Due to "when will the ice break up" contests in Alaska and other records dating back more than 150 years, climate scientists are able to study the onset of spring thaws.
Seventeen lakes in Europe, Asia and the U.S. with records going back 150 years are thawing, on average, 13 days earlier now than when first recorded, said Wisconsin lake scientist Barbara Benson.
Frustrating that there's no charts associated with the story; this is a case where a picture would be worth 1000 words.
Several very cool animations, graphs, and photos of Northern Hemisphere sea ice coverage are available from The Cryosphere Today. Among them: ice coverage time-lapse from 1978-2006 and 2007's ice retreat (the greatest ever recorded). (via ben saunders)
A report encompassing the work of thousands of climate experts says that "global warming will happen faster and be more devastating than previously thought". "The really chilling thing about the IPCC report is that it is the work of several thousand climate experts who have widely differing views about how greenhouse gases will have their effect. Some think they will have a major impact, others a lesser role. Each paragraph of this report was therefore argued over and scrutinised intensely. Only points that were considered indisputable survived this process. This is a very conservative document -- that's what makes it so scary."
The upper reaches of the northern hemisphere are warming so much that new islands are being discovered, including those once thought to be peninsula. "A peninsula long thought to be part of Greenland's mainland turned out to be an island when a glacier retreated."
Most of what we hear about global warming concerns the atmosphere and its carbon dioxide levels. In the New Yorker a few weeks ago, Elizabeth Kolbert wrote about what's happening in the ocean (not online, unfortunately it is online (thx, tim)). It turns out that like all tightly coupled systems, the ocean and the atmosphere like to be in equilibrium with each other, which means that the chemistry of the ocean is affected by the chemistry of the atmosphere. Much of the extra carbon dioxide pumped into the atmosphere by humans over the past two hundred years is being absorbed into the ocean and slowly making the ocean more acidic.
The CO2 dissolves, it produces carbonic acid, which has the chemical formula H2CO3. As acids go, H2CO3 is relatively innocuous -- we drink it all the time in Coke and other carbonated beverages -- but in sufficient quantities it can change the water's pH. Already, humans have pumped enough carbon into the oceans -- some hundred and twenty billion tons -- to produce a .1 decline in surface pH. Since pH, like the Richter scale, is a logarithmic measure, a .1 drop represents a rise in acidity of about thirty per cent.
As Kolbert later states, "from the perspective of marine life, the drop in pH matters less that the string of chemical reactions that follow". The increased levels of carbonic acid in the water means there are less carbonate ions available in seawater for making shells, meaning that thousands of species that build shells or skeletons from calcium carbonate are in danger of extinction. As a particularly troubling example, coral use calcium carbonate taken from the seawater to construct themselves. Climate modeller Ken Caldeira believes that if humans keep emitting carbon dioxide into the atmosphere at the same rate as today, by 2075 the world's coral reefs will begin to disappear because their rate of natural erosion will surpass their ability to grow fast enough to keep up.
The truly worrisome thing about all this is that the ocean is an extremely slow moving machine and that once in motion, it's difficult to stop or change its course.
Using 100% of the profits from his airline and transportation companies, Richard Branson pledges $3 billion to fight global warming over the next decade. Will the billionaire philanthropists save us from ourselves? BTW, this happened at the Clinton Global Initiative's annual meeting; there's a live webcast (+podcasts) if you want to watch from home.
A transcript of a speech by Al Gore at the NYU Law School on September 18th. In it, he made some suggestions for how to address the global warming problem. More on Gore's speech from the NY TImes.
Sources cited by The Independent say that George W. Bush is planning "astonishing U-turn" on his global warming policies, which, as Elizabeth Kolbert notes in this week's New Yorker, have been anything but helpful. Those who oppose Bush will give him a lot of crap for doing this just so he can salvage something from his shoddy Presidency, but if something genuinely gets done on the issue, I'll be happy...who gets credit for what and when needs to take a backseat here.
Could global warming kill the internet? "The internet is a big network of servers, and servers are hot. They devour electricity, they run hot and they mainline air conditioning. When the global thermostat goes up, the servers start going down." (via migurski)
Lengthy update on what Al Gore has been up to since the 2000 Presidential Election, including his work on global warming, documented in An Inconvenient Truth (my review).
"In the late 20th Century, the northern hemisphere experienced its most widespread warmth for 1,200 years". "The last 100 years is more striking than either [the Medieval Warm Period or Little Ice Age]."
Having not ratified the Kyoto Protocol, the US is now refusing to work on its successor. Says Elizabeth Kolbert, "Without the participation of the United States, no meaningful agreement can be drafted for the post-2012 period, and the world will have missed what may well be its last opportunity to alter course."
Scientists have extracted ice cores from Antarctica that date back 650,000 years (the previous high was 400,000 years). The cores show that modern levels of carbon dioxide, methane, and nitrous oxide levels are the highest they have ever been.
Elizabeth Kolbert (who wrote three articles for the NYer on global warming earlier in the year) discusses global warming as a possible cause for Hurricane Katrina. Like the climate scientists on RealClimate contend, Kolbert notes that no particular storm can be caused by global warming, but that the long-term patterns don't look good...increased greenhouse gases = warmer oceans = more destructive hurricanes. Paul Recer downplays the connection as well and cautions environmental groups who want to make political hay with scientific evidence that doesn't support their claims.
Part three of three of Elizabeth Kolbert's series on global warming for the New Yorker. This one's all about what we can and are/aren't doing about the situation.
The second of Elizabeth Kolbert's three-part series on global warming for the New Yorker. This one's about how relatively short-term climate change can affect entire civilizations.
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