example, would not increase the average federal tax burden. The combined revenues, collected from fuel producers and importers of manufactured goods, would periodically be divided by the number of taxpayers and returned to each of us as a dividend. While the average taxpayer would break even, those who consume more fossil carbon than the national average would, essentially, pay those who use less. CF&D with BAT is effectively a progressive tax: since per-capita energy consumption in fossil carbon equivalents per year is positively correlated with income, there would be a net income transfer downward. The Border Adjustment Tariff would keep US manufacturers competitive domestically and encourage our trading partners to follow our lead.

       Returned to every taxpayer in equal-sized dividends, under CF&D with BAT the fee and tariff revenue would remain in consumer hands, to drive demand for currently available carbon-neutral alternative energy, at prices that compete with fossil fuels accounting for a scientifically justifiable, lower-bound estimate of the marginal cost of CO2-equivalent emissions. With accurate pricing of the true costs of energy from the available sources, market forces will build out alternative energy supplies and infrastructure, until average energy prices are about what they are now. And for now, the buying power of US consumers is still sufficient to propagate decarbonization throughout the globe's tightly integrated economy.

       See citizensclimatelobby.org for more information.

17733. Philippe Chantreau at 09:53 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       I find the concern about spending massive amounts of money for energy transition is misplaced. No such concern was present in the years leading to the 2008 crisis, and the World spent 15 trillions with absolutely nothing to show for it because the entire US financial market had become fradulent; this was made possible by infiltrating regulating bodies with free market nuts who believed that it was all going to regulate itself with people driven exclusively by exteme greed at the wheel. We all know how that ended. Greenspan himself had to confess that he had made the screw up of a life tine when he allowed this belief to be implemented.

       Remarkably, however, the World economy has recovered in less than 10 years, and the effects were a far cry from what was experienced post 1929. If we could spend 15 trillion to indulge the frantic greed of a few criminals, why can't we spend the same for a true energy transition, something that will leave a lasting positive effect on all of humanity? There is no good answer to that question, none. The only morally justifiable thing to do is the carry on the energy transition with at least the same urgency that the criminals expended on the task of enriching themselves.

       In a recent NYT editorial, another free market fanatic made the argument that Harvey was going to be barely a blip in Houston march to prosperity. Little did this person realize that this can be turned around and one can just as well argue that if the Housont area economy can merrily absorb 200 billions of hurricane damage, it could as easily absorb 200 billions of energy transition investment in one quick setting. Priorities... 

17734. Doug_C at 07:11 AM on 29 September 2017
       Climate and energy are becoming focal points in state political races
       

       I also support the fee and dividend system with an escalating fee on fossil fuels at the source and a direct divident to energy consumers. This allows the energy sector to plan for the time when fossil fuels become non-competitive and gives consumers the resources they need to support alternatives.

       I live in southern British Columbia, Canada and have relatives just across the border in Washington State. The amount of wildfires here is unprecedented, BC still has massive wildfires burning, one over 1,000,000 acres, overall more than 2.5 million acres are or have burned here this season. Oregon, California, Washington State and Montana are all also experiencing the same catastrophic impacts due to the warmer drier summers already this will become an even more acute situation as the years progress. This is clearly a global phenomena as Australia, Siberis and other places are also experiencing record widlfires along with many other impacts globally.

       I also have family in Texas and know people in Florida who were impacted by some of the worst hurricanes ever recorded, considering that these massive storm systems gain their strength directly from warm ocean water, this is also something that southern US states will be combating for decades to come. Any sound policy on the state level must factor in the costs of not mitigating climate change impacts which are already significant. Harvey is estimated to have done alomst $200 billion in damage in Texas and Irma caused at least $10 billion in Florida and other nearby states. Not to mention the deaths which are in the hundreds from all the hurricanes across the Caribbean, Central America and US south this year.

       While it is unfortunate that the current US president has choosen to ignore the glaring reality on this in favor of a position that is clearly unsustainable and unsupported by evidence, it is good to see that other levels of US government are stepping up.

       In the end I think that real change on this issue is going to come from the ground up, citizens demanding that their elected officials implement policies based on the best evidence not the worst.

