Significant influence of Northern Hemisphere high latitude climate on appeared precession rhythm of East Asian summer monsoon after Mid-Brunhes Transition interglacials recorded in the Chinese loess
Significant influence of Northern Hemisphere high latitude climate on appeared precession rhythm of East Asian summer monsoon after Mid-Brunhes Transition interglacials recorded in the Chinese loess
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中国黄土记录的北半球高纬度气候对中布鲁尼斯转换间冰期后东亚夏季风岁差节律的显着影响
DOI：
10.1016/j.catena.2020.105002
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发表时间：
2021-02
期刊：
影响因子：
6.2
通讯作者：
Ji Junfeng
中科院分区：
文献类型：
--
作者：
Meng Xianqiang;Liu Lianwen;Miao Xiaodong;Zhao Wancang;Zhang Enlou;Ji Junfeng
过去东亚夏季风（EASM）降水的周期性和强迫机制是预测未来降水变化的自然背景，但一直存在争议。在这里，我们提出了一个高分辨率的东亚夏季风降水记录重建的黄土红色在中国北方在过去的720 kyr。间冰期的平均降水量为420毫米/年，高于现在（~280毫米/年）。通过我们的EASM记录和以前发表的数据进行梳理，在轨道时间尺度上显示出100 kyr的主导周期，从而支持高纬度气候强迫的假设。更重要的是，我们发现，岁差周期出现后，中期Brunhes过渡（MBT，~430 ka）在EASM记录，它遵循全球冰量之前的MBT在间冰期内部。我们认为，在后MBT间冰期，北极常年海冰的突然出现导致了北方半球西风急流的南移，从而减少了中国北方的EASM降水。这表明东亚夏季风的岁差节律可能是北极常年海冰或北方半球冰盖变化的结果。在温暖的海洋同位素阶段（MIS）5e和11 e，最强的东亚夏季风降水可能与加强从温暖的热带海洋的水汽输送。因此，间冰期内中纬度东亚夏季风降水强度的变化是北半球高纬冰量和低纬气候变化的综合作用。
The periodicity and forcing mechanism of the past East Asian summer monsoon (EASM) precipitation are the natural background for predicting future precipitation changes, but they are controversial and intensely debated. Here, we present a high-resolution EASM precipitation record reconstructed from the loess redness in North China over the past 720 kyr. The average precipitation for interglacials is 420 mm/yr, higher than present (~280 mm/yr). Combing through our EASM records and previously published data exhibits a dominated periodicity of 100 kyr on the orbital timescale, and thus supports the hypothesis of high-latitude climate forcing. More importantly, we found the precession cycle appears only after the Mid-Brunhes Transition (MBT, ~430 ka) in the EASM records and it follows the global ice volume prior to the MBT in the interglacials interiors. We argue that during the post-MBT interglacials, abruptly appearing Arctic perennial sea ice resulted southward shift of the Northern Hemisphere Westerlies jet, thereby decreasing the EASM precipitation in North China. This suggests that the precession rhythm in the EASM possibly is a result of Arctic perennial sea ice or Northern Hemisphere ice sheets changes. In the warm Marine Isotope Stages (MIS) 5e and 11e, the strongest EASM precipitation may be related to the strengthening of the moisture transport from the warming tropical ocean. Therefore, the variation of the mid-latitude EASM precipitation intensity during the interglacial interiors is the integrated effect between the North Hemisphere high latitude ice volume and low latitude climate changes.
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影响因子：
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作者：
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影响因子：
4.6
作者：
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通讯作者：
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DOI：
10.1111/j.1755-6724.2000.tb00462.x
发表时间：
2000-06
期刊：
Acta Geologica Sinica ‐ English Edition
影响因子：
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作者：
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影响因子：
64.8
作者：
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通讯作者：
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