Hydroclimate footprint of pan-Asian monsoon water isotope during the last deglaciation | Zendy

Chengfei He | Zendy; Zhengyu Liu | Zendy; Bette L. OttoBliesner | Zendy; Esther C. Brady | Zendy; Chenyu Zhu | Zendy; Robert A. Tomas | Zendy; Peter U. Clark | Zendy; Jiang Zhu | Zendy; Alexandra Jahn | Zendy; Sifan Gu | Zendy; Jiaxu Zhang | Zendy; Jesse Nusbaumer | Zendy; David Noone | Zendy; Hai Cheng | Zendy; Yongjin Wang | Zendy; Mi Yan | Zendy; Yuntao Bao | Zendy

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Hydroclimate footprint of pan-Asian monsoon water isotope during the last deglaciation

Author(s) -

Chengfei He,

Zhengyu Liu,

Bette L. OttoBliesner,

Esther C. Brady,

Chenyu Zhu,

Robert A. Tomas,

Peter U. Clark,

Jiang Zhu,

Alexandra Jahn,

Sifan Gu,

Jiaxu Zhang,

Jesse Nusbaumer,

David Noone,

Hai Cheng,

Yongjin Wang,

Mi Yan,

Yuntao Bao

Publication year - 2021

Publication title -

science advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.928

H-Index - 146

ISSN - 2375-2548

DOI - 10.1126/sciadv.abe2611

Subject(s) - deglaciation , monsoon , footprint , geology , oceanography , east asian monsoon , environmental science , isotope , physical geography , climatology , earth science , geography , holocene , paleontology , physics , quantum mechanics

Oxygen isotope speleothem records exhibit coherent variability over the pan-Asian summer monsoon (AM) region. The hydroclimatic representation of these oxygen isotope records for the AM, however, has remained poorly understood. Here, combining an isotope-enabled Earth system model in transient experiments with proxy records, we show that the widespread AM δ 18 O c signal during the last deglaciation (20 to 11 thousand years ago) is accompanied by a continental-scale, coherent hydroclimate footprint, with spatially opposite signs in rainfall. This footprint is generated as a dynamically coherent response of the AM system primarily to meltwater forcing and secondarily to insolation forcing and is further reinforced by atmospheric teleconnection. Hence, widespread δ 18 O p depletion in the AM region is accompanied by a northward migration of the westerly jet and enhanced southwesterly monsoon wind, as well as increased rainfall from South Asia (India) to northern China but decreased rainfall in southeast China.

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