气候变化领域集成服务门户(CCPortal): Statistical relationship between atmospheric rivers and extratropical cyclones and anticyclones

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DOI	10.1175/JCLI-D-19-0126.1
	Statistical relationship between atmospheric rivers and extratropical cyclones and anticyclones
	Guo Y.; Shinoda T.; Guan B.; Waliser D.E.; Chang E.K.M.
发表日期	2020
ISSN	0894-8755
起始页码	7817
结束页码	7834
卷号	33 期号:18
英文摘要	Statistical relationships between atmospheric rivers (ARs) and extratropical cyclones and anticyclones are investigated on a global scale using objectively identified ARs, cyclones, and anticyclones during 1979–2014. Composites of circulation and moisture fields around the ARs show that a strong cyclone is located poleward and westward of the AR centroid, which confirms the close link between the AR and extratropical cyclone. In addition, a pronounced anticyclone is found to be located equatorward and eastward of the AR, whose presence together with the cyclone leads to strong horizontal pressure gradient that forces moisture to be transported along a narrow corridor within the warm sector of the cyclone. This anticyclone located toward the downstream equatorward side of the cyclone is found to be missing for cyclones not associated with ARs. These key features are robust in composites performed in different hemispheres, over different ocean basins, and with respect to different AR intensities. Furthermore, correlation analysis shows that the AR intensity is much better correlated with the pressure gradient between the cyclone and anticyclone than with the cyclone/ anticyclone intensity alone, although stronger cyclones favor the occurrence of AR. The importance of the horizontal pressure gradient in the formation of the AR is also consistent with the fact that climatologically ARs are frequently found over the region between the polar lows and subtropical highs in all seasons. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Moisture; Pressure gradient; Correlation analysis; Extratropical cyclones; Global scale; Horizontal pressure; Key feature; Moisture field; Ocean basins; Statistical relationship; Storms; anticyclone; atmospheric circulation; atmospheric moisture; extratropical cyclone; pressure gradient; statistical analysis
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171133
作者单位	Department of Physical and Environmental Science, Texas A&M University–Corpus Christi, Corpus Christi, TX, United States; Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, NY, United States
推荐引用方式 GB/T 7714	Guo Y.,Shinoda T.,Guan B.,et al. Statistical relationship between atmospheric rivers and extratropical cyclones and anticyclones[J],2020,33(18).
APA	Guo Y.,Shinoda T.,Guan B.,Waliser D.E.,&Chang E.K.M..(2020).Statistical relationship between atmospheric rivers and extratropical cyclones and anticyclones.Journal of Climate,33(18).
MLA	Guo Y.,et al."Statistical relationship between atmospheric rivers and extratropical cyclones and anticyclones".Journal of Climate 33.18(2020).