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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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Comments 105251 to 105300:

  1. Geological Society discuss climate change evidence from the geological record
    thingadonta - can I recommend Zeebe et al 2009 and its cites? Getting rates out of geological records is indeed difficult but the high-res Walvis ridge record would suggest <5000 years and maybe <1000 years. I cannot see how you can conclude that this means rate in past infer no danger now. In past in might be assumed that CO2 feedback raised temperatures slowly because the feedback cycle is slow (not for PETM however), but the important bit is how high did temperature go. If it went 6 degrees in 1000 year for same size pulse, then getting 6 degrees in 200 years is going to be a whole lot worse. Note that CO2 injection was 'fast' as was the temperature rise - as you would expect from the physics. Note too, contrary to what you state, that the ocean chemistry change was exceedingly fast - it is the ocean chemistry change that is marker after all. I'd say the record was on the contrary warning that you can produce very fast change. You can infer that from basic physics and chemistry as well. While the article might raise some questions for you, you will see that published science it is based on does not have the holes you infer. For instance, the source of CO2 is inferred from stable isotopes - its not from natural marine cycle. PETM has some major mysteries - what caused the depleted-O13 CO2 injection and how it was sustained. However, the effects of such a change of ocean chemistry, biodiversity and global climate are no mystery at all - they merely confirm what physics and chemistry would predict.
  2. What should we do about climate change?
    #281:"decline in CO2 emissions starting in 1979" EIA data for international CO2 only goes back to 1980, but the US data show that CO2 emissions fell as early as '74-75. That was a direct consequence of the Arab oil embargo after the 1973 war. Oddly enough, France's CO2 emissions have slightly increased since 1990; during this 20 year period, your IEA graphic shows that their nuclear power grew by about half. Just a thought, in view of Barry's Brook's comment: Since the AGW deniersphere doesn't find CO2 to be a problem and they tend to worship the fossil fuel industry, what are their opinions on the nuclear future you propose? Are pro-nuclear folks hammering away at them with as much vigor as we've seen here?
  3. What should we do about climate change?
    At the same time they are forcing governments to waste extraordinary amounts of money and national wealth on subsidising renewables. - Peter Lang How do they force governments to waste money?. And why do fossil fuel subsidies keep getting conveniently neglected when discussing subsidies?.
  4. What should we do about climate change?
    CBDunkerson @265, ” This in response to a post (#238) wherein I advocated the use of nuclear power; "However, the most logical course is a mix of energy sources... wind, solar, hydro, geothermal, nuclear, et cetera. Each where they are most accepted and practical." It is simply impossible to have a rational discussion with someone who CONSTANTLY makes false statements about the very content of the dialog. Your advocacy of nuclear power is SO combative and SO irrationally over the top that you actually manage to turn OTHER advocates of nuclear power off it.” OK. I get your point (and others have made the same point). I’ll try to clear it up once and for all, and then let’s stop winging about how I argue the case I am trying to put. My impression is that the anti-nuclear and renewable advocates have dominated energy policy for the past 40 odd years. And their dominance is increasing not decreasing. To support this statement I point out that all the so called environmental NGOs are strongly anti-nuclear and strongly pro-renewables. They want nuclear banned, and/or they want to apply so many impediments to it that it is not competitive. At the same time they are forcing governments to waste extraordinary amounts of money and national wealth on subsidising renewables. For no significant benefit. That is the political and policy environment we are in. My position is I want to see an economically rational level playing field. I also believe 40 years of damge has to be recovered and society will have to pay to correct the massive mistake it has made. So, yes, society in the western democracies will have to take the necessary steps, including some subsidies to nuclear until it can be competitive again in the western democracies. The precedent has been set with the massive subsidies we’ve paid to renewables, so arguing this case should not be opposed. My position is we need a level playing field for the selection of electricity generation technologies. We should define our requirements and then establish a fair and balanced regulatory regime for all technologies on an equal basis. If renewables can do the job, that is great. That is my position regarding how the technologies should be selected for each new generating opportunity. This it is an extension and improvement to the Australian Energy Market Operator’s “Statement of Opportunities” . On a different track, I consider what technologies are best able (now and in the forseeable future) to meet what I believe are our requirements. From what I know: 1. coal generates about 80% of Australia’s electricity. Baseload amounts to about 75% of our electricity consumption. 2. Nulcear is best able to replace coal and meet our requirements for baseload electricity. 3. Nuclear and pumped hydro could meet all our requirements now. That would provide very low emissions electricity, and at the least cost (if we removed the impediments). 4. Solar and wind cannot provide baseload power. They are unlikely to be able to for a very long time, if ever. I doubt solar will ever be viable for baselod generation. 5. We are wasting enormous amounts of our wealth chasing the renewable dream. 6. I support a mix of technologies as long as it is economically rational 7. I expect an economically rational mix of technologies to generate electricity to meet the requirements of the Australian National Electricity Market (NEM) would comprise something like: 80% nuclear and pumped hydro, 5% hydro, 15% wind and biomass (if we could implement it now). 8. I am not sure about the 15% wind and biomass; I may be being generous. Anything more than this I believe would be irrational. That is my advocacy for a mix of technologies. I agree with you. However, I suspect you are advocating a much higher proportion of renewables than I am just because you want them and don’t like nuclear. I also suspect you want the government to mandate the higher proportion and to subsidise it, just because you believe in it. If so, I hope you will now be prepared to argue the case on a rational basis.
