气候变化领域集成服务门户(CCPortal): Synoptic attributions of extreme precipitation in the Atacama Desert (Chile)

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DOI	10.1007/s00382-020-05455-4
	Synoptic attributions of extreme precipitation in the Atacama Desert (Chile)
	Meseguer-Ruiz O.; Ponce-Philimon P.I.; Baltazar A.; Guijarro J.A.; Serrano-Notivoli R.; Olcina Cantos J.; Martin-Vide J.; Sarricolea P.
发表日期	2020
ISSN	0930-7575
起始页码	3431
结束页码	3444
卷号	55
英文摘要	Northern Chile is a region characterised by an extremely dry climate; however, there is a brief rainy season from December to March (austral summer), mainly above 3000 m a.s.l. It is interesting to consider where the humid air masses that generate such rain come from. For this purpose, daily precipitation data from 161 meteorological stations located in this area (18° S–19° S) were considered, and four clusters formed by k-means clustering. For each cluster, days of extreme precipitation (above 90th percentile) were selected to obtain flow strength (F), direction (D), and vorticity (Z) for each event according to the Jenkinson and Collison (JC) method. The back trajectory, for the previous 72 h, of air masses affecting the centroid of each cluster was determined by means of the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model. The analyses were carried out at sea level (1013 hPa) and in the middle (500 hPa) and upper (250 hPa) troposphere. Surface circulation was not a determining factor in the occurrence of extreme events, but it did influence circulation at 500 and 250 hPa. For stations located in the northern Altiplano, moisture advection from the Amazon basin is evident due to the configuration of the Bolivian high—an upper level anticyclone that develops over the Bolivian Altiplano during austral summer. For stations located in the southern part of the study area, the main source of moisture is the Pacific Ocean, and the weather is related to the arrival of frontal systems and to the configuration of cut-off low pressure systems in the mid-troposphere. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Back trajectory; Extreme precipitation; HYSPLIT model; Jenkinson and Collison method; Northern Chile
语种	英语
scopus关键词	air mass; anticyclone; atmospheric moisture; extreme event; precipitation intensity; synoptic meteorology; trajectory; Atacama Desert; Chile
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145250
作者单位	Departamento de Ciencias Históricas y Geográficas, Universidad de Tarapacá, 2222, 18 de Septiembre, Arica, Chile; State Meteorological Agency (AEMET), Balearic Islands Office, Palma, Spain; Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas (EEAD-CSIC), Avda. Montañana 1005, Zaragoza, Spain; Instituto Interuniversitario de Geografía, Universidad de Alicante, Edificio de Institutos Universitarios, Apartado de Correos 99, Alicante, 03080, Spain; Departamento de Geografía, Universidad de Barcelona, Montalegre 6-8, Barcelona, 08001, Spain; Departamento de Geografía, Universidad de Chile, Portugal 84, Torre Chica, Santiago, Chile
推荐引用方式 GB/T 7714	Meseguer-Ruiz O.,Ponce-Philimon P.I.,Baltazar A.,et al. Synoptic attributions of extreme precipitation in the Atacama Desert (Chile)[J],2020,55.
APA	Meseguer-Ruiz O..,Ponce-Philimon P.I..,Baltazar A..,Guijarro J.A..,Serrano-Notivoli R..,...&Sarricolea P..(2020).Synoptic attributions of extreme precipitation in the Atacama Desert (Chile).Climate Dynamics,55.
MLA	Meseguer-Ruiz O.,et al."Synoptic attributions of extreme precipitation in the Atacama Desert (Chile)".Climate Dynamics 55(2020).