What scientific literature is there that supports anthropogenic global warming?

A recent statement by one of our fellow regulars caught my eye:
"You keep going on about scientific literature.... THERE IS NONE!!!!!

It is all theories and studies linked to theories and studies linked to studies

Let me repeat "THERE IS NO SCIENTIFIC LITERATURE!!!!!" "
http://answers.yahoo.com/question/index;_ylt=AjQoD0cKM7WxkBgQ3sSowlv_5nNG;_ylv=3?qid=20110119112651AAYDdXt


How true is this? What are some examples of papers published in respected scientific journals that support anthropogenic global warming? That refute other mechanisms for the warming? Ideally, papers that elaborate on observation and evidence, aside from models, would be preferred, as such was implied in the question before. Is "THERE IS NONE!!!!!" a statement well-established in reality, or is it completely farcical? If it is false, why is it being perpetuated?

Please, try to refrain from opinion only - examples of scientific literature are what I'm foremost looking for. Unless, of course, you accept the above statement, in which case I won't ask you to prove a negative.

2011-01-19T13:31:30Z

c: thanks - is there a specific link to the full list of sources that the IPCC used?

2011-01-19T14:59:10Z

Well jim, if I asked for papers that proved AGW, I would be quite dismayed if I got any because that's not how science works. "Support" is general and specific enough for the intent of my question, which was to address the statement that there is no scientific literature [supporting the theory (as I understood it to mean)]. I did not ask for evidence for climate sensitivity or any other specific item, because that's too focused; and I didn't ask for papers like Chapman et al 1996 (random choice off of the IPCC list given in some other answers) that did not even address how we think global warming is caused. Why? Because I AM careful in what words I choose and understand the extent and scope of "support." I do not want a full analysis to know what is important, I want the thousands of jigsaw pieces; it is, for example, the IPCC's job to help form the picture.

Ottawa Mike: I agree with most of what you're saying: there has been literature published that either goes against accepted

2011-01-19T14:59:32Z

(grr, I was well under the letter limit)


Ottawa Mike: I agree with most of what you're saying: there has been literature published that either goes against accepted conclusions about effects of climate change/global warming. I disagree with Baccheus (hi Baccheus) that there is no literature and no climate scientists that go against the theory. Also, even though I didn't ask for it, thanks (you too Richie) for the link to the 850+ papers. I've started skimming through to look at the titles and google up a couple names to test to see if they really support skepticism of AGW - Oreskes 2008 was listed, which I think rather humorous, and a couple don't really seem to deal with AGW at all: Davis et al 2003 and Rondanelli et al 2009 for example. A lot from Energy and Environment, too.

(An aside: the title of the article is "850 Peer-Reviewed Papers Supporting Skepticism of "Man-Made" Global Warming (AGW) Alarm." Hm, supporting?)

2011-01-19T15:01:44Z

Mickey: this question was with an agenda, if you will: it was not my intent to gather sources for both sides. I'm not basing many conclusions off of the results of this question besides what the statement above I wanted to address.

De facto anyways, I'm getting sources for both sides :)

2011-01-20T18:25:45Z

amancalledchuda: Whether or not models qualify as evidence is unfortunately (for your argument) something that I specifically asked be left out of the equation altogether for the intents here. Several sources have already been given here to literature that gives observed evidence of an enhanced greenhouse effect and/or a human-induced greenhouse effect (or links to studies). If you're going to rant about there being no evidence while at the same time ranting on about how Baccheus for example turned the scientific process on its head, you may want to rethink your own understanding of the process of debating. The evidence was given. Saying it wasn't, or that it doesn't exist, is not a sufficient, nor even logical, nor even intellectually acceptable, rebuttal. At all.

