DOI: 10.1002/2017JD026683
论文题名: A comparison of the effects of El Niño and El Niño Modoki on subdaily extreme precipitation occurrences across the contiguous United States
作者: Yu L. ; Zhong S. ; Heilman W.E. ; Bian X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 14 起始页码: 7401
结束页码: 7415
语种: 英语
英文关键词: El Niño
; El Niño Modoki
; teleconnection
; U.S. extreme precipitation
英文摘要: Intense precipitation over a short duration is a major cause of flash floods. Using hourly rainfall data from the North America Land Data Assimilation System Phase 2 from 1979 to 2013, we compared the differences in the response of the subdaily extreme precipitation occurrences across the contiguous U.S. to strong anomalous warming over the eastern equatorial Pacific known as El Niño and over the central equatorial Pacific known as El Niño Modoki. For both types of anomalous equatorial Pacific warming, the teleconnection is much stronger in the cold season (November through April) than warm season (May through October). During the warm season, while both types correspond to an increase in subdaily extreme precipitation in areas of Texas and a decrease in some areas of the northern Plains, El Niño is associated with a significant increase in the northern Rockies and El Niño Modoki is associated with a decrease in the Intermountain West. During the cold season, the overall patterns are similar between the two types, with positive anomalies over much of the southern and negative anomalies over the northern U.S. However, large regional differences exist, with El Niño exerting a much stronger influence on subdaily extreme precipitation in the Atlantic and Gulf states as well as California, while the influence of El Niño Modoki is slightly broader over the Midwest. These differences can be largely explained by the vertical velocity, moisture convergence, and jet stream patterns induced by El Niño and El Niño Modoki episodes. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62623
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory for Polar Science of SOA, Polar Research Institute of China, Shanghai, China; Department of Geography, Environment and Spatial Sciences, Michigan State University, East Lansing, MI, United States; USDA Forest Service Northern Research Station, Lansing, MI, United States
Recommended Citation:
Yu L.,Zhong S.,Heilman W.E.,et al. A comparison of the effects of El Niño and El Niño Modoki on subdaily extreme precipitation occurrences across the contiguous United States[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)