Arguments
Recent Comments
Prev 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 Next
Comments 10151 to 10200:
-
barry17781 at 08:25 AM on 1 August 2019Is Nuclear Energy the Answer?
Mr Sweet
You claim without citation
"An empirical survey of the 674 nuclear power plants that have ever been built showed that private economicmotives never played a role. Instead military interests havealways been the driving force behind their construction"
Please could you explain to me where are Canada's , nuclear weapons obtained from its reactors.
Germany since afrter the war has not been involved in nuclear weapons material.
Then we can add Sweden , The Netherlands, Belgium, Spain etc all to countries that have civilian nuclear power but no intention of weapons production
-
MA Rodger at 07:41 AM on 1 August 2019It's cosmic rays
Aldaron @106,
The Schwarschild equation calculates the amount of radiation transmitted through a medium (like the Earth's atmosphere) when there are substances absorbing/emitting that radiation (as do greenhouse gases). The Schwarschild equation tells us that we will have global warming if we increase the GHG concentrations as the more GHG the higher the emission-into-space altitude and the higher you go (in the troposphere) the colder it gets so the less radiation is emitted into space.
Without reading Fleming's book, the quote you provide seems to be saying just that. The surface is warmed by back radiation (from CO2 & H2O) so an enhanced IR flux travels up from the surface through the atmosphere being absorbed/emitted as it goes. But as it rises through the troposphere, the temperature drops. Thus, according to the Schwarzchild equation, there will indeed be a "failure ... to maintain the CO2 longwave radiation intensity achieved in the surface warming." Thus when the density of GHG increases and the altitude at which this IR flux is transmitted into space rises to higher and colder altitudes, the flux out to space which cools the planet will be of yet lower 'intensity'. Less cooling of the planet so more global warming.
Fleming's book appears a recent publication (June 2019) and a whole 144 pages long covering from 'Chapter 2 - Creation of the Universe' to "Chapter 14 - Future Research on Climate and Energy Issues'. It is either very small writing or a very compact theory being presented. But, hey, why should climate be so complex anyway?
There is also this very day a Heatland pod-caste featuring this same Fleming (25 mins long) than may give some inkling of what is proposed but I couldn't cope with the first 20 seconds that simply comprised lift music.
And I note Google have a reviewable entry of the book so may have a go at reading relevant sections over a cup of tea some time.
But until then my judgement is unchanged. Fleming has misunderstood Schwarzchild.
-
One Planet Only Forever at 07:09 AM on 1 August 20192019 SkS Weekly Climate Change & Global Warming Digest #30
prove we are smart,
Another way of identifying the harmful incorrectness of what has developed is to state that 'sustainable' consumer options should not have to compete with harmful unsustainable actions.
Many harmful unsustainable activities have developed because harmful and unsustainable activity (that everyone cannot develop do) has not been effectively excluded from competing for popularity and profit. And the real kicker is the way that popular and profitable actions develop powerful resistance to correction, not even requiring the unjust Propaganda defending the wealthiest as predicted by the Propaganda Model.
-
One Planet Only Forever at 06:57 AM on 1 August 20192019 SkS Weekly Climate Change & Global Warming Digest #30
prove we are smart @7
It is worth considering that a diversity of vehicle types would be desirable as long as each option was sustainable. The competition would then develop even more sustainable vehicles which could grow the economy by pushing to consume even less material in a fully recyclable way that requires even less energy, and that energy would be sustainable and be produced with ever improved material use.
Advertising (propaganda) creating 'wants and beliefs in stories' that are harmful and unsustainable is a serious problem. The Propaganda Model I mention in my comment @8 applies. Creating dissatisfaction with a form of consumer consumption to encourage a new unsustainable consumption is a very damaging development. The result is more fortunate people tossing away perfectly functional things for a 'shinier newer' but harmfully unsusustainable technical development.
-
MA Rodger at 06:55 AM on 1 August 2019Models are unreliable
rupisnark @1125/1127,
You ask if "the heat content of the Earth rather than the ocean relevant?" The short answer is neither of them as a 'total' heat content. The change in ocean heat content is relevant as this is by far the biggest thermal lag holding back global warming and a measure of it gives the easiest measure of the global energy imbalance. Note the change in Ocean Heat Content doesn't relate usefully to 'total' ocean heat content.
But we haven't really the first idea about what Christy is measuring in his talk with the 750M & 6T. Let us assume it is some or other total heat content (down to absolute zero) in joules per square metre of surface and then divided by 3.4 (for his '100 unit' measure although those 'units' are an energy flux not an energy content). It is then as I set out @1119 with the total heat capacity of the atmosphere roughly (mind these are seriously back-of-a-fag-packet-type calculation) equal to 750M. An equivalent value for the oceans would be 80x too small for the 6T value and the planet weighs 4,400x the oceans and is perhaps 10X as hot so the 6T would then be something like (44,000/80 =) 550x too big.
@1125 you asked if such a total heat capacity of the entire Earth was relevant to the climate system. A heat capacity for the atmosphere is relevant because the best part of the atmosphere will be warmed pretty-much by the same amount as any surface temperature increase. This is not the case for the oceans. The ocean depths will warm very little relative to the surface and even in the ocean surface mixed layer there will be less warming than at the surface. And the bulk of the planet is very well thermally insulated from climate with the sort of temperature increase that would be catastrophuic at the surface unable to make any significant difference to the temperature gradient through the Earth's crust.
These figures of Christy's, whatever they ar meant to be, should not be presented in the manner Christy does. They are nought but nonsense eye-candy. Bad Christy!!
-
scaddenp at 06:43 AM on 1 August 2019It's cosmic rays
People with half-baked ideas on physics that they learnt of wikipedia confusing other people who would desparately like to be comforted about their predjudices. This is nonsense and directly contradicted by observations. If observations contradict what someone would expect from accepted theory, especially if not formally taught, then chances are it is the persons understanding of the theory not the theory itself that is wrong. Books on Amazon tell you how many suckers are out there. Dozens of peer-reviewed papers would be another story.
-
One Planet Only Forever at 06:33 AM on 1 August 20192019 SkS Weekly Climate Change & Global Warming Digest #30
nigelj@5,
My point is that the majority of the more fortunate need to be leading by setting helpful sustainable examples for every one else to aspire to achieve and improve on (be even better than). That majority would effectively correct and penalize any peer who failed to care to help set the required example.
