干旱区生态环境知识资源中心(Arid): Filling the observational gap in the Atacama Desert with a new network of climate stations

Arid

DOI	10.1016/j.gloplacha.2019.103034
	Filling the observational gap in the Atacama Desert with a new network of climate stations
	Schween, Jan H.1; Hoffmeister, Dirk 2; Loehnert, Ulrich 1
通讯作者	Schween, Jan H.
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2020
卷号	184
英文摘要	The Atacama Desert in northern Chile is the driest place on Earth. In this region, climate models are subject to large biases, especially precipitation is significantly overestimated. Meteorological observations in the region are sparse and limited to inhabited places at the coast or the foothills of the Andes. To fill this gap, a new network of 15 automatic weather stations has been established beginning April 2017. These stations do not only record standard meteorological parameters such as temperature, humidity and wind, but also soil temperatures and humidity, additionally a wetness sensor gives information about the occurrence of fog. Data from the first year(s) of this network show a very regular wind pattern with easterly winds during night and morning and westerly winds from noon to evening. This wind transports moisture from the Pacific Ocean into the desert which forms fog during the night which may account for a moisture supply on the order of the rare precipitation events in the region. A few precipitation events have been observed during the first years. The recorded data allows to distinguish between different sources: convective precipitation above the Altiplano, which in some cases extended to the western slope of the Andes, and troughs extending from mid latitudes to the region, directing moist air from the pacific into the region. Both of these mechanisms brought only some tenths of mm precipitation. In one case the accidental combination of flow over the Andes and a weak cut-off low above the Pacific led to moisture convergence off the coast of northern Chile and initiated a convective system moving south-east ward which brought for the region extreme precipitation of 3-10 mm.
类型	Article
语种	英语
国家	Germany
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000508491500031
WOS关键词	LOW-LEVEL JET ; NORTHERN CHILE ; HYPERARID CORE ; SOUTH-AMERICA ; WEST-COAST ; FOG ; PRECIPITATION ; VARIABILITY ; DEPOSITION ; DYNAMICS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312220
作者单位	1.Univ Cologne, Inst Geophys & Meteorol, Cologne, Germany; 2.Univ Cologne, Inst Geog, D-50923 Cologne, Germany
推荐引用方式 GB/T 7714	Schween, Jan H.,Hoffmeister, Dirk,Loehnert, Ulrich. Filling the observational gap in the Atacama Desert with a new network of climate stations[J],2020,184.
APA	Schween, Jan H.,Hoffmeister, Dirk,&Loehnert, Ulrich.(2020).Filling the observational gap in the Atacama Desert with a new network of climate stations.GLOBAL AND PLANETARY CHANGE,184.
MLA	Schween, Jan H.,et al."Filling the observational gap in the Atacama Desert with a new network of climate stations".GLOBAL AND PLANETARY CHANGE 184(2020).