Multicentury Evaluation of Recovery from Strong Precipitation Deficits in California
Multicentury Evaluation of Recovery from Strong Precipitation Deficits in California
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DOI：
10.1175/jcli-d-16-0423.1
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发表时间：
2017-07
影响因子：
4.9
通讯作者：
E. Wahl;H. Diaz;R. Vose;W. Gross
中科院分区：
文献类型：
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作者：
E. Wahl;H. Diaz;R. Vose;W. Gross
最近加州的干旱在仪器记录中是前所未有的。本文采用加利福尼亚的空间明确降水重建与仪器数据相结合，提供了自1571年以来这一事件的视角。2012 - 2015年期间，在中央山谷南部和南部海岸地区尤为极端。这段时间可能经历了前所未有的降水不足，除了考虑温度上升和结合温度和湿度信息的干旱指标。在这四年中，一些地区失去了超过两年的平均水分输送，而在受灾最严重的地区，完全恢复到长期平均水分输送通常需要几十年的时间。这些结果突出了古记录提供的额外世纪信息的价值，这表明较短的仪器记录可能低估了全州范围内恢复时间的30%以上。极端的厄尔尼诺现象…
AbstractThe recent dryness in California was unprecedented in the instrumental record. This article employs spatially explicit precipitation reconstructions for California in combination with instrumental data to provide perspective on this event since 1571. The period 2012–15 stands out as particularly extreme in the southern Central Valley and south coast regions. which likely experienced unprecedented precipitation deficits over this time, apart from considerations of increasing temperatures and drought metrics that combine temperature and moisture information. Some areas lost more than two years’ average moisture delivery during these four years, and full recovery to long-term average moisture delivery could typically take up to several decades in the hardest-hit areas. These results highlight the value of the additional centuries of information provided by the paleo record, which indicates the shorter instrumental record may underestimate the statewide recovery time by over 30%. The extreme El Nino t...