A Holocene dust record in arid central Asia inferred from Lake Barkol, northwest China

被引：0
作者：
Yanbin Lu
Chengbang An
Jiawu Zhang
Zongli Wang
Shichen Tao
Jiaju Zhao
机构：
[1] MOE,Key Laboratory of Western China’s Environmental Systems
[2] Lanzhou University,undefined
来源：
Environmental Earth Sciences | 2012年 / 65卷
关键词：
Holocene; Dust; Central Asia; Lake Barkol;
D O I：
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中图分类号：
学科分类号：
摘要：
Grain-size distributions and detrital minerals were investigated for modern dust and for lacustrine sediment in Lake Barkol region, northwest China. Characteristics of the modern dust and lacustrine sediments, principle component analysis, and changes of quartz contents all suggest grain size 45–138 μm in the core sediment is the dust sensitive component. It indicates that high dust flux climate occurred at mid-Holocene (5.5–4.5 cal ka BP), corresponding to the high dust flux record in northwest Pacific and the drought interval of deserts in northwest China during the mid-Holocene. The strong dust activity is in contradiction with the climatic optimum recorded by the lacustrine evidence in Xinjiang. Different responses of the dust source region and watershed to the regional climate may have led to the inconsistency between dust and climate records during the mid-Holocene in arid central Asia.
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页码：213 / 220
页数：7
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