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http://guymcpherson.com/2013/01/climate-change-summary-and-update/

Climate-change summary and update

American actress Lily Tomlin is credited with the expression, “No matter how cynical you become, it’s never enough to keep up.” With respect to climate science, my own efforts to stay abreast are blown away every week by new data, models, and assessments. It seems no matter how dire the situation becomes, it only gets worse when I check the latest reports.

The response of politicians, heads of non-governmental organizations, and corporate leaders remains the same. They’re mired in the dank Swamp of Nothingness. These are the people who know about, and presumably could do something about, our ongoing race to disaster (if only to sound the alarm). Tomlin’s line is never more germane than when thinking about their pursuit of a buck at the expense of life on Earth.

Worse than the aforementioned trolls are the media. Fully captured by corporations and the corporate states, the media continue to dance around the issue of climate change. Occasionally a forthright piece is published, but it generally points in the wrong direction, such as suggesting climate scientists and activists be killed (e.g., James Delingpole’s 7 April 2013 hate-filled article in the Telegraph).

Even mainstream scientists minimize the message at every turn. As we’ve known for years, scientists almost invariably underplay climate impacts. I’m not implying conspiracy. Science selects for conservatism. Academia selects for extreme conservatism. These folks are loathe to risk drawing undue attention to themselves by pointing out there might be a threat to civilization. Never mind the near-term threat to our entire species (they couldn’t care less about other species). If the truth is dire, they can find another, not-so-dire version.

If you’re too busy to read the evidence presented below, here’s the bottom line: On a planet 4 C hotter than baseline, all we can prepare for is human extinction (from Oliver Tickell’s 2008 synthesis in the Guardian). According to an informed assessment of BP’s Energy Outlook 2030, published in January 2013, global average temperature of Earth will hit the 4 C mark in 2030. In the face of near-term human extinction, Americans view the threat as distant and irrelevant, as illustrated by a 22 April 2013 article in the Washington Post based on poll results that echo the long-held sentiment that elected officials should be focused on the industrial economy, not far-away minor nuisances such as climate change.

This essay brings attention to recent projections and positive feedbacks. I presented much of this information at the Bluegrass Bioneers conference (Alex Smith at Radio Ecoshock evaluates my presentation here). More recently, I presented an updated version on the campus of the University of Massachusetts. All information and sources are readily confirmed with an online search, and links to information about feedbacks can be found here.

Large-scale assessments

Intergovernmental Panel on Climate Change (late 2007): 1 C by 2100

Hadley Centre for Meteorological Research (late 2008): 2 C by 2100

United Nations Environment Programme (mid 2009): 3.5 C by 2100

Hadley Centre for Meteorological Research (October 2009): 4 C by 2060

Global Carbon Project, Copenhagen Diagnosis (November 2009): 6 C, 7 C by 2100

International Energy Agency (November 2010): 3.5 C by 2035

United Nations Environment Programme (December 2010): up to 5 C by 2050
These assessments fail to account for significant self-reinforcing feedback loops (i.e., positive feedbacks, the term that implies the opposite of its meaning). The IPCC’s vaunted Fifth Assessment will continue the trend as it, too, ignores important feedbacks. On a positive note, major assessments fail to account for economic collapse. However, due to the feedback loops presented below, I strongly suspect it’s too late for economic collapse to extend the run of our species.

Taking a broad view

Astrophysicists have long believed Earth was near the center of the habitable zone for humans. Recent research published in the 10 March 2013 issue of Astrophysical Journal indicates Earth is on the inner edge of the habitable zone, and lies within 1% of inhabitability (1.5 million km, or 5 times the distance from Earth to Earth’s moon). A minor change in Earth’s atmosphere removes human habitat. Unfortunately, we’ve invoked major changes.

The northern hemisphere is particularly susceptible to acclerated warming, as explained in the 8 April 2013 issue of Journal of Climate. Two days later, a paper in Nature confirmed that summers in the northern hemisphere are hotter than they’ve been for 600 years. As pointed out by Sherwood and Huber in the 25 May 2012 issue of the Proceedings of the National Academy of Sciences and then by James Hansen points out in his 15 April 2013 paper, humans cannot survive a wet-bulb temperature of 35 C (95 F).

