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Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau

Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau
Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau
Eolian dust deposits in north China provide an excellent means of determining past variations in continental paleoclimate and atmospheric circulation. However, debate still exists on which deserts in east Asia are the dominant sources of Chinese loess and whether the dust provenance has shifted significantly at different time scales. Here we present new constraints on the provenance of fine-grained dust deposited on the central Chinese Loess Plateau (CLP) by combining electron spin resonance signal intensity and crystallinity index of fine-grained quartz contained in samples from two loess-paleosol sequences. Our results show that the fine-grained dust deposits on the CLP originate mainly from the Gobi desert in southern Mongolia and the sandy deserts in northern China (primarily the Badain Juran and Tengger deserts), rather than from the Taklimakan desert in western China, at least during the last climatic cycle. The dominant source of fine-grained dust varied significantly, from southern Mongolia during cold periods, to northern China during warm periods. The glacial-interglacial provenance fluctuations are strongly coupled with changes in the intensity of the near-surface northwesterly winter monsoon.
Chinese Loess Plateau, fine-grained quartz, dust provenance
0094-8276
L01804
Sun, Youbin
b97d1e17-ffc2-433c-b7b1-00dfe820e634
Tada, Ryuji
69f68945-1faf-49d5-a603-bed644c5dcc0
Chen, Jun
ae8e5c6b-5ab6-4682-8ff4-519d7a2768a2
Liu, Qingsong
fbaf8851-e943-4ece-91f5-c5f30306dff1
Toyoda, Shin
eab18e49-7ef0-4241-a70c-6ffaf3b81dc3
Tani, Atsushi
8ade8353-2bb5-425e-83b6-7622da600745
Ji, Junfeng
d5b1539a-cbbb-40c7-b5a9-dce5049f7f82
Isozaki, Yuko
63dfd8b7-f3f3-4105-bbd0-49f946ec8191
Sun, Youbin
b97d1e17-ffc2-433c-b7b1-00dfe820e634
Tada, Ryuji
69f68945-1faf-49d5-a603-bed644c5dcc0
Chen, Jun
ae8e5c6b-5ab6-4682-8ff4-519d7a2768a2
Liu, Qingsong
fbaf8851-e943-4ece-91f5-c5f30306dff1
Toyoda, Shin
eab18e49-7ef0-4241-a70c-6ffaf3b81dc3
Tani, Atsushi
8ade8353-2bb5-425e-83b6-7622da600745
Ji, Junfeng
d5b1539a-cbbb-40c7-b5a9-dce5049f7f82
Isozaki, Yuko
63dfd8b7-f3f3-4105-bbd0-49f946ec8191

Sun, Youbin, Tada, Ryuji, Chen, Jun, Liu, Qingsong, Toyoda, Shin, Tani, Atsushi, Ji, Junfeng and Isozaki, Yuko (1970) Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau. Geophysical Research Letters, 35, L01804. (doi:10.1029/2007GL031672).

Record type: Article

Abstract

Eolian dust deposits in north China provide an excellent means of determining past variations in continental paleoclimate and atmospheric circulation. However, debate still exists on which deserts in east Asia are the dominant sources of Chinese loess and whether the dust provenance has shifted significantly at different time scales. Here we present new constraints on the provenance of fine-grained dust deposited on the central Chinese Loess Plateau (CLP) by combining electron spin resonance signal intensity and crystallinity index of fine-grained quartz contained in samples from two loess-paleosol sequences. Our results show that the fine-grained dust deposits on the CLP originate mainly from the Gobi desert in southern Mongolia and the sandy deserts in northern China (primarily the Badain Juran and Tengger deserts), rather than from the Taklimakan desert in western China, at least during the last climatic cycle. The dominant source of fine-grained dust varied significantly, from southern Mongolia during cold periods, to northern China during warm periods. The glacial-interglacial provenance fluctuations are strongly coupled with changes in the intensity of the near-surface northwesterly winter monsoon.

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More information

Published date: 1 January 1970
Keywords: Chinese Loess Plateau, fine-grained quartz, dust provenance
Organisations: Ocean and Earth Science, National Oceanography Centre,Southampton

Identifiers

Local EPrints ID: 64080
URI: http://eprints.soton.ac.uk/id/eprint/64080
ISSN: 0094-8276
PURE UUID: 5f0e2871-9390-46fd-abf8-046930158fc6

Catalogue record

Date deposited: 27 Nov 2008
Last modified: 13 Mar 2019 20:22

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