程海^1,2,3,,
李瀚瑛¹,
张旭^4,5,
张海伟¹,
易亮⁶,
蔡演军¹,
胡永云⁷,
石正国²,
彭友兵¹,
赵景耀¹,
GayatriKathayat¹,
AshishSinha^1,8
1. 西安交通大学全球变化研究院, 陕西 西安 710054
2. 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 陕西 西安 710061
3. 中国地质科学院岩溶地质研究所岩溶动力学重点实验室, 广西 桂林 541004
4. 兰州大学资源环境学院, 西部环境教育部重点实验室, 甘肃 兰州 730000
5. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven 27568, Germany
6. 同济大学海洋地质国家重点实验室, 上海 200092
7. 北京大学物理学院大气与海洋科学系, 北京 100871
8. Department of Earth Sciences, California State University Dominguez Hills, California 90747, USA

基金项目: 国家自然科学基金项目(批准号：41888101)和国家自然科学基金重点项目(批准号：41731174)共同资助


详细信息

作者简介: 程海, 男, 61岁, 教授, 同位素年代学及古气候学, E-mail:cheng021@xjtu.edu.cn

中图分类号: P532

收稿日期:2020-05-29
修回日期:2020-08-31
刊出日期:2020-11-30

European-Asian-African continent: An early form of supercontinent and supermonsoon

Cheng Hai^1,2,3,,
Li Hanying¹,
Zhang Xu^4,5,
Zhang Haiwei¹,
Yi Liang⁶,
Cai Yanjun¹,
Hu Yongyun⁷,
Shi Zhengguo²,
Peng Youbing¹,
Zhao Jingyao¹,
Gayatri Kathayat¹,
Ashish Sinha^1,8
1. Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710054, Shaanxi
2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, Shaanxi
3. Key Laboratory of Karst Dynamics, Ministry of Natural Resources & Guangxi Zhuang Autonomous Region, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, Guangxi
4. Key Laboratory of Western Chin's Environmental Systems, Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, Gansu
5. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven 27568, Germany
6. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092
7. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871
8. Department of Earth Sciences, California State University Dominguez Hills, California 90747, USA


MSC: P532

--> Received Date: 29 May 2020
Revised Date: 31 August 2020
Publish Date: 30 November 2020


摘要
摘要:欧洲-亚洲-非洲大陆聚集在一起，占地球陆地面积的一半以上(约56%)，整体上可以近似看作是超级大陆的"雏形"；相应地，广泛分布的亚洲-非洲季风-干旱气候系统也可以近似为超级季风-干旱系统的"雏形"。对这一巨大气候体系的研究不仅本身有十分重要的理论和实际意义，同时也能够为研究潘基亚超级大陆-超级季风系统及其演化提供现代或第四纪的"相似型"。晚更新世-全新世地质记录和气候模拟结果表明亚洲-非洲夏季风气候变化主要响应北半球夏季太阳辐射变化；南北半球季风变化在岁差尺度上的相位关系近于相反；西风环流影响下的中亚干旱-半干旱区气候变化在岁差尺度上与亚洲季风也接近同相位变化；亚洲-非洲季风-干旱气候系统的这些变化在岁差尺度上领先于全球冰量的变化。总体上，似乎可以提出这样一种假说：受到地球轨道偏心率幅度调谐的太阳辐射在岁差尺度的周期波动可能是季风-干旱气候在轨道尺度上的主导"韵律"，包括潘基亚超级大陆季风气候在轨道尺度上的变化。第四纪欧洲-亚洲-非洲"超级大陆"及其季风-干旱系统本质上与潘基亚超级大陆的季风-干旱系统有着一定程度的相似性，因此研究前者是理解后者(所谓将今论古)的重要途径之一，对解译深时"碎片"化的地质记录有实际意义。
关键词: 亚洲-非洲季风/
潘基亚超级大陆-超级季风/
轨道时间尺度/
岁差相位

Abstract:The assembled European, Asian and African continents, accounting more than half(ca. 56%) of the Earth's landmass, and the corresponding Afro-Asian monsoon-dry-region system may be viewed as the early forms of super-continent and supermonsoon-arid-zone system. A comprehensive understanding of the vast Afro-Asian monsoon-dry region system is important from both theoretical and socioeconomic standpoints. Additionally, this understanding may also provide an important "analog" to probe the climate variations in the Pangean supermonsoon-arid-zone system across the low to middle latitude of the Pangean supercontinent and its change in the context of the continental breakup. Myriad empirical records and modeling results show that Afro-Asian monsoon variations broadly follow the summer insolation changes, manifesting significant precession cycles with a nearly anti-phase relation between Northern and Southern Hemisphere. Furthermore, the orbital-scale climate variations of the Afro-Asian monsoon and the accompanied large atmospheric circulation in the Asian Westerly arid-zone are approximately in-phase at the precession band. The Afro-Asian monsoon-arid Westerlies climate variations also lead the global ice volume change at the precession band. We suggest that the dominant orbital rhythm is eccentricity-modulated precession cycles in monsoon-arid-zone systems including the Pangean supermonsoon-arid-zone system. Regarding climatic dynamics, it appears that the Afro-Asian monsoon-arid-zone system has substantial similarity with the monsoon-arid-zone systems companied with the continent evolution at different stages during the Pangean supercontinent breakup. As such, it is critical to understand the Quaternary climate dynamics of the Afro-Asian monsoon-arid-zone system, which may provide key insight into the similar climate systems in deep time when the climate records are largely fragmented.
Key words:Afro-Asian monsoon/
Pangean supercontinent and supermonsoon/
orbital cycles/
precession phase



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