Climate Letter #956

Posted on July 12, 2017 by Carl Campbell
That big Larsen C iceberg has finally broken off.  Climate Central has a good assortment of pictures and insights into what it all means.

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Without mitigation, climate change will cause water shortages in the Southwest to be “severely accentuated” by 2050.  This comprehensive study compared 99 river basins across the US that are employed for agricultural irrigation.
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A different study looks at the impact of excessive groundwater pumping in the High Plains region.  This region produces one-third of the world’s grain supply.  It may come as a surprise that even river and stream flows are reduced by the pumping—everything dries out together.  Once the aquifer is drained the water available from that source will be gone for generations, regardless of surface rainfall.
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A brief report from Paul Ehrlich about the insidious nature of habitat destruction.  Paul was one of the authors of the major extinction study reviewed here yesterday.  His point about the pressures of overpopulation is well made but he could have added more about the harm done by constantly growing extravagance of human lifestyles in these times.
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New research into the carbon footprint of various human activities provides tips that are useful on an individual scale.  This very thorough study includes some surprises:  “They also looked at school textbook and government advice from across Europe, Canada the US and Australia and found that most policies focused on the strategies which had the least impact.”
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Joe Romm reacts to the doomsday report from New York magazine (CL#954.)   He observes that we are not doomed by climate change but at the moment we have chosen to be doomed because that is how we are voting.  Well said, along with much more good stuff that complements the magazine piece.  Joe is himself a climate scientist who for years has been one of the few to go out of his way to raise alarms.  (I think the denial propaganda machine has had a large role in preventing the public from accepting the claims of alarmists.  The machine was certainly strong enough to fill our Congress with its lackeys, which took a lot of time, money and tactical skill.)
Carl

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