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Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength

J. A. Mason, H. Lu, Y. Zhou, X. Miao, J. B. Swinehart, Z. Liu, R. J. Goble and S. Yi
Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength
Geology (Boulder) (October 2009) 37 (10): 947-950

Abstract

Wind-blown sands were mobile at many sites along the desert margin in northern China during the early Holocene (11.5-8 ka ago), based on extensive new numerical dating. This mobility implies low effective moisture at the desert margin, in contrast to growing evidence for greater than modern monsoon precipitation at the same time in central and southern China. Dry conditions in the early Holocene at the desert margin can be explained through a dynamic link between enhanced diabatic heating in the core region of the strengthened monsoon and increased subsidence in drylands to the north, combined with high evapotranspiration rates due to high summer temperatures. After 8 ka ago, as the monsoon weakened and lower temperatures reduced evapotranspiration, eolian sands were stabilized by vegetation. Aridity and dune mobility at the desert margin and a strengthened monsoon can both be explained as responses to high summer insolation in the early Holocene.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 37
Serial Issue: 10
Title: Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength
Affiliation: University of Wisconsin-Madison, Department of Geography, Madison, WI, United States
Pages: 947-950
Published: 200910
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 35
Accession Number: 2009-098006
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2009233
Illustration Description: illus. incl. sects., sketch map
N35°00'00" - N42°00'00", E100°00'00" - E121°00'00"
Secondary Affiliation: Nanjing University, CHN, ChinaShaanxi Normal University, CHN, ChinaIllinois State Geological Survey, USA, United StatesUniversity of Nebraska-Lincoln, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200952
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