2011-01-21T08:57:40Z

amancalledchuda: Arguing that an enhanced greenhouse effect will not cause warming because it is being masked by cooling effects is a stance that requires evidence. Several studies have already concluded there will be positive feedbacks:
atmospheric water vapor content:
http://atoc.colorado.edu/~dcn/ATOC6020/papers/Soden_etal_727.pdf
http://www.pnas.org/content/104/39/15248.full.pdf
melting permafrost:
http://www.nature.com/nature/journal/v443/n7107/abs/nature05040.html
sea ice melting, decreasing ocean albedo:
http://www.cosis.net/abstracts/EGU2007/01362/EGU2007-J-01362.pdf
http://nsidc.org/sotc/sea_ice.html
diminishing capability of ocean to absorb CO2:
http://www.sciencemag.org/content/316/5832/1735.abstract
http://www.agu.org/pubs/crossref/2007/2006JC003941.shtml
Climate sensitivity in general: the warming due to a doubling of CO2 is about 3˚C, which is mainly due to positive feedback mechanisms:
http://www.skepticalscience.com/climate-sensitivity-advanced.htm
(Too many links for

2011-01-21T08:58:22Z

*(Too many links for that topic to list all here)

(I'll continue in another details)

2011-01-21T09:16:29Z

Continued:

Evidence for greenhouse effect causing warming:
- CO2 up 40% from pre-industrial levels
http://www.esrl.noaa.gov/gmd/ccgg/trends/global.html
http://maps.grida.no/go/graphic/historical-trends-in-carbon-dioxide-concentrations-and-temperature-on-a-geological-and-recent-time-scale
- More warming during the nights than days
http://www.met.sjsu.edu/~wittaya/journals/diurnalTempRange.pdf
- Decreasing outgoing long wave radiation in the wavelengths CO2 best absorbs at
http://www.eumetsat.int/Home/Main/Publications/Conference_and_Workshop_Proceedings/groups/cps/documents/document/pdf_conf_p50_s9_01_harries_v.pdf
- Increase in downward long wave radiation in those same wavelengths
http://ams.confex.com/ams/Annual2006/techprogram/paper_100737.htm
- Upper atmosphere cooling while lower atmosphere is warming
http://www.ufa.cas.cz/html/climaero/topics/global_change_science.pdf

2011-01-21T09:45:37Z

Evidence of man's involvement:
- Isotopic analysis: 13C ratio falling
http://www.bgc.mpg.de/service/iso_gas_lab/publications/PG_WB_IJMS.pdf
- Accounting for human emissions
- Oceanic acidification - net uptake, not release, of CO2
http://www.antarctica.gov.au/about-antarctica/fact-files/climate-change/ocean-acidification-and-the-southern-ocean
- Volcanoes emit >100 times less CO2 than we do
http://volcanoes.usgs.gov/hazards/gas/climate.php
- Decrease in atmospheric oxygen content
http://adsabs.harvard.edu/full/2006TellB..58...95M


An enhanced greenhouse effect will lead to warming. There is no large negative feedback mechanism that would be able to stop warming past the "danger threshold" of ~2˚C, unless you'd like to provide some sources for such a feedback.

2011-01-21T16:19:00Z

>>>Well, how about the complete lack of the tropospheric ‘hotspot’ - which is the predicted ‘fingerprint’ of greenhouse gas warming?

It's not. The hot spot is a predicted result of the decrease in the adiabatic lapse rate over the tropics due to warming. There is no need to have warming due to an enhanced greenhouse effect, as what causes the hot spot is not CO2. Short time scales reveal there is a hot spot:
http://www.cgd.ucar.edu/cas/Trenberth/trenberth.papers/JClimTvertStruct.pdf
http://pubs.giss.nasa.gov/docs/2005/2005_Santer_etal.pdf
though there is still uncertainty over long time scales. The evidence however does not say that there is no hot spot.

2011-01-21T16:22:49Z

>>>I never asked for them and I am at a loss to explain why you felt the need provide them.

My bad - I had included them as a precaution in the case that you did not accept that the greenhouse effect is becoming enhanced. Since you do accept this, my links are thus, as you say, irrelevant.

2011-01-21T16:28:09Z

>>But that is beside the point. We’re back to the Null Hypothesis again

Yes, we are. I'll reiterate: if you assert that there are going to be negative feedbacks that will stop any significant amount of warming, then you need to provide evidence for such feedbacks. I have provided links to studies that confirm that there will be positive feedbacks - which means warming. Enhanced greenhouse effect = warming, then. The null hypothesis is not anymore that there will not be warming due to an enhanced greenhouse effect, it is that there will not be negative feedbacks to mask warming.