  5. Geological Society discuss climate change evidence from the geological record
    A couple of points about the Geological Society of London Statement. On page 4 it states there was a 'sudden' warming event 55Ma. 'Sudden' is a very ambiguous word in geological terms. The paper doesn't give a rate of what this warming was, but it does give a rough rate of time for the Earth to recover-100,000 years. The rate of warming could have been about as slow/fast, which would mean there would be no danger to human societies from current C02 emissions. They also state on page 5 that the rate of increase in C02 55Ma and also in the Jurassic 183Ma whuch lead to 'abrupt' warming, was about the same as current human c02 emission rates. 'Abrupt' is another ambiguous term in geological terms. Again, they nowhere state what the actual rate of 'abrupt' or 'slow' warming was, 55Ma and 183 Ma. If it occured over tens of thousands of years, as some research papers have indicated, there is no danger from 'similar' rates of human c0o2 emissions. The paper mentions the abrupt shift in climate in Greenland in ht epast, but this was not from c02 emissions. They mention that both the reducing c02 in the atmosphere and changes in ocean circulation patterns around Antartica drove cooler temperatures over the last 50 Ma. They don't however delineate which is the more important, but do note eleswhere that c02 follows coean circulation patterns, and does not drive them. So C02 drawdown in the last 50 Ma may have had very little effect on the growth of Antarctic Ice, but rather simply follows cooler ocean temperatures. The amount of positive feedback from c02 is not stated. Also: They nowhere mention aspects of the geological reord that do not fit the paradigm that human c02 causes rapid, onoing (little/no negative feedback) climate change. They nowhere mention that ocean chemistry changes in the geological record took up to tens of thousands of years during 'similar' rates of c02 emissions at 55ma and 183 Ma that they say are occuring by humans now, meanning there is no danger of human c02 emissions causing major rapid ocean acidification on human timescales. They nowhere mention that as oceans cool or warm, they release c02 as a function of c02 solubility with temperature. This means they haven't differentiated how much c02 follows temperature changes, and how much is causes temperature changes. They only note a correlation, and implicitly assume c02 is main driver of temperature, and not the other way round. Correlation is not causation, but they fail to mention this key aspect entirely. Too many holes in the paper to take seriously, and as a geologist, I am disheartened by their level of bias towards AGW, whilst not addressing the weaknesses in the science.
  6. What should we do about climate change?
    #279 muoncounter You can see the timeline for the deployment of NPPs in France here: Electricity generation by fuel: France The decline in CO2 emissions starting in 1979 looks highly correlated with the NPP deployment over a couple of decades. The IEA electricity generation by fuel charts for most countries are available here: http://www.iea.org/stats/index.asp
  7. What should we do about climate change?
    Barry Brook wrote : "But if other people have other motivations, so what? Great, in fact! Common ground here is key. For instance, if a particular political party like the US Republicans love nuclear power, but are dismissive of climate change, then let's embrace the energy synergy and have them support climate action in an indirect way. We're not going to get anywhere by demanding absolutism, and your comment on there being no grey area is therefore dangerously misguided." I wonder where you would draw the line at such a devil-may-care attitude ? Is it OK for Iran to embrace that "energy synergy" ?
  8. Geological Society discuss climate change evidence from the geological record
    Great post btw
  9. Geological Society discuss climate change evidence from the geological record
    Start stopwatch.... How long til someone posts "paleo data is unreliable" "too many uncertainties..." Ho hum.
  10. What should we do about climate change?
    #278: "France’s CO2 emissions per capita changed from trending up to trending down in the 1970’s, which happens to be when the rate of commissioning new nuclear power plants accelerated." Just about everybody's CO2 emissions dropped in the late 70's and early 80's due to the Arab oil embargo. Too soon to be due to France's switch to nuclear, which began as a result of those oil price shocks: The present situation is due to the French government deciding in 1974, just after the first oil shock, to expand rapidly the country's nuclear power capacity.