The more fortunate people investing in unsustainable pursuits of profit from harmful unsustainable actions by others is almost worse than themselves being the harmful consumers. So a lot of correction of perceptions is required primarily by the most fortunate since the most fortunate are the most powerful influence on the stories that get told and the perceptions that are developed.
Edward Herman presented the Propaganda Model in 1988, with some assistance from Noam Chomsky, in "Manufacturing Consent". That explanation of how free market forces result in media fairly powerfully promoting the lintersts of the wealthy status quo has been show to continue to be valid today even though many things about media have changed. And it important to understand that the propaganda they evalaute happens through news, advertising, TV show, movies and even fashion magazines and things like the flak attacks on any presentation of understanding that would challenge the desired stories that support defend or excuse the powerful wealthy status quo.
The way that improved awareness and understanding of climate science struggles to be popular and is unjustly challenged is a powerful case proving the legitimacy of Herman's Propaganda Model.
-
Eclectic at 06:20 AM on 1 August 2019Models are unreliable
Rupisnark, thank you for that reply. But you still ought to make clear your thinking re "entire earth" ~ for it is (IMO) difficult for readers to understand the central thrust of the ideas being put forward, where brevity and possible ambiguities impede the communication.
Brevity is the soul of wit. But not always the soul of clear & transparent communication. Perhaps you are not meaning to: but in the present case you seem to be giving the impression that you are striving at "the Hot Spot gnat" while disregarding the main substance i.e. the overall context.
-
rupisnark at 05:47 AM on 1 August 2019Models are unreliable
Eclectic @1126
Sorry, all I was trying to do was get a response to my post @1120 where the point refering to the 6tr has not been answered (and I presumed the answer would have been a simple one). Obviously the Ocean Heat Content is important, the question is looking at the effect of that vs the heat content of the entire Earth.
If Christy were correct about the high altitude atmosphere of the tropical zone it would lead a reasonable person to believe that changes may need to be made to climate models and to understading of what is going on overall.
Moderator Response:[PS] Questions about the "hot spot" should be addressed here. See also comments and papers here. Good review of controversy here. Basically Christy's methodology is inadequate for observation he is claiming whereas hotspots shows as per model in better methods. Further confirmation in recent works (eg here). Christy is practising on the unwary and is notably absent from addressing the issues raised in the peer-reviewed literature as far as I am aware. Any further discussion should be on thread indicated.
-
Eclectic at 05:45 AM on 1 August 2019'No doubt left' about scientific consensus on global warming, say experts
Sam-qc @13 ,
what do you consider the Uberto Crescenti's important points which you think might require answer or rebuttal? It would save much time for readers, if you would pick out 2 or 3 of his points which (maybe) disprove the mainstream climate science.
The OISM petition was a laughable travesty. But I (and probably most people) haven't seen the Italian (or English translation) petition you mention. It doesn't appear to be making worldwide headlines in the news (as one would think it ought to deserve, if it truly overthrows modern science).
-
Eclectic at 05:23 AM on 1 August 2019Models are unreliable
Rupisnark @1125 ,
I would be grateful if you would clarify your first paragraph. Specifically: "Is the heat content of the earth rather than the ocean relevant?"
Possibly you were aiming to cut corners, to shorten your post. But the effect is both extraordinary and ambiguous. ~What do you mean by "the heat content of the earth" as opposed to the concept of OHC (Ocean Heat Content) ? Are you referring to totality of radioactive molten core & mantle etc., or referring to surface rocks/soil ocean and air . . . or some subcomponent?
The relevance of the OHC is so hugely important to climate, that, in comparison the tropical tropospheric Hot Spot [per radiosonde measurements, rather weaker than many climate models had projected] is verging on triviality in the overall context of AGW.
Almost needless to say, the climate models' crucial aim is to predict/project future climate (as it affects our biosphere) of land, ocean, and lower troposphere ~ and "not so much" the 200-300mB high altitude atmosphere of the tropical zone (as Dr Christy seems to focus on).
-
Sam-qc at 05:11 AM on 1 August 2019'No doubt left' about scientific consensus on global warming, say experts
Are you aware of any answer or rebuttal for Uberto Crescenti and his fellow italian scientists declaration ? Would you treat it as was done with the OISM petition?
This seems to be the original post, but many english translations are suggested on climate skeptiks sites. I assume it is fairly easy to find.
http://www.opinione.it/cultura/2019/06/19/redazione_riscaldamento-globale-antropico-clima-inquinamento-uberto-crescenti-antonino-zichichi/?altTemplate=Stampa&fbclid=IwAR1YAoqulAKKXJTY-uzRfSEaX-G6NRpVOckp3nVE7iiTAgOQu8DMHGUxRnE
-
Aldaron at 02:50 AM on 1 August 2019It's cosmic rays
In his recent book, Rex J. Fleming asserts that "CO2 has no impact on climate change", or, as he summarizes on his website:
There are now over a dozen books available on Amazon.com that point out the various fallacies of the CO2 climate theory – but none of these have zeroed in on the heart of the issue – the failure of the Schwarzschild radiation integrations to maintain the CO2 longwave radiation intensity achieved in the surface warming by H2O and CO2. The resultant Planck radiation intensity is severely depleted in the upper atmosphere. The result is the CO2 molecules merely pass their remaining small residual heat to space un-impeded. CO2 has no impact on climate change.
This claim seems to contradict some basic physics.
Is Fleming correct that the "failure of the Schwarzschild radiation integrations to maintain the CO2 longwave radiation intensity" means that "CO2 has no impact on climate change"?
-
rupisnark at 23:43 PM on 31 July 2019Models are unreliable
MA Rodgers @1121
Thank you for your post. The second part of which was useful.
On the first part, the reason I keep up questions is to try to pin down the areas of disagreement. From that point it is possible to proceed. The fact that you will not clarify certain points raises to progress the discussion when I expected that you could have put to bed the issue is slightly concerning. Is the heat content of the Earth rather than the ocean relevant?
So if you could please respond to all my points raised in @1120 Re response to @1117, I would be grateful.♣ We cannot use the surface temperature, because the surface temperature record was used in the development of the model.
