Magnetic Properties of the Ganzi Loess and Their Implications for Precipitation History in the Eastern Tibetan Plateau Since the Last Interglacial
Magnetic Properties of the Ganzi Loess and Their Implications for Precipitation History in the Eastern Tibetan Plateau Since the Last Interglacial
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甘孜黄土的磁性及其对青藏高原东部末次间冰期以来降水历史的意义
DOI：
10.1029/2021pa004322
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发表时间：
2022-01
影响因子：
3.5
通讯作者：
Li Pushuang
中科院分区：
文献类型：
--
作者：
Yang Shengli;Chen Zixuan;Chen Hui;Luo Yuanlong;Liu Li;Liu Xiaojing;Li Qiong;Zhou Jiantao;Li Pushuang
青藏高原东部黄土序列是重建印度夏季风环境历史的重要古环境档案。本文对甘孜黄土序列进行了详细的环境磁学分析，并通过多种磁学参数的分析重建了甘孜黄土序列的古降水历史。我们的结果如下：（a）甘孜黄土的磁性矿物主要为磁赤铁矿和磁铁矿，古土壤层中磁性矿物含量较高。成壤亚铁磁性颗粒是磁增强的主要原因，磁参数可以用来重建降水历史。(b)利用甘孜黄土的多个磁性参数重建的降水表明，青藏高原东部的降水变化剧烈，末次冰期旋回中最多雨的时期为大冰期和全新世。(c)ISM影响了青藏高原东部自LIG以来的降水变化。东TP的ISM和降水主要是由轨道变化，全球冰量，大气CO2浓度和内部气候强迫的冰川-间冰期时间尺度上的综合影响。
Loess sequences in the eastern Tibetan Plateau (TP) are valuable paleoenvironmental archives for reconstructing the environmental history related to the Indian summer monsoon (ISM). We conducted a detailed environmental magnetism analysis of the Ganzi loess sequence that developed since the Last Interglacial (LIG) and reconstructed the paleo-precipitation history by analyzing multiple magnetic parameters. Our results are as follows: (a) Magnetic minerals of the Ganzi loess are mainly maghemite and magnetite, with high concentrations of magnetic minerals in the paleosol layer. The pedogenic ferrimagnetic particles dominated the magnetic enhancement, and magnetic parameters can be used to reconstruct precipitation history. (b) Precipitation reconstructed by using the multiple magnetic parameters of the Ganzi loess shows that rainfall in the eastern TP has varied dramatically, and the wettest periods over the last glacial cycle were the LIG and the Holocene. (c) The ISM has influenced precipitation changes since the LIG in the eastern TP. The ISM and precipitation in the eastern TP were mainly driven by the combined effect of orbital changes, global ice volume, atmospheric CO2 concentration, and internal climate forcing on the glacial-interglacial timescale.
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影响因子：
64.8
作者：
L. Zhou;F. Oldfield;A. Wintle;S. Robinson;J. T. Wang
通讯作者：
L. Zhou;F. Oldfield;A. Wintle;S. Robinson;J. T. Wang
影响因子：
2.8
作者：
Dearing, JA;Bird, PM;Benjamin, SF
通讯作者：
Benjamin, SF
影响因子：
5.2
作者：
S. McGrath;S. Clemens;Yongsong Huang;Masanobu Yamamoto
通讯作者：
S. McGrath;S. Clemens;Yongsong Huang;Masanobu Yamamoto
DOI：
10.6038/cjg20151022
发表时间：
2015-10
期刊：
--
影响因子：
--
作者：
Zhao Shuang;Gao Fu-yuan;J. Jia;Liu Guan-hua;X. Dun-sheng;Jin He-ling
通讯作者：
Zhao Shuang;Gao Fu-yuan;J. Jia;Liu Guan-hua;X. Dun-sheng;Jin He-ling
青藏高原北部及其邻近地区风成沉积物磁性的空间和海拔变化：对划分气候边界的意义
影响因子：
12.1
作者：
Jinbo Zan;Xiaomin Fang;Jian Kang;Xiaojing Li;Maodu Yan
通讯作者：
Maodu Yan