Recent Comments

Prev  2443  2444  2445  2446  2447  2448  2449  2450  2451  2452  2453  2454  2455  2456  2457  2458  Next

Comments 122501 to 122550:

122501. Berényi Péter at 01:12 AM on 12 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        Ned, it's not nail in coffin, just snow. However, it is hard to talk about Antarctic warmth while snowflakes keep coming down on your head. In a time when almond trees should bloom. Also, I think we have worked enough here to deserve some recreation time (post #90 on southern sea ice still waiting for pal review).
122502. RSVP at 01:12 AM on 12 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        Ned "Let's please not drag this blog down to the level of WUWT-style "gotcha" argument,.." I agree with the spirit of your remark, however I would ask. If climatic conditions are simply shifting in season and location, or weather exhibited more erratic behaviors (where in reality there was no net energy gain), would we still want to call this global warming? Or put another way. If North Atlantic warming slows down the Gulf Stream which in turn cools Europe, providing negative feedback, which basically impedes further warming, should we still be calling this "global" warming?
        Response: It helps to clarify exactly what is meant by global warming. The globe is warming. The planet is accumulating heat. More energy is coming in than escaping back out to space. If the planet is still in positive energy imbalance, then yes, global warming is still happening.
        
        Weather and ocean cycles cause the heat within our climate system to slosh around in chaotic ways. But the total heat content of our planet continues to increase because of the energy imbalance imposed by increased greenhouse gases.
122503. CBDunkerson at 01:10 AM on 12 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        RSVP, looking at surface area vs volume does not change the results. Yes, Antarctic sea ice is a much larger percentage of the global total AREA (~38%) than it is of the total volume (~0.5%)... but that's still less than the 62% of world ice area which is melting. Amount of ice on the planet, both by area and total volume, is decreasing. Ergo... positive feedback.
122504. Dennis at 00:52 AM on 12 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        There is an important angle to the manner in which the petition was originally circulated that is worth repeating. The petition's cover letter was signed by Fred Seitz, and a past president of the National Academy of Sciences. Now, Dr. Seitz is welcome to support the petition and point out his scientific credentials. However, the petition also included an article "Environmental Effects of Increased Atmospheric Carbon Dioxide" (I don't know if it was peer reviewed) that was made to look it came from Proceedings of the National Academy of Sciences. Whether intentional or not, it was clearly misleading to some people.
122505. Ned at 00:51 AM on 12 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        Back on topic, anyone who wonders whether the Southern Ocean around Antarctica is actually warming should check out the following: Roemmich 2009 (e.g., Figure 3.1a, showing high warming in depths from 0-400 dbar at latitudes 40-60 South). Mayewski 2009, especially sections 2.4.1 ("Warming of the Circumpolar Southern Ocean"), 2.4.4 ("Rapid Ocean Warming at the Western Antarctic Peninsula"), and 2.5 ("Changes in Southern Ocean Circulation"). Convey 2009, particularly the section on the instrumental period and the subsection on the Southern Ocean.
122506. Ned at 00:11 AM on 12 March 2010
        Antarctica is gaining ice
        protestant, soot and black carbon are not significant factors in Antarctica, due to the continent's isolation. Comparison to the Arctic or to montane glaciers in northern hemisphere regions with heavy soot/BC loadings are not realistic. You're right that there aren't sufficient data to construct a mass balance for Antarctica in the 1930s, or any time before the International Geophysical Year (and estimates from before the launch of GRACE will have much wider confidence intervals). But most of that uncertainty is in the accumulation side, not the ice loss side, where there's a reasonable degree of confidence that ice loss has been accelerating. Thus, for example, a series of ice shelves on the Antarctic peninsula have partially or fully disintegrated over the past two decades, all of which managed to survive the 1930s. And in recent years these effects have been moving progressively further south, an additional confirmation that warming is accelerating in the west Antarctic. Finally, I think you're mistaken about the ARGO data, though it's understandable since the claim "ARGO data show the oceans are cooling" has been very widely publicized among "skeptical" websites over the past few years. This is discussed in great detail elsewhere on this site: Does ocean cooling disprove global warming? In particular, whether or not you accept the more recent analyses of ARGO showing that the perceived 2003-2006 "cooling" was an artifact, we're talking here specifically about warming of the Southern Ocean around Antarctica. This has unequivocally been warming faster than the ocean as a whole -- see, e.g., Roemmich 2009. Note Figure 3.1(a), which shows relatively high warming of surface waters (down to 400 dbar) from 40-60 South latitude.
122507. Si at 23:46 PM on 11 March 2010
        Every skeptic argument ever used
        Even more intriguing is the lack of modern era data!
