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DOI10.1175/JCLI-D-18-0019.1
Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States
Touma, Danielle1; Michalak, Anna M.2; Swain, Daniel L.3,4; Diffenbaugh, Noah S.1,5
2018-10-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:19页码:8023-8037
文章类型Article
语种英语
国家USA
英文摘要

The spatial extent of an extreme precipitation event can be important for a basin's hydrologic response and subsequent flood risk, and may yield insights into underlying atmospheric processes. Using a relaxed moving-neighborhood approach, we develop indicator semivariograms based on precipitation records from the Global Historical Climatology Network-Daily (GHCN-D) station network to directly quantify the climatological length scales of extreme daily precipitation over the United States during 1965-2014. We find that the length scales of extreme (90th percentile) daily precipitation events vary both regionally and seasonally. Over the eastern half of the United States, daily extreme precipitation length scales reach 400 km during the winter months, but are approximately half as large during the summer months. The Northwest region, on the other hand, exhibits little seasonal variation, with extreme precipitation length scales of approximately 150 km throughout the year. By leveraging in situ station measurements, our study avoids some of the uncertainties associated with satellite or interpolated precipitation data, and provides the longest climatological assessment of length scales of extreme daily precipitation over the United States to date. Although the length scales that we calculate can be sensitive to station density, neighborhood size, and neighborhood relaxation, we find that the interregional and interseasonal differences in length scales are relatively robust. Our method could be extended to quantify changes in the spatial extent of extreme daily precipitation in the recent past, and to investigate the underlying causes of any changes that are detected.


英文关键词North America Extreme events Precipitation
领域气候变化
收录类别SCI-E
WOS记录号WOS:000442564700002
WOS关键词NORTH-AMERICAN CLIMATE ; HIGH-RESOLUTION ; HOURLY PRECIPITATION ; MOVING WINDOW ; VARIABILITY ; EVENTS ; UNCERTAINTY ; PATTERNS ; MOISTURE ; WEATHER
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
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/20242
专题气候变化
作者单位1.Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA;
2.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA;
3.Univ Calif Los Angeles, Inst Environm & Sustainabil, Los Angeles, CA USA;
4.Nature Conservancy, 1815 N Lynn St, Arlington, VA USA;
5.Stanford Univ, Woods Inst Environm, Stanford, CA 94305 USA
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GB/T 7714
Touma, Danielle,Michalak, Anna M.,Swain, Daniel L.,et al. Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States[J]. JOURNAL OF CLIMATE,2018,31(19):8023-8037.
APA Touma, Danielle,Michalak, Anna M.,Swain, Daniel L.,&Diffenbaugh, Noah S..(2018).Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States.JOURNAL OF CLIMATE,31(19),8023-8037.
MLA Touma, Danielle,et al."Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States".JOURNAL OF CLIMATE 31.19(2018):8023-8037.
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