Arctic sea ice lost 65% of its thickness from 1975 to 2012. For September alone the average loss was 85%, virtually assuring an ice-free September not many years from now. During that same timespan (which followed a 30-year plateau) the Earth’s average global temperature rose by just a bit more than one-half degree C. That, along with several other equally dramatic impacts, like coral bleaching and Antarctica’s glacial crumblings, should tell you something about how powerful a punch can be thrown by “only” a half-degree rise. What will the next half degree produce? Or the one after that, both of which would still leave us just short of the so-called safety limit of 2C total increase since the 19th century? Will there be some surprises? (How many more big changes since 1975 can you think of?)
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The ice thinning continues this winter. Along with it we are witnessing a new record low for the extent of Arctic sea ice in late winter. The reasons for all this are well-described in this post from Robert Fanney. The winter warmth does not necessarily foretell how the summer season will develop, but it is hard to be an optimist right now.
For another look, check out this piece from the Arctic Sea Ice blog, and the bright commentaries that follow. These people take the subject very seriously indeed, and have lots of ideas to offer.
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What caused those craters in Siberia? There is a new theory, described in the second part of this post. I believe it makes more sense than the early theory of methane hydrate explosions. Russia’s new temperature records are certainly also a story worthy of note.
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A cheaper pathway to energy storage. Things like this may not seem dramatic but they can make a huge difference in bringing down costs.
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Space-based solar energy collection may be coming (but not real soon.) The technology is being actively pursued in Japan, and some progress has recently been accomplished. I think it has better prospects than the costly nuclear fusion program being pursued in the U.S. This post contains a website link with quite a bit more information.
Carl