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Comments 28301 to 28350:
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ranyl at 00:10 AM on 15 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
"To avoid global warming of as much as 4 degrees Celsius by the end of the century, the scientists suggested civilization has a total budget of 900 billion metric tons of carbon dioxide in the atmosphere, and the world has already added roughly 592 billion metric tons since 1780."
From article @JH 5.
So less budget than the fictious 1000billion Tom C's diagram shows for 4C.
"The argument against CCS is strong. Critics, however, often overlook the fact that making steel and making cement—the fundamental substrates of all power plants, whether wind turbines and solar rooftops or new nuclear—spew copious CO2, as does making the fertilizer that has made more than seven billion humans on the planet today possible. If the goal is zero- or negative emissions, these emissions will have to be eliminated. The only proposal at present to do so is CCS."
CCS is very expensive and reduces power plant efficiency even if powered by biomass.
Although the carbon negative claims are theoretically possible, most massive biomass production production is heavily carbon emissions loaded due to industrial farming, land change, fertilizers (production), pesticides, processing and tansport, and if power plant less efficient you need more biomass to get the same power an therefore more potential conflict with food and biomaterials production.
I'm with Tom R all carbon negative asap, and call for chances of avoiding serious stuff 1:20 chnace which is common level for medical practioneers to consider thngs safe, i.e. there is a less than 1:20 chance that the treatment doesn't actually improves things.
If people keep contemplating a budget rather than a huge debt people will just do lots of fancy accounting and CO2 emissions will just keep on going up.
And don't forget the mass extinction event, implying the earth ecosystem needs repairing quickly as well, making things like pesticides, synthetic fertilizers, pollution, e-waste, rare earth metals, mining, deforestation and anything associated with toxic waste production kind of not sensible either.
Where do stand?
Let face it people are more worried about Scotish MP's voting on fox hunting than all this environmental stuff.
Someone recently said to me that they felt I had good points but prefered just to not take notice as it meant they just function in their lifes, which were hard enough without having to worry about enviromentlachange as well.
For me the only way to turn things arround on a tupence (as needed) is for everyone to want to.
But at present it seems everyone wants to maintain BAU at all costs, be it powered by fossil fuels or the alternative environmental and GHG associated energy production systems available; playing at being accountants and accountants can make anything look rosey if they try hard enough.
Wonder how many more extremely extrem weathe revents in a row will be needed before cliamte change is a high priority for everyone and not just a political tool to say the right thing about and hope for the children that its all been hot air?
Moderator Response:[JH] Excessive white space eliminated.
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Tom Curtis at 23:27 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
John Hartz @5, Schellnhuber is good company indeed. Thankyou.
@6:
In a previous thread I wrote:
"[It] is quite obvious that if it is acceptable, in 2018, to replace existing houses or to build carbon neutral houses, then it is also acceptable to replace an existing house with two 50% carbon neutral houses; or to modify an existing house to halve its carbon emissions, and build a new house with just 50% of current emissions per house, and so on. In particular, each 1% reduction in emissions from national electricity generation makes room for further economic growth.
Ergo, Stephen Leahy's formula sounds dramatic, it really represents only a formula for no more emissions growth from 2018. Rather than a cessation of emissions growth (and hence ongoing growth in CO2 concentration), what the world needs is the almost complete elimination of net anthropogenic emissions by 2050, and hence on the order of a 3% reduction in global emissions per annum. That is a doable target. Even with slow initial progression, a genuine attempt to move in that direction will allow very rapid strides in the near future. It is not, however, something on which we can delay - and each year that we delay - each year you win your struggle for inaction makes the cost of transition higher (because it must be more rapid), and the end benefit lower (because of increased global warming durring the delay)."
Obviously, even in context I agree with TomR's interpretation. As to his suggested strategy, I do not believe it is necessary or achievable as a globally averaged target. However, if we are to limit emissions on a per capita basis, as is required by simple considerations of justice, Western societies, and their citizens individually must indeed go net carbon negative as soon as possible, or purchase unused per capita emission credits from the third world to make up any overshoot.
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John Hartz at 23:07 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
Tom R: You are taking a phrase of a sentence out of context. Here is the context.
“By 2018, no new cars, homes, schools, factories, or electrical power plants should be built anywhere in the world, ever again unless they’re either replacements for old ones or are carbon neutral? Are you sure I worked that out right?” I asked Steve Davis of the University of California, co-author of a new climate study.
The above is the second paragaph of the OP.
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John Hartz at 22:56 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
Tom Curtis:
You are in good company...
In Paris Hans Joachim Schellnhuber, a climate physicist and chair of the German Advisory Council on Global Change, called for "an induced implosion of the carbon economy" over the next few decades, a shift he compared with efforts to end slavery in the last few decades of the 19th century. Without such a momentous shift in the global energy system, there is "not the slightest chance of avoiding dangerous, maybe disastrous climate change."
Zero Carbon or Bust: Scientists remind policy makers that CO2 pollution must end--and soon by David Biello, Scientific American, July 13, 2015
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TomR at 22:56 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
"[U]nless they’re either replacements for old ones...." seems to suggest that replacing your fossil fuel dinosaur vehicle with another such fossil fuel vehicle is OK. Clearly, it is not. Great article although I am sure that with permafrost and methane clathrate emissions, which are already accelerating in the Arctic, it is already too late to prevent a 2C global atmospheric temp increase.
Please eliminate the "either replacements for old ones" part or explain to me what I am not understanding. We must each and everyone of us go carbon negative as soon as possible. No excuses.
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Tom Curtis at 22:27 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
Apposite to this post is this chart showing historical and projected energy related emissions, and the percentage of our carbon budget used consistent with a 50-50 chance of staying below 2 C at 2100:
I got the chart from John Baez, who in turn found it in the International Energy Agency report World Energy Outlook Special Report 2015 (Figure 2.3). It is clear from this graph that we need to halve current emissions by 2040, and (approximately) eliminate emissions by 2065 if we are to avoid overshoot on that less than ideal target.
In fact, the chart does not include Land Use Change (LUC) related emissions, which constitute approximately 20% of anthropogenic emissions even now, so those targets are generous and we should expect faster reductions than that if we are to meet the target. Indeed, it is dubious if all LUC emissions can be eliminated meaning some means of sequestring carbon is a necessity for the future. As it is unlikely to be cost effective, however, emissions reduction should be the first objective were possible.
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Tom Curtis at 21:58 PM on 14 July 20152015 SkS Weekly Digest #27
Michael Fitzgerald @36:
"... which brings us back to my original question asking what is the sensitivity as a function of temperature so I can perform a definitive test.