2011-01-21T16:43:36Z

>>>Yes, but this figure is derived from same computer models mentioned above, of course, and are, therefore, not empirical evidence.

Not true. There are climate models used in some circumstances to calculate climate sensitivity, but empirical data in others:
http://homepages.see.leeds.ac.uk/%7Eearpmf/papers/ForsterandGregory2006.pdf
http://www.amath.washington.edu/research/articles/Tung/journals/solar-jgr.pdf
http://www.gfdl.noaa.gov/bibliography/related_files/jmgregory0201.pdf
(oh, guess what? These were in the link I gave you before)

I also reject your adamant attitude toward rejecting all models for the simple reason that they're models, but I digress and will appease you.

2011-01-21T16:49:20Z

>>>Your “Evidence for greenhouse effect causing warming:” is actually only evidence for the greenhouse effect itself, with the exception of “- More warming during the nights than days” which, as pointed out in the very first paragraph, relies on computer models as well.

Again, not true (though I digress on the warming more during nights part). The links I gave show not static realities but dynamic change - *increasing* downward long wave radiation in CO2's bands; *decreasing* outgoing long wave radiation in those bands; 40% higher CO2 than normal cyclical levels as seen for the past several hundreds of thousands of years and *increasing* still; *cooling* upper atmosphere. Perhaps though I miss your point, in which case I think that leads us back to *you* supporting your assertion that there will be negative feedbacks.

Dana19812011-01-19T13:44:12Z

Favorite Answer

That's a difficult question to answer, because the sheer number of peer-reviewed studies supporting the AGW theory is so massive. For example here are the references cited just in Chapter 2 of WG 1 of the IPCC AR4:
http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-references.html

There are 759 studies on that list. Keith P went through the entire IPCC report, removing duplicate references, and found 4617 unique references to peer-reviewed studies.
http://answers.yahoo.com/question/index;_ylt=AgvdHaqgk.GTcI6LZSFy310jzKIX;_ylv=3?qid=20100125084032AArijQa

And that's just what's referenced in the latest IPCC report. There are thousands of new peer-reviewed climate science studies published every year, and virtually all of them support the AGW theory.
http://www.sciencemag.org/content/306/5702/1686.full

If you want examples of specific papers, I discussed some studies which demonstrate 'fingerprints' of AGW here:
http://www.skepticalscience.com/Empirically-observed-fingerprints-of-anthropogenic-global-warming.html

IMO one of the most convincing is Laštovička et al. (2006), which showed upper atmosphere cooling consistent with AGW.
http://www.ufa.cas.cz/html/climaero/topics/global_change_science.pdf

Or perhaps studies like Evans et al. (2006) which performed an analysis of high resolution specral data, which allowed them to quantitatively attribute the increase in downward radiation to each of several greenhouse gases.
http://ams.confex.com/ams/Annual2006/techprogram/paper_100737.htm

It's really an overwhelming amount of evidence and volume of research supporting AGW. To say there is no scientific literature supporting the theory is sheer denial.

"Edit: Dana's answer is a good example of what I was talking about. He is throwing around adjectives like "massive" and "sheer" and "thousands" and "overwhelming". With words like that, how can it not be true?"

I'm sorry, am I now not allowed to use adjectives? I didn't get that memo.

"Those statements are also very difficult to support"

I didn't find it difficult when I supported them. You see that blue text in the paragraphs above? Those are links to studies and other sources supporting the statements I made.