17735. nigelj at 06:46 AM on 29 September 2017
       Right-wing media could not be more wrong about the 1.5°C carbon budget paper
       

       Gorgulak @5, I know exactly what you mean, its confusing and hard to work out how they get there. The following article explains it ok:

       www.realclimate.org/index.php/archives/2017/09/is-there-really-still-a-chance-for-staying-below-1-5-c-global-warming/

       It's a combination of things. Firstly theres very little discrepency between models and latest real world temperatures taken as a average of all temperature data sets. But the  study uses the hadcrut data which shows the least warming ( I have no idea why they would do that and select just one set of data as opposed to an average) so magnifies the discrepency. Secondly theres some issue about how the study considers carbon budgets explained in the article. But be warned its a bit headache inducing!

17736. nigelj at 06:23 AM on 29 September 2017
       Climate and energy are becoming focal points in state political races
       

       Fee and dividend is an absolute winner for me. It solves a whole range of problems, including getting right at the source of the problem, various practical issues, being fair to consumers, overcoming various political / ideological objections. The fact that just one idea solves so many different problems suggests the idea is inherently the right one, and certainly practical in real world terms. In contrast cap and trade seems to have some problems applied in the real world, and a patchy record where it has been used.

       The fee will possibly push up petrol prices (although this is not inevitable), and it will be a good incentive to buy less petrol. However if the dividend is purely cash in hand it will cancel this out, so it's important the dividend is largely some sort of voucher for buying home insulation, electric cars, and perhaps home appliances to try to at least minimise this leakage effect, and push things in the best direction. 

17737. gorgulak at 05:39 AM on 29 September 2017
       Right-wing media could not be more wrong about the 1.5°C carbon budget paper
       

       Why is it that projecting out from the IPCC models gets you 70 GtC remaining whereas this new analysis gets you 200 GtC? From what I've read it seems like they haven't changed anything about the models but only adjusted them to todays temperature and emissions. You get 70 GtC if you project outward without adjustment, but the models have underestimated where we would be emissions-wise and slightly overestimated where we would be temperature-wise. So if you project outward from 545 GtC you're projecting out from the 2020's where the median of the models predicted we would be for emissions, which is also at a higher temperature and atmospheric co2 concentration. Is all of that right?

       I understand that the actual difference between the models and observations is not 0.3 C but is much smaller. I'm just wondering how you get 3x more carbon budget while still projecting the same rates of warming and without a new "warming per tonne of co2 emitted". Is it simply the small adjustemnt to account for todays temperature and emissions that gets you that?

17738. John Hartz at 05:07 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrsM: For information about the costs of energy, check out the Energy Mix website. Its stated purpose: 

       The Energy Mix is your guide to climate change and energy issues and solutions. Whether you’re looking for the latest content on the impacts of climate change, the fossil industries that produce the emissions, renewable energy and energy efficiency alternatives, or climate solutions outside energy, you’ve come to the right place. Please send us your comments and story ideas!

17739. John Hartz at 04:53 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrisM: Your concerns about the lack of an SkS article about the PNAS paper, Evaluation of a proposal for reliable low-cost grid power with 100% wind, water, and solar by Clack et al are duly noted.  There is no need for you to bring this up again. (Excessive repetition is prohibited by the SkS Comments Policy.)

       As you may be aware, the Clack et al paper generated a lively discussion as evidenced in the following articles:

       Dear scientists: Stop bickering about a 100% renewable power grid and start making it happen by Joe Romm, Think Progress, June 20, 2017 

       Jacobson Pushes Back In Fierce Fight With Modelling Critics by Julian Spector, The Energy Mix, June 20, 2017 

17740. NorrisM at 04:27 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       Correction.

       "commentary on the Clack paper" instead of "commentary on the Jacobson paper".

17741. NorrisM at 04:26 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       John Hartz @ 7

       Thanks for your reply.  It just seems to me that in the interests of "balance" a commentary on the Jacobson paper would have been appropriate.  I still think that SkS should take on the issue of costs of converting from fossil fuels to RE.  it would be easy to create a "myth" even based upon my worries as expressed in my reply to Eclectic.

       If there is a website similar to SkS which deals with costs, perhaps you could direct me to it.