The test starts in equilibrium at absolute zero and increases total forcing in 1 W/m^2 steps, allowing the system to stabilize after each step. The resulting change in temperature is the sensitivity to 1 W/m^2 of forcing at the current temperature. From the quantification of sensitivity as a function of temperature, calculate the expected sensitivity at the current temperature and increment the current temperature by that amount. After 239 steps, the resulting temperature must be around 288K at a sensitivity of 0.8C per W/m^2 or else the prediction fails."
I believe that unless you reduce the test to the trivial question as to the temperature response to total forcing plus feedbacks at the surface, in which case the response function is given by the Stefan Boltzman law applied at the surface, your test is entirely unsuitable. That is because:
1) The response function to forcing alone varies greatly with temperature as different feedbacks kick in and vary in strength and rate of change with temperature. That in turn means that to perform your test we would need to know for each of those feedbacks exactly at what temperature they kick in, and how they vary with temperature. In turn that is something we cannot know from observation, in that most of the relevant temperature range has never been experienced on Earth, and all of it except the last 1% of the temperature range has not been experienced when we could make instrumental observations. Further, we cannot know it from computer models because the relevant experiments have not been done, and even if they were the models would be operateing so far outside their design range as to make the responses almost meaningless. Combined, this makes your test analogous to determining the slope at an unspecified location on the mountain range by adding together the altitude change per kilometer from from the nearest coastline to ensure it gives the correct altitude, when there has been no detailed survey of the topography between the coast and your current location.
2) This difficulty is compounded by the fact that the temperature change with change in forcing differs in some circumstances depending on whether you are cooling or warming. This hysterisis in the atmosphere was certainly a feature of the (at least two) snowball Earth states experienced in the distant past and have been conjectured to be a factor on a smaller scale on time scales relevant to the modern. Ergo your whole of mountain range test of the current slope does not even have unique values for the slope at a given forcing.
In short, your "definitive test" is nothing of the sort. It is not even a doable test; and to the extent that we can approximate to it, the results are so uncertain as to be meaningless.
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ranyl at 21:53 PM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
350ppm means at least 1.6C temperature rise (Pliocene temperature 2C estimated by Hansen 2011 and assuming 60% heating 100 years), and as the temperature for the early Pliocene (last time CO2 350ppm -400ppm), is most often estimated to be between 3C-5C this implies a more likely temperature rise of 1.8C to 3C, for 350ppm.
And 350ppm by 2100 means there hasn't been any carbon budget for some while and the atmospheric CO2 will have been >than 350ppm for >100 years even if 350ppm is achieved, therefore 60% of the warming by 2100, the 1.8C (luckiest result) to 3C(worst case scenario) is kind of inevitable.
Further stopping all carbon emission today and 350ppm isn’t achieved until 2200 even if all CO2 emissions stopped in 2010, if permafrost releases are counted, and that is not mentioning, forest fires, peat fires, and the reduced biosphere fertilizer affect if synthetic nitrogen fertilisers use is reduced.
Even further clean the air of sulphur dioxide emissions and the true CO2 levels at present called the CO2e is ~470ppm.
Can we afford to make anything more by 2018 considering associated carbon emissions?
How much carbon emissions and biodiversity losses are incurred by none native rubber plantations (mainly for tyres) in China say?
Nor do they include the carbon emissions from large scale hydro electric dams as these are deemed carbon negative, so a double whammy.
A couple of interesting articles on the overall effective emissions from renewables and the author's don't seem to be fossil fuel advocates.
Richard York1 Do alternative energy sources displace fossil fuels?
Nature Climate Change Volume: 2, Pages: 441–443, 2012
“Non-hydro renewable sources have a positive coefficient, indicating that renewables tend to simply be added to the energy mix without displacing fossil fuels.”
“Hydropower destroys river ecosystems and threatens the survival of anadromous fish and other aquatic species11.
Solar voltaic power and wind power, although representing less serious environmental threats than nuclear power and hydropower, require large amounts of material, some of it toxic and energy-intensive to produce, as well as large areas of land to produce substantial amounts of energy12.
In short, all energy sources have environmental costs.”
“A general implication of these findings is that polices aimed at addressing global climate change should not focus principally on developing technological fixes, but should also take into account human behaviour in the context of political, economic and social systems.”
Andrew K. Jorgenson1 Energy: Analysing fossil-fuel displacement
Journal name: Nature Climate Change Volume: 2, Pages: 398–399 Year published: (2012)
“Besides contradicting the proportional displacement assumption, York's research adds to the growing body of environmental social science that highlights how societies cannot only rely on technological solutions to reduce fossil-fuel use and thus anthropogenic carbon dioxide emissions6, 7, 8. To effectively reduce emissions, societies need to focus on reducing the consumption of energy at both the individual/household level9 and the system level, with strategies geared towards broader changes in the economic, political and cultural spheres10. More broadly, York highlights the importance of integrating research on the human dimensions of climate change — such as the role of individuals and collective human behaviour, the characteristics of social institutions and the complex interrelationships between the world's nations — with research on technological solutions to tackle greenhouse-gas emissions”
Can humanity get off fossil fuels?
Realistically considering the current situation is that actualy possible?
And as powering down is the only to actually prevent fossil fuels emissions, can this down and miantian well being and happiness?
Can we power down beyond efficiency gains (lots mahcines are very efficient already, people have working on this years, and replacing old inefficinet ones is of course adding to the carbon debt) or it that too much?
Wouldn't war have to cease to stop carbon emissions?
Moderator Response:[JH] Excessive white space eliminated.
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MA Rodger at 21:41 PM on 14 July 20152015 SkS Weekly Digest #27
Moderator [PS} @38.
While the the nub of the question is quite specific, I am not at all sure where it will lead. This interchange transferred here (being off-topic elsewhere) as it appeared to require an open thread to allow for all the ramblings. If it does resolve into a single point of discussion, that would be the time to consider transferring to an appropriate thread.
Michael Fitzgerald @38.
You say "After 239 steps, the resulting temperature must be around 288K at a sensitivity of 0.8C per W/m^2 or else the prediction fails." This is untrue. Firstly, a lot of the workings of climate are dependent on the existence of life which wouldn't survive the initial drop to 0 K and its absence would have a significant impact on the result (although not a massive one). For instance, there would not be an oxygen-rich atmosphere without life and the methane cycle is driven by life. Secondly, the state the planet ends up in could be a snowball earth. If this step-forcing you envisage results in a snowball shiny enough to keep CO2 as well as H2O as part of geology and not part of atmosphere, there will be no warm state to flip into. And further, that warm state could be a warm ice-free planet, not the 'small' ice version we have today. So what you envision by your 239 steps is more 'thought experiment' than the physics of an alternate world that you appear to imagine.