122508. Si at 23:44 PM on 11 March 2010
        Every skeptic argument ever used
        This is clearly a one-off and/or very early study - the actual data shows a distinct cooling trend since the Roman era - intriguing that Nature published it.
122509. Dikran Marsupial at 23:23 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        "If we remove all the engineers, medical professionals, computer scientists, and mathematicians" I have a degree and a PhD in electronic engineering, teach comupter science, and perform research in statistics, including work on climate change. I am not the only one, for example Gavin Schmidt has a degree and a PhD in (applied) mathematics, I'm sure you wouldn't want to ignore his views. ;o) Engineers, computer scientists and mathematicians are just the sort of people who should be working more in climate research, especially when so much of it involves engineering, computing, maths and stats! P.S. Some computer scientists and mathematicians I know might take exception at being described as not being "actual scientists"!!!
122510. protestant at 23:09 PM on 11 March 2010
        Antarctica is gaining ice
        Ned wrote: "You're right. If we had no other evidence that fossil fuel combustion produces CO2, and no other evidence that CO2 absorbs infrared radiation, then we wouldn't be able to conclude that anthropogenic greenhouse gases were warming the earth just from measuring glacier retreat alone." So CO2 traps heat, whats the big news? Thats only a half-truth like we all know its all about feedbacks: we dont even know if they start with a + or -. But that's another topic. Ned wrote: "Actually, what GRACE does is measure distortions in the earth's gravity field over broad areas and long periods of time. This can't tell you what the exact elevation of the ice surface at point X was on date Y, but it can give you a very precise estimate of regional-scale, long-term changes in ice mass. You really should make an effort to understand how things work before throwing around accusations of "lunacy"." Ok, I was obviously wrong about that and thank you for clarification. Note that I used the term "lunacy" with the question about capability to measure 7mm differences on ice thickness, not with other possible methods. But back to the point, there are another theories for glacier melting and one is the black soot. The Lawrence Berkeley Lab concluded in their recent study http://newscenter.lbl.gov/feature-stories/2010/02/03/black-carbon-himalayan-glaciers/ that black carbon is the most significant factor on the melting Himalayas. There are other studies as well which conclude aerosols have a significant role on observed glacier changes and that increasing temperatures are not nearly enough to explain it. About context I mean we have no idea how much Ice mass Antarctica had in the 30's or how much there was ice on the 70's. Or how much variability there was between those periods. Just a 8 year trend is completely uninformative and the seen changes can be as well natural oscillation, the context would clarify this. Yet we have no context so the measurements from GRACE still tells us almost nothing. If the "warming oceans" (where actually our highest quality ARGO-data shows a slight cooling) were the reason for ice mass loss in Antarctica there would be also no increase in the sea ice. But for some reason sea ice still increasing. I bet that the most affecting factors considering glaciers are the black soot and changes in rainfall. Rising temperatures might even have an ice thickening results since in most glaciers the temps are really much below 0C most of the year and increased temps mean more snow - more ice. Where Himalayas might retreat from the lower reagions - the upper regions are expected to increase in thickness. Some of the points were a bit offtopic but I hope you dont mind. Greets, protestant
122511. Nick Palmer at 22:59 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Humanity rules touches on an important point about the petition that seems to have been missed by most critics. Apologies for anyone who has seen this comment before that I have posted elsewhere. "Re: the Oregon petition. I have been trying to spread my view on an aspect of the wording of the petition which seems barely to have been noticed. It is a misleading nature of the statement that even Jim Hansen could have legitimately agreed with. The wording in the petition is: There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gasses is causing or will, in the foreseeable future, cause catastrophic heating of the Earth’s atmosphere and disruption of the Earth’s climate. The weasel words are a)”is causing or will”, b)”catastrophic” and c)”disruption”. The first is an absolute statement. Even if the scientific evidence said there was a 99.99 % chance, then that is still not absolutely definite is it? A pernicketty type could not deny the very small possibility that the climate may not react as we think, so they would have been able to sign with a clear conscience. The second and third effectively put forward the straw man that climate science is saying that the worst scenarios will come to pass, warming will be at the very top of the scale and we will definitely be screwed. As the science and evidence does not state that categorically, again people can sign legitimately. The wording also seems to only restrict consideration to that warming likely to be caused by human emissions – it cleverly leaves out feedback emissions. The relatively small increases of temperature that human emissions alone are causing, and will cause, directly will, in turn cause feedback emissions (water vapour, melting permafrost, clathrates etc) that probably will cause the rises in temperature that are likely to be dangerous and lead to climate disruption. The petition implies that it only is concerned with direct human emissions. Just my interpretation, because I have really not seen any dissection of the actual wording – or if it’s been done it’s not widespread as a counter argument to the validity of the views of those who signed it. Nick Palmer "Sustainability and stuff according to Nick Palmer"
