Holocene lake level, vegetation, and climate at the East Asian summer monsoon margin: A record from the Lake Wulanhushao basin, southern Inner Mongolia
Holocene lake level, vegetation, and climate at the East Asian summer monsoon margin: A record from the Lake Wulanhushao basin, southern Inner Mongolia
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东亚夏季风边缘全新世湖泊水位、植被与气候——来自内蒙古南部乌兰湖哨盆地的记录
DOI：
10.1016/j.palaeo.2020.110051
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Guoqiang Li
中科院分区：
文献类型：
--
作者：
Chunzhu Chen;Shuxian;Wenwei Zhao;Ming Jin;Zhong Wang;Huan Li;Haiyun Ren;Guoqiang Li
了解全新世气候变化对中国干旱北方的影响将为更好地预测该地区未来的水资源供应提供重要的见解。在这项研究中，我们提供了来自内蒙古南部乌兰湖哨盆地的湖泊-风成沉积剖面和湖泊沉积岩心的古环境数据。露头部分的光激发光测年和海拔测量提供了过去 10.1 公里的湖泊水位变化估计。对于沉积物核心，对花粉、粒度、烧失量、元素和色度进行了多代理分析。花粉结果表明，水分有从 10.6 卡凯尔 B.P. 增加到 9.1 卡凯尔 B.P. 的趋势，为山上树木的逐渐生长提供了温和的条件。最高水分利用率达到 9.1 至 5.6 卡凯尔 B.P。导致最大的树栖范围。此后，该地区出现干旱化，表现为树木减少和沙漠成分增加。与花粉结果相比，来自湖泊沉积物核心和露头部分的非花粉替代物表明气候模式略有不同。也就是说，湖泊流域全新世气候最适宜的开始，由高湖水位、生物产量增加和化学风化增强所表明，比远端山脉的树木扩张早了约 1.5 kyr。虽然从东亚夏季风边缘的湖泊花粉记录推断，气候模式或多或少是一致的，但流域对区域气候变化的特定反应可能解释了花粉和非花粉代理之间令人困惑的差异。我们的研究强调了在调查当地和区域对全新世气候变化的反应时从不同角度进行多代理分析的重要性。
Understanding the impact of Holocene climate variations in arid northern China will provide important insights into a better prediction of future water availability in this region. In this study, we present paleoenvironment data from the lacustrine-aeolian deposit sections and a lake sediment core from the Lake Wulanhushao basin, southern Inner Mongolia. Optically Stimulated Luminescence dating and elevation measurements on the outcrop sections provide an estimation of lake-level changes for the past 10.1 kyr. For the sediment core, multi-proxy analyses of pollen, grain size, loss-on-ignition, element, and chroma were undertaken. The pollen result indicates a tendency of moisture increase from 10.6 to 9.1 cal kyr B.P., providing moderate conditions for the gradual expansion of trees in the mountains. The highest moisture availability was reached from 9.1 to 5.6 cal kyr B.P. leading to the maximal arboreal extent. After then, aridification in the region was evidenced by the declined trees and the increase of desert components. Comparing with the pollen result, non-pollen proxies from the lake sediment core and the outcrop sections indicate a slightly different climate pattern. That is, the initiation of Holocene climate optimum in the lake catchment, suggested by a high lake level, increased biological production, and an enhanced chemical weathering occurred about 1.5 kyr earlier than the arboreal expansion in the distal mountains. While the climate patterns were more or less consistent as inferred from the lacustrine pollen records at the East Asian Summer Monsoon margin, catchment-specific responses to regional climate variations might explain this perplexing discrepancy between pollen and non-pollen proxies. Our study emphasizes the importance of multi-proxy analyses from various perspectives when investigating the local and regional responses to Holocene climate variations.
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柴达木盆地胡尔勒格湖全新世植被与气候历史
影响因子：
1.9
作者：
Ito, Emi;Zhao, Yan;Chen, Fahu;Zhao, Cheng;Yu, Zicheng
通讯作者：
Yu, Zicheng
DOI：
10.2307/2401710
发表时间：
1965-05
期刊：
--
影响因子：
--
作者：
K. Faegri;J. Iversen
通讯作者：
K. Faegri;J. Iversen
影响因子：
2
作者：
W. Dean
通讯作者：
W. Dean
DOI：
10.1016/s1571-0866(07)80027-3
发表时间：
2007-01-01
期刊：
CLIMATE OF PAST INTERGLACIALS
影响因子：
--
作者：
Berger, A.;Loutre, M. F.;Lorenz, S. J.
通讯作者：
Lorenz, S. J.
影响因子：
16.6
作者：
Stevens T;Buylaert JP;Thiel C;Újvári G;Yi S;Murray AS;Frechen M;Lu H
通讯作者：
Lu H