TY - JOUR
T1 - Remote and local drivers of pleistocene South Asian summer monsoon precipitation
T2 - A test for future predictions
AU - Clemens, Steven C.
AU - Yamamoto, Masanobu
AU - Thirumalai, Kaustubh
AU - Giosan, Liviu
AU - Richey, Julie N.
AU - Nilsson-Kerr, Katrina
AU - Rosenthal, Yair
AU - Anand, Pallavi
AU - McGrath, Sarah M.
N1 - Publisher Copyright:
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
PY - 2021/6
Y1 - 2021/6
N2 - South Asian precipitation amount and extreme variability are predicted to increase due to thermodynamic effects of increased 21st-century greenhouse gases, accompanied by an increased supply of moisture from the southern hemisphere Indian Ocean. We reconstructed South Asian summer monsoon precipitation and runoff into the Bay of Bengal to assess the extent to which these factors also operated in the Pleistocene, a time of large-scale natural changes in carbon dioxide and ice volume. South Asian precipitation and runoff are strongly coherent with, and lag, atmospheric carbon dioxide changes at Earth’s orbital eccentricity, obliquity, and precession bands and are closely tied to cross-equatorial wind strength at the precession band. We find that the projected monsoon response to ongoing, rapid high-latitude ice melt and rising carbon dioxide levels is fully consistent with dynamics of the past 0.9 million years.
AB - South Asian precipitation amount and extreme variability are predicted to increase due to thermodynamic effects of increased 21st-century greenhouse gases, accompanied by an increased supply of moisture from the southern hemisphere Indian Ocean. We reconstructed South Asian summer monsoon precipitation and runoff into the Bay of Bengal to assess the extent to which these factors also operated in the Pleistocene, a time of large-scale natural changes in carbon dioxide and ice volume. South Asian precipitation and runoff are strongly coherent with, and lag, atmospheric carbon dioxide changes at Earth’s orbital eccentricity, obliquity, and precession bands and are closely tied to cross-equatorial wind strength at the precession band. We find that the projected monsoon response to ongoing, rapid high-latitude ice melt and rising carbon dioxide levels is fully consistent with dynamics of the past 0.9 million years.
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U2 - 10.1126/sciadv.abg3848
DO - 10.1126/sciadv.abg3848
M3 - Article
C2 - 34088672
AN - SCOPUS:85107311145
SN - 2375-2548
VL - 7
JO - Science Advances
JF - Science Advances
IS - 23
M1 - eabg3848
ER -