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IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change Pub Date : 2024-12-09 DOI:10.1016/j.gloplacha.2024.104676

Yi Zhong, Yuxing Liu, Xiaojing Du, Xiaoxu Shi, Xing Xu, Zhengyao Lu, Stefanie Kaboth-Bahr, Mark J. Dekkers, Juan C. Larrasoaña, Keiji Horikawa, Chijun Sun, Liang Ning, André Bahr, Yanan Zhang, Debo Zhao, Jiabo Liu, Wenyue Xia, Jingyu Zhang, Sheng Yang, Hai Li, Xiaoyue Liang, Chenxi Hong, Zhengyang Dai, Yuanjie Li, Qingsong Liu

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引用次数: 0

摘要

由于缺乏可靠的华南降水记录以及模式模拟的不一致，东亚地区千年尺度的水文气候变异一直存在争议。在此，我们根据南海北部海相沉积岩芯的环境磁性和粘土矿物代用参数，重建了中国南部和台湾 40 年的降水记录。这两种代用参数都表明，在北大西洋降温期间，中国南部-台湾地区的东亚夏季季候风（EASM）降水量减少。结合其他东亚夏季季候风降水记录和模拟结果，我们得出结论：东南亚的降水空间模式与太平洋沃克环流的强度密切相关。这一解释得到了模型模拟的支持，模型模拟强调了沃克环流在将北大西洋气候变率传递到东亚水文气候中的作用。我们的发现有助于解决东南亚降水代用指标与模式模拟之间的差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Pacific Walker Circulation modulated millennial-scale East Asian summer monsoon rainfall variability over the past 40 kyr

The millennial-scale hydroclimate variability in East Asia has been debated for a long time due to the lack of reliable precipitation records from southern China and inconsistent model simulations. Here, we reconstruct a 40-kyr rainfall record for southern China and Taiwan based on enviro-magnetic and clay mineral proxy parameters from a northern South China Sea marine sediment core. Both proxies suggest reduced East Asian Summer Monsoon (EASM) precipitation in the southern China-Taiwan region during North Atlantic cooling episodes. After integration with other EASM precipitation records and modeling results, we conclude that the spatial precipitation pattern across Southeast Asia is closely related to the strength of the Pacific Walker Circulation. This interpretation is supported by a model simulation that emphasizes the role of the Walker Circulation in transferring North Atlantic climate variability to the East Asian hydroclimate. Our findings contribute to resolving the disparities between precipitation proxies and model simulations in Southeast Asia.

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来源期刊

Global and Planetary Change 地学天文-地球科学综合

CiteScore

7.40

自引率

10.30%

发文量

226

审稿时长

63 days

期刊介绍： The objective of the journal Global and Planetary Change is to provide a multi-disciplinary overview of the processes taking place in the Earth System and involved in planetary change over time. The journal focuses on records of the past and current state of the earth system, and future scenarios , and their link to global environmental change. Regional or process-oriented studies are welcome if they discuss global implications. Topics include, but are not limited to, changes in the dynamics and composition of the atmosphere, oceans and cryosphere, as well as climate change, sea level variation, observations/modelling of Earth processes from deep to (near-)surface and their coupling, global ecology, biogeography and the resilience/thresholds in ecosystems. Key criteria for the consideration of manuscripts are (a) the relevance for the global scientific community and/or (b) the wider implications for global scale problems, preferably combined with (c) having a significance beyond a single discipline. A clear focus on key processes associated with planetary scale change is strongly encouraged. Manuscripts can be submitted as either research contributions or as a review article. Every effort should be made towards the presentation of research outcomes in an understandable way for a broad readership.