The Pop Tech list is discussed here:
http://greenfyre.wordpress.com/2009/11/18/poptarts-450-climate-change-denier-lies/
http://greenfyre.wordpress.com/2009/11/15/450-more-lies-from-the-climate-change-deniers/

Among its flaws, it considers 'Energy & Environment' peer-reviewed (that's 10% of the listed papers). Both Pielkes (Sr. and Jr.), who are both 'skeptics', asked that their papers (21) be removed from the list. There are a whole bunch of duplicates on the list. A bunch of the listed studies have been refuted. A bunch more have been misrepresented and don't belong on the list. And so on and so forth. It's classic quantity over quality, Oregon Petition style. Note that the studies aren't even purported to contradict AGW, but rather "skepticism of AGW alarm". In other words, if a study accepted AGW as being true but concluded that hurricanes won't intensify, for example, it's included on the list.

john m2011-01-19T15:50:32Z

I think the CO2 debate stalled years ago. Most people could understand the CO2 warming process. Most understand that the sun is responsible for the changing climate conditions in the past because of the natural interactions of solar radiation and greenhouse gases. This process isn't that hard to understand. The hard bit for most is the understanding of the forcing process and the chemical reaction that take place due to heat and pressure created by the natural forcing process. Now the thing is only when we have a understanding how these natural processes work that we can replicate and control them. The biggest advancement in technology would have to be the microscope and to see these natural processes taking place in the lab. As were moved forward in time it has been the advancement in being able to see things smaller and smaller. I read somewhere that there is no regulations on Nano technology and it is were weather modification has progressed from. If you don't see weather modification as a reality then your not looking close enough. So don't be a mushroom get out of the dark ages and stop eating BS Come out of the dark and become enlightened by seeking the truth to what we are seeing. Propaganda is keeping you in the dark.

Noah H2011-01-19T17:11:22Z

You could try the Climate Change Road Map or the US Navy Artic Road Map. One of the problems with 'scientific literature' is all that strange math. If you can't follow the math, then the 'conclusion' that X=Y sounds like an 'opinion'. As various people and organizations plug in small variations on the basic mathematical data the 'conclusions' tend to be in a range where a 'denier' can honestly say..."The data and the conclusion depends on who you're asking." That's true, even if the math is accurate, and peer reviewed and agreed on as accurate. We know that the CO2 level going back to 650,000 years ago is accurate, but it may not be consistent everywhere or consistent over all that time in various places...yet the 'average' for the purpose of plugging it into an equation always give a similar result though admittedly plus or minus. For instance: There are dozens of institutions all over the world that measure atmospheric CO2. The amount varies from place to place and day to day. Is it currently 387pp, or is 390ppm closer? One reporting station in Hawaii report a high reading of 400ppm, later watching the instruments drop down to 395ppm....big relief! All we know for certain is that 'on the average' we're over 100ppm of CO2 more since the beginning of the Industrial Age in the early 1800s, and ALL of that increase has to do with burning fossil fuels....no volcanoes or Al Gore required. Year to year and decade by decade the amount of burned fossil fuels mount. We know how much is burned because it's recorded and taxed at some point along its production to waste highway. We know how much CO2 will be produced by that burning and where the CO2 finally lands up. We know that the 'greenhouse effect' grows more robust every decade..we know because it's measured. There's plenty of 'literature'...what we don't have is any kind of solution on the horizon...and that's the biggest bummer of all!

amancalledchuda2011-01-20T10:49:47Z

Yes, it does appear to be an odd statement to make, on the face of it.

I can only assume that by “SCIENTIFIC LITERATURE” he actually means “SCIENTIFIC EVIDENCE” and if that’s what he actually meant, then he’s absolutely correct, of course.

Let us be clear about it; there is no empirical, scientific evidence supporting the hypothesis that mankind’s GHG emissions are having a significant effect on the climate of planet Earth. None at all.

I have pointed this out several times in the past and the usual response I get (from Dana, for example) is something along the lines of: ‘I’ve shown you the evidence many times.’ – without actually linking to the evidence, of course. Naturally, I never have been shown the evidence – how can I be shown something that doesn’t exist?

Dana in this question enthusiastically informs us that there are 759 studies referenced in Chapter 2 of WG 1 of the IPCC AR4 and that the entire IPCC report has 4617 unique references to peer-reviewed studies!

Big numbers to be sure, but can you imagine, for a moment, how many books have been written about God in the last few thousand years? And have all those books done anything whatsoever to increase the likelihood that God exists? Of course not. Why? Because they provide no empirical scientific evidence, that’s why.

So, let’s stop trying to suggest that Catastrophic Anthropogenic Global Warming is proved because of *the number* of scientists/studies/peer-reviewed papers/etc. that believe it. A hypothesis is not proved by a popularity vote. Show me the *EVIDENCE*.

