Universität zu Köln

Boehm, Christoph, Reyers, Mark ORCID: 0000-0001-7085-9345, Knarr, Leon ORCID: 0000-0002-3752-5682 and Crewell, Susanne ORCID: 0000-0003-1251-5805 (2021). The Role of Moisture Conveyor Belts for Precipitation in the Atacama Desert. Geophys. Res. Lett., 48 (24). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 1944-8007

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Abstract

In the hyperarid Atacama Desert in northern Chile, rare precipitation events can leave long-lasting geomorphological traces and have strong impacts on biota. While moisture conveyor belts (MCBs) and atmospheric rivers (ARs) have been associated with extreme precipitation in semiarid regions, their role for the Atacama Desert has not been previously investigated. This study reveals that about four MCBs per year make landfall in the Atacama Desert. According to simulated precipitation, 40-80% of the total precipitation between the coast and the Andean foothills is associated with MCBs. A case study reveals an elevated moisture transport decoupled from the maritime boundary layer, which is generalized by a composite analysis. Back trajectories reveal the Amazon Basin as the main source of moisture. MCB landfall times are derived from the AR catalog by Guan and Waliser (2015), . Implications of the results on paleoclimate reconstructions are discussed.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Boehm, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Reyers, Mark UNSPECIFIED orcid.org/0000-0001-7085-9345 UNSPECIFIED Knarr, Leon UNSPECIFIED orcid.org/0000-0002-3752-5682 UNSPECIFIED Crewell, Susanne UNSPECIFIED orcid.org/0000-0003-1251-5805 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-566621
DOI:	10.1029/2021GL094372
Journal or Publication Title:	Geophys. Res. Lett.
Volume:	48
Number:	24
Date:	2021
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	1944-8007
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CLIMATE; VARIABILITY; ARIDITY; IMPACT; EVENT; COAST Multiple languages Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/56662