122512. HumanityRules at 21:06 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        From the petitions home page. "There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gasses is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate." For me the important word in that sentance is catastrophic. It is difficult to actually lump all individuals who are critical of the state of climate science, the castostrophic predictions or the anti-human agenda it promotes as having one brain that denies all the science. For example assuming the Richard Lindzen on the petition is the same Richard Lindzen of Wikipedia's list of climate deniers then here is his position according to Wikipedia. "We are quite confident (1) that global mean temperature is about 0.5 °C higher than it was a century ago; (2) that atmospheric levels of CO2 have risen over the past two centuries; and (3) that CO2 is a greenhouse gas whose increase is likely to warm the earth (one of many, the most important being water vapor and clouds). But – and I cannot stress this enough – we are not in a position to confidently attribute past climate change to CO2 or to forecast what the climate will be in the future." I'm not even sure this form of analysis is valid. What percentage of any population would sign a contentious petition not matter what the subject. Especially one that would potentially expose them to co-workers, employers and funding bodies. In fact even those with little to hide aren't on there. I had a quick scan for some of the more infamous 'denier' names I know and couldn't find them. It's a dull and pointless exercise but feel free to give it a go. My experience of radical politics is that very few people are willing to put their head above the parapet when the nature of the politics goes against the prevailing current in society. Relatively small numbers of people in the 1950s, 1960s and even into the 1970s openly supported gay, black or womens rights, this did not make them unworthy fights.
122513. Arkadiusz Semczyszak at 21:00 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        D. B. Klein, C. Stern The Independent Review, Spring 2009 "Generally speaking, we can observe that the scientists in any particular institutional and political setting move as a flock [!!!], reserving their controversies and particular originalities for matters that do not call into question the fundamental system of biases they share." —Gunnar Myrdal, Objectivity in Social Research "Perhaps we avoid studying our institutional lives because such work is not valued by our colleagues. The academy is, after all, a club, and members are expected to be discreet. Like any exclusive club, the academic world fears public scrutiny. Research is in the public domain. Outsiders [!] might use what the research reveals against the academy." —Richard Wisniewski, "The Averted Gaze" "The thousand profound scholars may have failed, first, because they were scholars, secondly, because they were profound, and thirdly, because they were a thousand. [...]" —Edgar Allan Poe, "The Rationale of Verse"
122514. MarkR at 20:51 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        So what we can conclude is that the OISM doesn't contradict the polls. With years to self select, we're on <1% of what they call 'scientists' (hey look, I'm now a 'scientist', thanks OISM!) they've collected 0.3% signatures. Polls seem to find over 80% support amongst Earth & atmospheric scientists, so it's no surprise they got 0.3% of them to sign a petition saying otherwise.
122515. RSVP at 20:45 PM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        CBDunkerson As far as feedback, I was talking about albedo. All you need is a thin covering of frost on the ground to make it white and increase reflectivity. You could have a km of ice melting below you, but that shouldnt affect this particular variable.
122516. John Russell at 20:23 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Perhaps the OISM should be as open in supplying the raw data on which their survey was based as they expect the UEA's CRU scientists to be with theirs?
122517. CBDunkerson at 19:38 PM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        RSVP, thank you for perfectly demonstrating my point. Yes, sea ice coverage around Antarctica has increased slightly. Thus, that portion of the planet's ice is growing. Of course... it comprises less than 1% of the total. The LAND ice on Antarctica, which is 90% of the ice on the planet, is melting... as is the 9% of ice on Greenland and the remaining part of 1% found in the Arctic sea ice and total glacier mass on the other continents. So, as I said... the NET change is melting ice and a positive feedback. No matter how much 'skeptics' insist on seeing ONLY the minuscule fraction of ice which is growing.
122518. CBDunkerson at 19:31 PM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        Tadzio, no most of us are amateurs too... we've just been at it a while now. I really can't tell you precisely what happens with deep water currents around Antarctica. Obviously they have to mix with the rest of the oceans, but how quickly that happens and/or exactly where I couldn't say. Sorry about the difficulty in getting answers. With so many debates going on a single post on a tangential issue tends to get lost. Best advice is to just keep reading. As you pick up more it gets easier to fit the pieces together.
122519. chris1204 at 19:21 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Mike: 'I wonder how, say, neurosurgeons would react to a survey of particle physicists on their opinions of brain tumour treatment? Or what veterinarians think of the latest on loop quantum gravity?' As a psychiatrist, it happens to me all the time. I've learnt to live with it. Actually the added burden of accountability to the public at large while at times discomfiting has been a good thing for my profession.
