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

C. He; Z. Liu; B. L. Otto-Bliesner; E.C. Brady; C. Zhu; R. Tomas; P.U. Clark; J. Zhu; A. Jahn; S. Gu; J. Zhang; J. Nusbaumer; D. Noone; H. Cheng; Y. Wang; M. Yan; Y. Bao

doi:10.1126/sciadv.abe2611

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

C. He, Z. Liu, B. L. Otto-Bliesner, E.C. Brady, C. Zhu, R. Tomas, P.U. Clark, J. Zhu, A. Jahn, S. Gu, J. Zhang, J. Nusbaumer, D. Noone, H. Cheng, Y. Wang, M. Yan, Y. Bao

Faculty Of Life & Health Sciences

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Abstract

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 δ18Oc 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 δ18Op 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.

Original language	English
Article number	eabe2611
Pages (from-to)	1-12
Number of pages	12
Journal	Science Advances
Volume	7
Issue number	4
DOIs	https://doi.org/10.1126/sciadv.abe2611
Publication status	Published (in print/issue) - 22 Jan 2021

Bibliographical note

Funding Information:
This work is supported by Chinese NSFC 41630527; U.S. NSF 1810682, 1810681, 1401803, and 1656907; Chinese NSFC 41888101; MOST2017YFA0603801; Nanjing Univ. Inf. Sci. & Tech. and Nanjing Normal University. The CESM project is supported primarily by the NSF. This material is based on work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the NSF under Cooperative Agreement no. 1852977. Computing and data storage resources, including the Cheyenne supercomputer (doi: 10.5065/D6RX99HX), were provided by the Computational and Information Systems Laboratory (CISL) at NCAR. D.N. was supported by NSF award 1502806.

Publisher Copyright:
Copyright © 2021 The Authors, some rights reserved.

Keywords

Multidisciplinary

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1126/sciadv.abe2611

sciadv.abe2611 (1)Final published version, 2.1 MBLicence: CC BY-NC

Cite this

He, C., Liu, Z., Otto-Bliesner, B. L., Brady, E. C., Zhu, C., Tomas, R., Clark, P. U., Zhu, J., Jahn, A., Gu, S., Zhang, J., Nusbaumer, J., Noone, D., Cheng, H., Wang, Y., Yan, M., & Bao, Y. (2021). Hydroclimate footprint of pan-Asian monsoon water isotope during the last deglaciation. Science Advances, 7(4), 1-12. Article eabe2611. https://doi.org/10.1126/sciadv.abe2611

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title = "Hydroclimate footprint of pan-Asian monsoon water isotope during the last deglaciation",

abstract = "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 δ18Oc 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 δ18Op 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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author = "C. He and Z. Liu and Otto-Bliesner, {B. L.} and E.C. Brady and C. Zhu and R. Tomas and P.U. Clark and J. Zhu and A. Jahn and S. Gu and J. Zhang and J. Nusbaumer and D. Noone and H. Cheng and Y. Wang and M. Yan and Y. Bao",

note = "Funding Information: This work is supported by Chinese NSFC 41630527; U.S. NSF 1810682, 1810681, 1401803, and 1656907; Chinese NSFC 41888101; MOST2017YFA0603801; Nanjing Univ. Inf. Sci. & Tech. and Nanjing Normal University. The CESM project is supported primarily by the NSF. This material is based on work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the NSF under Cooperative Agreement no. 1852977. Computing and data storage resources, including the Cheyenne supercomputer (doi: 10.5065/D6RX99HX), were provided by the Computational and Information Systems Laboratory (CISL) at NCAR. D.N. was supported by NSF award 1502806. Publisher Copyright: Copyright {\textcopyright} 2021 The Authors, some rights reserved.",

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AU - He, C.

AU - Liu, Z.

AU - Otto-Bliesner, B. L.

AU - Brady, E.C.

AU - Zhu, C.

AU - Tomas, R.

AU - Clark, P.U.

AU - Zhu, J.

AU - Jahn, A.

AU - Gu, S.

AU - Zhang, J.

AU - Nusbaumer, J.

AU - Noone, D.

AU - Cheng, H.

AU - Wang, Y.

AU - Yan, M.

AU - Bao, Y.

N1 - Funding Information: This work is supported by Chinese NSFC 41630527; U.S. NSF 1810682, 1810681, 1401803, and 1656907; Chinese NSFC 41888101; MOST2017YFA0603801; Nanjing Univ. Inf. Sci. & Tech. and Nanjing Normal University. The CESM project is supported primarily by the NSF. This material is based on work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the NSF under Cooperative Agreement no. 1852977. Computing and data storage resources, including the Cheyenne supercomputer (doi: 10.5065/D6RX99HX), were provided by the Computational and Information Systems Laboratory (CISL) at NCAR. D.N. was supported by NSF award 1502806. Publisher Copyright: Copyright © 2021 The Authors, some rights reserved.

PY - 2021/1/22

Y1 - 2021/1/22

N2 - 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 δ18Oc 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 δ18Op 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.

AB - 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 δ18Oc 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 δ18Op 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.

KW - Multidisciplinary

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U2 - 10.1126/sciadv.abe2611

DO - 10.1126/sciadv.abe2611

M3 - Article

C2 - 33523950

SN - 2375-2548

VL - 7

SP - 1

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JO - Science Advances

JF - Science Advances

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M1 - eabe2611

ER -

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

Abstract

Bibliographical note

Keywords

UN SDGs

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