->Whatever else Christy says he and McKitrick are right on this point. In numerous fields I have seen models developed based on past data which were no more than data mining. Once inspected the models and they are often nonsense. If this is what the climate models are doing, then they have a long way to go before they can be relied on to make sensible predictions.
The 4 general conditions laid out in McKitrick & Christy in the introduction seem sensible. Would any of the 102 climate models pass them?
♣ (The actual abilities through the decades of the various models at projecting GAST is briefly reviewed by CarbonBrief.)
->This link does not appear to work.
♣ And Christy in not addressing uncertainty plus other failings is considered by this 2016 post at RealClimate.)
->This is an excellent post. Very helpful and can be understood in 5 minutes. The graphs he generates give a very good picture of how wide the potential disagreement would be, (if it weren’t for the other potential issues you have made about Christy's argument).
-> One thing that neither side of the “debate” see is that people on the other side genuinely believe what they are saying is true and do not believe they are being influenced by issues such as their reputation and previous statements/papers, financial incentives (whether big oil money or academic research grants) or peer pressure. As an example, issue (2) is the sort of thing that many people on both sides of this debate might do inadvertently to save time or deliberately to strengthen their arguments. If doing inadvertently and the result went the other way to the way they wanted, they may well notice the issue and correct it.
♣ See this SkS post of 2009.
->This will need a few re-reads as not as well written as the Real Climate post.
♣ And the "tropical hotspot" isn't a marker of AGW but of warming generally.
-> Just to be clear, is it or isn’t it a prediction of the 102 warming models? [Perhaps on the third reading of the SkS 2009 it will be clear to me – Apologies if I missed something obvious but at second reading it appears to be saying that the hotspot is NOT the key marker, but that the models do predict it].Does the following summarise the position correctly?
1) Tropical hotspots are said to NOT be a signature of AGW (as opposed to global warming generally) BUT they occur in the output of most/all of the climate models.
2) There is some uncertainty as to whether the hotspots exist, although the majority of the evidence suggests they do.
3) If the hotspots do not exist, then climate models will need to be refined, possibly need a greater re-work. (This does not mean their outputs are completely wrong)
♣ His choice coincides with the long contentious "tropical hotspot" which has been argued over for decades.
->Isn’t the period Christy has chosen a little longer than this? [Again, happy to be shown to be wrong]
♣ Christy attempts to use the uncooperative "tropical hotspot" as some sort of essential failing of CMIP5 models and by implication as an essential failing of all models. As set out above, such attempts are poorly contrived and to-date even a corrected argument is far from unconvincing.
->From what I have seen so far (a long way to proper understanding), his argument while not totally convincing is not entirely without merit. -
michael sweet at 21:33 PM on 31 July 2019Is Nuclear Energy the Answer?
A recent report from the DIW (a German economic reaserch institution) foound that nuclear plants are not economic. From the abstract:
" An empirical survey of the 674 nuclear power
plants that have ever been built showed that private economic
motives never played a role. Instead military interests have
always been the driving force behind their construction. Even
ignoring the expense of dismantling nuclear power plants and
the long-term storage of nuclear waste, private economy-only
investment in nuclear power plant would result in high losses—
an average of five billion euros per nuclear power plant, as one
financial simulation revealed. In countries such as China and
Russia, where nuclear power plants are still being built, private
investment does not play a role either. Nuclear power is too
expensive and dangerous; therefore it should not be part of
the climate-friendly energy mix of the future" my ephasisNuclear plants are not economic.
-
prove we are smart at 18:36 PM on 31 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
Seeing this is my first comment, may i congratulate the people behind this webpage. I finally feel emboldened to challenge some of the anti agw / climate change people i mix with..Here in Australia, the election is over and in one state all the candidates were agreeing to open a new coal mine. The issue was jobs in a low employment area.If you were against it you were never in the race. Human nature will have to change and quickly, education, media concensus and to slow down growth,so we use less. With the standard of the political leaders here and worldwide, pushing their own agendas, or not facing reality, or are they playing the only tune the people want to hear?. You just have to see a whole aisle of toothpaste choices or another with pet food choices to realise the craziness in our lives. When i see car ads on tv i often think there is the very symptom of whats wrong, to me there should only be 5 models. The city car, the people mover, the sports, the 4wd/suv and the trades van/ute. You can pick colours or a few other custom features but all made by one or two companies and made to last with simple features. Will people go without electric adjustable seats, electric mirrors,heated seats adnausium? It will take a suicidal politician to close the car plants, the coal mines, and what ever wasteful indulgence the consumer driven western world provides. ..Now to finish on a positive, i hope some clever people can gear up to use the disenfranchised workers to now produce the solar or wind or perhaps any of the clean energy we are to need.
-
Philippe Chantreau at 12:14 PM on 31 July 2019Climate's changed before
About the "2 sides of athe argument" thing: there is really no such thing when considering all the aspects of climate science studied, the weight of the evidence leaves no doubt. I remember a video clip by James Hansen in which he expressed the problem in the simplest possible visualization: imagine a square meter of the Earth, put a little candle on it, close to one watt of output. Seems like a very little thing. Now put one on every square meter of the planet's surface: every square meter of every ocean, every square meter of the Arctic, Antarctic, every square meter of every city, and of every desert, every square meter of the mountains, plains, every single square meter of the surface of our home planet. This is so staggeringly enormous that it defies the imagination. We humans are not well equipped to think about tis kind of thing and prioritize our other silly preoccupations down.
-
Philippe Chantreau at 11:41 AM on 31 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
Thanks for picking up on the Sutherland et al paper, it didn't elicit much response in the thread when I initially mentioned it. The findings, however, are nothing short of astounding: 2 orders of magnitude! I hope there is some follow up research.
-
Bob Loblaw at 11:31 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
As for surface changes, one of the earliest papers I know of is:
Anthropogenic Albedo Changes and the Earth's ClimateBy Carl Sagan, Owen B. Toon, James B. Pollack
Science21 Dec 1979 : 1363-1368
Link to origfinal source is here:
https://science.sciencemag.org/content/206/4425/1363
but the full text requires an account. Google Scholar will point you to freely-available copies.
Short version: climatologists have been aware that surface changes can affect climate for at least 40 years.
P.S. Don't forget to look at the IPPC 1990 report, too...