122520. Si at 19:18 PM on 11 March 2010
        Every skeptic argument ever used
        This Nature article is interesting on Roman/Medieval/Little Ice age periods. The article describes research using clam shells instead of tree rings to look at the past climate.
122521. Doug Bostrom at 18:44 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        nerndt at 17:18 PM on 11 March, 2010 How well does near-vacuum conduct? You really ought to read Spencer Weart's history of climate research, here: The Discovery of Global Warming It's a fun read and once you've digested it you'll be much better prepared to deal with the finer points of the topic. Honestly, I don't want to sound supercilious but conduction is really not the issue here.
122522. RSVP at 18:37 PM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        CBDunkerson "The snow and ice cover of the planet is melting." My impression from the article was that ice cover was growing in Antartica, and please explain how it is melting at -17 C ?
122523. RSVP at 18:17 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        "I would be curious, RSVP, as to what you would answer to this question if given yes or no option in a survey." It is a meaningless trick question (for the reasons stated), but I would have to say "yes".
        Response: Thanks, I appreciate the response.
122524. RSVP at 18:09 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        It is ironic also that it is the experts who spend the most energy testing their own theories. The experts "require" empirical evidence to back their claims. If they are so sure of themselves, why do they continue to take measurements?
122525. Em at 18:01 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Unlike those that have commented that it is unnecessary to count heads I found this to be quite an interesting post and worthwhile. If statistics are being bandied about by the media over how many scientists agree/disagree with the concept of AGW then I think it is very important to know how these statistics are being obtained. The sad fact is that the vast majority of people will not do follow up research on these sort of statements, or about AGW at all and will get all their information from mainstream media sources. If these sources do not explain how the data has been obtained (and that would not make it nearly as sexy and controversial), then it must come from a post such as this. I also have a science degree, but I would definitely not consider myself a scientist, and I do know people who completed the same degree as me who would still rather believe quack theories on some subjects over proven scientific research. So while a science degree may teach scientific process, it can’t make all graduates apply it in all situations. Based on this I think it is valid knowing that the “scientists” in the OISM petition are no more qualified than myself. I have an opinion, but I would never pass myself off as an expert just because I have a degree, flattering though it would be to be considered a scientist!
122526. RSVP at 17:56 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Exactly what kind of people need to be convinced of AGW if it isnt precisely the educated class that appears in these lists? ...and as far as the question: "Do you think human activity is a significant contributing factor in changing mean global temperatures?". ...the wording is pretty loose and would be hard for anyone to deny. To say "significant contributing factor" isnt say much of anything. 4% could be considered "significant", for instance, we are talking about a pay cut, or increase in taxes. And anyone who lives in or near a city, (and that is about nearly anyone), knows very well that urban sprawl adds heat, which would necessarily "contribute" to an increase in mean "temperature". As I have said in earlier posts, a big problem with the marketing of AGW is that it doesnt restrict its claims nor provides precision in its definition of global warming. Why wasnt the question simply construed as: "Do you think human activity causes global warming?" ...since the letters AGW, afterall, say nothing more than this.
        Response: The wording of the question "Do you think human activity is a significant contributing factor in changing mean global temperatures?" was chosen in order to compare the results to a Pew survey that asked the same question.
        
        I would be curious, RSVP, as to what you would answer to this question if given yes or no option in a survey.
122527. angliss at 17:40 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Geo Guy (#3): Do you feel that a housewife who has an undergraduate geology degree but taught middle school science as her career has equivalent expertise to a climatologist who has worked in the field for decades? I ask because, by your own statements, this hypothetical housewife is "qualified to reject any statement that they believe was reached at through a faulty process," even if she has never studied climate science. That's one of the main problems with the OISM petition - it produces a false equivalence between expertise in climate and expertise in other, totally unrelated fields, purely on the existence of a Bachelor of Science degree. The other point of my post is that, by the OISM's own criteria, their 31,000 signatories do not represent a "significant number of scientists who disagree...." Using the OISM's criteria, 31,000 people represents only 0.3% of all scientists. This is the difference between an absolute measurement and a normalized measurement - yes, 31,000 sounds like a lot of people, but in reality it's a tiny number when compared to the entire defined population.
122528. Mike1637 at 17:35 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        @4, chriscanaris makes an interesting comment with:

        "...a survey of what tertiary educated individuals with some background in the sciences might think is of some relevance so long as it is represented as no more than that".

        Yet unfortunately it is represented as more than that most of the time. The Petition Project is regularly trotted out as evidence that large proportions of real, qualified and practising scientists active in the field of climate studies have grave and serious doubts about what is published in the relevant literature. This is quite clearly not the case. Additionally, is a survey of people in other scientific disciplines any more or less valid than asking an intelligent layperson what their opinion is? I wonder how, say, neurosurgeons would react to a survey of particle physicists on their opinions of brain tumour treatment? Or what veterinarians think of the latest on loop quantum gravity?