The thesis you present (if I read you right) is that the accepted estimate of ECS=1.5 to 4.5ºC would look silly and utterly incongruous if even a rough graph of ECS were drawn out for a planet Earth subject to differing levels of climatic warming from 0 Wm-2 up to the present-day effective-solar-heating of 239 Wm-2. Surely, you say, the physical guts of this is the Stefan-Boltzmann relationship as per the zero-GHG planet, and that is an inverse-quartic relationship. The stated 150 Wm-2 of the GHGs might provide the planet with +33ºC of heating (and yes, something has to be responsible for that +33ºC), but (as you put it @28) for a planet at 15ºC a CO2 forcing of 1 Wm-2 would require an extra 3.3 Wm-2 of feedback to achieve the accepted central ECS=3ºC which is nothing near the ratio 150Wm-2/239Wm-2 = 0.6. This extra 3.3 Wm-2 of feedback therefore has to be a fantasy and AGW with it. (Or is that "CAGW with it"?) Doesn't it?
Of course the Stefan-Boltzmann relationship applies to the planet at an effective temperature of -18ºC and the requirement is 2 Wm-2 fo feedback for an ECS=3ºC. The 150 Wm-2 of the GHG is not all feedback. And not all the feedback is GHG. The various GHG contributions are not additive but ignoring that, about half of it is a combination of water vapour (positive feedback) and lapse rate (negative feedback). Clouds produce about a quarter. CO2 provides about 20% and that isn't a feedback, but extra to the GHG feedbacks are the significant albedo feedbacks.
Now, as water vapour seriously kicks in at -20ºC, ice melts at 0ºC and vegetation above 0ºC, the feedbacks don't apply at cold temperatures. So does that amend this thought experiment? I think it would.
Moderator Response:[PS] my concern was that whereever a discussion leads, it is better to take steps one at a time rather than leaping all over the place. Michael clearly thinks there is at least a possibility of low sensitivity which is why I would prefer discussion moved there. He also clearly needs to understand direct feedback before considering the more complex feedbacks of albedo, clouds, water/CH4 etc.
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Tom Curtis at 21:33 PM on 14 July 20152015 SkS Weekly Digest #27
Michael Fitzgerald @38, you are discussing this topic here because all topics are on topic on the weekly digest posts. Therefore it is hardly possible that Philippe Chantreau's post is off topic. It may be non-responsive, but that it a different matter entirely (and I am far from convinced that it is). There may also be a more appropriate thread for his comments, in which case courtesy (and the comments policy) dictate that he should use it apart for brief responses, but I am not aware of that more appropriate thread and neither you nor the moderator have pointed to it.
With regard to the "next, inevitable ice age", I do not know whether or not you are referring to recent reports on Zharkova's conference paper (ably discussed by Sou at Hot Whopper); or to the next glacial (shown to be unlikely with more than 220 ppmv of CO2 in the atmosphere at any time in the next 50 thousand years by Berger and Loutre, 2002; and ably discussed by Sou again). If you would like to clarrify, please at the same time indicate (and post on) the appropriate thread, and attempt a rebutal of the relevant points raised by Sou and/or Berger and Loutre. I will only note that there does indeed appear to be a next, inevitable glacial some 50 thousand years from now; and it would be a great shame if the fossil fuel reserves that it could usefully be used to mitigate that eventuality are used up in the coming century when they harm the human condition rather than in 50 thousand years when they could concievably help.
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MIchael Fitzgerald at 16:45 PM on 14 July 20152015 SkS Weekly Digest #27
PhilippeChantrea,
Your comment is both political (bad regulations vs. bad investment bankers) and OT, but with regard to the precautionary principle, understanding is always better then precaution arising from the unknown. A better understanding prevents costs arising from unnecessary precaution and improving understanding is a key feature of the scientific method. Wouldn't it be a good thing for the world if a better understanding of the climate led to a sensitivity low enough that we didn't have to worry about climate change, except for natural variability like the next, inevitble, ice age?
Moderator Response:[PS] I am inclined to agree that Michael has asked very specific questions so it is preferrable to keep on topic. If someone wants to tackle his "inevitable" ice age, then please do so in appropriate place and post a link here to your comment.
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PhilippeChantreau at 15:58 PM on 14 July 20152015 SkS Weekly Digest #27
Really, this is framing the issue all wrong.
Back in 2007 nobody was seriously questioning whether it was worth the risk to steer the financial and housing market the way the industry was. It wasn't even questioned, except by those who knew better, like Benoit Mandelbrot. The risks existed, and materialized into a trillion dollars (give or take, who cares at this point) of loss to the World economy. In the thick of it, there was no long lines to get soup in street kitchen or scores of homeless people like in 1929. The World has mostly recovered (except for Greece) and it hasn't been 10 years yet. This demonstrated that the US, and World economies could absorb this enormous, catastrophic loss without massive chaos. If it could be done for the sake of Wall-Street clowns gambling with others' money, surely it should be done for the sake of minimizing the immense risk posed by climate change.
Perhaps it will turn out that the science was all wrong; the likelihood of that is a lot less than that of people defaulting on their mortgage. But even if it does turn out to be wrong, it would still be a more defensible expense on the ground of principle than the loss occasioned by the pathetic incompetence of the entire financial industry at the beginning of the century. So why exactly are we quibbling in such excruciating detail about this? Why are our values so messed up? Why are enormous costs acceptable (since very few have gone to jail over the 2008 fiasco) when occasioned by certain unethical behaviors, but unacceptable when motivated by a principle of precaution rooted in science? This skewed cost/benefit analysis does not make any sense.
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ubrew12 at 15:07 PM on 14 July 20152015 SkS Weekly News Roundup: End of the Series
Thank you for all the work of putting together this listing each week, its been a valuable resource. However, we all have to prioritize, its life. We do it and move on. Along with your links above I would also like to share that once a week Mary Ellen Harte (biologist) puts together a blog on 'Huffington Post' called 'Climate Change this week' that is a long news listing, with links, of events that week. Your readers may find it a valuable resource. Also Peter Sinclairs 'Climate Crocks' series should be sampled every few days because its full of useful information. Thanks again!
Moderator Response:[JH] You're welcome and thank you for adding two other resources for our readers to use. As I stated in a prior comment, we are in the process of finding a suitable replacement for the Weekly News Roundup. Stay tuned for further developments.
