Climate Letter #539

Posted on November 27, 2015 by Carl Campbell
An important new study regarding climate sensitivity.  The study provides evidence that atmospheric warming produces increased methane emissions from wetland areas as a common feedback.  Thus, if increased CO2 is making things warmer methane is almost sure to increase as well and make things warmer yet.  (That total is then further amplified, probably doubled, by resulting increases in water vapor, an extremely powerful greenhouse gas.)  Historical records do show that CO2 and methane generally moved up and down in tandem during the ice ages.  That may also remain true from now on, requiring a revision to forecasting models.

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Keeping track of the dangers from methane hydrates.  These mysterious entities are getting more attention than ever, and new information is being established.  No conclusions can be agreed upon for now except that they are dangerous and can be affected by the advancement of external changes such as those now occurring.
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A record-breaking hurricane.  This Category 4 storm is the latest of such size ever observed in the Western Hemisphere.  It becomes part of a general pattern of increasing record-breaking weather events that can be attributed to changing climate conditions.
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Sweden’s challenge to the rest of the world.  The leaders want their country to be 100 percent free of fossil fuels, saying so just on their own volition, without pledges or agreements, and absent the sense that some big sacrifice is necessary.  Their attitude, while quite unusual, is at least demonstrated as possible for a modern nation to adopt, and their reasoning should be studied by others.
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An update on lithium-sulfur batteries for electric cars.  Not quite ready for mass marketing, but a major drawback has been overcome.  This type of battery has several decisive advantages over the lithium-ion type, including cost.  Oak Ridge National Laboratory is bullish on their development.
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How glaciers behave.  If you have any kind of interest in glaciers this post has some imagery you will certainly want to see.  This is more about normal glaciers than those that are simply on their way to disappearing.
Carl

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