Deciphering local and regional hydroclimate resolves contradicting evidence on the Asian monsoon evolution

Annabel Wolf (), Vasile Ersek (), Tobias Braun, Amanda D. French, David McGee, Stefano M. Bernasconi, Vanessa Skiba, Michael L. Griffiths, Kathleen R. Johnson, Jens Fohlmeister, Sebastian F. M. Breitenbach, Francesco S. R. Pausata, Clay R. Tabor, Jack Longman, William H. G. Roberts, Deepak Chandan, W. Richard Peltier, Ulrich Salzmann, Deborah Limbert, Hong Quan Trinh and Anh Duc Trinh
Additional contact information
Annabel Wolf: University of California
Vasile Ersek: Northumbria University Newcastle
Tobias Braun: Potsdam Institute for Climate Impact Research
Amanda D. French: Waikato University
David McGee: Massachusetts Institute of Technology
Stefano M. Bernasconi: ETH Zürich
Vanessa Skiba: Potsdam Institute for Climate Impact Research
Michael L. Griffiths: William Paterson University
Kathleen R. Johnson: University of California
Jens Fohlmeister: Federal Office for Radiations Protection
Sebastian F. M. Breitenbach: Northumbria University Newcastle
Francesco S. R. Pausata: University of Quebec in Montreal
Clay R. Tabor: University of Connecticut
Jack Longman: Northumbria University Newcastle
William H. G. Roberts: Northumbria University Newcastle
Deepak Chandan: University of Toronto
W. Richard Peltier: University of Toronto
Ulrich Salzmann: Northumbria University Newcastle
Deborah Limbert: Phong Nha Bố Trạch
Hong Quan Trinh: Vietnam Academy of Science and Technology
Anh Duc Trinh: Vietnam Atomic Energy Institute

Nature Communications, 2023, vol. 14, issue 1, 1-14

Abstract: Abstract The winter and summer monsoons in Southeast Asia are important but highly variable sources of rainfall. Current understanding of the winter monsoon is limited by conflicting proxy observations, resulting from the decoupling of regional atmospheric circulation patterns and local rainfall dynamics. These signals are difficult to decipher in paleoclimate reconstructions. Here, we present a winter monsoon speleothem record from Southeast Asia covering the Holocene and find that winter and summer rainfall changed synchronously, forced by changes in the Pacific and Indian Oceans. In contrast, regional atmospheric circulation shows an inverse relation between winter and summer controlled by seasonal insolation over the Northern Hemisphere. We show that disentangling the local and regional signal in paleoclimate reconstructions is crucial in understanding and projecting winter and summer monsoon variability in Southeast Asia.

Date: 2023
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DOI: 10.1038/s41467-023-41373-9

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