气候变化领域集成服务门户(CCPortal): Four Atmospheric Circulation Regimes Over the North Pacific and Their Relationship to California Precipitation on Daily to Seasonal Timescales

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DOI	10.1029/2020GL087609
	Four Atmospheric Circulation Regimes Over the North Pacific and Their Relationship to California Precipitation on Daily to Seasonal Timescales
	Guirguis K.; Gershunov A.; DeFlorio M.J.; Shulgina T.; Delle Monache L.; Subramanian A.C.; Corringham T.W.; Ralph F.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Precipitation in California is highly variable and not well forecasted on subseasonal-to-seasonal (S2S) timescales. Understanding relationships between synoptic-scale atmospheric circulation and hydrometeorological extremes could improve predictability. This work demonstrates the importance of four North Pacific circulation regimes (called the NP4 modes) in modulating precipitation, flooding, and water resources in California. Here we demonstrate how, on daily timescales, interactions between the NP4 modes drive coastal flow that can result in dry conditions from atmospheric ridging or wet conditions associated with enhanced onshore flow and atmospheric river (AR) landfalls. Seasonally, the prevalence of certain NP4 phase relationships can tip the scale toward wet or dry conditions. Relationships between El Niño Southern Oscillation (ENSO) and the NP4 are explored, and we provide insight into the poorly forecasted Western US seasonal precipitation during the “Godzilla” El Niño winter of 2016 by examining climate-weather linkages in a historical context. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric pressure; Climatology; Water resources; Atmospheric circulation; Climate-weather; Dry condition; North Pacific; Phase relationships; Seasonal precipitations; Southern oscillation; Wet conditions; Atmospheric movements; air-sea interaction; atmospheric circulation; atmospheric moisture; climate conditions; extreme event; flooding; precipitation (climatology); Southern Oscillation; water resource; Pacific Ocean; Pacific Ocean (North)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169923
作者单位	Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California, San Diego, CA, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Guirguis K.,Gershunov A.,DeFlorio M.J.,et al. Four Atmospheric Circulation Regimes Over the North Pacific and Their Relationship to California Precipitation on Daily to Seasonal Timescales[J],2020,47(16).
APA	Guirguis K..,Gershunov A..,DeFlorio M.J..,Shulgina T..,Delle Monache L..,...&Ralph F.M..(2020).Four Atmospheric Circulation Regimes Over the North Pacific and Their Relationship to California Precipitation on Daily to Seasonal Timescales.Geophysical Research Letters,47(16).
MLA	Guirguis K.,et al."Four Atmospheric Circulation Regimes Over the North Pacific and Their Relationship to California Precipitation on Daily to Seasonal Timescales".Geophysical Research Letters 47.16(2020).