Climate Change

Bamber JL, Aspinall WP. An expert judgement assessment of future sea level rise from the ice sheets. Nature Clim Change;advance online publication. http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate1778.html

A major gap in predictive capability concerning the future evolution of the ice sheets was identified in the Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change. As a consequence, it has been suggested that the AR4 estimates of future sea-level rise from this source may have been underestimated. Various approaches for addressing this problem have been tried, including semi-empirical models and conceptual studies. Here, we report a formalized pooling of expert views on uncertainties in future ice-sheet contributions using a structured elicitation approach. We find that the median estimate of such contributions is 29?cm—substantially larger than in the AR4—while the upper 95th percentile value is 84?cm, implying a conceivable risk of a sea-level rise of greater than a metre by 2100. On the critical question of whether recent ice-sheet behaviour is due to variability in the ice sheet–climate system or reflects a long-term trend, expert opinion is shown to be both very uncertain and undecided.
 
[ame=http://www.youtube.com/watch?v=m9wM-p8wTq4]Jeremy Rifkin on global issues and the future of our planet - YouTube[/ame]
 
Coumou D, Robinson A, Rahmstorf S. Global increase in record-breaking monthly-mean temperatures. Climatic Change 2013:1-12. Global increase in record-breaking monthly-mean temperatures - Online First - Springer

The last decade has produced record-breaking heat waves in many parts of the world. At the same time, it was globally the warmest since sufficient measurements started in the 19th century. Here we show that, worldwide, the number of local record-breaking monthly temperature extremes is now on average five times larger than expected in a climate with no long-term warming. This implies that on average there is an 80 % chance that a new monthly heat record is due to climatic change. Large regional differences exist in the number of observed records. Summertime records, which are associated with prolonged heat waves, increased by more than a factor of ten in some continental regions including parts of Europe, Africa, southern Asia and Amazonia. Overall, these high record numbers are quantitatively consistent with those expected for the observed climatic warming trend with added stationary white noise. In addition, we find that the observed records cluster both in space and in time. Strong El Niño years see additional records superimposed on the expected long-term rise. Under a medium global warming scenario, by the 2040s we predict the number of monthly heat records globally to be more than 12 times as high as in a climate with no long-term warming.
 
Ellwood ER, Temple SA, Primack RB, Bradley NL, Davis CC. Record-Breaking Early Flowering in the Eastern United States. PLoS ONE 2013;8(1):e53788. PLOS ONE: Record-Breaking Early Flowering in the Eastern United States

Flowering times are well-documented indicators of the ecological effects of climate change and are linked to numerous ecosystem processes and trophic interactions. Dozens of studies have shown that flowering times for many spring-flowering plants have become earlier as a result of recent climate change, but it is uncertain if flowering times will continue to advance as temperatures rise. Here, we used long-term flowering records initiated by Henry David Thoreau in 1852 and Aldo Leopold in 1935 to investigate this question. Our analyses demonstrate that record-breaking spring temperatures in 2010 and 2012 in Massachusetts, USA, and 2012 in Wisconsin, USA, resulted in the earliest flowering times in recorded history for dozens of spring-flowering plants of the eastern United States. These dramatic advances in spring flowering were successfully predicted by historical relationships between flowering and spring temperature spanning up to 161 years of ecological change. These results demonstrate that numerous temperate plant species have yet to show obvious signs of physiological constraints on phenological advancement in the face of climate change.
 
Nicolaus M, Katlein C, Maslanik J, Hendricks S. Changes in Arctic sea ice result in increasing light transmittance and absorption. Geophysical Research Letters 2012;39(24). Changes in Arctic sea ice result in increasing light transmittance and absorption - Nicolaus - 2012 - Geophysical Research Letters - Wiley Online Library

Arctic sea ice has declined and become thinner and younger (more seasonal) during the last decade. One consequence of this is that the surface energy budget of the Arctic Ocean is changing. While the role of surface albedo has been studied intensively, it is still widely unknown how much light penetrates through sea ice into the upper ocean, affecting sea-ice mass balance, ecosystems, and geochemical processes. Here we present the first large-scale under-ice light measurements, operating spectral radiometers on a remotely operated vehicle (ROV) under Arctic sea ice in summer. This data set is used to produce an Arctic-wide map of light distribution under summer sea ice. Our results show that transmittance through first-year ice (FYI, 0.11) was almost three times larger than through multi-year ice (MYI, 0.04), and that this is mostly caused by the larger melt-pond coverage of FYI (42 vs. 23 %). Also energy absorption was 50% larger in FYI than in MYI. Thus, a continuation of the observed sea-ice changes will increase the amount of light penetrating into the Arctic Ocean, enhancing sea-ice melt and affecting sea-ice and upper-ocean ecosystems.
 