17742. NorrisM at 04:20 AM on 29 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       Eclectic @ 6

       Thanks, I will read with interest the blog following McKitrick's essay including Hausfather's comments.  I have actually bit the bullet and purchased a pdf copy of the Millar paper so I have a better idea as to what it actually says (to the extent I can understand it). 

       I have come to realize that the whole issue of climate change and what to do about it is a massively complex matter which is difficult for the layman to grasp. It does worry me whether the public at least could ever get any benefit from a Red Team Blue Team approach.

       What continues to scare me is that we are being asked to expend massive amounts of money (GDP that could have otherwise been directed to other places) to convert from fossil fuels.  I cannot think that there has been any other time in the history of the US where such massive expenditures have been proposed based upon predictions which are in turn based upon economic models.  The closest I can think of was the faith that the Marshall Plan expenditures would result in democracies in Europe.   I suspect that the expenditures of the Marshall Plan as a percentage of GDP would be far less than the US costs of conversion to either wind and solar or, for that matter, nuclear power.

17743. MA Rodger at 01:17 AM on 29 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       Eclectic @34,
       You say you have examined the history of Judy's little asteroid Climateetc but that was not the start of her journey to the dark side. A lot of stuff preceded the creation of Climateetc in Sept 2010 but, as with much else, Judy has her own take on the journey she took. Her version of it is set out at the start of her 2015 Senate testimony:- (PDFp39)

       "Prior to 2009, I felt that supporting the IPCC consensus on climate change was a responsible thing to do. I bought into the argument don’t trust what one scientist says, trust what an international team of 1,000 scientists have said after years of careful deliberation.
       "That all changed for me in November 2009, following the leaked ‘‘Climategate’’ e-mails that illustrated the sausage-making and even bullying that went into building the consensus. I started speaking out, saying that scientists needed to do better at making the data and supporting information publicly available, being more transparent about how they reach conclusions, doing a better job of assessing uncertainties, and actively engaging with scientists having minority perspectives.
       "The response of my colleagues to this is summed up by the title of a 2010 article in the Scientific American, ‘Climate Heretic: Judith Curry Turns on Her Colleagues.' I came to the growing realization that I had fallen into the trap of group think. I had accepted the consensus based on second-order evidence, the assertion that a consensus existed."

       This seems to suggest that in the two days following Climategate, Judy went from happy-bunny climatologist to happily posting on denialist websites like Wattsupia (a re-post from ThinkProgress but Wattsupia is the version she links to here) and denialist Climate Audit, the place she tells us "became my blog of choice, because I found the discussions very interesting and I thought, ‘Well, these are the people I want to reach rather than preaching to the converted over at [the mainstream climate science blog] RealClimate.’” That's a big big shift in just two days, Judy! Almost as abrupt as the next leap to full denialist in the following year, assuming you go along with Judy's timeline.

       The story actually begins in 2005 with Webster et al (2005) 'Changes in Tropical Cyclone Number, Duration, and Intensity in a Warming Environment'  which was published just as the 2005 hurricane season was making hurricane studies highly political. So the paper drew a lot of denialist flack from contrarians to which Judy found herself responding (being a co-author) and was still providing expert hurricane testimony in July 2006.  She was also the lead-author on a paper addressing the scientific argumentation of hurricane studies (although note that while the article is described here as "unapologetic in advancing their particular point of view", the article is actually setting out its scientific position as being no more than "the central hypothesis."
       But there are then the first signs in 2006 of Judy falling out with her scientific colleagues but over the narrow issue of how to treat with denialists. We find Judy commenting at what would become her "blog of choise" ( eg. about halfway down this 2006 thread where she would soon earn her posting rights). Also in 2006, she was talking on the need for engaging with denialism which heavily hints at her future path. This 2006 talk was tellingly titled "Falling Out of the Ivory Tower" and bullet points included ♠ inadequate assessment and communication of uncertainty ♠ turf battles and appeal to authority ♠muddy relationship between climate research and policy. It can thus be seen that Judy was already engaging with her "group think" monster by 2006, years before 'climategate'.
       Her immediate response to 'climategate' (in web-pages linked above) was to advocate openness so denialists can spot any errors allowing (apparently) corrections to be made with minimum fuss. "Doing this would keep molehills from growing into mountains that involve congressional hearings, lawyers, etc." while she says she isn't implying "climate researchers need to keep defending against the same arguments over and over again." (I would agree with this last point as they would instead have to 'keep defending against the same arguments over and over & over & over & over & over again, ad nauseam.')
       And by mid-2010 our Judy had become one of her own "scientists having minority perspectives" becoming an uncritical conduit for denialst argument and thus unable to connect with her peers (as her input into this July 2010 RealClimate comment-thread well demonstrates).
       Two months afterwards she had her little un-worldly asteroid Climateetc to retreat to, where she could cultivate her persona as The Daily Mail climate scientist of choice.