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MIchael Fitzgerald at 14:16 PM on 14 July 20152015 SkS Weekly Digest #27
MA ROdger,
My interpretation of what divides the two sides is not if AGW is valid, but whether the effect is large enough to justify expensive remediation, small enough to be nothing but a benefit to agriculture, or somewhere in between which brings us back to my original question asking what is the sensitivity as a function of temperature so I can perform a definitive test.The test starts in equilibrium at absolute zero and increases total forcing in 1 W/m^2 steps, allowing the system to stabilize after each step. The resulting change in temperature is the sensitivity to 1 W/m^2 of forcing at the current temperature. From the quantification of sensitivity as a function of temperature, calculate the expected sensitivity at the current temperature and increment the current temperature by that amount. After 239 steps, the resulting temperature must be around 288K at a sensitivity of 0.8C per W/m^2 or else the prediction fails.
We've already established that for a zero feedback/unit gain climate, the sensitivity as a function of temperature is the slope of the Stefan-Boltzmann Law, which at 255K is about 0.3C per W/m^2 and at 288K is about 0.2C per W/m^2. Applying this test to any predicted value of temperature consequential to arbitrary input power unconditionally supports the ideal sensitivity function and serves as the existence proof that quantifying this relationship is not impossible. Starting from this tested quantification for a zero feedback, ideal black body, how does decreasing emissivity (effectively a gray body) and/or increasing the closed loop gain (net effect from feedback and open loop gain) quantifiably modify the underlying physics to support the predicted sensitivity at the required final temperature?
What I say is right or wrong about climatology is irrelevant, only the results from testing its predictions will answer your question about what, if anything, climatology has gotten right or wrong.
Michael
Moderator Response:[PS] Just a note to participants, that list of talks at latest Ringberg workshop on climate sensitivity can be found here.
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MIchael Fitzgerald at 14:14 PM on 14 July 20152015 SkS Weekly Digest #27
I'll remove the response to MA's comment from the preamble, as his comment about evidence of warming was OT anyway.
I also think that this is the more relevant thread, as I'm not claiming any specific sensitivity, high or low, and am just characterizing a test of the sensitivity.
Also, the sensitivity as a function of temperature I'm concerned with is strictly the ECS.
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MIchael Fitzgerald at 12:08 PM on 14 July 20152015 SkS Weekly Digest #27
Moderator.,
My last post seemed to have dissappeared. I can repost it if necessary.
Michael
Moderator Response:[PS] It appears it was deleted for sloganeering (not me). Try again without the preamble. I would also suggest that since you are proposing sensitivity might be low, that an appropriate place to post would "Climate sensitivity is low". (be sure to read the article). To answer the question as to whether climate might be sensitive enough to be damaging, then you need to look at ECS not just the instantaneous change.
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PhilippeChantreau at 02:46 AM on 14 July 2015Climate denial linked to conspiratorial thinking in new study
He would tell you he's part of "a lot of other scientists." Without, of course, getting anywhere near exactly how many is "a lot" and why that des not prevent every major scientific organization in the world to acknowledge AGW and its dangers. It doesn't really matter, since none of this wouldhave any bearing on the validity of his argument, if there was some clearly defined argument there whose validity could be assessed. Oh well...
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jenna at 01:52 AM on 14 July 2015A Hard Deadline: We Must Stop Building New Carbon Infrastructure by 2018
Unfortunately, the exact opposite is happening in the real world, mostly in developing countries. Please see this Vox article about coal infrastucture in the works. Very worrysome!
http://www.vox.com/2015/7/9/8922901/coal-renaissance-numbers
Moderator Response:[PS] Fixed link. Please use the link button in the editor in future.
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Jim Eager at 01:49 AM on 14 July 2015Climate denial linked to conspiratorial thinking in new study
Up thread ryland identified himself as "a scientist with a PhD from the University of Western Australia who rose to become a Professor at Curtin University in Perth" whose "own field of interest, [is] the study of prostate cancer using molecular biological techniques"
Which means ryland's views and pronouncements on climate science are no more valid than any other layman's. He is not even part of the 3%, full stop.
Moderator Response:[PS] It would be preferable to stick to any scientific points that Ryland has raised rather than offering opportunities for further trolling.
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Tom Dayton at 00:00 AM on 14 July 20152015 SkS Weekly News Roundup: End of the Series
Bob, Hot Topic pointed out that Valentina Zharkova in an interview revealed she is a climate change denier. See the transcript near the bottom of Sou's post at HotWhopper. Good explanation of the reality is at And Then There's Physics, especially in the comments. See also Barton Paul Levinson's comments in the comment stream on the Rabbett Run post (but ignore that original post, because as its author says in the comments, it turns out that Zharkova's mention of "activity" means sunspots, not TSI).
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bwilson4web at 23:46 PM on 13 July 20152015 SkS Weekly News Roundup: End of the Series
I fully understand the need to manage one's time but I probably won't be following via Facebook because it is so 'needy' of my attention. It is a Facebook issue that drives me nuts. Still, I appreciate the other three links.
Like mushrooms after a rain, another denialist-lite paper came up on July 9 by Valentina Zharkova on Sun spots. An unfortunate choice of words has been picked up by the usual suspect news sites to claim we're headed towards a 'mini-Ice age.' Sad because the paper probably has merit but poor word-smithing means the misleaders will ride it for all it is worth. <SIGH>
GOOD LUCK!
Bob Wilson
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Tom Dayton at 23:23 PM on 13 July 2015Water vapor is the most powerful greenhouse gas
arationofreason, SkepticalScience's comment threads are for scientific discussion, not repetitions of what "seems logical" to you personally regardless of the science. You started this discussion (rudely and vaguely), apparently without reading the original post of this thread, or at least without addressing any of its points. Several people then gave you more information, which you should have read and responded to, disagreeing if you desired. Instead you ignored all that information and merely re-asserted your personal belief. If you continue that behavior your comments will be deleted. Instead you need to respond specifically to the information you have been given.
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arationofreason at 22:04 PM on 13 July 2015Water vapor is the most powerful greenhouse gas
Moderator, My apology and thank you for your forebarance.
I fully appreciate all of the technical analysis that I have read over the years which shows the incredible complexity of the problem even without the confusion which often arises for people who are not accustomed to working with feedback let alone positive feedback. Yes all of these effects undoubtedly take place at different times and places throughout the atmosphere. I merely wanted to make the point that many are local temporarly and spatially. We may never have the measurements and computing power to untangle the physics with enough accuracy to settle the question and that we should look to nature for the solution.
