Abrupt hydroclimatic changes in southern China during the transition from the Little Ice Age to Current Warm Period
Abrupt hydroclimatic changes in southern China during the transition from the Little Ice Age to Current Warm Period
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小冰期向暖期过渡时期中国南方水文气候突变
DOI：
10.1016/j.palaeo.2022.110859
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发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Jianghu Lan
中科院分区：
文献类型：
--
作者：
Bin Liu;Enguo Sheng;Keke Yu;Jianghu Lan
印度夏季风（ISM）降水的变化在过去的千年是关键，了解ISM动力学和预测极端水文气候变化下的全球变暖情景。在这里，我们重建了ISM降水的历史，在过去的ca。800年，基于多个代理，包括沉积物粒度，有机质含量，生物硅含量，磁化率和主要元素数据（例如，Fe，Ti和Ca），从中国西南部马湖的岩心中获得。相对潮湿的气候条件在小冰期（LIA; 1400-1700 CE）盛行，而相对干燥的气候特征是当前温暖期（CWP; 1800 CE至今）。一个重要的干事件发生在过渡期间，从LIA到CWP。马湖过去一千年的水文气候记录与受ISM影响的其他地区（包括中国西南部、华南、南海和印度北方）的水文气候记录大致相似。我们认为，热带辐合带的南移可能是造成LIA向CWP过渡期间水文气候突变的原因。
The variations in Indian summer monsoon (ISM) precipitation during the last millennium are key to understanding ISM dynamics and predicting extreme hydroclimatic changes under global warming scenarios. Here, we reconstructed the history of ISM precipitation during the past ca. 800 yr based on multiple proxies, including sediment grain size, organic matter content, biogenic silica content, magnetic susceptibility, and major element data (e.g., Fe, Ti, and Ca), obtained for a core from Lake Mahu in southwestern China. Relatively humid climate conditions prevailed during the Little Ice Age (LIA; 1400–1700 CE), whereas a relatively dry climate has characterized the Current Warm Period (CWP; 1800 CE–present). A significant dry event occurred during the transition from the LIA to CWP. The hydroclimatic record for the last millennium from Lake Mahu is generally similar to those of other areas affected by the ISM, including southwestern China, South China, the South China Sea, and northern India. We propose that southward migration of the Intertropical Convergence Zone may have been responsible for the abrupt hydroclimatic change during the transition from the LIA to CWP.
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自末次盛冰期以来中国西南千年尺度的水文气候变化与热带印度洋有关
影响因子：
5.8
作者：
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影响因子：
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DOI：
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发表时间：
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影响因子：
1.5
作者：
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通讯作者：
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影响因子：
5.2
作者：
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影响因子：
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作者：
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