        

       
       Tapping this out, I was surprised to read in that article critical of Judy which she cited in her testimony that:-

       "Curry asserts that scientists haven’t adequately dealt with the uncertainty in their calculations and don’t even know with precision what’s arguably the most basic number in the field: the climate forcing from CO2 —that is, the amount of warming a doubling of CO2 alone would cause without any amplifying or mitigating effects from melting ice, increased water vapor or any of a dozen other factors."

       Question- Is that right? Has she fallen that far into the denialistic pit to consider this a substantive issue. Answer - She certainly had back in Dec 2010.

17744. John Hartz at 23:42 PM on 28 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrisM @35: You wrote:

       I have seen no criticism whatever by this website of the June 2017 paper of Clack (NOAA) et al published by the Proceedings of the National Academy of Sciences which has roundly criticized the Jacobson cost study to the point of questioning its validity.

       As has already been pointed out to you, the primary focus of SkS is the science of climate change and related matters.  The fact that none of the volunteer authors who generate articles for posting on SkS chose not to post an article critiquing the PNAS paper you have referred to is rather insignificant.

17745. Eclectic at 22:13 PM on 28 September 2017
       New paper shows that renewables can supply 100% of all energy (not just electricity)
       

       NorrisM , I thought I ought to transfer some of my reply to you about the Jacobson paper, from where you had mentioned it as an en-passant footnote in "another thread" :-

       I had said :

       "... Jacobson draws a long bow into the technological future.   IMO his emphasis on hydrogen fuel was way over the top, and as you rightly say his hydro-power summation is nowadays shown as a big error.   #Nevertheless, none of that is in any way an excuse not to press ahead with wind/solar conversion at a much faster rate than we are doing currently" .

       The Jacobson study continues to have value as one of many talking-points regarding future developments . . . despite its lack of perfection.  Yet it is always important that we "keep our eye on the ball" of what we need to do now to tackle the ongoing AGW crisis.

17746. Eclectic at 20:47 PM on 28 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       NorrisM @5 , thanks yes — I happened to be reading the McKitrick article on J. Curry's Climate etc blog a few hours ago.   I reckon you would be greatly exaggerating the matter, to describe the article as causing a kerfuffle.  [or did you mean: causing a covfefe?  ;-)  ]

       IMO it was quite a yawn ~ just McKitrick trying to make a beat-up over very little.  Far more interesting, NorrisM, were some of the posts in the Climate etc comments column attached to it.  No, not the many usual run-of-the-mill Room Temperature IQ comments (though at least they're relatively civil compared with those on other denialist websites).  But you will find a number of interesting/entertaining posts by Zeke Hausfather.  You won't need to read very far between the lines, to see Hausfather's icy-polite stiletto puncturing McKitrick and basically pointing out that McKitrick is talking horsefeathers.

       ( You may not be aware of it, NorrisM, but McKitrick has an abysmally low reputation among scientists.  The website rationalwiki is often entertaining in its assessments — and the McKitrick entry is worth a look.  Be prepared for a guffaw !  And similarly in their assessments of other climate-denialists, not to mention other areas of non-science. )

       Your side-note comment on the Jacobson 2015 study (mentioned briefly on "another thread" on Sks — "New Paper Shows That Renewables ... " ) ~ yes true there were only about 80 (date 2015) comments there, and many of them were of low quality and unhelpful, and probably you glanced over those ones predating your 2017 comment.  But Jacobson draws a long bow into the technological future.   IMO his emphasis on hydrogen fuel was way over the top, and as you rightly say his hydro-power summation is nowadays shown as a big error.   #Nevertheless, none of that is in any way an excuse not to press ahead with wind/solar conversion at a much faster rate than we are doing currently [and IMO that aspect makes the Jacobson study a very low priority for discussing as a "hot topic". ]

17747. Rbrooks502 at 17:53 PM on 28 September 2017
       Correcting Warren Meyer on Forbes
       

       cool thanks.