The 10u window (negative FB ) aside. The only tool left to balance the radiation by NET radiation to space is water vapor. It has done a pretty good job (till now apparently). The only simple point that I was trying to make is that in spite of (local) positive FB effects of increased water vapor, it is the only cooling mechanism there is. As such its NET effect is cooling in response to increased forcing. How else can it keep up with variation in forcing and balance the earths radiation over the eons. It seems logical to me that increased water vapor will add cooling and is thus a net negative climate feedback in spite of all the complexities which are well noted and computed with our understanding of atmospheric physics.
Moderator Response:[PS] This amounts to Argument from Personal Incredulity. Without supporting evidence, this is little better than sloganeering. "It seems logical to me that increased water vapor will add cooling" is an assertion that seems to me to reflect a poor understanding of the physics and should be supported by either data or references if you wish to persuade others of the value of your position.
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Tom Curtis at 13:40 PM on 13 July 2015Water vapor is the most powerful greenhouse gas
aror @207, consider the case where 100% of the IR radiation from the surface is absorbed by WV. If your argument had any validity it would be valid in this case. With an average surface temperature of 288 K, that means on average 390 W/m^2 of radiation will be absorbed by the WV. The energy is thermalized, and the WV rises through convection. As it does do it cools due to adiabatic expansion, with the temperature falling by approximately 6.5 K per Km. Suppose it rises by 2 Km, and then radiates its energy to space. Therefore, it will radiate to space at a temperature of 275 K (on average). At 275 K, the absolute maximum energy it can radiate to space is given by the Stefan-Boltzmann law, and is 324.3 W/m^2. Therefore in this simplified scenario, less energy is radiated to space because of the existence of the WV. As the temperature at altitude is governed by the surface temperature by the adiabatic lapse rate, and as Outgoing Longwave Radiation must equal incoming shortwave radiation to achieve equilibrium, that means the the Water Vapour warms the surface of the Earth. You only manage to think otherwise because you ignore the fact that the WV cools as it rises, and the consequences that has on the energy balance.
In real life, WV does not absorb all of the radiation. Some makes it to space from the surface. Equally, however, much of the radiation is from far higher altitudes than 2 Km. A warming Earth not only increases the WV, thereby reducing the radiation to space due to increased absorption. It also increases the altitude from which, on average, WV radiates to space thereby increasing the temperature differential between radiation from the surface, and radiation from WV, and hence increasing the strength of the greenhouse effect.
Note to the moderator. Last time I responded to aror I was reminded of the comments policy position on inflammatory tone. aror's name is obviously chose to suggest that they have what others lack, ie, that ration of reason. They are suggesting that they are adding a dose of reason to the discussion here that is otherwise lacking. Ignoring the massive irony of that claim given the quality of their posts, that means their name itself violates the provisions agains inflammatory tone. I request that you enforce the policy by requiring them to use a name without invidious implication.
Moderator Response:[PS] Thank you for your positive contribution to the discussion. We do not have policy on pseudonyms to enforce. I thoroughly agree with the irony, but I think that it improves the chances of constructive discussion if we all resist provocation. We will see whether AROR is able to respond in conformance with comments policy.
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Tom Dayton at 12:40 PM on 13 July 2015Water vapor is the most powerful greenhouse gas
arationofreason, you did not ask an actual question, but I'm guessing that you were implying belief that the greenhouse gas effect of water vapor is saturated. If so, you should read the post about the myth of CO2's greenhouse gas effect being saturated, because although the details differ, the principles are the same.
Moderator Response:[PS] Reading an accurate account of GHE eg as done here would help too.
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arationofreason at 11:06 AM on 13 July 2015Water vapor is the most powerful greenhouse gas
Let's see now. IR in intersepted by WV which immediatly thermalizes the energy. The increase in temperature evaporates more WV. Positive feedback in the lowest layers of the boundry layer, so far so good. Then this warmer air and WV convect to condensation altitudes where the heat is radiated away by the WV molecules. We know that this is true since it is the only mechanism by which 3/4 of the earth heat is sent to space. Additional warming by any forcing mechanism allways results in addition WV which compensate by radiating more heat to space. Now you are going to tell me that any increment to the amount of WV is going to cause additional heating. Are you all out of your 'cotton picken' minds? know, it is mind boggeling complex but mother nature worked this out eons ago and it still works. It is the only cooling mechanism that she has. Has she changed it just for you? Or has Michael Moor's suggestion of reversing the laws of physics suddenly taken effec?
Moderator Response:[RH] Please watch the tone of your comments if you want a productive engagement.
[PS]
Please note that posting comments here at SkS is a privilege, not a right. This privilege can and will be rescinded if the posting individual continues to treat adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.
Moderating this site is a tiresome chore, particularly when commentators repeatedly submit offensive or off-topic posts. We really appreciate people's cooperation in abiding by the Comments Policy, which is largely responsible for the quality of this site.
Finally, please understand that moderation policies are not open for discussion. If you find yourself incapable of abiding by these common set of rules that everyone else observes, then a change of venues is in the offing.Please take the time to review the policy and ensure future comments are in full compliance with it. Thanks for your understanding and compliance in this matter.
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sidd at 07:57 AM on 13 July 20152015 SkS Weekly News Roundup: End of the Series
Thanks for the series, and all the other good work. I do appreciate the time and energy expended by the hosts of this site. Unfortunately since the Facebook page seems completely broken without javascript enabled, I doubt I shall visit there.
Moderator Response:[JH] You're welcome.
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ubrew12 at 03:05 AM on 13 July 20152015 SkS Weekly News Roundup #28A
Regarding the article "What will climate be like in 2100? Expect surprises, says new Met Office study", perhaps a similar study could be done in heavily forested areas of N America and Europe to see when these forests are likely to burn. As horrible as losing the forests as lumber would be, it would be worse if they burned due to the black ash deposits and released CO2 exacerbating Climate Change. Perhaps the Climate models could be tasks with giving a likely tipping point at which certain forests are likely to burn. Once those points are surpassed, permission could be given to log them. That way, we give the forest as long as possible to see if our own behavior can be changed in time to save them, but act to prevent 'insult to injury' once those limits are passed. (I'm not really being sarcastic here: it would be better to harvest the trees for construction lumber than have them burn).
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Jonas at 02:53 AM on 13 July 20152015 SkS Weekly News Roundup: End of the Series
I want to tell my gratitude for all the work you did: it was one of the most important items for me here, apart for the other important ones :-) .. Since I do not use facebook, I am also very thankful for your links.
