Anthropogenic megadrought

Anthropogenic megadrought
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人为特大干旱

DOI:
10.1126/science.abb6902
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发表时间:
2020
期刊:
影响因子:
56.9
通讯作者:
Stahle, David W.
Stahle, David W.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Stahle, David W.

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来自新西班牙北方边境(现在的美国西南部)的西班牙恩特拉达的历史文献包括世纪后期异常干旱的轶事证据(1)。然而,直到最近才从加拿大,美国和墨西哥开发的数百个精确的日期和湿度敏感的树木年轮年表中获得了16世纪的定量记录。第314章这一次,威廉(2)对美国西南部的代用气候数据进行了新的评估。他们确定,16世纪的特大干旱是过去1200年来西南部最严重的数十年干旱事件,第二严重的事件发生在2000年至2018年的北美西南部(SWNA),并可能正在进行中。该研究还指出了人类活动对当前干旱严重程度的重大影响。
Historical documents from the Spanish Entrada on the northern frontier of New Spain (now the U.S. Southwest) include anecdotal evidence for unusual aridity in the late 16th century (1). However, a quantitative record of the 16th-century megadrought has only recently been obtained from hundreds of exactly dated and moisture-sensitive tree-ring chronologies developed across Canada, the United States, and Mexico. On page 314 of this issue, Williamset al.(2) provide a new assessment of proxy climate data from the U.S. Southwest. They determine that the 16th-century megadrought was the worst multidecadal drought episode in the Southwest over the past 1200 years, and that the second-worst event occurred from 2000 to 2018 over southwestern North America (SWNA) and may be ongoing. The study also pinpoints substantial anthropogenic (human) contribution to the severity of the current drought.
DOI: 10.2737/wo-gtr-93b
发表时间: 2016
影响因子: 5.4
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