As pointed out by the United Nations Advisory Group on Greenhouse Gases in 1990, “Beyond 1 degree C may elicit rapid, unpredictable and non-linear responses that could lead to extensive ecosystem damage” (link mirrored here). Planetary instruments indicate Earth has warmed about 1 C since the beginning of the industrial revolution. However, plants in the vicinity of Concord, Massachusetts — where the instrumental record indicates warming of about 1 C — indicate warming of 2.4 C since the 1840s.

Whether you believe the plants or the instruments is irrelevant at the point. We’ve clearly triggered the types of positive feedbacks the United Nations warned about in 1990. Yet my colleagues and acquaintances think we can and will work our way out of this horrific mess with permaculture (which is not to denigrate permaculture, the principles of which are implemented at the mud hut). Adding egregious insult to spurting wound, the latest public-education initiative in the United States — the Next Generation Science Standards — buries the relationship between combustion of fossil fuels and planetary warming. The misadventures of the corporate government continue.

Let’s ignore the models for a moment and consider only the results of a single briefing to the United Nations Conference of the Parties in Copenhagen (COP15). Regulars in this space will recall COP15 as the climate-change meetings thrown under the bus by the Obama administration. A footnote on that long-forgotten briefing contains this statement: “THE LONG-TERM SEA LEVEL THAT CORRESPONDS TO CURRENT CO2 CONCENTRATION IS ABOUT 23 METERS ABOVE TODAY’S LEVELS, AND THE TEMPERATURES WILL BE 6 DEGREES C OR MORE HIGHER. THESE ESTIMATES ARE BASED ON REAL LONG TERM CLIMATE RECORDS, NOT ON MODELS.”

In other words, Obama and others in his administration knew near-term extinction of humans was already guaranteed. Even before the dire feedbacks were reported by the scientific community, the Obama administration abandoned climate change as a significant issue because it knew we were done as early as 2009. Rather than shoulder the unenviable task of truth-teller, Obama did as his imperial higher-ups demanded: He lied about collapse, and he lied about climate change. And he still does.

Ah, those were the good ol’ days, back when atmospheric carbon dioxide concentrations were below 400 parts per million (ppm). We’ll blow through the 400 ppm mark soon, probably for the first time in 3.2 to 5 million years.

Positive feedbacks

Methane hydrates are bubbling out the Arctic Ocean (Science, March 2010)

Warm Atlantic water is defrosting the Arctic as it shoots through the Fram Strait (Science, January 2011). This breakdown of the thermohaline conveyor belt is happening in the Antarctic as well.

Siberian methane vents have increased in size from less than a meter across in the summer of 2010 to about a kilometer across in 2011 (Tellus, February 2011)

Drought in the Amazon triggered the release of more carbon than the United States in 2010 (Science, February 2011)

Peat in the world’s boreal forests is decomposing at an astonishing rate (Nature Communications, November 2011)

Methane is being released from the Antarctic, too (Nature, August 2012)

Russian forest and bog fires are growing (NASA, August 2012)

Cracking of glaciers accelerates in the presence of increased carbon dioxide (Journal of Physics D: Applied Physics, October 2012)

The Beauford Gyre apparently has reversed course (U.S. National Snow and Ice Data Center, October 2012)

Exposure to sunlight increases bacterial conversion of exposed soil carbon, thus accelerating thawing of the permafrost (Proceedings of the National Academy of Sciences, February 2013)

Summer ice melt in Antarctica is at its highest level in a thousand years: Summer ice in the Antarctic is melting 10 times quicker than it was 600 years ago, with the most rapid melt occurring in the last 50 years (Nature Geoscience, April 2013)

Arctic drilling was fast-tracked by the Obama administration during the summer of 2012
As nearly as I can distinguish, only the latter feedback process is reversible. Once you pull the tab on the can of beer, there’s no keeping the carbon dioxide from bubbling up and out. Because we’ve entered the era of expensive oil, I can’t imagine we’ll voluntarily terminate the process of drilling for oil and gas in the Arctic (or anywhere else).

See how far we’ve come

Never mind that American naturalist George Perkins Marsh predicted anthropogenic climate change as a result of burning fossil fuels in 1847. Never mind that climate risks have been underestimated for the last 20 Years, or that the IPCC’s efforts have failed miserably. After all, climate scientist Kevin Anderson tells us what I’ve known for years: politicians and the scientists writing official reports on climate change are lying, and we have less time than most people can imagine. Never mind David Wasdell pointed out in 2008 that we must have a period of negative radiative forcing merely to end up with a stable, non-catastrophic climate system. Never mind that even the Atlantic is displaying “five charts about climate change that should have you very, very worried.” Never mind that atmospheric carbon dioxide is affecting satellites. Never mind that even the occasional economic analyst is telling climate scientists to be persuasive, be brave, and be arrested. Never mind that Peruvian ice requiring 1,600 years to accumulate has melted in the last 25 years, according to a paper in the 4 April 2013 issue of Science.