Sks in general does a grat job in providing us small and big non climate scientist multiplicators with information so we can contain the spread of misinformation.
Moderator Response:[JH] You're welcome. I'm adding some new sections to the Weekly Digest to take-up some of the slack. Other new resources may also be added to the SkS website. Stay tuned.
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dcpetterson at 02:19 AM on 13 July 20152015 SkS Weekly News Roundup: End of the Series
Thank you for all the valuable work you do, and all the long hours it requires.
Moderator Response:[JH] You're welcome.
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One Planet Only Forever at 02:10 AM on 13 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
In my previous post "Ayn Rand stlye Libertarianism" is probably a better term for what I am referring to.
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One Planet Only Forever at 01:46 AM on 13 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
In the link offered by Jim Hunt, there are considerations of differentiating people's thinking from a variety of perspectives: Competitive Us vs. Them, Reflective vs Reactive, Liberal vs Conservative.
It is possible that there are value sets or life perspectives that are the real differentiation of the over-confidence and misunderstanding identified by this type of survey. And that people with those characteristics can identify with any of the political groups but have a tendency towards identifying personally with certain political groups, including Liberal and Conservative.
My observations through my life of the people I work with and socialize with, and of what is reported in the News and Magazines seem to indicate that people demanding more freedom to do as they please tend to care less about understanding the potential negative impacts of what they want to do. Their focus is on things like their personal benefit, pleasure, profit, comfort or convenience any way they are able to get away with. And they usually prefer the cheapest way of getting what they want and they want it all if they can get it. And many of them fight against anything that would limit their freedom to get away with things.
The results of that type of attitude are the popularity and profitability of many activities that can be understood to not be able to be done far into the future, and activities that are actually harmful to the ability of humanity to live well in the future.
It would be interesting to see how the results of this type of research questioning would correlate to Ayn Rand style Liberalism in pursuit of maximum personal Happiness or benefit, that is disassociated from the responsibility to understand matters as thoroughly as possible and thoughtfully and considerately limit personal actions to efforts and activities that will develop, or be part of, a lasting better future or everyone.
It would also be interesting to see how a near term monetary and materialistic mind-set correlates to overconfidence and misunderstanding of these types of questions.
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Tom Curtis at 23:28 PM on 12 July 2015In charts: how a revenue neutral carbon tax cuts emissions, creates jobs, grows the economy
dvaytw @37, from this site, it is possible to modify the display to include any or all Canadian territories, and years from 1993 to 2013. I used data from 2000 to get some idea of trends prior to the introduction of the carbon tax, and calculated Canadian minus British Columbia values, and Gross Gasoline Plus Diesel values as follows:
Geography Type of fuel sales 2000-2008 2008-2013 2000-2013 2013 minus 2007 % 2013 minus 2008 %
Canada Net sales of gasoline 363537 400668 328902 1814450 4.58% 2301072 4.63%
Gross sales of gasoline 315306 447665 327742 2054012 5.03% 2406471 5.07%
Net sales of diesel oil 535633 329527 355423 764290 4.46% 1342436 4.62%
Gasoline+Diesel 850939 777192 683165 2818302 4.86% 3748907 4.94%
Net sales of liquefied petroleum gas 1 -17970 9988 -9210 -1388 -0.44% 49759 -0.53%
British Columbia Net sales of gasoline 8405 -35361 -4135 -217599 -4.78% -130448 -4.87%
Gross sales of gasoline 5169 -12609 -3508 -244971 -5.16% -115020 -5.30%
Net sales of diesel oil 59123 82328 53829 348905 19.42% 431485 20.36%
Gasoline+Diesel 64293 69719 50321 103934 1.59% 316465 1.64%
Net sales of liquefied petroleum gas 1 0 0 0 0 #DIV/0! 0 #DIV/0!
Net sales of gasoline 355132 436028 333037 2032049 5.79% 2431520 5.86%
Gross sales of gasoline 310137 460274 331250 2298983 6.37% 2521491 6.41%
Net sales of diesel oil 476510 247199 301594 415385 2.71% 910951 2.80%
Gasoline+Diesel 786647 707473 632844 2714368 5.28% 3432442 5.35%
Can-BC Net sales of liquefied petroleum gas 1 -17970 9988 -9210 -1388 -0.44% 49759 -0.53%Due to formating problems, that is not entirely easy to read, so here are the percentage values of 2013 minus year for gross petroleum (first table) and petroleum plus diesel (second table):
2013 values relative to
Gross Gasoline 2007 2008
Can-BC 6.37% 6.41%
BC -5.16% -5.30%2013 values relative to
Gas+Diesel 2007 2008
Can-BC 5.28% 5.35%
BC 1.59% 1.64%Quite clearly, considering gasoline alone there has been an 11% turnaround in BC due primarilly to the carbon tax. That is more than compensated for by increased diesel sales of approximately 20% relative to 2007/8 levels. Hower, combined gasoline/diesel figures still show that BC has limited the increase in fuel consumption relative to the rest of Canada, with a reduction of about 3.5% relative to rest of Canada figures.
These figures are gross figures. From 2007(2008) to 2013, British Columbia's population increased by 6.8% (5.36%). All else being equal we would have expected a similar increase in petrol and diesel usage. Ergo BC has kept road fuel usage significantly below population growth levels. At the same time there has been a significant increase in GDP, which (all else being equal) would be matched by an equivalent increase in fuel usage:
2007 2008
Can 8.92% 7.65%
BC 9.21% 8.00%Based on GDP, the carbon tax has held road transport fuel use at 6% below expected growth based on economic growth alone. (And please note that BC still out performed Canada in GDP growth over the period, though I make no claims on statistical significance.)
In considering the data above, it should be noted that the articles you refer to discuss only gasoline sales, not gasoline plus diesel. That is appropriate in that the study they criticize also only discussed gasoline sales. Given this, it is astonishing to compare the data values for Gross Gasoline sales for BC with the chart from the Financial Post:
First the data (from 2006-2013):
4719356 4749604 4619653 4646008 4715626 4741085 4682115 4504633
Then the chart:
You will notice that where the chart has gasoline sales increasing sharply from 2011 to 2013, the statcan data shows it sharply decreasing. It also decreases over that period for Gasoline plus Diesel, so this is not a case of using combined data instead of the gasoline only data.
Second, all your sources make the argument that petrol use is price inelastic. That is only true in the short term. In the long term consumers react to increased fuel prices by buying smaller engined, more fuel efficient vehicles, or making more use of public transport. Ergo for a long term price signal, known in advance (such as the carbon tax), we would expect a definite price signal. This is something any competent economist should know.
