Climate Letter #728

Some statistics on the global increase in drought conditions.  This particular report is mainly about the challenges of developing practical resilience to drought, especially in Africa, where a big conference has just been held, with almost nothing said by way of a connection to global warming.  What’s interesting is the statistical summary:  “Moreover, scientists have estimated that the fraction of land surface area experiencing drought conditions has grown from 10-15 per cent in the early 1970s to more than 30 per cent by early 2000, and these figures are expected to increase in the foreseeable future.”  About two-thirds of African lands are now either desert or dry-lands, being among the hardest hit when El Nino occurs.  It seems obvious that global warming is the ultimate cause of this rapid expansion and its expectedly faster continuation, with truly disastrous consequences being measured by passage of just a handful of decades.

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A demonstration of how fragile the Earth’s climate is. This happened 200 years ago, when Mt. Tambora blew its top.  It is discussed here as a potential model for geoengineering as a crisis solution.
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A novel approach to sequestering CO2, and more.  This link opens up to a commentary (#28) in the Skeptical Science website, one that attracts a following from some very interesting people who are scientifically inclined.  “RedBaron” is one of those people.  What he has to say about grassland agriculture in this lengthy commentary, full of supportive links, is deeply interesting, with an idea surely worth more attention than so far received.  Take a look, and then roam through the other comments on this same website and reread the basic article, which first appeared in the Guardian about a week ago and was repeated here in CL#724.  (The Guardian has received an extraordinary 677 comments in response, of a more popular sort than seen here, which indicates that the main author, Dana Nuccitelli, struck a chord on a difficult subject that is being taken seriously by more and more folks.)
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A huge ice shelf off the coast of Antarctica is making a move toward breaking up.  The Larsen C shelf on the edge of the Peninsula will soon lose about 10% of its mass, leaving the remainder in a weakened condition.  The smaller nearby Larsen B shelf made headlines when it broke up in 2002.
Carl

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