  11. What should we do about climate change?
    Dear Ann, @263 you asked: ” ”Peter: The point I am making is that if we allow clean electricity to be cheap, it will displace oil for transport and gas for heating and, therefore, reduce emissions from all fossil fuel use. “ I completely understand the point you are making. I am asking you to provide proof that your hypothesis is correct: If we provide enough cheap energy (e.g. nuclear), that it will automatically make mankind turn away from fossil fuel (even with fossil fuel still available in substantial amounts). Until now, reality proves otherwise (see France and see worldwide CO2 emissions). What makes you think it will be different in the future ?” Good question. I hope the following will address your question. The source of the data used below is IEA http://www.iea.org/co2highlights/ Download the Excel file. I’ve compared the CO2 emissions per capita and per GDP for France and Germany. These two countries are industrialised, have similar standard of living, climate, population density, vehicles, transport, road distances etc and they share the same electricity grid. I am sure you can find differences, but are they significant? If so, please quantify how much difference they make to the conclusions I draw below. Item France Germany Fr/Ge Nuclear proportion of electricity generation 76% 23% 3.28 kg CO2 per capita (total energy) 5,743 9,789 0.59 kg CO2 per capita (electricity and heat ) 792 4,107 0.19 kg CO2/GDP US$ (exchange rate) 0.24 0.38 0.63 kg CO2/GDP US$ (PPP*) 0.29 0.59 0.49 population (million) 64.1 82.1 0.78 * PPP = purchasing power parity Comparing France with Germany, we can see France has: - three times higher proportion of electricity generated by nuclear - 59% the CO2 emissions per capita from all domestic energy consumption - 19% the CO2 emissions per capita from electricity and heat generation - 49% the CO2 emissions per GDP US$ (exchange rate) - 78% the CO2 emissions per GDP US$ (PPP) Conclusion: France, with three times higher proportion of electricity generated by nuclear, has much lower CO2 emissions than Germany’s on every measure - and five times lower from electricity and heat generation. It is clear, that the high proportion of nuclear is the reason for France’s low emissions. It is also interesting that France’s ratio of emissions from electricity to emissions from heat (mostly gas) is much higher than in Germany. Item France Germany Fr/Ge GWh/person (consumption) 7275 6400 1.14 TJ/person (consumption) 2456 5317 0.46 France emits 14% more CO2 per capita from electricity than Germany, but emits only about 46% as much CO2 per capita from heat generation. In France, electricity has displaced fossil fuels for heating to a greater extent than in Germany. As electricity becomes cheaper, the displacement of fossil fuels by electricity will be become faster (Economics 101). Therefore, if we want low emissions electricity to replace fossil fuels (world wide not just in the developing countries), then we need to make low emissions electricity as cheap as possible, not raise its cost. This chart compares the trend in per capita emissions of Australia, France and Germany from 1960 to 2006 I draw the following conclusions: 1. France’s CO2 emissions per capita changed from trending up to trending down in the 1970’s, which happens to be when the rate of commissioning new nuclear power plants accelerated. 2. Australia’s emissions per capita have continued to trend up and levelled off about 1998. We have no nuclear power. To me it is clear. We need low cost, low emissions electricity, and we need to implement it as fast as possible to displace fossil fuel energy use. The main focus must be on providing low cost clean electricity for the developing world. We must lead the way in the developed countries and develop and prove the technologies to meet that requirement. We must focus of providing low cost clean electricity. Raising the cost of clean electricity is exactly the wrong policy. I agree we should regulate emissions but not as the first step. The first step must be to remove the impediments to a level playing field for all electricity generators. We need to remove the impediments to nuclear. If we don’t do that we’ll paper over the issue and leave many of the imposts in place, and they will never be removed. That, of course, is exactly what the anti-nukes are striving for. Nuclear will remain far more costly than it should be. So the roll-out of low emission electricity generation will be slower. The reduction in world emissions will be slower. That is all economics 101. The sort of impediments and regulatory distortions to the market that are blocking nuclear in Australia are: 1. nuclear power is prohibited 2. high investor risk premium because of the politics 3. Renewable Energy Targets 4. Renewable Energy Certificates 5. Feed in Tariffs for renewables 6. Subsidies and tax advantages for renewable energy 7. Subsidies and tax advantages for fossil fuel electricity generators 8. subsidies for transmission and grid enhancements to support renewable energy 9. massive funding for research into renewable energy 10. massive subsidies for research into carbon capture and storage (CCS) 11. Guarantees that the government will carry the risk for any leakage from CCS 12. No equivalent guarantee for management of once-used-nuclear-fuel 13. Massive subsidies and government facilitation for the gas industry, coal seam gas and coal to gas industries (despite the latter leaking toxic chemicals into the ground water and the Great Artesian Basin water) 14. Fast tracking of the approvals process for wind power, solar power, gas industry, coal industry while nuclear industry remains banned from even fair comparative studies by Treasury, Productivity Commission, ABARE, Department of Climate change and more. We can just imagine what the approvals process would be like for a nuclear power plant!
