GSTDTAP  > 气候变化
DOI10.1029/2019GL083177
Increased Fall Precipitation in the Southeastern United States Driven by Higher-Intensity, Frontal Precipitation
Bishop, Daniel A.1,2; Williams, A. Park1; Seager, Richard1
2019-07-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
卷号46期号:14页码:8300-8309
文章类型Article
语种英语
国家USA
英文摘要

During 1895-2018, fall precipitation increased by nearly 40% in the southeastern United States north of the Gulf of Mexico due to increased circulation around the western North Atlantic Subtropical High, which enhanced moisture transports into the region. We find here that these increases in southeastern U.S. fall precipitation manifested almost entirely as increases in precipitation intensity, not frequency. Further, the enhanced moisture transports increased precipitation totals far more on the highest-intensity precipitation days than on the lower-intensity days, leading to nearly all of the increase to be delivered on extreme (top-5% intensity) precipitation days. Eighty-seven percent of the fall precipitation increase was driven by non-tropical storms (mostly frontal), not tropical cyclones, though the proportion of precipitation falling as either storm type did not change. Further research is needed to evaluate whether these observed precipitation increases are likely to continue, stabilize, or reverse.


Plain Language Summary Fall precipitation increased over the twentieth century in the southeastern United States due to increased wind-driven moisture transport from the Gulf of Mexico. Although fall is tropical cyclone (hurricane) season, it was non-tropical storms (mostly frontal) that dominated the precipitation increase. Further, the fall precipitation increase manifested as an increase in storm intensity, not frequency. The most intense 5% of non-tropical storms accounted for nearly three quarters of the increase in fall precipitation in the southeastern United States during 1895-2018. Climate models project that warming-induced humidity increases will also intensify storms, which would add to the wind-driven intensification detected thus far. If the observed wind-driven increase in intense precipitation continues and is added to by the effects of rising humidity, severe flooding from extreme frontal storms could become more common and severe in this region.


英文关键词extreme precipitation frontal tropical cyclone fall southeastern United States flood
领域气候变化
收录类别SCI-E
WOS记录号WOS:000481818900048
WOS关键词FUTURE CHANGES ; CLIMATE ; EVENTS ; TRENDS ; US ; EXTREMES ; RAINFALL ; DROUGHT
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/185311
专题气候变化
作者单位1.Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964 USA;
2.Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA
推荐引用方式
GB/T 7714
Bishop, Daniel A.,Williams, A. Park,Seager, Richard. Increased Fall Precipitation in the Southeastern United States Driven by Higher-Intensity, Frontal Precipitation[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(14):8300-8309.
APA Bishop, Daniel A.,Williams, A. Park,&Seager, Richard.(2019).Increased Fall Precipitation in the Southeastern United States Driven by Higher-Intensity, Frontal Precipitation.GEOPHYSICAL RESEARCH LETTERS,46(14),8300-8309.
MLA Bishop, Daniel A.,et al."Increased Fall Precipitation in the Southeastern United States Driven by Higher-Intensity, Frontal Precipitation".GEOPHYSICAL RESEARCH LETTERS 46.14(2019):8300-8309.
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