How Much Will Tar Sands Oil Add to Global Warming?
How Much Will Tar Sands Oil Add to Global Warming?: Scientific American

His [James Hansen] acts of civil disobedience started in 2009, and he was first arrested in 2011 for protesting the development of Canada's tar sands and, especially, the Keystone XL pipeline proposal that would serve to open the spigot for such oil even wider. "To avoid passing tipping points, such as initiation of the collapse of the West Antarctic Ice Sheet, we need to limit the climate forcing severely. It's still possible to do that, if we phase down carbon emissions rapidly, but that means moving expeditiously to clean energies of the future," he explains. "Moving to tar sands, one of the dirtiest, most carbon-intensive fuels on the planet, is a step in exactly the opposite direction, indicating either that governments don't understand the situation or that they just don't give a damn."
 
Eyes Turn to Antarctica as Study Shows Greenland’s Ice Has Endured Warmer Climates
Eyes Turn to Antarctica as Study Shows Greenland's Ice Has Endured Warmer Climates - NYTimes.com

An important discussion is developing among climate and polar researchers around the central point of a landmark Nature paper on Greenland conditions during Earth’s last (very warm) interval between ice ages. The paper, in which a critically important Greenland ice core is analyzed by 133 authors from a host of research centers, concludes that the vast ice sheet largely endured over a period of 6,000 years that was warmer than what is forecast for coming decades.

The new research suggests we need to be more concerned about Antarctica.


Eemian interglacial reconstructed from a Greenland folded ice core. Nature 2012;493(7433):489-94. http://www.nature.com/nature/journal/v493/n7433/full/nature11789.html

Efforts to extract a Greenland ice core with a complete record of the Eemian interglacial (130,000 to 115,000 years ago) have until now been unsuccessful. The response of the Greenland ice sheet to the warmer-than-present climate of the Eemian has thus remained unclear. Here we present the new North Greenland Eemian Ice Drilling (‘NEEM’) ice core and show only a modest ice-sheet response to the strong warming in the early Eemian. We reconstructed the Eemian record from folded ice using globally homogeneous parameters known from dated Greenland and Antarctic ice-core records. On the basis of water stable isotopes, NEEM surface temperatures after the onset of the Eemian (126,000 years ago) peaked at 8?±?4 degrees Celsius above the mean of the past millennium, followed by a gradual cooling that was probably driven by the decreasing summer insolation. Between 128,000 and 122,000 years ago, the thickness of the northwest Greenland ice sheet decreased by 400?±?250 metres, reaching surface elevations 122,000 years ago of 130?±?300 metres lower than the present. Extensive surface melt occurred at the NEEM site during the Eemian, a phenomenon witnessed when melt layers formed again at NEEM during the exceptional heat of July 2012. With additional warming, surface melt might become more common in the future.
 
Cory RM, Crump BC, Dobkowski JA, Kling GW. Surface exposure to sunlight stimulates CO2 release from permafrost soil carbon in the Arctic. Proceedings of the National Academy of Sciences. Surface exposure to sunlight stimulates CO2 release from permafrost soil carbon in the Arctic

Recent climate change has increased arctic soil temperatures and thawed large areas of permafrost, allowing for microbial respiration of previously frozen C. Furthermore, soil destabilization from melting ice has caused an increase in thermokarst failures that expose buried C and release dissolved organic C (DOC) to surface waters. Once exposed, the fate of this C is unknown but will depend on its reactivity to sunlight and microbial attack, and the light available at the surface. In this study we manipulated water released from areas of thermokarst activity to show that newly exposed DOC is >40% more susceptible to microbial conversion to CO2 when exposed to UV light than when kept dark. When integrated over the water column of receiving rivers, this susceptibility translates to the light-stimulated bacterial activity being on average from 11% to 40% of the total areal activity in turbid versus DOC-colored rivers, respectively. The range of DOC lability to microbes seems to depend on prior light exposure, implying that sunlight may act as an amplification factor in the conversion of frozen C stores to C gases in the atmosphere.