Never mind all that: Future temperatures likely will be at the higher end of the projected range because the forecasts are all too conservative and also because climate negotiations won’t avert catastrophe.

Through late March 2013, global oceans have risen approximately ten millimeters per year during the last two years. This rate of rise is over three times the rate of sea level rise during the time of satellite-based observations from 1993 to the present.

Actually, catastrophe is already here, although it’s not widely distributed in the United States. Well, not yet, even though the continental U.S. experienced its highest temperature ever in 2012, shattering the 1998 record by a full degree Fahrenheit. But the east coast of North America experienced its hottest water temperatures all the way to the bottom of the ocean. The epic dust bowl of 2012 grew and grew and grew all summer long. Even James Hansen and Makiko Sato are asking whether the loss of ice on Greenland has gone exponential (while ridiculously calling for a carbon tax to “fix” the “problem”), and the tentative answer is not promising, based on very recent data. And climate change causes early death of 400,000 people each year.

Completely contrary to the popular contrarian myth, global warming has accelerated, with more overall global warming in the past 15 years than the prior 15 years. This warming has resulted about 90% of overall global warming going into heating the oceans, and the oceans have been warming dramatically, according to a paper published in the March 2013 issue of Geophysical Research Letters. About 30% of the ocean warming over the past decade has occurred in the deeper oceans below 700 meters, which is unprecedented over at least the past half century. The death spiral of Arctic sea ice is well under way, as shown in the video below.

Global loss of sea ice matches the trend in the Arctic. It’s down, down, and down some more, with the five lowest values on record all happening in the last seven years (through 2012).

Then see where we’re going

The climate situation is much worse than I’ve led you to believe, and is accelerating far more rapidly than accounted for by models. Ice sheet loss continues to increase at both poles, and warming of the West Antarctic Ice Sheet is twice the earlier scientific estimate. Arctic ice at all-time low, half that of 1980, and the Arctic lost enough sea ice to cover Canada and Alaska in 2012 alone. In short, summer ice in the Arctic is nearly gone. Furthermore, the Arctic could well be free of ice by summer 2015, an event that last occurred some three million years ago, before the genus Homo walked the planet. Indeed, Arctic ice could be gone in 2013, as predicted by climate scientist Paul Beckwith. Among the consequences of declining Arctic ice is extremes in cold weather in northern continents (thus illustrating why “climate change” is a better term than “global warming”). In a turn surprising only to mainstream climate scientists, Greenland ice is melting rapidly.

Even the conservative International Energy Agency (IEA) has thrown in the towel, concluding that “renewable” energy is not keeping up with the old, dirty standard sources. As a result, the IEA report dated 17 April 2013 indicates the development of low-carbon energy is progressing too slowly to limit global warming.

The Arctic isn’t Vegas — what happens in the Arctic doesn’t stay in the Arctic — it’s the planet’s air conditioner. Whereas nearly 80 calories are required to melt a gram of ice at 0 C, adding 80 calories to the same gram of water at 0 C increases its temperature to 80 C. Anthropogenic greenhouse-gas emissions add more than 2.5 trillion calories to Earth’s surface every hour (ca. 3 watts per square meter, continuously).

Ocean acidification associated with increased atmospheric carbon dioxide is proceeding at an unprecedented rate and could trigger mass extinction by itself. Already, half the Great Barrier Reef has died during the last three decades. And ocean acidification is hardly the only threat on the climate-change front. As one little-discussed example, atmospheric oxygen levels are dropping to levels considered dangerous for humans.

An increasing number of scientists agree that warming of 4 to 6 C causes a dead planet. And, they go on to say, we’ll be there by 2060. The ultra-conservative International Energy Agency, on the other hand, concludes that, “coal will nearly overtake oil as the dominant energy source by 2017 … without a major shift away from coal, average global temperatures could rise by 6 degrees Celsius by 2050, leading to devastating climate change.” At the 11:20 mark of this video, climate scientist Paul Beckwith indicates Earth could warm by 6 C within a decade. If you think his view is extreme, consider the reconstruction of regional and global temperature for the past 11,300 years published in Science in March 2013 ( see this graph at the link listed above ).....