-
Bob Loblaw at 11:26 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
For a less intense introduction to climate change, I often suggest the first IPCC report from 1990. It covers a lot more basics that are simply assumed in later reports.
https://www.ipcc.ch/report/ar1/wg1/
In the contents of the Executive Summary, the first section lists:
What factors determine global climate?
What natural factors are important?
How do we know that the natural greenhouse effect is real?
How might human activities change global climate?
In the main table of contents, Chapter 1 is titled "Greehouse gases and Aerosols". It covers five specific gases, plus ozone and related trace gases, and then aerosols.
Chapter 2 is titled "Radiative Forcing of Climate". Its sections cover greenhouse gases, solar radiation, direct aerosol effects, indirect aerosol effects, and surface characteristics.
So much for the idea that the IPCC does not consider other factors besides fossil fuel emissions. This is so easy to look up.
-
Daniel Bailey at 09:15 AM on 31 July 2019Climate's changed before
For my small contributions, you are most welcome.
"i have looked at a lot of evidence from both sides of the argument"
If only there were actual sides. Because that would imply that both "sides" were roughly equal.
In the discussions around global warming and its anthropogenic causation, there are those who focus on the science using the scientific method and logic, seeking reproducible evidence that best explains what we can empirically measure. We call them scientists, the real skeptics.
Then there is everyone in the extremely small but vocal minority, those who ignore the above in favor of slander, innuendo, unsupported assertion and character assassination in favor of promulgating false equivalence to support the ephemeral facade of "debate" and "sides".
But it is not about the science, the bulk of the science was settled, decades ago. Deniers posing as skeptics set up a charade tableau of false equivalence to poison the well of public acceptance of that science.
A parsimonious harping at the font of stolen, out-of-context and context-less emails proven not germane to the science is continuing on in the prosecution of the agenda of denial.
Truth, science and reputable journalism all sacrificed to the unholy alter of false equivalence under the guise of promulgating a fallacious "debate".
There is no debate. All that remains is the informed and the uninformed.
Those professing the false equivalence of "both sides" are the journalist in this story.
Moral, dear readers: Don't be that journalist.
The discussion surrounding the science of climate change and its human-causation are a Möbius strip comprised of 170 years of evidence from hundreds of thousands of scientists from virtually every country on the planet. Meaning that from an evidence perspective, only one side exists, because only one side uses evidence.
Even the petroleum extraction companies researched the subject themselves and affirm the unassailable facts, physics and evidence of AGW.
Per the oil companies, which admitted it in court, under oath:
"The issue is not over science. All parties agree that fossil fuels have led to global warming and ocean rise and will continue to do so, and that eventually the navigable waters of the United States will intrude upon Oakland and San Francisco. "
The People of the State of California vs BP PLC et al (page 6, line 6).
-
nigelj at 08:39 AM on 31 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
OPOF @3, yes upper middle class and rich people could be called over consumers, often owning multiple cars and televisions, and having huge homes etc so some scope definitely exists for them to reduce consumption. I should have mentioned that, but didn't really have time.
I fall into that upper middle class category, and I choose to live reasonably modestly in terms of consumption. Similar to you in fact. However Im not prepared to live like a pauper, and we are nibbling away at the edges of the problem.
The rich also have most of their wealth invested or its on loaned to other people, so their over consumption of material resources is just their immediate posessions. This is a significant factor, but its the consumption of other classes of people which is largest. Virtually everyone owns basic technology and uses transport of some sort and the impacts add up, so the scope for working classes and lower middle classes to reduce consumpotion is limited. So population is a huge part of the issue and potential solution.
-
Daniel Bailey at 08:29 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
"all that concrete and pavement absorbs the sun rays, creating a giant heat sink"
While urban areas are undoubtedly warmer than surrounding rural areas, this has had little to no impact on warming trends.
"The Urban Heat Island effect is real. Berkeley’s analysis focused on the question of whether this effect biases the global land average. Our UHI paper analyzing this indicates that the urban heat island effect on our global estimate of land temperatures is indistinguishable from zero."
http://berkeleyearth.org/faq/#question-15
"Time series of the Earth’s average land temperature are estimated using the Berkeley Earth methodology applied to the full dataset and the rural subset; the difference of these is consistent with no urban heating effect over the period 1950 to 2010"
http://static.berkeleyearth.org/papers/UHI-GIGS-1-104.pdf
For more info:
https://skepticalscience.com/urban-heat-island-effect-intermediate.htm
-
nigelj at 08:13 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
Hoipolloi.., cities are indeed absorbing some solar energy, but they are less than 0.1% of the earths area, so its just not enough energy to account for the vast warming seen in the oceans for example. This is basic stuff to calculate, and is not reliant on computer modelling.
-
william5331 at 07:38 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
Have you ever tried to argue a creationist out of his point of view. The most extreme case of cognitive dissonance I have come accross is a geologist I met who was a creationist and argued that a 500 plus series of gravel, sand, clay, gravel sand clay was the result of the great bibical flood. It is the same with climate change deniers. No amount of evidence short of a total disastrous flip of the climate is likely to convince them. The real problem, though, stoping effective action is the financial support of politicians by vested interest. Sort this one out and we will begin to gain traction on all the things we must do to avoid a disaster.
-
scaddenp at 07:19 AM on 31 July 2019Models are unreliable
Strange comment. Models predict that climate is changing fast so I dont see how rapid change makes them wrong. However, no climate modellers is claiming that models are 100% accurate. Not even close. They have no skill at decadal level prediction but do at climate (30 year average) level. Climate sensitivity estimates are still too wide for comfort (2-4.5), however, they remain the best tools we have for predicting further climate.
-
Rob Honeycutt at 04:45 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
Hoipolloi... I get the idea that you've never read the IPCC reports because they most certainly do not claim that FF's are the "sole reason" for climate change. There are extensive sections on urbanization and deforestation as well as dozens of other related issues, including changes in solar forcing, volcanic influences, etc, etc.
You also seem to be under the mistaken assumption that the IPCC does computer modeling. They don't. The IPCC only does a report on all the published science related to climate change. The science cuts across a very wide range of fields of research and their purposes is to pull all that disperate information together into a single report.
My suggestion for you would be to spend at least an hour purusing through the IPCC reports. I don't even need to post a link. They're very easy to find and they've updated the website to make the reports very easy to navigate.