Melting Tundra Releases Carbon Dioxide Quickly
Previous estimates of how fast greenhouse gases get to the atmosphere from melting permafrost underestimated the work of soil bacteria
Melting Tundra Releases Carbon Dioxide Quickly: Scientific American
 
How Donors Trust distributed millions to anti-climate groups
The secretive funding network distributed $118m to 102 groups including some of the best-known thinktanks on the right
How Donors Trust distributed millions to anti-climate groups | Environment | guardian.co.uk

The secretive funding channel known as the Donors Trust patronised a host of conservative causes.

But climate was at the top of the list. By 2010, Donors Trust had distributed $118m to 102 thinktanks or action groups which have a record of denying the existence of a human factor in climate change, or opposing environmental regulations.

Recipients included some of the best-known thinktanks on the right. The American Enterprise Institute, which is closely connected to the Republican party establishment and has a large staff of scholars, received more than $17m in untraceable donations over the years, the record show.

But relatively obscure organisations did not go overlooked. The Heartland Institute, virtually unknown outside the small world of climate politics, received $13.5m from the Donors Trust.

Americans for Prosperity, the Tea Party group seen as the strike force of the conservative oil billionaire Koch Brothers, received $11m since 2002.
 
How Donors Trust distributed millions to anti-climate groups
The secretive funding network distributed $118m to 102 groups including some of the best-known thinktanks on the right
How Donors Trust distributed millions to anti-climate groups | Environment | guardian.co.uk

Good for them. It takes money to fight back against a propaganda machine that has media support, UN support, international government support, and lacks scientific support. Funny how Michael Mann did not sue National Review when they refused to take down their piece about him. All they had to do was mention to words: discovery phase. "Dr. Mann" knew that would mean he would have to provide his methodology to the court and the whole BS of climate change caused by humans would have been exposed. Good for NR as well.

Keep that cash coming. Fighting PR campaigns, especially BS ones where the prize is lots of money for the international elite, is going to take some serious funding. Consider giving to these same organizations. I know I do.
 
Carbon Conundrum
Governments struggle to find best path to cut greenhouse gases, limit climate-change impacts
http://cen.acs.org/articles/91/i7/Carbon-Conundrum.html
 
I like Doug Stanhopes view on the subject [:o)]

[ame=http://www.youtube.com/watch?v=QjsikRTIX28]Doug stanhope on overpopulation - abortion is green, try Sodomy - YouTube[/ame]
 
Unlocking the Conspiracy Mind-Set
Unlocking the Conspiracy Mind-Set - NYTimes.com

FEBRUARY 21, 2013, 7:34 AM
By JUSTIN GILLIS

When I first met the NASA climate researcher Gavin Schmidt a few years ago, we discussed the proliferation of material on the Internet attacking mainstream climate science. I asked him whether he thought climate contrarians were flirting with conspiracy theory in their views.

“Flirting?” he said. “No. They’ve already had conspiracy theory out on a hot date, and now it’s the morning after and they’re sitting up in bed, having coffee.”

I happened to recall that conversation the other day as I read the latest chapter of a remarkable back-and-forth between mainstream researchers and climate contrarians.

It all started last year, when a social scientist named Stephan Lewandowsky, of the University of Western Australia, and two colleagues published a rather provocative paper. It was based on an anonymous Internet survey of the readers of climate blogs.

The title alone will give you a sense of the findings: “NASA Faked the Moon Landings – Therefore (Climate) Science is a Hoax.” The subtitle was “An Anatomy of the Motivated Rejection of Science.”

The strongest finding in the survey was that ideological belief in an unregulated free market tended to be a predictor of someone’s willingness to reject the findings of mainstream climate research. No great surprise there. It was the secondary findings that set off a brouhaha.

Dr. Lewandowsky’s survey results suggested that people who rejected climate science were more likely than other respondents to reject other scientific or official findings and buy into assorted fringe theories: that NASA faked the moon landing, that the Central Intelligence Agency killed Martin Luther King Jr., that the AIDS virus was unleashed by the government, and so forth.

This piece of research appeared in a specialized journal in psychological science, but it did not take long to find its way onto climate skeptics’ blogs, setting off howls of derision.