122529. chris1204 at 17:31 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        "I am curious as whether it is the younger scientists (who incidentally have more to lose) entering their careers as the oldies retire that will be the determinate of what improves the consensus in the statistics.' Peer review is a double edged sword. It may ensure quality or it may function as covert censorship in the setting of competing paradigms - a major problem when people have a huge emotional investment in an idea or a notion. Sometimes, peer review seems no more than a rubber stamp. Ultimately, there is no substitute for critical appraisal of the basic science (and climate science, while very complex, thankfully stays within the realms of Newtonian physics making it accessible to to the non-specialist).
122530. nerndt at 17:18 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        After subscribing to these posts for the past few months, it is clear that too much discussion is focused not on the true science of the problem. "What % of qualified scientists believe this or that?" Copernicus, Galileo, Einstein would all have been extreme minorities but with scientific insight and observation, the vast minority found reason and correct analysis. Much more research into measuring temperatures across both the atmosphere at low, medium and high levels, calculations showing energy gain/loss of solids versus liquis, versus gases must be made to determine where the true energy gains and losses are made. I am a lowly MS in AeroAstro from Stanford and I have strong misgivings about the true science that has been presented on the subject, yet I have little doubt about other scientific phenomena that have been discovered and modeled using engineering principles and equations. When will someone show more valid scientific data instead of roundabout opinions? Basic energy transfer ideals makes me think that most energy gain and loss by the earth is via heat conduction via the land and oceans, and virtually little by means of the atmosphere (i.e. gases). Once steady state occurs (energy coming in from the sun balances energy going out from the atmosphere), balance occurs. Heat retention in air is minimal compared to that of heat retention in liquids and solids. Can someone scientifically comapre those rates and relate them to the conditions of the earth with the energy it is constantly exposed to by the Sun? Mankind seems to always be so confident that they know the truth, until the lack of their knowledge shows them the folly of their ways. Please think about my post before denying keeping it.
122531. yocta at 17:09 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        RE# 3 Geo Guy: I can assure you that over 80% of my colleagues have a serious doubt about the findings of the IPCC. That seems pretty significant, do you have any ideas of which parts or working group of the IPCC that is disagreed on? I too encounter people, although it is almost always the older 'grey'crowd at the office who are the more skeptical of climate science. My PhD student peers when we are not "busy" with our projects debate quite a lot about climate science but we accept the basic science (and some of us are in the Skeptics Society so we know what skeptic means) I would be very interested to see the average age of the scientists who are "climate skeptics". The most famous ones I can think of Plimer, Monkton, and Seitz are pretty old (by my standards at least :P) My old (now very much retired) physics lecturer used to tell us that when he was an undergraduate there was still quite a few of the older respected physicists out there who outrightly rejected Einstien's General Theory of Relativity. I am curious as whether it is the younger scientists (who incidentally have more to lose) entering their careers as the oldies retire that will be the determinate of what improves the consensus in the statistics.
122532. garythompson at 17:07 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        in my humble opinion, AGW proponents do not further their argument by trying to discredit those who question the science just because they do not have a 'climate science degree'. Human Caused Climate Change debate is not like proving F=ma. It is much more complex and the more I learn, the more I realize I don't know. When other science was debated in the past such as general/special relativity, Chandrasekhar limit, heisenberg uncertainty principle, etc. the average person had no real world comprehension of these topics and unless one was educated in quantum mechanics, astronomy or cosmology it was difficult to grasp. Few people, even with advanced science degrees, could understand the concepts enough to debate them. Notice that there are no websites dedicated to disproving Pauli's exclusion principle! And it is a sad commentary on our education system that we don't have better math/science education to allow more to understand these theories but it was Einstein who said (paraphrasing) that if you truly understand a topic on a fundamental level you can explain it in simple terms (i.e. E=mc^2). With Climate Science, the language is in temperature, ice, snow, water vapor, IR absorption, sea level, etc. so People have a real world understanding of that and hence anyone with a website and an idea can attempt to debunk it - though many are lacking the science to do that correctly. Climate Science is quite complex and as someone who is learned in the underlying physics of Astronomy/Cosmology with a dose of quantum mechanics and electrical engineering I can appreciate the complexities of this study. And i feel competant enough to read the peer reviewed papers, analyze measured data, compare AGW theories to observations, pose my own questions and draw conclusions. And anyone who understands the underlying physics can and should become educated in the field and seek their own answers through the peer reviewed literature and the observations. I think the Climate Science community should welcome the newfound interest in Climate Science and seek to understand this complex system through the scientific method. The fact that there are large numbers on both sides of this argument should tell us something. And not all can be explained away by politics and association with Coal/Energy sectors. Let's understand this complex system to the point where it can be explained in simple terms and understood by all - because the climate affects everyone.