  12. What should we do about climate change?
    Daniel Bailey said:
    Let there be no mistake on this: there exists no play, no grey area, no middle ground; either you acknowledge the science and CO2's role in the warming we empirically see, or you don't. Black and white. It doesn't make you an advocate of AGW in the same sense that you advocate for NPP's. But it will either restore some needed credibility to you, or take it away completely should you disavow it.
    This is a strange position to take. Of course climate change is a strong motivation for society to eliminate its dependence on fossil fuels. But if other people have other motivations, so what? Great, in fact! Common ground here is key. For instance, if a particular political party like the US Republicans love nuclear power, but are dismissive of climate change, then let's embrace the energy synergy and have them support climate action in an indirect way. We're not going to get anywhere by demanding absolutism, and your comment on there being no grey area is therefore dangerously misguided.
  13. What should we do about climate change?
    BP - solar PV is expensive, no doubt about it. However commercial solar power either uses concentrators on panel, or more commonly solar thermal for electricity production, which is much, much cheaper. A blanket "solar energy is not economically viable" is false. Do you object to the idea that all subsidies on fossil fuels should be dropped for starters so we have a level playing field.
  14. What should we do about climate change?
    #271 Peter Hogarth Here is an interesting development in fast reactors: "The idea of constructing a prototype Prism small modular reactor at the US Department of Energy's (DoE's) Savannah River site in South Carolina is to be jointly explored by GE-Hitachi Nuclear Energy (GEH) and Savannah River Nuclear Solutions (SRNS). "As part of a proposed demonstration of small reactor technologies that could take place at Savannah River, GEH and SNRS (partnership between Fluor, Northrop Grumman and Honeywell) signed a memorandum of understanding to consider the Prism design (Power Reactor Innovative Small Module)." Prototype Prism proposed for Savannah River
  15. What should we do about climate change?
    In other words, solar energy is not economically viable at all. For government support is not for free, it is financed by tax money. So the logical extension of this line of thinking is that fossil fuels, which are heavily subsidized, are not economically viable either.
  16. gallopingcamel at 10:29 AM on 3 November 2010
    What should we do about climate change?
    Berenyi Peter, I am planning a trip to Florida Power & Light to look at their 75 MW PV plant and their solar plant that is a co-generation source to a conventional plant. I am hoping to learn something about the economics of such projects in this very favorable location. Until you build something on a reasonably large scale it is hard to be sure what the true operating costs are. I am hoping to get some insights on details such as how much cleaning the PVs or mirrors need. You are right (as usual) about my home PV project. It almost makes sense when the government subsidy is taken into account so I am wavering about going ahead with it given that the price FP&L will pay me is not guaranteed. What happened in Spain could happen here.
  17. The Grumble in the Jungle
    The supposedly omitted citations - per Nepstad, who had no acknowledged hand in drafting the IPCC report chapter - do not support the claims made in the IPCC passage "In sum, the IPCC statement on the Amazon was correct." - Daniel Nepstad Could it be any clearer?
  18. gallopingcamel at 10:07 AM on 3 November 2010
    What should we do about climate change?
    Daniel Bailey, (#267) I have read hundreds of posts by Peter Lang on other blogs, so I am mystified by some of your comments in #267. He may be as dedicated a member of the CAGW choir as you. Even NPP nuts like me are not advocating 100% nuclear. I like hydro even more and wind too where it makes economic sense. The trouble with renewables is that they are hard to scale up to take care of even today's demand for electricity. Fossil fuels fill the gap and will continue to do so until a technology that is both cost effective and scalable is available. With regard to reducing CO2 emissions I appear to be in agreement with the majority on this blog so I advocate NPPs as a way to reduce the dominance of fossil fueled power plants in most countries (France being the notable exception). Even if people like me fail to persuade you, it will not matter in the long run. Once the fossil fuels have been consumed the huge reserves of fission fuels will not be left in the ground.