Have fun!
-
Hoipolloi at 03:43 AM on 31 July 2019'No doubt left' about scientific consensus on global warming, say experts
Even if you believe in catastrophic climate change, no mention is made of the basis for this "consensus." Antropogenic warming of the earth may well be happening but for different reasons than what the IPCC would have us believe........
The Intergovernmental Panel on Climate Change (IPCC) would have us believe that fossil fuel emissions are the sole reason for climate change. But what about urbanization and deforestation? A study by the UN Department of Economic and Social Affairs states that the urban population rose from 750 million in 1950 to 4.2 billion in 2018. We don’t need the IPCC’S hugely complex computer models to know that cities are hotter. All we have to do is walk from a paved sun-heated street lined with concrete buildings to a grassy park. Rather than reflecting the sun’s rays back to outer space, all that concrete and pavement absorbs the sun rays, creating a giant heat sink. Likewise, deforestation is turning vast tracts of cool African and South American jungles into heat- absorbing barrens. The U. S. EPA summarizes the combined effect, “Processes such as deforestation and urbanization … contribute to changes in climate.” Trying to deal with any problem without considering all possible causes is both a foolish and dangerous strategy.
Moderator Response:[DB] At Skeptical Science, the onus is on each person posting (in this case, you) to be able to support their statements and assertions with citations to the credible literature. Please read the Comments Policy and construct future comments to comport more fully with it.
"Trying to deal with any problem without considering all possible causes is both a foolish and dangerous strategy"Scientists already have. Scientists have evaluated all natural forcings and factors capable of driving the Earth's climate to change and it is only when the anthropogenic forcing is included that the observed warming can be explained.
Natural vs Anthropogenic Climate Forcings, per the NCA4, Volume 2:
Changes in the sun's output falling on the Earth from 1750-2011 are about 0.05 Watts/meter squared.
By comparison, human activities from 1750-2011 warm the Earth by about 2.83 Watts/meter squared (AR5, WG1, Chapter 8, section 8.3.2, p. 676).
Sloganeering and fake terms snipped.
-
One Planet Only Forever at 03:23 AM on 31 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
Another way to respond to concerns about total population is to point out that 'population' and climate change impacts are both included in the comprehensive Sustainable Development Goals. And all of the SDGs need to be achieved and improved on. And because of the lack of correction of the incorrect directions of development that have occurred, not just powerful resistance to climate change impact corrections, some developed perceptions of wealth or superiority relative to others will have to be given up to correct what has incorrectly developed.
The coal barons of today are poorer than they were thought to be. The same fate will need to be forced on the oil barons, the natural gas barons, and all the other pursuers of perceptions of superiority relative to others whose actions are not developing sustainable improvements for the future of humanity. Those people cannot all be expected to sacrifice their harmful and unsustainable pursuits of perceptions of success and superiority. In many cases the rule of law will have to be developed in ways that effectively correct them, just as it has developed to limit other harmful unsustainable human activities.
This also means the typical person will also have to be 'externally' encouraged to behave better, meaning having responsible leadership take actions like imposing carbon fees to correct their behavior.
Anyone wanting to believe that their developed perceptions of prosperity 'must be preserved' is destined to be disappointed (the future of humanity does have to win, the sooner the better), but those resisting correction will regrettably be able to be harmful until facing that deserved corrective disappointment.
Global understanding that needs to be developed for sustainable development to happen is that everyone's actions can impact the future of humanity, and everyone is a part of global humanity and are only free to do as they please if what pleases them helps develop a sustainable improvement of the future of humanity. Tribalism is fine Within That Limit. However, diversity of people within that limit needs to be encouraged (acceptance of that diversity is another required correction that some people resist and they can be seen to partner up politically with those who want to powerfully resist the economic corrections that climate science has exposed are required - resisting improved understanding and resisting the related corrections of developed perceptions that are required to achieve sustainable development beneficial to the future of humanity is what they have in common).
-
One Planet Only Forever at 02:37 AM on 31 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
The proper description of the concern is this sustainability of how humans are living and whether sustainable improvements are being developed.
And the undeniable understanding based on abductive reasoning in pursuit of the best explanation of what is going on is that competition for perceptions of superiority relative to others with popularity and profit as measures of merit has developed unsustainable human activity that is detrimental to the future of humanity and has developed powerful resistance to correction.
Growth of the total population is a concern. But the real concern is the total impacts of the total population. And everyone should be expected to aspire to being deserving of merit and living like the perceived leaders/winners.
With that understanding it is clear that the problem is the example being set by the perceived winners. The developed competitions are rewarding unsustainable and harmful behavior.
What is required is for the winners to be required to be proven to be deserving based on the helpfulness and sustainability of that helpfulness to the future if humanity. What is currently developed as methods of evaluating the merit of actions, and the people doing the actions, is failing to properly determine what is deserving of merit (popularity or profit).
The growth of consumption and harmful results of human actions is what needs to be curtailed, not just the growth of the population. And the highest consuming and highest impacting people are what needs to be targeted for correction. Reducing total population while allowing total consumption and impact to continue to grow is No Solution.
The developed ways of living of the highest impacting and consuming among the more fortunate today can only be understood as harmfully unsustainable. Significant incorrect overdevelopment has occurred. Correcting it is challenging. It requires people to accept a sacrifice of their developed perceptions of merit and ways of living.
It would be nice if sustainable alternatives existed that were as easy and cheap for those benefiting from them as the currently developed activity is. But that is not likely a reality. That is likely a tragic fantasy.
As for what I do. I drive as little as possible and drive a hybrid (because the power generation in Alberta is so bad that there is more impact from an all electric than there is from a hybrid, lots of coal burning to produce the electricity). I also consume very little that is not food or water. I also seek out Fair Trade goods or sustainably produced goods.
-
MA Rodger at 01:18 AM on 31 July 2019Greenland is gaining ice
Molsen @40,
You say that "it seems that a little more than 99.99 per cent of it does not melt in even a bad year." That is actually wrong. It is about 99.93% that annually "does not melt." The ice sheet averages something like 1,500m in depth and the melt is about 1m of that. What you appear to ignore is the annual +800mm precipitation of snowfall which must be added to the net Ice Mass figures to give the total annual melt.