A theory quickly emerged: that believers in climate science had been the main people taking Dr. Lewandowsky’s survey, but instead of answering honestly, had decided en masse to impersonate climate contrarians, giving the craziest possible answers so as to make the contrarians look like whack jobs.

So, a paper about a tendency among this group to believe in conspiracy theories was met by … a conspiracy theory.

Dr. Lewandowsky and his collaborators were taken aback, but not for long. As far-fetched ideas about the survey ricocheted around the Internet, they realized that manna was falling on them from heaven.

They started collecting the relevant blog posts, attempting to trace ideas to their origin, and observing how readily new conspiracy theories were embraced by the contrarians.

The result is yet another paper, just out recently. Again, the title tells the tale: “Recursive fury: Conspiracist ideation in the blogosphere in response to research on conspiracist ideation.”

Now, I will confess to being a bit of a skeptic myself about the value of Internet surveys, which tend to draw a self-selected population of respondents. And the only science I follow closely these days is physical research into the climate system, so I will let others with more expertise in the social sciences judge the merits of these papers.

But for sheer entertainment, they are both great reads – especially the second one, with its long passages about how the minds of conspiracy theorists work to seal off doubt and contrary evidence.

The heart of the second paper is a narrative of the eruption of various theories regarding the first paper, with elements of conspiratorial thinking explicitly identified in each case. Before the fever died down, one blogger was comparing Australian climate research to Soviet political repression, spinning a web of treachery that involved the Australian government, the University of Western Australia, the Australian Broadcasting Corporation and other groups.

(Judging from some of the e-mail I get, The New York Times is also seen in some quarters as part of a global plot to foist a scientific hoax on the public.)

Parts of this second paper remind me of the timeless Richard Hofstadter essay, “The Paranoid Style in American Politics,” which is, by the way, essential reading for anyone trying to understand the influence of climate denialism on modern American or Australian or British politics. It was written in the early 1960s and contains not a word about climate change, but anyone who has followed the climate wars closely will recognize a lot of the themes in the essay.

When I recently reminded Dr. Schmidt of our conversation from a few years back, he replied that it was “worth pointing out that just because an argument is used by a conspiracy theorist doesn’t make it wrong, and that just because someone agrees with a conspiracy theorist on something, it doesn’t make them a crank.”

Indeed, some of the strongest online reaction to Dr. Lewandowsky’s original paper came from intelligent climate contrarians who were offended at being labeled part of the tinfoil hat brigade. Whatever you think of their position on global warming, some of them have remarkable statistical skills and have made contributions, generally modest, to the scientific literature.

And yet, in other corners of the climate contrarian movement, words like “conspiracy” and “hoax” keep cropping up. Sen. James Inhofe, an Oklahoma Republican who is the standard-bearer for the climate contrarians in Congress, scored a double last year in the title of a book he published: “The Greatest Hoax: How the Global Warming Conspiracy Threatens Your Future.”
 
Lewandowsky S, Cook J, Oberauer K, Hubble M. Recursive fury: Conspiracist ideation in the blogosphere in response to research on conspiracist ideation. Frontiers in Psychology 2013;4. Frontiers | Recursive fury: Conspiracist ideation in the blogosphere in response to research on conspiracist ideation | Frontiers in Personality Science and Individual Differences

Conspiracist ideation has been repeatedly implicated in the rejection of scientific propositions, although empirical evidence to date has been sparse. A recent study involving visitors to climate blogs found that conspiracist ideation was associated with the rejection of climate science and the rejection of other scientific propositions such as the link between lung cancer and smoking, and between HIV and AIDS (Lewandowsky, Oberauer, & Gignac, in press; LOG12 from here on). This article analyzes the response of the climate blogosphere to the publication of LOG12. We identify and trace the hypotheses that emerged in response to LOG12 and that questioned the validity of the paper's conclusions. Using established criteria to identify conspiracist ideation, we show that many of the hypotheses exhibited conspiratorial content and counterfactual thinking. For example, whereas hypotheses were initially narrowly focused on LOG12, some ultimately grew in scope to include actors beyond the authors of LOG12, such as university executives, a media organization, and the Australian government. The overall pattern of the blogosphere's response to LOG12 illustrates the possible role of conspiracist ideation in the rejection of science, although alternative scholarly interpretations may be advanced in the future
 
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