Download PDF by William deBuys: A great aridness : climate change and the future of the

By William deBuys

ISBN-10: 0199778922

ISBN-13: 9780199778928

ISBN-10: 0199974675

ISBN-13: 9780199974672

With its hovering azure sky and stark landscapes, the yank Southwest is likely one of the so much hauntingly appealing areas in the world. but fabulous inhabitants progress, mixed with the intensifying results of weather switch, is using the oasis-based society as regards to the edge of a Dust-Bowl-scale catastrophe.

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Additional resources for A great aridness : climate change and the future of the American southwest

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He and his team had been looking at Asian monsoon variability in the nineteenth century, going back to 1856, the year the British and American navies began recording air and sea surface temperatures and winds from all their ships. Other navies and merchant marines eventually followed suit, making it possible to compile a nearly global century-and-a-half record of oceanic weather. Seager and his team drew upon that data to model relationships between sea surface temperature and changes in atmospheric circulation.

Oracle: Global-Change-Type Drought 43 The drought of the 1950s was longer and drier than that of the early 2000s, and it killed vast numbers of trees of multiple species, not only pines. But the later drought appears to have induced mortality at an even more spectacular scale. The key difference seems to have been temperature. 5 This increment is no more than the difference between the high 80s on the Fahrenheit scale and 90 or a little above—not the kind of thing a well-watered human might worry about.

Fairly quickly, Keeling made two important discoveries. He found that CO2 levels varied with the seasons. There was measurably less in the air during the Northern Hemisphere summer and more during the winter. It was a surprising observation, but one that was soon explained. Since the Northern Hemisphere holds most of Earth’s land mass and therefore most of its plant life, and since growing plants extract CO2 from the air, it made sense that when the world was most leafed out, CO2 should drop. No one had previously suspected this, let alone observed it; Keeling had not been looking for it.

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A great aridness : climate change and the future of the American southwest by William deBuys


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