Asian monsoons and aridification response to Paleogene sea retreat and Neogene westerly shielding indicated by seasonality in Paratethys oysters

被引：78

作者：

Bougeois, Laurie ^{[1
]}

Dupont-Nivet, Guillaume ^{[2
,3
,4
]}

de Rafelis, Marc ^{[5
]}

Tindall, Julia C. ^{[6
]}

Proust, Jean-Noel ^{[2
]}

Reichart, Gert-Jan ^{[7
]}

de Nooijer, Lennart J. ^{[7
]}

Guo, Zhaojie ^{[4
]}

Ormukov, Cholponbelk ^{[8
]}

机构：

[1] Minist Educ Natl, Acad Montpellier, Montpellier, France

[2] Univ Rennes 1, Geosci Rennes, UMR CNRS 6118, Rennes, France

[3] Potsdam Univ, Dept Earth & Environm Sci, Potsdam, Germany

[4] Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China

[5] Univ Toulouse, IRD, CNRS, GET,Observ Midi Pyrenees, Toulouse, France

[6] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England

[7] Royal Netherlands Inst Sea Res, Dept Marine Geol, Texel, Netherlands

[8] CAIAG, T Frunze Rd 73-2, Bishkek 720027, Kyrgyzstan

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2018年 / 485卷

基金：

欧洲研究理事会;

关键词：

Eocene monsoon; aridification; Paratethys sea; Central Asia; seasonality; bivalves; NORTHERN MARGIN; HIGH-RESOLUTION; CLIMATE; SHELLS; BASIN; CONSTRAINTS; TEMPERATURE; TRANSITION; EVOLUTION; UPLIFT;

D O I：

10.1016/j.epsl.2017.12.036

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

070403 [天体物理学]; 070902 [地球化学];

摘要：

Asian climate patterns, characterised by highly seasonal monsoons and continentality, are thought to originate in the Eocene epoch (56 to 34 million years ago - Ma) in response to global climate, Tibetan Plateau uplift and the disappearance of the giant Proto-Paratethys sea formerly extending over Eurasia. The influence of this sea on Asian climate has hitherto not been constrained by proxy records despite being recognised as a major driver by climate models. We report here strongly seasonal records preserved in annual lamina of Eocene oysters from the Proto-Paratethys with sedimentological and numerical data showing that monsoons were not dampened by the sea and that aridification was modulated by westerly moisture sourced from the sea. Hot and arid summers despite the presence of the sea suggest a strong anticyclonic zone at Central Asian latitudes and an orographic effect from the emerging Tibetan Plateau. Westerly moisture precipitating during cold and wetter winters appear to have decreased in two steps. First in response to the late Eocene (34-37 Ma) sea retreat; second by the orogeny of the Tian Shan and Pamir ranges shielding the westerlies after 25 Ma. Paleogene sea retreat and Neogene westerly shielding thus provide two successive mechanisms forcing coeval Asian desertification and biotic crises. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：99 / 110

页数：12

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