122533. Doug Bostrom at 16:46 PM on 11 March 2010
        Antarctica is gaining ice
        Geo Guy at 16:23 PM on 11 March, 2010 Many references, but you won't cite any? Not even the one you quoted which I might add without a cite is not cricket, either; the authors I'm sure would appreciate attribution. From your further comment I take it that aggregated data is insufficient but a single year of data is? I don't find your approach persuasive.
122534. LWeisenthal at 16:33 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        >>97.5% of climatologists who were actively publishing papers on climate change responded yes.(Doran 2009). >>What is most interesting about this study was that as the level of active research and specialization in climate science increases, so does agreement that humans are significantly changing global temperatures.<< This plays right into the hands of the "no funding without a cause" crowd of denialists. - Larry Weisenthal/Huntington Beach, CA
122535. Geo Guy at 16:23 PM on 11 March 2010
        Antarctica is gaining ice
        doug_bostrom at 07:12 AM on 10 March, 2010 There are many references to be found on the Internet, linked to valid scientific journals citing the rapid growth in the vast majority of the Antarctic landmass. I will leave it up to you to find them. In response to the author's response to mt comment: Being a geologist that has undertaken many gravity surveys, I am hesitant to make any interpretation based on aggregated data as you have done. It implies that the observed decrease is consistent throughout whereas that is likely not the case. You will get melting on the fringes and accumulation in the center - but the ice forming through the accumulation of the snow in the center is not the same as the ice that is melting on the fringes, which by the way shows a significant increase in ice mass from 2004.5 to 2005.5 suggests something else is happening or the data needs to be reviewed. The other point I will make is that a five year trend analysis, In addition,
122536. Daved Green at 16:18 PM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        Hi ,Thank you CBDunkerson for being a bit more prescient about my question , yes I was wondering about the less saline water keeping the warmer heavier currents at the botttom and if there where any studies as to where these waters are forced to go ? . I guess iam a bit out of my league here most of you guys sound like actual scientist where as iam just nonscientist trying to understand a mutlidisipline problem . also iam scared cuase no one is listening !!! thanx daved
122537. Tom Dayton at 16:14 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        I meant "sociology of science, history of science, and philosophy of science."
122538. Tom Dayton at 16:12 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        gallopingcamel, consensus plays a huge and crucial role in science. It is different from simply voting, but it is consensus nonetheless. That fact rarely is emphasized in introductory classes on science. A short addressing of the role of consensus in science is a few slides in Naomi Oreskes's "Consensus in Science: How Do We Know We're Not Wrong?" More depth on the topic can be gotten from any number of books on sociology, history, and philosophy of science. To avoid duplicating my own comments (which would violate the Comments Policy), I'll just link to some relevant ones: 195, 196, and 197 on the thread There is no consensus. Probably that is the more appropriate thread if you want to discuss the role of consensus in science rather than the OISM petition specifically.
122539. chris1204 at 16:09 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Folk with medical degrees (such as myself) are certainly not climate scientists. However, we do know something about scientific method, consistency and coherence of conclusions derived from data, validity, reliability, peer review, and the behaviour of complex systems. We also know a bit about lobbying by industrial groups (drug companies) and spend a great deal of time helping patients manage risk. We also know a fair bit about scientific fraud. We have also seen fashions come and go. Ultimately, folks such as myself become part of conversations which may influence the way someone votes (not that I would ever do that in my practice of medicine). My participation in this forum is one such conversation. I imagine a number of other participants on this forum are in a similar position, non climate -scientists, yet interested enough in a hot topic (pun intended) to engage with the issues. Consequently, a survey of what tertiary educated individuals with some background in the sciences might think is of some relevance so long as it is represented as no more than just that.