And just so we’re clear; computer models are *not* empirical evidence.

Also, I had to laugh at Baccheus’ answer where he says: “Ottowa Mike is unable to pull a single study out of his list to show that it counters AGW.”

Excuse me? Since when did the whole scientific process get turned on its head? Unless I missed the memo, the Null Hypothesis is still that the climate is behaving naturally unless it does something out of the ordinary, or someone can demonstrate (using good old empirical evidence) that what it is doing is *not* natural. So far, neither of those things has happened; the climate is behaving within normal bounds, and there’s no empirical evidence to show that mankind is influencing it.

So, what Baccheus is doing here is changing the rules such that his pet theory is now the Null Hypothesis and it is up to anyone who disagrees to prove it wrong!

Brilliant! Well that’s one way to win the argument, I suppose! LOL


::EDIT:: In response to AMP…

Removed due to lack of space.



::EDIT 2:: Again in response to AMP...

Blimey! I ask for one simple link and I get 18!

You say “Arguing that an enhanced greenhouse effect will not cause warming because it is being masked by cooling effects is a stance that requires evidence.”

Well, how about the complete lack of the tropospheric ‘hotspot’ - which is the predicted ‘fingerprint’ of greenhouse gas warming? If the ‘fingerprint’ of greenhouse gas warming is absent, then couldn’t the warming also be absent?

But that is beside the point. We’re back to the Null Hypothesis again – it is not my (or anybody else’s) job to provide evidence that the enhanced greenhouse effect will not cause warming. Rather, it is your (and/or your fellow believers’) job to prove that it will and that it’s something we should worry about. I remind you that, so far, the planet has not done anything out of the ordinary. Without the bleating of the GWAs no one would have any reason to believe anything unnatural was happening.

Thus, your first 7 links are completely irrelevant. I never asked for them and I am at a loss to explain why you felt the need provide them. They do nothing whatsoever to supply the evidence I am requesting. Their effects are reproduced by computer models and those effects are largely disproved by the missing ‘hotspot’ that they are supposed to produce.

Next: “the warming due to a doubling of CO2 is about 3˚C”

Yes, but this figure is derived from same computer models mentioned above, of course, and are, therefore, not empirical evidence. It’s also a perfect example of the ‘tuneable’ (and therefore unreliable) nature of computer models, in that the range of possible climate sensitivity runs from <0.5°C to 10°C depending on who you talk to! Talk about uncertainty.

Your “Evidence for greenhouse effect causing warming:” is actually only evidence for the greenhouse effect itself, with the exception of “- More warming during the nights than days” which, as pointed out in the very first paragraph, relies on computer models as well.

AMP, do you have any evidence AT ALL that isn’t based on computer models? You know, like good, old-fashioned, empirical evidence.

I’m still waiting.

Barley2011-01-19T14:34:02Z

There are probably hundreds of journals publishing articles related to an aspect of climate science. The Journal of Climate is dedicated to climate research. It is a publication of the American Meteorological Society.

Articles on climate change are scattered through a wide variety of journal publications. For example, an article on species migration due to global warming may be published in a biological journal. An article on changing ocean currents due to global warming may be found in the Journal of Physical Oceanography.


Science Magazine is the premier science news and journal in the U.S. It covers all fields, biology, chemistry, etc., selecting articles of particular importance. I checked to the table of contents to see what they published this week. It contains the following articles related to global warming:

Lessons from Earth's Past
Jeffrey Kiehl
Science 14 January 2011: 158-159.
What can be learned from Earth's past to guide our understanding of life in a warming world?

Northern Meltwater Pulses, CO2, and Changes in Atlantic Convection
Michael Sarnthein
Science 14 January 2011: 156-158.
Detailed evidence of how the North Atlantic Meridional Overturning
Circulation behaved after the last ice age.

Computing the Climate and More
Richard C. J. Somerville
Science 14 January 2011: 149-150.
Edwards explores the use of computer simulations and models in climate research, and Winsberg offers a philosophical perspective on the roles of computer simulation in contemporary science.

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