However, I will assume you are interested in net Ice Mass as that has been your interest up-thread and that would be roughly equal annually to 0.01% of the total ice mass. The statistical significance of the net ice loss is not in any way dependent on the total mass of ice suffering the loss. Rather it is a matter of whether the measurement of Ice Mass is noisy enough that the negative trend could be purely a product of the noise. This can be determined statistically.
In the case of the GRACE data of total Greenland Ice Mass graphed repeatedly on this web-page, the negative trend is a long long way from being statistically insignificance. A quick linear regression through the data with the annaul cycle removed (2003-2015, the data which was readily available) gave a trend of -273.4Gt/yr +/-7.3Gt/yr(2sd). So the Confidence interval would be -266 to -281, all a long way from zero.
-
Rob Honeycutt at 23:46 PM on 30 July 2019'No doubt left' about scientific consensus on global warming, say experts
Kuidaskassikaeb... This would just be yet another hockey stick. The first hockey stick was done by Mann, Bradley and Hughes back in 1998/99. It was merely a collection of local and regional temperature data series all combined that stretched back over the past 1000 years to show the changes in global temperature. Since then there have been lots of newer studies with refinements and the same answer comes back: human activities are rapidly warming the planet. And all that is merely a confirmation for what scientists already expected going back through 100+ years of science.
-
SirCharles at 23:32 PM on 30 July 2019'No doubt left' about scientific consensus on global warming, say experts
http://journals.sagepub.com/doi/abs/10.1177/0270467617707079?journalCode=bsta
-
Kuidaskassikaeb at 23:26 PM on 30 July 2019'No doubt left' about scientific consensus on global warming, say experts
This is just a question. How is this different from the famous hocky stick?
-
richieb1234 at 23:18 PM on 30 July 2019How could global warming accelerate if CO2 is 'logarithmic'?
MA Rodger: Great stuff! Thanks
-
Evan at 23:01 PM on 30 July 2019'No doubt left' about scientific consensus on global warming, say experts
"This paper should finally stop climate change deniers claiming that the recent observed coherent global warming is part of a natural climate cycle."
I doubt this will silence the critics. When have credible facts ever guided POTUS? I expect the only thing that will move the deniers is evidence outside their windows.
But hopefully it will move some of the fence sitters into greener pastures.
-
MA Rodger at 22:56 PM on 30 July 2019Climate's changed before
TVC15 @770,
Well, let that be a lesson for you!!
Denialism isn't logical. It turns folk into swivel-eyed loons.To correct his nonsense-
♣ It was 3 million years ago (not 2) that North & South America collided and joined up, a process that did kick off the Arctic glaciation which then resulted in c3 million years of ice ages. And over tha last 1 million years the ice ages were significantly bigger. Presumably the present warming that is bringing this 3-million-year-period to an end can be blamed on the collision of the USSR and the Republic of China with the United States of America, these all constituting significantly large land masses.
♣ You probaly could argue the Arctic was ice-free 100,000 years ago but only through the peak of the summer melt season (as in the Arctic Ocean having the levels of summer ice we would declare today to be ice-free).
♣ 15,000 years ago we were still coming out of the last ice age. We were out nearer 10,000 years ago (as the graphed ice core data clearly shows).
♣ The extreme global temperature changes since the Last Glacial Maximum were nothing like "10-15 degrees C" except at a regional level (ie Greenland). And the period over which these increases occurred (the data graphed shows two large sudden Greenland increases in the last 20,000 years - +12ºC at 14.5kybp & +9ºC at 11.5kypb - which were not 10-year periods of increase but 200-year periods. I don't think the ice cap volumes exist in the northern hemisphere to achieve a repeat performance today.
♣ The relative temperature of different interglacials has been discussed in this thread before and so we know the swivel-eyed loon is having difficulty hearing this particular message. So, yes, we do think he is "just being crazy" and that craziness is why he has such difficulty accepting the science and its implications.
♣ With regard to emisions controls, we can, of course, treat all people on Earth equally as the denialist wishes. The science says that anthropogenic CO2 emissions of more than 700Gt(C) will be bad and with 7.7 billion folk living on the planet, that would be an allowance of 91t(C) per head(historical) ('historical' as your allowance-use is handed down from previous generations).
So let's calculate that allowance using Global Carbon Project figures and present-day population. Note these GCP territorial emission data only go back to 1959. Getting full historical figures would be possible (& correcting for increasing population could be factored in) but the general result will not change. That would mean that China still had an outstanding carbon allowance of 54t(C) per head, India 82t(C)/head while the good old USA has exceded its allowance and so has to pay back 238t(C)/head into the collective kitty. If full historical emissions were included, the US pay-back would be greater still, not qute as great as the UK pay-back if taken to the beginning of the Industrial Revolution. (From 1959 the UK pay-back is a trifling 47t(C)/head). Luxembourg from 1959 has a pay-bacl 0f 199t(C)/head but would be the country facing the biggest carbon-emissions pay-back with full historic figures.Denial is a sad thing to behold. Denialist folk become happy to dismiss the evidence witout any assessment of what they are ignoring. It is simply done. "The IPCC assessment reports? A complete pack of lies!!"
More telling is the misuse of the remiaining information that you do accept. As you are ignoring whole swathes of actual data, your sources tend to be limited and adjusting the findings beyond that limited evidence becomes a necessity. So some, no all previous ice ages were warmer, golly, 10 degrees warmer, 20, 100 degrees warmer. We should be grateful we live now and not then!!!!
And how does the following rate on the scale of untruthfulness given it comes from a real climatologist, abet a retired one. It's from Lindzen's seminar at the UK House of Commons in 2012. (@ 32.20mins in the first videoed part of his talk linked here. (You-tube link here)"Does it [20th century temperature increase] matter?"
"Okay so some points to take away from the global mean temperature anomaly record. Changes are small. They are in the order of several tenths of a degree. Changes are not causal but rather the residue of regional changes. Changes in the order of several tenths of a degree are always present at virtually all time-scales. And obsessing on the details of this record is more akin to a spectator sport or tea-leaf reading than a serious contributor to scientific efforts."
"Say, at least so far. I mean if some day I shoud see the changes are twenty times what I've seen so far, that would be certainly remarkable but nothing so far looks that way."
