干旱区生态环境知识资源中心(Arid): Water vapor variability in the Atacama Desert during the 20th century

Arid

DOI	10.1016/j.gloplacha.2020.103192
	Water vapor variability in the Atacama Desert during the 20th century
	Boehm, Christoph; Reyers, Mark; Schween, Jan Herbert; Crewell, Susanne
通讯作者	Bohm, C
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2020
卷号	190
英文摘要	This study focuses on integrated water vapor (IWV) which is the main source for precipitation, fog and dew formation in the Atacama Desert in northern Chile. In order to study its long-term variability, a consistent meteorological record is needed. Here, we utilize the European Centre for Medium-Range Weather Forecasts' reanalysis ERA-20C which provides IWV among other atmospheric variables over the course of the entire 20th century (1900-2010). In this two fold study, we first present a validation of ERA-20C IWV for the Atacama and the bordering southeast Pacific region. Comparisons to satellite observations, i.e. the Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite data record and the Moderate Resolution Imaging Spectroradiometer measurements, for overlapping time periods prove the suitability of ERA-20C to study IWV variability. Assessment of the observation feedback in ERA-20C reveals a higher uncertainty for the beginning of the 20th century when fewer observations are assimilated. Nevertheless, departures of the assimilated observations do not show a systematic bias in space or time supporting suitability of ERA-20C for long-term investigations. In the second part of the study, we describe the IWV variability over the course of the 20th century. Deviations from the long-term mean greater than 30% are found on an inter-annual time scale over the continental Atacama. Furthermore, we investigate potential drivers of the IWV variability such as the Pacific Decadal Oscillation (PDO) and the El Nino Southern Oscillation (ENSO) phenomenon. The relationship between the local IWV and these large scale indices depends on region and season. For instance, during austral summer, La Nina conditions yield overall greater IWV variability in the Atacama allowing both drier and even more pronounced wetter extremes than El Nino conditions.
英文关键词	Water cycle Integrated water vapor ERA-20C Atacama Hydrological cycle Moisture transport
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000536927700007
WOS关键词	SOUTHEAST PACIFIC ; VOCALS-REX ; CLIMATE ; PRECIPITATION ; REANALYSIS ; OSCILLATION ; CIRCULATION ; MECHANISMS ; ALTIPLANO ; ANOMALIES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324589
作者单位	[Boehm, Christoph; Reyers, Mark; Schween, Jan Herbert; Crewell, Susanne] Univ Cologne, Inst Geophys & Meteorol, Cologne, Germany
推荐引用方式 GB/T 7714	Boehm, Christoph,Reyers, Mark,Schween, Jan Herbert,et al. Water vapor variability in the Atacama Desert during the 20th century[J],2020,190.
APA	Boehm, Christoph,Reyers, Mark,Schween, Jan Herbert,&Crewell, Susanne.(2020).Water vapor variability in the Atacama Desert during the 20th century.GLOBAL AND PLANETARY CHANGE,190.
MLA	Boehm, Christoph,et al."Water vapor variability in the Atacama Desert during the 20th century".GLOBAL AND PLANETARY CHANGE 190(2020).