Finally, for a proper review of British Columbia's carbon tax, may I suggest Murray and Rivers, 2015.
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Tristan at 22:37 PM on 12 July 20152015 SkS Weekly News Roundup: End of the Series
Thanks John, I've greatly enjoyed your efforts x
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Jim Hunt at 22:26 PM on 12 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
Larry - Thanks for your most interesting (to me at least!) research. A pointer to some related work of my own, if I may:
Is Time Running Out for Arctic Sea Ice?
The answer is yes, according to David Barber, Peter Wadhams and others:
The retreat of the sea ice in summer is going much faster than computer models predict, and we think that one factor there is the fact that as the sea ice retreats it opens up this huge area of open water in the Arctic Ocean which then becomes like an ocean, with lots of waves and storms and swell, and the waves themselves break the remaining ice up and cause it to retreat faster so that there’s a kind of collaborative effect there that the remaining ice is vanishing faster because of so much open water producing wave action.
In addition, here's a video I recently recorded concerning the neurophysiology of climate change "skepticism" which you may find interesting:
https://youtu.be/M2nZy6JoI1wAccurate political predictions can be achieved through modelling brain function. This produces a new view of human nature, with biology subservient to the demands of human politics and its shifting coalitions, making our brains hardwired not to be hardwired.
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SirCharles at 22:17 PM on 12 July 20152015 SkS Weekly News Roundup: End of the Series
What a pity. But I see you have more things to do, John. Your newsletter was just a handy weekly update. I'm not on Facebook. So I will be missing something.
Many thanks for all you do and have done, folks. Keep up the high spirit. -
dvaytw at 13:11 PM on 12 July 2015In charts: how a revenue neutral carbon tax cuts emissions, creates jobs, grows the economy
Ps: update-
Maybe I’m just doing a shitty job of Googling, but I can’t confirm the Business Insider’s chart showing that gas use in BC is up to 2008 levels. Here’s what I’m able to find:
http://www.statcan.gc.ca/tables-tableaux/sum-som/l01/cst01/trade37c-eng.htm
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uncletimrob at 07:48 AM on 12 July 20152015 SkS Weekly News Roundup: End of the Series
Thanks John,
I've enjoyed the weekly summaries but it has occurred to me that the time spent in compiling them is immense. I for one appreciate the work that you have put into this site - it has been a wonderful resource for me and my students, and will contiunue to be so.
Tim
Moderator Response:[JH] You're welcome.
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funglestrumpet at 05:15 AM on 12 July 2015Climate denial linked to conspiratorial thinking in new study
I would have thought that discussion about a conspiracy theory that relies on science for its validity by someone who believes in it, yet is far from being a climate change denier, would be ideally suited to the comments section of an item on a science site linking conspiratorial thinking to climate change denial . Sorry for any offence that might have been caused.
Moderator Response:[JH] Your prior comment was deleted because it was argumentative and inflamatory. Make your points in a civil manner and all will go well.
[RH] Lew's paper on conspiracy ideation on climate denial blogs is not license to hash through other conspiracy theories.
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Firgoose at 02:43 AM on 12 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
These results support a common-sense view that we need a mix of approaches to address people with different configurations of knowledge and certainty.
Making it a crime to spread misinformation about AGW would have a huge impact on the situation. Call it "climate terrorism" or something.
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mwsmith12 at 02:19 AM on 12 July 20152015 SkS Weekly News Roundup: End of the Series
The SKS Facebook Page link doesn't go anywhere.
Moderator Response:[JH] Glitch fixed. Thank you for bringing it to our attention.
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Wol at 00:30 AM on 12 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
The most interesting graphs are the first two. They show that (no error bars) even Democrat understanding has gone down during the period. Probably reflecting the ever present misinformation campaigns?
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funglestrumpet at 19:21 PM on 11 July 2015Climate denial linked to conspiratorial thinking in new study
Tom Curtis @ 49
As I point out in my comment, NIST themselves concede that WTC 7 fell at free-fall acceleration for 105 feet. I choose my words with care because at the technical briefing held to discuss their draft report on the collapse of WTC 7 prior to final release they tried to convince the reader that it fell at 40% less than free-fall. It was due to the work of David Chandler that they changed their position. There is video of this meeting found here: https://www.youtube.com/watch?v=f6JN9cwY_OE. Their demeanor is worth noting. As a mechanical engineer (retired) I find it impossible to watch WTC 7 collapse and believe it is anything other than controlled demolition. I am not alone.
Perhaps you should take another look at 9/11, especially the work of AE9/11truth, a group of architects and engineers, and their affiliates, who are waving a big BS flag about 9/11. (Explosive Evidence, Experts Speak Out is particularly informative.) I got the VOM information from Pilots for 9/11 Truth. The aircraft speed is taken from local radar and FDR. When it comes to misinformation, there is a lot involving 9/11 (mini nukes, ufos, directed energy weapons, HARRP etc. the list seems endless.)
Tom, all the truth movement is calling for is a fresh investigation. Considering that Kean and Hamilton, the co-chairs of the 9/11 Commission, state in their book, Without Precedent The Inside Story of the 9/11 Commission, that they believe that "they were set up to fail." Considering just how much influence 9/11 has had on our lives, surely that fact alone should be sufficient to justify another investigation. This time one with power of sub peona and free from external influence, features sadly lacking in the first one.
What worries me about the sks position on conspiracy theories is that it reinforces the MSM meme on the topic. If any site should be countering MSM, it is surely this one. The reason that the public are so ill-informed on climate change is in large part down to them and their misinformation.
Finally, I note that you do not explain how the top 12 floors of WTC 1 fell through the damage zone onto the 92 intact floors below and managed to demolish all of them. You cannot get more fundamental science than Newton, can you? Try watching videos of Verinage demolition for examples of what happens in such circumstances.
(snip)
If sks withdraw this comment, please forward it to Tom.
Moderator Response:[RH] Skeptical Science is definitely not the proper website to engage in WTC/911 conspiracy discussion. Please cease and desist. Further discussion will be deleted. If you have another website where you think it is appropriate to have such a discussion you can post a link so those who are interested can follow you to that location.
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ranyl at 13:52 PM on 11 July 2015Carbon cycle feedbacks and the worst-case greenhouse gas pathway
Thank you RH,
Maybe just delete the conversation about? up to you.
On "NOT" clean energy, I would suggest people look up large scale hydroelectric methane and carbon emissions on going and the effect of dams on the downstream water ways and river deltas.
