干旱区生态环境知识资源中心(Arid): Cutoff low over the southeastern Pacific Ocean: a case study

Arid

DOI	10.1071/ES19051
	Cutoff low over the southeastern Pacific Ocean: a case study
	Quispe-Gutierrez, Nelson; Aliaga-Nestares, Vannia; Rodriguez-Zimmermann, Diego; Bonshoms, Marti; Loayza, Raquel; Garcia, Teresa; Mesia, Jose; Duran, Ricardo; Olivares, Sara
通讯作者	Quispe-Gutierrez, N (corresponding author), Serv Nacl Meteorol & Hidrol SENAMHI, Jr Cahuide 785 Jesus Maria, Lima, Peru.
来源期刊	JOURNAL OF SOUTHERN HEMISPHERE EARTH SYSTEMS SCIENCE
EISSN	2206-5865
出版年	2021
卷号	71 期号:1 页码:17-29
英文摘要	Cutoff lows (COLs) are infrequent events in the tropics that can cause extreme rainfall, flash flooding and landslides in arid areas, such as western South America. In this study, the life cycle of a COL in the southeastern Pacific at the beginning of April 2012 was analysed using the ERA-Interim reanalysis dataset. This paper examines: (1) the precursor flow evolution prior to the COL, its development and dissipation by applying the quasi-geostrophic and vorticity equations; and (2) the influence of the COL in the heavy precipitation events over the western Peruvian Andes. During April 2012, the highest amount of precipitation was recorded in Chosica (850 masl) with 37 mm on 5 April. Days prior to the formation of the COL, a subtropical trough deepened by the amplification of a ridge over the tropical Pacific and the incursion of cold air from medium and low levels into the trough. The strong cyclonic vorticity advection was intensified by a short-wave trough embedded inside a long-wave one that strengthened the system on 5 April 2012. In the dissipation stage, warm vertical advection predominated, resulting in the reabsorption of the COL by a new trough. Understanding the behaviour COL systems is important for reducing the impact of these extreme weather events on lives and infrastructure in densely populated areas.
英文关键词	Andes cordillera Chosica Cutoff low extreme rainfall Peru quasi-geostrophic equations ridge-trough southeastern Pacific
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000620072200001
WOS类目	Meteorology & Atmospheric Sciences ; Oceanography
WOS研究方向	Meteorology & Atmospheric Sciences ; Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351008
作者单位	[Quispe-Gutierrez, Nelson; Aliaga-Nestares, Vannia; Rodriguez-Zimmermann, Diego; Bonshoms, Marti; Loayza, Raquel; Garcia, Teresa; Mesia, Jose; Duran, Ricardo; Olivares, Sara] Serv Nacl Meteorol & Hidrol SENAMHI, Jr Cahuide 785 Jesus Maria, Lima, Peru
推荐引用方式 GB/T 7714	Quispe-Gutierrez, Nelson,Aliaga-Nestares, Vannia,Rodriguez-Zimmermann, Diego,et al. Cutoff low over the southeastern Pacific Ocean: a case study[J],2021,71(1):17-29.
APA	Quispe-Gutierrez, Nelson.,Aliaga-Nestares, Vannia.,Rodriguez-Zimmermann, Diego.,Bonshoms, Marti.,Loayza, Raquel.,...&Olivares, Sara.(2021).Cutoff low over the southeastern Pacific Ocean: a case study.JOURNAL OF SOUTHERN HEMISPHERE EARTH SYSTEMS SCIENCE,71(1),17-29.
MLA	Quispe-Gutierrez, Nelson,et al."Cutoff low over the southeastern Pacific Ocean: a case study".JOURNAL OF SOUTHERN HEMISPHERE EARTH SYSTEMS SCIENCE 71.1(2021):17-29.