Grain size of Lake Qinghai sediments: Implications for riverine input and Holocene monsoon variability

Grain-size compositions of lake sediments can provide direct information on changes in transporting mechanism and sedimentary environment. Various grain-size parameters have been employed to reconstruct hydrological conditions within the lake and dust influx from outside the lake. Here we present th...

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Bibliographic Details
Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Liu, Xingxing, Vandenberghe, Jef, An, Zhisheng, Li, Ying, Jin, Zhangdong, Dong, Jibao, Sun, Youbin
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
Lake Qinghai
Grain Size
Holocene
Asian Summer Monsoon
Solar Activities
Science & Technology
Physical Sciences
Life Sciences & Biomedicine
NE TIBETAN PLATEAU
NORTH-ATLANTIC CLIMATE
OXYGEN-ISOTOPE RECORD
HIGH-RESOLUTION
CENTRAL CHINA
ATMOSPHERIC CIRCULATION
LATEST PLEISTOCENE
QUATERNARY CLIMATE
CARBON ISOTOPES
Physical Geography
Geology
Paleontology
Geography
Physical
Geosciences
Multidisciplinary
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/5784
https://doi.org/10.1016/j.palaeo.2016.02.005
Description
Summary:Grain-size compositions of lake sediments can provide direct information on changes in transporting mechanism and sedimentary environment. Various grain-size parameters have been employed to reconstruct hydrological conditions within the lake and dust influx from outside the lake. Here we present the grain-size results of a 5-m core retrieved from Lake Qinghai, northeastern Tibetan Plateau in order to address the links between Holocene depositional process and climatic change. Our results indicate that two parameters (skewness and grain-size ratio of 8-50/2-8 mu m) are sensitive to hydrodynamic changes in Lake Qinghai, which are further linked to the strength of the Asian summer monsoon. Variations of these two parameters reveal that summer monsoon intensity weakened gradually from early to late Holocene, superimposed by persistent centennial variability with dominant periods at 0.35, 0.23 and 0.12 kyr. Comparison of grain-size variations with solar activities and North Atlantic cooling events reveals that solar forcing likely plays an important role in driving centennial monsoon variability. (C) 2016 Elsevier B.V. All rights reserved.

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