  19. What should we do about climate change?
    quokka at 00:38 AM on 3 November, 2010 I am talking about current build and immediate (20-30 yr) planned build. The MIT report is realistic (though the contributors have vested interest). Several decades worth of standard "single cycle" or open cycle fuel use are envisaged. This is the view of the EU and bodies such as the EIA. Gen III reactor operational lifetime is expected to be ~60 yrs with build over next 30 yrs (and many commercial reactors are already running way past their design life). IAEA quote from 2007: "At the end of 2006, world uranium production (39,603 tons) provided about 60% of world reactor requirements (66,500 tons) for the 435 commercial nuclear reactors in operation. The gap between production and requirements was made up by secondary sources drawn from government and commercial inventories (such as the dismantling of over 12,000 nuclear warheads and the re-enrichment of uranium tails). Most secondary resources are now in decline and the gap will increasingly need to be closed by new production. Given the long lead time typically required to bring new resources into production, uranium supply shortfalls could develop if production facilities are not implemented in a timely manner." The latest industry "red book" from 2009 highlights an extra 15% new ore discoveries and gives slightly more than 100 yrs of economically viable reserves at 2008 consumption rates. Various industry 2010 estimates vary from 75 to 100 yrs. More resource will be discovered, and some new mines have opened recently (not pretty at all) but exploration, ore and processing costs have dramatically increased. Let us suggest consumption doubles as China, India and others build new reactors through the next 50 yrs to displace coal... A solution: Gen IV closed cycle (breeder), or Thorium?: MIT report estimates 50 to 100 yrs to move to new technologies. There are many issues to be solved. As with some of the more significant projected climate changes, I am concerned about and interested in what's next, even if I may not be around to see it. Whilst there is much idealism and glossing over on both sides here (renewables/nuclear), many governments are meanwhile pragmatically planning significant investments in both.
  20. The Grumble in the Jungle
    Dear Rob The supposedly omitted citations - per Nepstad, who had no acknowledged hand in drafting the IPCC report chapter - do not support the claims made in the IPCC passage. Nepstad 1994, 1999 and 2004 are peer-reviewed, no doubt - the issue at hand is however not that.
  21. Berényi Péter at 08:43 AM on 3 November 2010
    What should we do about climate change?
    Consider this Solar panel profitability page. Conclusion: in order to make solar panels a viable option, we need government support. In other words, solar energy is not economically viable at all. For government support is not for free, it is financed by tax money. That is, in order to be able to provide an incentive, more tax should be collected. If this money is subtracted from the profit made on installing solar panels, the net result is still negative. We should clearly wait until both cost of solar panels would approach that of ordinary roof tile and temporary energy storage gets affordable. Until that time all the money should go into honest R+D and none of it into fake projects.
  22. The Grumble in the Jungle
    Shub @11 - your comment doesn't make sense. The omitted citations, supporting the WWF document & the IPCC claim, are peer-reviewed literature. Nepstad was the lead author on those studies mentioned above.
  23. Hockey stick or hockey league?
    #17: "The Northern Hemisphere 'land' temperature chart exaggerates the temperature increase, a global chart which includes the oceans " Or to put it the other way, the NH land chart is the temp increase of concern in the immediate term; the oceans have large thermal inertia that will respond in time. "The pattern emerging from this award winning blog is a regurgitation pattern. " And why not? The denials are mostly repetition; the rebuttals just keep on working. Case in point: relative to AD1750 - radiative cooling at AD2005 is estimated at ... Haven't we heard that before?
  24. Hockey stick or hockey league?
    KL - "why not...". Because the point of "hockey stick" reconstructions is not to show correlation but to compare temperature observations to model predictions. Its not a correlating trends that we are interested in but whether past temperatures match predictions from model forcings within the error limits of both.
  25. What should we do about climate change?
    ATTN: 3drchase I had a magic wand, I would wave it over your head and transport you to Wnnipeg Can when it is about -30 deg C in the wintertime. As I metioned, hockey practice for the small kids starts at 5 or 6 AM. If you live in Can, you aren't going to ride bicycle to practice when the streets and land are covered with snow and temp is in the -teens below 0 deg C. BTW I live in Metro Vancouver. The rainy season starts in Nov and lasts to Mar. Jun is always cold and rainy. I an old man and ain't going to ride a bicycle when I can drive in comfort in my '82 Merc Capri HB.
  26. The Grumble in the Jungle
    Yes, true,...the WWF document omitted some 'citations'. But the 'citation' omitted was to a now-defunct Brazilian website, which contains the passage. You have forgotten to mention that - a fact which only weakens the IPCC's case, if anything. Nepstad can offer his opinions to support the authors of the WWF document. How does that in any way, relate to what the IPCC did with its Amazon chapter?
  27. What should we do about climate change?
    Peter Lang, I am still agnostic about nuclear power, but I find your arguments singularly unconvincing. The constant insistance that nothing else can possibly work is too extreme to convince me. I have seen other reasonable people propose using both wind and solar with storage. I see many wind generators being built now in the USA and no NPP. The wind must be cost effective or it would not be built. According to you, it would take at least 10 years to get started with nuclear and 20 to make a significant difference, while wind can start now. You want to use unproven technology for the NPP which is a big ask to solve the problem by itself. You have not addressed my question about what you will do in Afganistan, Nigeria and Iran. I am uncomfortable about building reactors in those locations. I find the solutions that incorporate many different sources of power, wind, NPP, solar, geothermal, to be most convincing. The issue is what fraction of the mix is each type. You have been making most of the posts in this thread and I see little headway in getting agreement. Think if you are achieving your goals.