The implication is that we have here a retired climatologist who considers a gobal average temperature increase of less than (0.7 x 20=) 14ºC to be unremarkable. Are we then supposed to take such a retired climatologist as a serious authority on climate?
What perhaps we cannot judge is how much a denier knows he is misrepresenting the data he presents, that he is effectively lying. I suppose gross exageration can be justified because the denialist message is to them the correct message and, and denialists don't have the resources to counter all the lies that you climate alarmists generate with all your fake IPCC science.
-
Molsen at 22:27 PM on 30 July 2019Greenland is gaining ice
To clarify: is the percentage that melts (i.e., the 0.01 per cent - at worst -statistically different from zero?
Moderator Response:[DB] Annual losses from the Greenland Ice Sheet are 286 Gt/year. Pretty statistically significant, even relative to the Empire State Building:
-
Molsen at 21:56 PM on 30 July 2019Greenland is gaining ice
Given the total volume of ice in the Greenland ice sheet, it seems that a little more than 99.99 per cent of it does not melt in even a bad year. Is that statistically significant from zero?
-
Eclectic at 20:39 PM on 30 July 2019In 1982, Exxon accurately predicted global warming
MsG @15 ,
If you seek some audiovisual presentations, then you may like the Youtube videos by Potholer54 (a science journalist by the name of Hadfield). Excerpts permissible, I'm sure !
Informative & often amusing & encouraging of critical thinking. The videos now number 50 (fifty!) but are mostly short (though some over 20 minutes).
Potholer54 avoids political partisanship, and is careful to give facts based on the scientific papers published in reputable peer-reviewed journals i.e. based on the actual science. Many of his videos are given with a humorous facet or two ~ which is (IMO) bound to appeal to you and your students.
Always , always , he emphasizes the importance of careful critical thinking wherever one encounters "facts" / information / hysteria / blogs / newspaper articles . . . and the need always to check the sources, find the original sources and evaluate their reliability, and be skeptical of the headlines.
# Be careful with the numerical label of each video ~ Youtube nowadays numbers the videos 1 - 50 , but the main video screen prominently displays an older numerical notation.
All are worth seeing (as fresh info for the climate science novice, and as humorous chuckles for the climate Old Hands . . . especially the five videos under the Monckton Bunkum heading ! )
If I may suggest a few :-
the 1st : "1- Climate Change - the scientific debate" [ 10 minutes]
the 23rd : "21- "Earth facing a mini-ice age!" [ 6 minutes]
the 25th : "23- Medieval Warm Period - fact vs. fiction" [ 20 minutes]
the 28th : "26- Science vs. the Feelies" [ 16 minutes]
the 29th : "27- The evidence for climate change WITHOUT computer models" [ 16 minutes]
the 31st : "28- The consequences of climate change (in our lifetimes)" [ 18 minutes]
the 40th : "A conservative solution to climate change - part 2" [ 21 min]
(The videos range in date from about 2009 'til 2019. None obsolete ! )
-
michael sweet at 19:34 PM on 30 July 2019In 1982, Exxon accurately predicted global warming
MsG,
You should have a section on Greta Thunberg. She is the same age as your students. She is the most successful climate campainer in the world. Perhaps your students will want to start a group to support her or school strike on Fridays.
When I taught AP Chemistry I used several data sites to introduce AGW. If you want to use denier information you will only confuse your students, they cannot evaluate data very well. Most are familiar with the denier side since Exxxon's propaganda arm is so strong. If you choose to use denier data I think you should view this sketch from John Oliver first:
I find that students like to see the data themselves and did not care about what I thought. I used the NSIDC web site for the retreat of Arctic Sea Ice. The minimum is around September 15 and the NSIDC October report around October 5 will cover sea ice in detail. It is written at a level AP students can read. This year is very low. If you look at the NSIDC site the first week of school you can follow to see what the final result will be.
The NOAA annual climate report (2018 linked) describes the global temperature. They have a USA only report and have monthly reports also. I only used the annual reports. The annual report comes out around January 15. I like this graph linked at the start of their global report: There is a similar US only graph.
It is possible to find data for the city you live in but that data is often very noisy and hard to interpret.
My students did not like the IPCC reports because they wanted to only see US data. The Fourth National Climate Report, issued by the Trump Admministration, has many sections that describe most of the expected affects already measured and expected in the USA. I recommend you focus on this report since it is so authorative and is USA based. Since this report is so long you could make your unit as long or short as you like by reading more of it. I had students choose a section and write a report on the affects expected for the area they were most interested in.
All of these data sets are accepted by everyone. There is no need to offer the "other side" since only one set of data exists. If you view the Michals video you will only be indoctrinating vunerable students with false propaganda. Perhaps at the very end of your unit you could view it and point out his mistakes. Time how long you view it and only give 1% of your time to it (the scientific consensus is now 99% and not 97% so more than 1% for deniers means you are pushing their points). There is not really a denier position, they all disagree with each other and change their arguments every sentence to suit the wind.
Ask here for more information. If you describe in more detail what you want we can be more specific in reply.
-
MA Rodger at 18:46 PM on 30 July 2019How could global warming accelerate if CO2 is 'logarithmic'?
richieb1234 @13,
It's an interesting thought. Although for me the answer below doesn't really need calculating, let's do it.The forcing from a doubling of CO2 is 3.7Wm*-2, enough to raise a body at a theoretical temperature of 255K by 1K. This then kicks off feedbacks that raise the temperatures by something like a further 2K. For sake of argument, let us assume this ECS=1K+2K = 3K.
We know that a further doubling of CO2 will require twice as much CO2 as the first doubling and that will raise that theoretical body from the double-CO2's 258K, but by a little less than 1K due to the S-B fourth-power relationship. So theoretically it would be 0.966K or 3.4% less than the first doubling.
And if we went for a third doubling to raise that theoretical body from the quadruple-CO2's 261K, the CO2 would provide a further 3.7Wm^-2 of forcing** and raise temperatures by a theoretical 0.933K or 6.7% less than the first doubling. And compounded with the reduced second doubling, that would amount to 10% less warming over the third doubling or an average reduction of 4.5% over all three doublings. But with global temperatures now +9ºC and the uncertainty with ECS=3K (It could well be significantly higher through three doublings), I would be surprised if a 10% discount for being such a loyal customer of CO2-powered AGW is going to feature in anybody's decision making.[** With a third doubling, CO2 atmospheric levels would be reaching 2,200ppm so now well above the 1,300ppm that my memory tells me is the top of the range over which the logarithmic relationship should be used. The forcing relationship then increases somewhat due to the compound CO2 absorption band at 10 microns starting to kick in.]
