Climate Letter #517

Heat and humidity outlook for the Persian Gulf region.  This region contains a number of high population centers, including Mecca, the Earth’s hottest large city.  This study projects what will happen by 2100 if we stay on the present track of emissions and their added warming effects, with a good explanation of what is meant by “wet-bulb” temperatures.  The paper concludes by saying countries in the region “stand to gain considerable benefits by supporting global mitigation efforts.”

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Extensive new study of how Greenland is melting.  This special feature from the NY Times online does not come to any dramatic conclusions, but provides a close look at what field scientists think is important, and what they are learning, along with some magnificent graphics.
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A new study of the Totten Glacier.  The research confirms that Antarctica’s largest glacier is melting from below, along with some pieces of new information, parts of which offers hope that the future path of instability is not as pronounced as that of the West Antarctica group of glaciers.  Reference is also made to the Aurora Basin, containing a vast sub-glacial body of ice that is mostly below sea level and connected to the Totten, about which little is known, but a potential worry.
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Alexandria, Egypt, population 4 million, has high exposure to both heavy flooding and sea level rise.  It is being held up as a leading example of extreme high risk that is clearly due to climate change, near-term as well as long.
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A new way to boost solar cell efficiency.  This idea, from the University of Connecticut, could potentially double the ability of solar cells to capture the sun’s radiation, much of which now goes unused.  The important point is that the technique does work in the lab, but it will still need field testing and improvisation for endurance.
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The pre-Paris negotiations in Bonn.  If you wonder what has been going on, besides wrangling, this story will help.  It’s mostly about plans for mobilizing the various financial needs of disadvantaged nations.  There was a final agreement about how best to proceed in Paris without letting emotions get out of hand.  Sort of a “test run,” apparently successful.
Carl

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