The role of the westerlies and orography in Asian hydroclimate since the late Oligocene | Zendy

Xin Wang | Zendy; Bárbara Carrapa | Zendy; Yuchen Sun | Zendy; David L. Dettman | Zendy; James B. Chapman | Zendy; Jeremy K. Caves Rugenstein | Zendy; Mark T. Clementz | Zendy; Peter G. DeCelles | Zendy; Mi Wang | Zendy; Jie Chen | Zendy; Jay Quade | Zendy; Fei Wang | Zendy; Zaijun Li | Zendy; Ilhomjon Oimuhammadzoda | Zendy; Mustafo Gadoev | Zendy; Gerrit Lohmann | Zendy; Xu Zhang | Zendy; Fahu Chen | Zendy

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The role of the westerlies and orography in Asian hydroclimate since the late Oligocene

Author(s) -

Xin Wang,

Bárbara Carrapa,

Yuchen Sun,

David L. Dettman,

James B. Chapman,

Jeremy K. Caves Rugenstein,

Mark T. Clementz,

Peter G. DeCelles,

Mi Wang,

Jie Chen,

Jay Quade,

Fei Wang,

Zaijun Li,

Ilhomjon Oimuhammadzoda,

Mustafo Gadoev,

Gerrit Lohmann,

Xu Zhang,

Fahu Chen

Publication year - 2020

Publication title -

geology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.609

H-Index - 215

eISSN - 1943-2682

pISSN - 0091-7613

DOI - 10.1130/g47400.1

Subject(s) - westerlies , geology , aridification , orography , cenozoic , central asia , pluvial , denudation , paleoclimatology , physical geography , climatology , climate change , precipitation , paleontology , structural basin , tectonics , oceanography , geography , meteorology

Interactions between midlatitude westerlies and the Pamir–Tian Shan mountains significantly impact hydroclimate patterns in Central Asia today, and they played an important role in driving Asian aridification during the Cenozoic. We show that distinct west-east hydroclimate differences were established over Central Asia during the late Oligocene (ca. 25 Ma), as recorded by stable oxygen isotopic values of soil carbonates. Our climate simulations show that these differences are present when relief of the Pamir–Tian Shan is higher than 75% of modern elevation (∼3000 m). Integrated with geological evidence, we suggest that a significant portion of the Pamir–Tian Shan orogen had reached elevations of ∼3 km and acted as a moisture barrier for the westerlies since ca. 25 Ma.

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