干旱区生态环境知识资源中心(Arid): Examination of Global Midlatitude Atmospheric River Lifecycles Using an Object-Oriented Methodology

Arid

DOI	10.1029/2020JD033425
	Examination of Global Midlatitude Atmospheric River Lifecycles Using an Object-Oriented Methodology
	Shearer, Eric J.; Phu Nguyen; Sellars, Scott L.; Analui, Bita; Kawzenuk, Brian; Hsu, Kuo-lin; Sorooshian, Soroosh
通讯作者	Shearer, EJ
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2020
卷号	125 期号:22
英文摘要	Tracking atmospheric rivers (ARs) across their lifecycles is a field of recent interest with a multitude of emerging methodologies. The CONNected-objECT (CONNECT) algorithm is adapted for the tracking of global midlatitude AR lifecycles and associated precipitation by implementing a seeded region growing segmentation algorithm, creating the AR-CONNECT algorithm. To facilitate the permissiveness of the methodology, AR-CONNECT is without hard-coded geometric criteria yet is still shown to extract synoptic-scale elongated objects >99.99% of the time. One of the consequences of the methodology is the ability to occasionally track atmospheric water vapor anomalies before evolving into AR geometries, effectively tracking AR genesis further back than other studies. With the aid of subdaily satellite-derived rain data, we investigate the climatology, trends, and patterns of AR lifecycles from 1983-2016 and compare with other AR tracking studies. We find that AR frequency, genesis, and terminus locations are in generally good agreement with other AR tracking methodologies, though with key differences, and that AR frequencies in each hemisphere are determined by the number of AR hotspots. Furthermore, we uncover evidence that certain AR characteristics, such as frequency, areal extent, and duration, show evidence of increasing trends. Midlatitude precipitation uncovered by AR-CONNECT shows contributions up to 50% over land and 65% over the ocean. Trend analysis of AR precipitation shows an increase in precipitation associated with ARs propagated by the Southern Jet Stream and ARs that traverse over the Sahara Desert, among others, but is determined not to be a driver of changes in global precipitation.
英文关键词	atmospheric rivers atmospheric river tracking object‐ oriented analysis hydroclimate hydrometeorology synoptic‐ scale meteorology
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000595725700023
WOS关键词	INLAND PENETRATION ; CLIMATE-CHANGE ; NORTH PACIFIC ; PRECIPITATION ; SATELLITE ; ALGORITHM ; STRENGTH ; IMPACTS ; SCALE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327847
作者单位	[Shearer, Eric J.; Phu Nguyen; Analui, Bita; Hsu, Kuo-lin; Sorooshian, Soroosh] Univ Calif Irvine, Ctr Hydrometeorol & Remote Sensing CHRS, Dept Civil & Environm Engn, Henry Samueli Sch Engn, Irvine, CA 92697 USA; [Sellars, Scott L.] Univ Calif San Diego, Calif Inst Telecommun & Informat Technol Calit2, Qualcomm Inst, San Diego, CA 92103 USA; [Kawzenuk, Brian] Univ Calif San Diego, Ctr Western Weather & Water Extremes CW3E, Scripps Inst Oceanog, San Diego, CA 92103 USA; [Sorooshian, Soroosh] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA
推荐引用方式 GB/T 7714	Shearer, Eric J.,Phu Nguyen,Sellars, Scott L.,et al. Examination of Global Midlatitude Atmospheric River Lifecycles Using an Object-Oriented Methodology[J],2020,125(22).
APA	Shearer, Eric J..,Phu Nguyen.,Sellars, Scott L..,Analui, Bita.,Kawzenuk, Brian.,...&Sorooshian, Soroosh.(2020).Examination of Global Midlatitude Atmospheric River Lifecycles Using an Object-Oriented Methodology.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(22).
MLA	Shearer, Eric J.,et al."Examination of Global Midlatitude Atmospheric River Lifecycles Using an Object-Oriented Methodology".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.22(2020).