  28. Greenland ice mass loss after the 2010 summer
    #30 Albatross Can you please refrain from suggesting nefarious goings on concerning these Greenland Ice Sheet (GIS) data? Thanks. Asking the average "skeptic" to argue without hinting at conspiracy is like asking a baseball player to use a swizzle stick instead of a bat. They may downplay or disavow the conspiratorial angle when it's expedient, but when so much scientific evidence points to the same conclusion, conspiracy is ultimately the only coherent, politically effective counterargument available. It doesn't make any sense, and it requires throwing all standards of evidence out the window (including the ones "skeptics" demand for AGW), but without it, they'd be stuck with the argument that thousands upon thousands of incorrect measurements somehow dovetailed to form the false impression of a dangerously warming world. That's not the sort of argument that fires up the base.
  29. Isn't global warming just 2 °C and isn't that really small?
    RE: #36 Glenn Tamblyn, I have reworded it a couple of times because the writing was a bit ambiguous. My original phrasing had the CO2 doubling at the end of the sentence iirc and that confused some readers, so I moved it to the middle. I've similarly changed the phrasing of the 'warmest in 600,000 years' paragraph. The meaning of both is the same as it was originally, but hopefully it is less open to misinterpretation. I would also consider specifying that comparing any individual ice core to today and seeing whether it has been 2 °C warmer than today or not isn't necessarily going to be that accurate. After all, we don't expect warming to be absolutely uniform and the majority of places won't warm by 2 C exactly, therefore your attempted comparison will be wrong.
  30. What should we do about climate change?
    Re: Peter Lang (260) Thanks for the links. They're appreciated, but completely unnecessary. When it comes to the value of nuclear power as an energy supply source, you're preaching to a choir member. However (there always seems to be a however, doesn't there?), let's be pragmatic. While an end-goal of 100% of energy needs supplied by NPP can be an admirable goal (if there exists no other practical alternatives no wean us off fossil fuels), in the world most of us inhabit there exists no possibility of that happening. In order for that to be an eventuality, there must first take place an extensive educational process to resolve lingering public concerns and fears. So, in the short term, you must make allowances for a place at the energy dinner table for renewable energy sources (specifically wind and solar). Wind and solar also possess the distinct advantage of tying directly into the American self-definition of independence and autonomy, and not being beholden to outside interests. Given the choice, a not-insubstantial segment of the populace would opt for a combination of wind/solar/geothermal energy sources for personal and business usage. And that includes myself, my admiration of NP notwithstanding. So a mixture of energy sources which center around NPP as a primary driver appear to be your best short-term bet. Given time, perhaps, a larger piece of the energy pie will go to NPP. Or not. But a greater personal problem exists for you, Peter, on this blog. SkS exists to provide clarity and education for laymen and interested professionals about the science underlying global warming and CO2's role in that warming. Your refusal to acknowledge a position either in belief of the science underlying humanity as the primary driver of CO2 elevations and their central role as the biggest control knob of global temperatures, or in disbelief of it, stands to severely undermine your credibility in your attempts to sway people's minds here to your advocacy position of NPP. Let there be no mistake on this: there exists no play, no grey area, no middle ground; either you acknowledge the science and CO2's role in the warming we empirically see, or you don't. Black and white. It doesn't make you an advocate of AGW in the same sense that you advocate for NPP's. But it will either restore some needed credibility to you, or take it away completely should you disavow it. As Bibliovermis has stated, you cannot advocate a solution for a problem which you refuse to acknowledge exists and hope to retain a shred of credibility with any here. Including me. The Yooper
  31. Hockey stick or hockey league?
    Actually, Ken, radiative cooling increases with the temperature but decreases with GHG forcing. The upwards slope in temperature indicates that the radiative cooling is below the solar input (imbalanced), and will stay that way until we reach a (rough) equilibrium. Radiative cooling is presently under the pre-industrial levels. Which won't change as long as we're chasing the GHG forcings - the energy imbalance causing the climate change.
  32. Hockey stick or hockey league?
    Ken,The northern hemisphere land is used because there is the most data for that chart. I care more about the land than the ocean since I live on land and it affects my life the most. The thermal inertia of the ocean keeps it cool for the present. Eventually it will warm up and then we will really be in trouble. The radiative cooling increase is entirely due to the increase in temperature caused by AGW. How deniers can argue that the increase in radiative cooling is positive is beyond my understanding.
