globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD024835
论文题名:
Extreme temperature and precipitation events in March 2015 in central and northern Chile
作者: Barrett B.S.; Campos D.A.; Veloso J.V.; Rondanelli R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:9
起始页码: 4563
结束页码: 4580
语种: 英语
英文关键词: Atacama ; Chile ; cutoff low ; extreme precipitation ; flow blocking ; heat wave
Scopus关键词: air temperature ; extreme event ; hydrometeorology ; precipitable water ; precipitation (climatology) ; streamflow ; surface temperature ; temperature anomaly ; temperature effect ; troposphere ; water content ; Atacama ; Chile ; Metropolitana ; Peru
英文摘要: From 18 to 27 March 2015, northern, central, and southern Chile experienced a series of extreme hydrometeorological events. First, the highest surface air temperature ever recorded in Santiago (with reliable records dating to 1877), 36.8°C at Quinta Normal, was measured at 15:47 local time on 20 March 2015. Immediately following this high heat event, an extreme precipitation event, with damaging streamflows from precipitation totals greater than 45 mm, occurred in the semiarid and hyperarid Atacama regions. Finally, concurrent with the heavy precipitation event, extremely warm temperatures were recorded throughout southern Chile. These events were examined from a synoptic perspective with the goal of identifying forcing mechanisms and potential interaction between each analysis which provides operational context by which to identify and predict similar events in the future. Primary findings were as follows: (1) record warm temperatures in central Chile resulted from anomalous lower troposphere ridging and easterly downslope flow, both of which developed in response to an anomalous midtroposphere ridge-Trough pattern; (2) a cutoff low with anomalous heights near one standard deviation below normal slowly moved east and was steered ashore near 25°S by circulation around a very strong ridge (anomalies more than 3 standard deviations above normal) centered near 60°S; (3) anomalously high precipitable water content (20 mm above climatological norms) over the Peruvian Bight region was advected southward and eastward ahead of the cutoff low by low-level northwesterly flow, greatly enhancing observed precipitation over northern Chile. © Published 2016. This article is a U.S. Government work and is in the public domain in the USA.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62865
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Oceanography Department, U.S. Naval Academy, Annapolis, MD, United States; Department of Geophysics, University of Chile, Santiago, Chile; Centro Nacional Del Medio Ambiente, Universidad de Chile, Santiago, Chile; Aplicaciones Satelitales, Dirección Meteorológica de Chile, Santiago, Chile; Meteorología Agrícola, Dirección Meteorológica de Chile, Santiago, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile

Recommended Citation:
Barrett B.S.,Campos D.A.,Veloso J.V.,et al. Extreme temperature and precipitation events in March 2015 in central and northern Chile[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)
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