       I will follow with more as I progress. I thank for taking the time with me. 

17748. nigelj at 16:17 PM on 28 September 2017
       The Mail's censure shows which media outlets are biased on climate change
       

       Eclectic @34, definitely interesting thanks. I hear you.

       I read The Hitchhikers Guide when quite young. He has written several other similar books all well worth a read,  just in case you haven't come across them, easily enough googled, especially So Long and Thanks for all the Fish.

       I'm a little bit interested in human motivation. I did some clinical psychology  at varsity just a couple of introductory papers, (I needed some extra credits) so hence my interest in climate scepticism and its driving causes. People are a bit complex and unique in their psychology and mix of motivations, and this makes climate denial a bit challenging to deal with, but there are a few main things of course noted from time to time on this website. I'm convinced theres no one thing you can boil climate scepticism down to, its a complex combination of vested interests, poor science knowledge,  political reasons, resentment of rules, psychological factors, personal ambitions, ego, and sense of entitlement etc.

       The human race. Brilliant but mad as you say. That's evolution for you, complex and untidy.

17749. NorrisM at 16:08 PM on 28 September 2017
       2017 SkS Weekly Climate Change & Global Warming News Roundup #38
       

       Here is Ross McKitrick's analysis of the Millar et al paper that seems to have caused such a kerfuffle:

       "Millar et al. attracted controversy for stating that climate models have shown too much warming in recent decades, even though others (including the IPCC) have said the same thing. Zeke Hausfather disputed this using an adjustment to model outputs developed by Cowtan et al. The combination of the adjustment and the recent El Nino creates a visual impression of coherence. But other measures not affected by the issues raised in Cowtan et al. support the existence of a warm bias in models. Gridcell extreme frequencies in CMIP5 models do not overlap with observations. And satellite-measured temperature trends in the lower troposphere run below the CMIP5 rates in the same way that the HadCRUT4 surface data do, including in the tropics. The model-observational discrepancy is real, and needs to be taken into account especially when using models for policy guidance."

       This article, which can be referenced on the ClimateEtc Judith Curry website seems to be reasonably balanced.  I first read it and thought that maybe the "overstatement of the models" was an overstatement.  But .3C is a fair bit when we are talking about 1C since pre-industrial times.

       I see that in fact the IPCC did acknowledge in 2013 that the models were predicting warming beyond observations.  I took a look at their chart which is actually updated by McKitrick to reflect the 2016 El Nino.  So this is why Ben Santer, in the APS 2014 panel review acknowledged that Christy's claim of a significant variance was "old news".  At least it has now been acknowledged.  Does not change the question as to what we should do about it.

       On that point, I am still waiting for someone to respond to my question (on another stream) regarding the Jacobson 2015 study on wind and solar costs of replacing fossil fuels in the US by 2050.  I have seen no criticism whatever by this website of the June 2017 paper of Clack (NOAA) et al published  by the Proceedings of the National Academy of Sciences which has  roundly criticized the Jacobson cost study to the point of questioning its validity.  

       Moderator Response:

       [DB] Satellites do not measure temperatures, they measure brightness.  Brightness is converted to temperatures via computer models with 5 times the error bars of the surface temperature record.  Satellites do not measure the surface, where people live, they measure where airplanes fly.

17750. bozzza at 13:54 PM on 28 September 2017
       Right-wing media could not be more wrong about the 1.5°C carbon budget paper
       

       FDDs

       The temperatures above 80N are really starting to trend... and business and industry need long lead times to react properly.

       Resource bottlenecks have always been the predicted result when people start realising all at once what the truth is. Why is this truth being hidden from the consuming taxpayer who a) lives in a democracy and b) is supposed to have consumer rights?

       We need to decide what is the most important information and each tell a thousand of our friends as fast as possible: I put it that this graph is one of those most important pieces of information...

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