  33. What should we do about climate change?
    #Peter Hogarth "the current build of Gen III reactors may run out of fuel before the end of their design life if current rates of use accelerate (going by the industries own figures)." Probably not according to a big recent MIT study of the nuclear fuel cycle. However, there are lot's of politics connected with the fuel cycle in the US and I think one needs to read between the lines a bit. In particular, the US would like to control the fuel cycle internationally as much as it can. But that doesn't change the finding of sufficient uranium. The Future of the Nuclear Fuel Cycle
  34. Greenland ice mass loss after the 2010 summer
    Robert Wray #39: "The best way to verify results in science is to use multiple methods to measure ice trends." Speaking of which; Cryosat recently completed its commissioning phase... so we should soon have another very high quality data source by which to evaluate the Greenland ice mass (among other things).
  35. Hockey stick or hockey league?
    adelady #14 Why indeed. The pattern emerging from this award winning blog is a regurgitation pattern. Re-stating arguments and reproducing charts which have already been extensively discussed elsewhere. The Northern Hemisphere 'land' temperature chart exaggerates the temperature increase - a global chart which includes the oceans shows significantly less temperature rise. The Net Climate Forcing chart might also mislead when it should be noted that relative to AD1750 - radiative cooling at AD2005 is estimated at -2.8W/sq.m and rising (exponentially and negatively) with the fourth power of absolute temperature. Boofy might have a point - why not produce a chart of Chinese GDP or the population of Chinese solar panels plotted against CO2 GHG concentration. I am sure the correlation will be high.
  36. What should we do about climate change?
    Peter Lang #242: "Who said anything about 100% nuclear?" Peter Lang #204: "Nuclear is some 10 to 100 times safer than coal for generating electricity as you can appreciate from figure 1 in the link I provided. I point this out because coal is the only other technology, realistically, that can provide the electricity modern society demands." Peter Lang #237: "You believe GHG emissions are a mjor risk, yet you preclude tackling them with the only viable technology available to make serious cuts" Peter Lang #194: "However, the wind figues are not comparable because wind power cannot substitute for coal power; only nuclear can do that (to any significant extent)." Your repeated insistence that nuclear is our only alternative to coal inherently precludes all other options. Also in #242: "That question is really asking: why do you have aphobia about nuclear power?" This in response to a post (#238) wherein I advocated the use of nuclear power; "However, the most logical course is a mix of energy sources... wind, solar, hydro, geothermal, nuclear, et cetera. Each where they are most accepted and practical." It is simply impossible to have a rational discussion with someone who CONSTANTLY makes false statements about the very content of the dialog. Your advocacy of nuclear power is SO combative and SO irrationally over the top that you actually manage to turn OTHER advocates of nuclear power off it.
  37. Greenland ice mass loss after the 2010 summer
    Glenn Tamblyn #14 "Individually we can do nothing, only when we all act together." More realistically, at least have a good plan B in the works. With all those computers and bull dozers, just think of the possibilities... perfect waves for surfing, fish farms, etc.
  38. What should we do about climate change?
    The future of nuclear energy production looks bright, as it has for decades. The present (reality?) turned out to be problematic and we've been waiting for solutions for decades.
  39. What should we do about climate change?
    @Peter I have the feeling we are running in circles. In response to your last post, I will therefore only stress the most important issue I have wanted to bring up: Peter: The point I am making is that if we allow clean electricity to be cheap, it will displace oil for transport and gas for heating and, therefore, reduce emissions from all fossil fuel use. I completely understand the point you are making. I am asking you to provide proof that your hypothesis is correct: If we provide enough cheap energy (e.g. nuclear), that it will automatically make mankind turn away from fossil fuel (even with fossil fuel still available in substantial amounts). Until now, reality proves otherwise (see France and see worldwide CO2 emissions). What makes you think it will be different in the future ?
  40. What should we do about climate change?
    I said upthread that people don't fear nuclear power once they have lived near it. Here is a photo of once of Canada's nuclear power stations, Pickering, nestled neatly in the suburbs of Toronto. Land values around here are higher than around the coal power stations.
  41. 2009-2010 winter saw record cold spells
    jyyh the paper you quote should be Turney and Jones 2010. Please not that they call the Agulhas current effect a feedback, not a forcing.
  42. What should we do about climate change?
    For those who would place more trust in Scientific American, you might prefer Smarter Use of Nuclear Waste
  43. What should we do about climate change?
    Daniel Bailey, Regarding the management and reuse of once-used-nuclear-fuel (nuclear waste to some), you might be interested in this article. If you would like to know more about the Gen IV and small nuclear power plants, this USNRC web site provides authoritative short summaries on the current status of the main players.
  44. 2009-2010 winter saw record cold spells
    As the oceans are heat capacitors of the planet and there are 3 of them, Pacific, Atlantic and the Indian ocean it is reasonable to suggest cold intrusions from either pole will affect the weather systems over them. This combined with the Walker circulation and ENSO might produce an uneven rythm on the weather patterns over land areas, even without the GW effect. There was a paper recently of the significance to the warming of the S Atlantic of Agulhas current, but of course I've lost the link. Similar patterns would be the Indonesian throughflow (linked to ENSO and IOD) and the cold water intrusion to N Atlantic (likely linked to NAO). In combination these likely produce the teleconnection patterns the values of which are usually evaluated after they've happened, but which also have a limited amount of predictive value.
