气候变化领域集成服务门户(CCPortal): Dusty atmospheric rivers: Characteristics and origins

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DOI	10.1175/JCLI-D-20-0059.1
	Dusty atmospheric rivers: Characteristics and origins
	Voss K.K.; Evan A.T.; Prather K.A.; Ralph F.M.
发表日期	2020
ISSN	0894-8755
起始页码	9749
结束页码	9762
卷号	33 期号:22
英文摘要	Atmospheric rivers (AR) are narrow bands of strong horizontal transport of water vapor in the midlatitudes that can cause extreme precipitation, which contributes to beneficial water supply and sometimes flooding. The precipitation productivity of an AR is affected by microphysical processes, including the influence of aerosols. Earlier case studies have shown that some ARs over the North Pacific Ocean contain dust from Africa and Asia that can strongly influence precipitation by acting as ice nuclei. This paper explores how commonly dust and ARs occur together, or in close proximity. A ‘‘dust score’’ is introduced to characterize the dustiness of the environment associated with ARs by using satellite-based observations. This method is applied to days on which one or more ARs made landfall along the west coast of the United States between 2001 and 2018. The dust score is used to describe the seasonality and year-to-year variability of dusty-environment ARs. Dusty ARs occur primarily in the early spring (March–April), and dust is preferentially found within the warm sector of AR-associated extratropical cyclones and is also enhanced in the cold sector. Year-to-year variability in dust score is dependent more on year-to-year variability in dust than on the frequency of AR days. This year-to-year variability is also strongly related to correlations between the frequency of ARs and the dustiness of the northeastern Pacific, motivating additional investigation into potential dynamical association between dust and ARs. © 2020 American Meteorological Society.
英文关键词	Precipitation (meteorology); Storms; Water supply; Close proximity; Extratropical cyclones; Extreme precipitation; Horizontal transport; Microphysical process; North Pacific Ocean; North-eastern Pacific; Satellite based observations; Dust; aerosol; atmospheric moisture; extratropical cyclone; satellite data; seasonal variation; water supply; water vapor; Pacific Ocean; Pacific Ocean (North); United States
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/171045
作者单位	Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; Department of Chemistry and Biochemistry, Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
推荐引用方式 GB/T 7714	Voss K.K.,Evan A.T.,Prather K.A.,et al. Dusty atmospheric rivers: Characteristics and origins[J],2020,33(22).
APA	Voss K.K.,Evan A.T.,Prather K.A.,&Ralph F.M..(2020).Dusty atmospheric rivers: Characteristics and origins.Journal of Climate,33(22).
MLA	Voss K.K.,et al."Dusty atmospheric rivers: Characteristics and origins".Journal of Climate 33.22(2020).