Western Mongolian Plateau exhibits increasing Holocene temperature

IF 4 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL
Chong Huang , Xiaozhong Huang , Jinbao Li , Ling Wang , Lan Jiang , Lixiong Xiang , Jun Zhang , Yu Hu , Xiaoyan Mu , Min Zheng , Xiuxiu Ren , Tao Wang , Jiawu Zhang , Guoliang Lei , Otgonbayar Demberel , Xiaodong Liu , Natalia Rudaya , Antje Schwalb , Yanwu Duan , Jule Xiao , Fahu Chen
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Abstract

The scarcity of Holocene winter temperature records from the core area of the Mongolian-Siberian High (MSH) hampers our understanding of the long-term evolution of the MSH and its modulation of the East Asian Winter Monsoon (EAWM). Here we use the body size of Pediastrum, a new and sensitive temperature proxy, from the sediments of Tolbo Lake in the western Mongolian Plateau, to reconstruct changes in winter temperature in the core area of the MSH during the Holocene. A large-scale investigation of modern Pediastrum body size across East Asia indicates that it is an accurate proxy indicator for mean winter temperature. The Holocene winter temperature based on Pediastrum body size from Tolbo Lake shows a general warming trend with the maximum at ∼2.6 ka. The current warming has attained the magnitude of the previous Holocene maximum, despite the underlying forcing being different. The mid-late Holocene winter warming in inland Eurasia may have weakened the MSH and reduced the intensity of the EAWM.

西蒙古高原显示全新世温度不断升高
蒙古-西伯利亚高原(MSH)核心区全新世冬季温度记录的缺乏,阻碍了我们对蒙古-西伯利亚高原的长期演变及其对东亚冬季季候风(EAWM)的调节作用的理解。在此,我们利用蒙古高原西部托尔博湖沉积物中的一种新的敏感温度代用指标 Pediastrum 的体型来重建全新世期间蒙古-西伯利亚高原核心区冬季温度的变化。对东亚地区现代Pediastrum体型的大规模调查表明,Pediastrum是冬季平均温度的准确替代指标。根据托尔布湖的 Pediastrum 体型计算的全新世冬季温度显示出总体变暖趋势,最大值出现在 ∼2.6 ka。目前的变暖幅度已经达到了上一个全新世的最大值,尽管潜在的作用力不同。全新世中晚期欧亚内陆冬季变暖可能削弱了MSH,降低了EAWM的强度。
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来源期刊
Global and Planetary Change
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.
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