-
MsGteacher at 17:06 PM on 30 July 2019In 1982, Exxon accurately predicted global warming
Hi fellow posters :)
I wonder if you might help me find respected resources on the topic of global warming. I know this is a huge ask and I know I can Google, but I have collected a plethora of resources and want to make sure I'm not missing something obvious/recent.
My dilemma is that I teach an AP English course to 17-year-old students. I want my opening unit to be focused on whether or not global warming is happening in 2019. My goal is to always give students both sides (I have NASA data to compare with a Fox News interview with Patrick Michals from the Koch-funded Cato Institute). I try, hard as it is, to step aside and have students think critically and ask Socratic-type questions of one another during class to provote "out of the box" thinking while remaining open to changing their opinion (which is often related to what their parents have fed them).
I truly appreciate any help in advance in terms of guidance toward resoures, videos, documentaries, etc. that show BOTH sides of this issue and are easily digestable by young minds and not scientists with PhDs.
Fun fact: I wrote an 80-page research paper in 1997 about the effects of global warming on our world's forests. I went to university in San Francisco, so it was a topic that was heavily discussed back then in our college classes. Crazy to think, 20+ years later, I am a lot like Exxon...we both knew decades ago.
-
tjarlz at 15:29 PM on 30 July 20192019 SkS Weekly Climate Change & Global Warming Digest #30
Yes, I have been wondering about this too. If people in the global north decided to reduce their consumption to meet planetary boundaries, then how much expenditure would that represent per annum (based on a notional basket of goods/services)? What would people do with the(ir) surplus "unspendable" income? Would we all work less? Would the economy be able to adapt?
-
emmawilliam11 at 15:17 PM on 30 July 2019Models are unreliable
the climate is changing very fast, so these models can not be 100% accurate.
-
richieb1234 at 11:06 AM on 30 July 2019How could global warming accelerate if CO2 is 'logarithmic'?
scaddenp - Thank you. I think your response to my comment would be a good addition to the article, because I am probably not the only reader who wondered about how Stephan-Boltzmann fits into the picture.
-
TVC15 at 09:12 AM on 30 July 2019Climate's changed before
Thank you, scaddenp, Daniel Bailey and MA Rodger!
I'm with scaddeep's statement: "If someone isnt prepared to let data inform their opinion, then it isnt worth arguing".
I realize how utterly useless my efforts are in trying to help the "deniers" understand the science that supports human caused climate change.
I have learned so much from you all when I post the denier claims. I thoroughly appreciate the responses as you provide me with insights that I would not have been able to discover myself.
However I've grown tired of dealing with the deniers. If they can't understand what they are seeing all over the globe right now as I type this there is no amount of science that will open up their minds.
Here is just another sample of the type of denier minds out there.
i have looked at a lot of evidence from both sides of the argument, and i dont need someone to tell me what my conclusions should be. and there is PLENTY of geological evidence that this round of warming is nothing more than a natural event, one that had been going on for the last 2 million years, ever since the north and south american continents collided. 100,000 years ago the arctic was ice free. and as has been noted many times by many people in many ways, here are a few truths you need to take into account;
1: we are out of the last period of glaciation by only 15,000 years roughly
2: the AGW crowd is complaining about an increase of 1 degree C over 150 years, but there is geological evidence that 15,000 years ago the temperature went up by something more like 10-15 degrees C in TEN years.(i didnt know there are that many SUVs back then, who knew?)
3: we are still ten degrees COOLER than at this same time during the last intergalciation period, and the one before that, and the one before that for the last 2 million years. and its funny how the AGW crowd FAILS to take into account previous interglaciation periods, and what was NATURAL warming.
and if you think that i am just being crazy, then why is the IPCC scientists solution always more regulations and more taxes and redistributing the wealth of the developed nations to those nations that are still developing? and why is it that all the so called climate change protocols penalize the developed nations, mostly western europe and the US, and ignore the rest of the world? why is china given a pass, along with india? two of the highest CO2 emitters in the world?
if the AGW message was more consistent, and required ALL countries to stick to the climate change protocols, then perhaps their message might be more acceptable, and more people might actually listen to them.
in the end these protocols are nothing more than a way for the UN to control the worlds population, and to work to usher in one world government with the UN running things, and no national sovereignty of any kind.now you claim i am a science denier, but that isnt the truth here. i suppose you also consider the science settled, and that is NEVER the case. the science is NEVER settled, except in the case of the closed minded, non scientific lemmings.
I see no point in spinning my wheels on a mind such this.
-
scaddenp at 08:31 AM on 30 July 2019How could global warming accelerate if CO2 is 'logarithmic'?
richieb1234 - while the Stephan-Boltzmann law gives you relation between radiative power to 4 power of temperate (so the doubling CO2 would raise temp by 1.1C), it is less useful than you might think for estimating actual surface temperature. You cannot raise (or lower) temperature without other feedbacks coming in. These operate on very wide timescales from very fast (water vapour increase), through decadal scale of albedo change from less ice, to century/millenia feedbacks in carbon cycle. Add in the complexity of cloud feedbacks (both +ve and -ve), and you get the wide range of estimates on climate sensitivity.
-
richieb1234 at 05:56 AM on 30 July 2019How could global warming accelerate if CO2 is 'logarithmic'?
This is such a good article. I keep coming back to it. If there is one thing that might improve it, I might suggest a discussion of the mathematical relationship between forcing function and temperature. If I remember my Physics correctly, radiative energy goes as the fourth power of temperature. So a small temperature change can make up for a relatively large deficit in radiative energy. Whether or not I am right about that, it would be interesting to see a discussion of that relationship.
-
knaugle at 03:55 AM on 30 July 20192019 SkS Weekly Climate Change & Global Warming News Roundup #30
This may interest you. It's a story of the effect of "Dzud winters" on the nomadic lives of people in the Mongolian Steppes. Climate change appears to have hit them hard.
Prev 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 Next