  45. Skeptical Science Firefox Add-on: Send and receive climate info while you browse
    I've installed the Skeptical Science 1.0 add-on, then closed and restarted my Firefox v3.6.12 a couple of times, but I don't see the View Report icon or Create Report icon anywhere. Might some other add-on be interfering?
  46. Greenland ice mass loss after the 2010 summer
    HR @38, I think John may have erred when he said "hottest on record". In the report they say: "A clear pattern of exceptional and record-setting warm air temperatures is evident at long-term meteorological stations around Greenland (Table GL1)." They then go on to indicate which stations had record setting seasons (e.g., Nuuk (warmest spring and summer) and Thule (warmest spring), or Aasiaat warmest past 12-months on record). So their summary is, IMHO, a fair reflextion of recent temperatures at stations with long-term records. So, IMHO, John should probably say: "Noteworthy are the exceptional and record-setting warm air temperatures observed over portions of Greenland so far 2010". Caveat--it could be that another data set, such as GISS or ETA-interim, supports John's wording, I don't know.
  47. Greenland ice mass loss after the 2010 summer
    The Inconvenient Skeptic at 02:45 AM on 2 November, 2010 "Another study from September showed that the isostatic adjustment from the last glacial period is causing the ice loss to be overstated by about double. So which is correct? The studies that give the higher results don't take the adjustment into account. Stating that the loss is 200+ Gt/yr as fact when there are “published” articles that give results that are half as much is a bit disingenuous." Do you know what is also disingenuous. Giving the impression you know what you're talking about when you don't. Adjustments for GIA are done to all grace and altimetry methods. This study you refer to (Wu et al. 2010), does it in a different way than before for Grace data. Is it better? Well it disagrees with the three other primary methods Radar interferometry, Altimetry and Previous Grace studies. In fact a new study (Sorensen et al. 2010) evaluates 4 different methods for estimating Greenland's mass balance using icesat's laser altimeter and concludes that the best estimate is 237 GT/year. The point here Mr. Kerr is that just because a study is the newest doesn't mean it is the best. The best way to verify results in science is to use multiple methods to measure ice trends. Another little note for you. Wu et al (2010) shows ice losses at the upper limit of IPCC estimates. I don't know how you skeptics call this good news?
  48. What should we do about climate change?
    Some of the issues with selling power back are simply consumer mindset. If they are paying say $0.12/kWh for electricity from the grid, then they expect to sell it back to the grid for the same price. On the other hand, grid companies cant why they have to pay retail price to get it back rather than the wholesale price that they pay large generators. Once this is understood, then if you can generate power cheaper than power company can supply it, then it makes sense to do so. Selling back excess generation then just becomes a bonus. A marginal proposition dependent on a sell-back price shouldn't be done. However, I can think of very few small-scale renewables where it is worth doing this. Economies of scale apply to renewables too. By the way, thanks to all contributing here. I am finding the arguments and references put up very interesting.
  49. Greenland ice mass loss after the 2010 summer
    "Greenland temperatures were the hottest on record." Is it possible to qualify this statement? From table GL1 I see lots of records being set in 2010 but mainly only at stations which begin records after 1949 (Nuuk would standout from this). In fact in terms of annual temperature records 1929 and 2005 might also be standout years. The longest records have many records set in the first half of the 20th C. I used KNMI Climate Explorer to plot Greenlands temp record (NCDC). 2005, 2007, 1943, 2008 and 1995 all seem hotter in Greenland than 2010. I think the statement above is a little misleading due to the poor presentstion of the temperature data in the report. It would have been very easy to simply present a temperature record for Greenland as a single line on a graph. If you did that then 2010 would be hot but wouldn't be the standout year suggested in the text. Why didn't they do that?
  50. gallopingcamel at 13:50 PM on 2 November 2010
    What should we do about climate change?
    archiesteel, For 30 years I have tried to sell power to the grid. I tried to find a house with a small stream with the idea of setting up a mini-hydro plant but failed to find the right site. Later, when living in windy New Jersey in a location with a genuine Dutch windmill nearby I was seeking planning permission to construct my own windmill but my company relocated me to.....Holland. My next failed project arose when I bought a house that had a buried 1,000 gallon propane tank. I planned to install a generator that would have produced electricity at $0.10/kVAh but the power company would only pay me $0.08/kVAh. There is better technology out there now that might do a better job than my generating plant but I sold that house. I had high hopes for fuel cells but we are still waiting. I am getting too old for building my own power systems so my advice to you is keep trying!

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