122540. Geo Guy at 15:51 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        I think that too much effort is being spent trying to disqualify or undermine the different sides to the argument and this post is a good example of this. Every scientist, no matter what background they come from, understand due scientific process and from that understanding alone, they are qualified to reject any statement that they believe was reached at through a faulty process. As for climate scientists themselves - what constitutes being one? Perhaps we can look at the World Meteorological Organization as starters - the UN organization established to facilitate the gathering of meteorological observations and promote the standardization and uniform publication of observation and statistics. It was through the WMO that weather forecasters switched from saying "a good possibility of rain" etc to assigning a probability (ie 60% chance of showers). I bring this point up because the purpose stated when the switch was made was simply that people did not understand phrases like slight chance, strong probability etc but felt a percentage assigned to a forecast was more meaningful. In other words when they say "60% chance of showers, there is no relation whatsoever to true probability from a statistical perspective, but rather they assign a percentage to allow people to better believe their forecast. In the end it has not resulted in better or more accurate forecasting. Instead of questioning the credentials of people on a list, even if 50% were found out to be incorrect, that still leaves a significant number of scientists who disagree with the findings of the IPCC. As a geologist with over 35 years of experience, I can assure you that over 80% of my colleagues have a serious doubt about the findings of the IPCC. In the end I guess we should look to the UN who recently agreed to appoint an independent commission to look into the activities of those scientists who were involved in the published findings of the IPCC reports, even though I have my doubts as I believe it was the way in which the UN established the IPCC in the first place that contributed to the poor scientific process used to generate the IPCC reports.
122541. Mike1637 at 15:39 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        "Science is not a matter of counting heads......" So why do denialists continue to count them? I think as long this keeps happening, it is entirely fair play to continue to shoot this nonsense down in flames.
122542. gallopingcamel at 15:14 PM on 11 March 2010
        Guest post: scrutinising the 31,000 scientists in the OISM Petition Project
        Science is not a matter of counting heads so my advice to AGW Alarmists is to forget about it. The IPCC "scientists" may be heavily outnumbered by Noah Robinson's Myrmidons (>30,000 and counting) but it means nothing except to politicians who think in terms of "votes". The folks who wrote this post need to lighten up; this is something to laugh about.
122543. Doug Bostrom at 14:23 PM on 11 March 2010
        It's not bad
        Vinny Burgoo at 11:37 AM on 11 March, 2010 When assessing the importance of any single component of a population's water supply, it is important to remember that water needs to be available always, and the available quantity required at any given time is bounded by definite lower limits. I've seen a lot of criticism of water supply impacts based on the notion that "only" 20%, 10% or 5% of a given total regional water supply is sourced by glacial and snowpack meltwater. If during certain times of the year the component that is only 20% of an annual supply represents 50% of the instantaneous available flow, the perspective of persons depending on that supply will be rather different than for those of us sitting in our armchairs at safe remove, wondering what the problem is. Not to be repetitious, but tell an engineer that you're going to remove reservoirs supplying 20% of a water utility's capacity and he should not worry because the annual total amount of water passing by his system will remain the same and that engineer will think you crazy. As to the rather arbitrary separation of snow and ice meltwater sources, if as we can expect glacier disappearance is accompanied by more rapid melting of snow the current budgetary components of melt water sources are of less use in predicting future impacts of glacier loss. This hair-splitting about impacts of changes in regional water supplies resulting from warming is at the end of the day not very flattering to so-called skeptics. Rummaging around for minor flaws in citations is not a robust counter-argument.
122544. Lou Grinzo at 13:14 PM on 11 March 2010
        Trenberth can't account for the lack of warming
        Gianfranco: "Travesty" is one of those words a lot of English speakers commonly misuse. In fact, many people use it as a synonym for "pity", but with extreme emphasis. John: Terrific post and explanation, by the way. I think this is a nearly perfect example of the way such wholly accurate and innocent statements can be misconstrued by those looking for a good misconstruing.
122545. Tom Dayton at 12:03 PM on 11 March 2010
        Scientists can't even predict weather
        Marcel Bokstedt, regarding chaos, please also see the Skeptical Science post Climate is chaotic and cannot be predicted.
122546. Doug Bostrom at 11:47 AM on 11 March 2010
        Scientists can't even predict weather
        Marcel Bökstedt at 09:54 AM on 11 March, 2010 Be sure to read Weart's retrospectives on the evolution of climate models. Getting the whole story will help clear up a lot of misunderstandings about how climate models function, what it is they're skilled at predicting, how skilled they are: Simple Models of Climate Change General Circulation Models of Climate Pretty fascinating just for the history if nothing else.