GHG emissions can be greater than fossil fuels emissions especially in the Tropics,
http://www.nature.com/nclimate/journal/v2/n6/full/nclimate1540.html
And they impact biodiversitry once completed, not to mention the large impacts during construction an dhow much concrete do they need?
http://www.jstor.org/stable/10.1525/bio.2012.62.6.5?seq=1#page_scan_tab_contents
http://freshwaterblog.net/2012/06/11/the-effect-of-dams-on-fish-biodiversity-a-global-view/
And how many dams are CHina building?
Not to mention funded dams in Laos, how many dams are planned in Lao, and Brazil and Chile say?
All with large CO2 emissions, concrete, biodiversity impacts etc, all in the name of "clean" energy, when it should really be called, high GHG emitting, highly biodiversity tottally not clean energy, especially in the Tropical regions.
Moderator Response:[JH] Now you are engaging in one of the favorite games of concern trolls — throwing factoids against the wall to see which ones might stick. Either cease and desist or have your future posts summarily deleted in their entirity. Enough is enough!
[RH] It should be noted that there has been a commenter named "ryland" whom JH has been engaging with for the past week or so. That seems to be causing some confusion with comments from "ranyl." (It definitely influenced my previous misinterpreted reading.) We request everyone's patience while we sort it out.
[JH] I did in fact confuse ranyl with ryland. My sincerest apology to ranyl.
[RH] Links activated.
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Tom Curtis at 10:06 AM on 11 July 2015Climate denial linked to conspiratorial thinking in new study
funglestrumpet @49, quite some time ago I had a look at Truther theories. I found the argument, for example, that a building was collapsing in free fall massively unconvincing given that the video used to prove that "fact" showed large debris that had fallen clear of the dust cloud falling faster than the collapse rate of the building. The bit about the VMO of planes was new to me, so I did a bit of research. Perhaps most interesting was the views of the 911 Truther who suggested a subsidiary conspiracy theory that the VMO arguments were "a possible disinformation campaign to distract the public from the real questions and to discredit our movement in general"; and who then went on to prove that the VMO arguments were a load of bunk.
The fact is that actual conspiracies exist. The CIA, for example, conspire to obtain confidential information from foreign governments. People may have conspired to ruin the reputation of work colleagues. Nixon conspired to eavesdrop on Democratic party campaign strategies. What distinguishes these genuine conspiracies is that they are restricted to a small number of people (necessary for secrecy) and they do not have overly ambitous aims (necessary for success). People who believe in such conspiracies are not called conspiracy theorists, and do not exhibit the irrational argumentation typical of conspiracy theorists. In that way they are distinct from the conspiracies dreamed up by conspiracy theorists - including 911 truthers.
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villabolo at 08:46 AM on 11 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
Magma @1:
"It is not an easy question to answer with confidence even for the knowledgeable..."
My description, which I consider to be high in confidence, is thus:
"When the Arctic ice cap disappears during the summer you will have more evaporation from the exposed water. When that happens there will be more intense rain with flooding."
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L. Hamilton at 08:32 AM on 11 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
@Magma, you're right the Arctic/weather question invites speculation (albeit, a speculation often heard on New Hampshire weather reports), while the sea ice area question is just factual. Oddly though, survey responses to both of them behave as if we'd asked for political opinions.The North Pole, South Pole and sealevel questions on the other hand don't act this way.
In case anyone is interested in seeing the article itself, I should mention that the publisher currently has it freely accessible athttp://www.tandfonline.com/doi/abs/10.1080/1088937X.2015.1051158#.VaBGXvnGAYE
It's my understanding that the Polar Geography paper will go behind a paywall at some later date, perhaps in a month or two.
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longjohn119 at 08:11 AM on 11 July 2015Who knows what about the polar regions? Polar facts in the age of polarization
The Fictional Conservatives, formly known as The NeoCons, aren't going to like this Liberal/Socialist/Communist study.
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ranyl at 06:08 AM on 11 July 2015Carbon cycle feedbacks and the worst-case greenhouse gas pathway
Dear JH moderator,
It was a genral comment of the situation and not intended to inflame anyone.
Was it the terms used? or do you feel that the general press and others (bloggers etc) don't try to dismiss sincere calls about the urgency of these matters by portraying the messengers as "crying wolf" without just cause?
Moderator Response:[RH] I just re-read the comment and my initial interpretation of the comment was that you were saying anyone saying this is urgent is an extremist. I now see you were saying the problem is that people stating urgency get "labeled" an extremist.
Comment reinstated.
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ranyl at 05:15 AM on 11 July 2015Carbon cycle feedbacks and the worst-case greenhouse gas pathway
Dear John.
I don't make the agrument that in practical terms current energy production can be changed to "cleaner" energy sources, of course it can, if you build enough you'll be able to replace current demandand even build on further to accomadate fot population and affleunce increases.
There is no doubt there is the technology available to drive huge amounts of energy from availableresources without using fossil fuels.
I merely point out that all that additional infra-structure and manufacture of the power generating machines will add a significant amount of carbon to the debt and have biodiversity impacts.
If China powered down to their current renewable and present nuclear power generation capacity then that addition to the debt would be prevented.
I do mention it would be sensible to use what we have for the carbon emissions are already in the atmosphere.
How much extra carbon emissions and environmental degradation can we gamble?
All depends on whether you like gambling or not and what perception of risk environmental (global warming, ocean acidification, mass extinction, all proceeding at unprecendented rates comparison to earth's geological and recorded history) change induces within your perception.
Calnifornia's drought is exceptional as is North Koreas, and San Paulo, etc, etc....
However how you see them is almost already formulated by your general opinion on environmental change (urgent, grandchildren'sproblem), your religious and political beleifs and what people arround you suggest is the way to see it.
The drought in Syria was severe, and the Arab Spring report suggests this was linked to the climatic changes occuring in the region and that this lay part of the basis for th einitial civil unrest and eventual civil war.
And then there is nuclear?
Huge carbon emissions up fronts for making new ones and making lead must have environmental impacts and what is safe waste disposal?
If you have a carbon budget to spend (gamble with), where would spend it?
Defences? Building regenerative infra structure (e.g. terracing hills to slow water flow and provide usable growing space), running hospitals? running banks? running governments? until fuel supply truly sustainable and carbon neutral?
1:5 see no risk at all.
Anyone suggesting the problem is so severe the transofrmational change is needed immediately as the problem is here, is stigmatised an alarmist or extremist.
Is there hppe?
Moderator Response:[RH] Inflammatory comment snipped. Comment reinstated.
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