122547. Vinny Burgoo at 11:37 AM on 11 March 2010
        It's not bad
        JC: 'I notice Kehrwald 2008 cites the IPCC AR4 as their source so until I track down the IPCC's peer-reviewed source (most likely Barnett 2005), I've removed Kehrwald.' Would that help? Kehrwald et al. offers several contradictory estimates of the number of people in South and East Asia who rely on water from melting glaciers. Would a peer-reviewed source for any of them really confer legitimacy on self-evident nonsense? Kehrwald's largest estimate: 'TP ice fields are a critical resource for one sixth of the world’s population'. 'TP' is 'Tibetan Plateau'. In Kehrwald, 'Tibetan Plateau' has at least three different meanings. Let's assume that this one was 'Himalayas plus Karakorams plus Hindu Kush plus Pamirs plus the Tibetan Plateau proper and the mountains on its western and northern rims'. Are the glaciers in this large region a 'critical resource for one sixth of the world’s population'? Er, no. Does any peer-reviewed literature say that they are? Probably. Does Kehrwald's cited source say that they are? No. The 'one-sixth' claim was attributed to AR4 WG2 Chapter 10, which says nothing of the kind. If not pure invention, it was probably a misattributed mangling of Barnett, which claimed (on very dodgy grounds) that 'more than one-sixth of the Earth’s population [relies] on glaciers and seasonal snow packs for their water supply'. Snow *and* glaciers. Worldwide, not just 'TP'. And note that Barnett's 'one-sixth' didn't include people living on the Gangetic plain. (He got something right.) The only other attributed claim in Kehrwald (750 million seriously affected) comes, it is said, from the Stern Review via WG2 Ch10. Stern did say something like that but its cited sources didn't support it. Things get complicated here, so I won't go further unless you insist. JC: 'I find it interesting that you'd 'remove the whole thing' - do you think the whole issue of threatened water resources for such a large proportion of the population is not worthy of concern?' I find it interesting that you are happy to accept that the water resources of such a large proportion are threatened. Peer-reviewed crap is still crap.
122548. Berényi Péter at 11:18 AM on 11 March 2010
        Watts Up With That's ignorance regarding Antarctic sea ice
        #84 Ned at 00:34 AM on 11 March, 2010 "Okay, for April I get a trend that is almost but not quite significant" I don't know what you did. Here are the data files for April and May. There are two separate columns in each at end of lines, one for sea ice extent, the other for area. Extent is defined as sea surface covered by at least 15% ice, area is actual ice cover. Trend slope (least square fit), mean & dispersion is calculated for each time series. Null hypothesis: Series is stationary, data points are realizations of independent random variables with normal distribution, mean & dispersion is same as calculated from data. Question: What is the probability (p-value) of slope being not less than calculated for actual data? Answer: April sea ice extent: 0.0295 April sea ice area: 0.009 May sea ice extent: 0.0212 May sea ice area: 0.0088 For sea ice extent null hypothesis is rejected at 95% (actually 97%) confidence level, for area it is 99%, both months. Looks pretty significant. Trend for April sea ice area is +26,060 km² year^-1 (+16% in 30 years). As extent is also increasing, ice covered area gets some (86 W m^-2 average at TOA between 60-70S) sunshine in April, not much (24 W m^-2) in May. Albedo increase is not negligible (up to 10²⁰ J absorbed shortwave is lost compared to that of thirty years ago). "the Turner 2009 paper addresses your point about the seasonality of ozone depletion -- although the hole reaches a maximum in austral spring, models and observations show that its effect on circulation in the troposphere is greatest in summer and autumn" Funny. For some reason the ozone hole all but disappeared in 2002. And there is a dip in sea ice area for both April and May in the same year. Right? In this year ozone hole area is just 12 × 10⁶ km², half of last two decade's average, minimum ozone is 155 DU, 50% larger than average. But wait. Ozone hole occurs in Southern Hemisphere spring, so spring 2002 comes later than autumn, same year. One would not fancy precognition of ozone hole conditions by sea ice. Fall after this barely-hole is April-May 2003. Sea ice area is fourth largest on record. Of course it would be somewhat more correct to look at correlation between ozone hole extent & transparency and sea ice extent half a year later, but I would prefer not to re-digitize graphs. A pointer to ordinary data files, anyone?
122549. Riccardo at 10:27 AM on 11 March 2010
        Scientists can't even predict weather
        Marcel Bökstedt, what you say is quite strange given that the physics behind climate models is very similar to that of weather predictions models.
122550. Peter Hogarth at 10:16 AM on 11 March 2010
        Visual depictions of Sea Level Rise
        Charlie A at 17:07 PM on 9 March, 2010 Concentrating on the gentle start of rise in sea level from about 1800, this is attributed to warming. A recent paper examines the causes: Anthropogenic forcing dominates sea level rise since 1850 Jevrejeva, Grinsted and Moore 2009 “We show that until 1800 the main drivers of sea level change are volcanic and solar radiative forcings. For the past 200 years sea level rise is mostly associated with anthropogenic factors. Only 4 ± 1.5 cm (25% of total sea level rise) during the 20th century is attributed to natural forcings, the remaining 14 ± 1.5 cm are due to a rapid increase in CO2 and other greenhouse gases”.

Prev  2443  2444  2445  2446  2447  2448  2449  2450  2451  2452  2453  2454  2455  2456  2457  2458  Next