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Decomposition of physical processes controlling EASM precipitation changes during the mid-Piacenzian : new insights into data–model integration

Sun, Yong (author)
Wu, Haibin (author)
Ding, Lin (author)
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Chen, Lixin (author)
Stepanek, Christian (author)
Zhao, Yan (author)
Tan, Ning (author)
Su, Baohuang (author)
Yuan, Xiayu (author)
Zhang, Wenchao (author)
Liu, Bo (author)
Hunter, Stephen (author)
Haywood, Alan (author)
Abe-Ouchi, Ayako (author)
Otto-Bliesner, Bette (author)
Contoux, Camille (author)
Lunt, Daniel J. (author)
Dolan, Aisling (author)
Chandan, Deepak (author)
Lohmann, Gerrit (author)
Dowsett, Harry (author)
Tindall, Julia (author)
Baatsen, Michiel (author)
Peltier, W. Richard (author)
Li, Qiang, 1982- (author)
Stockholms universitet,Institutionen för naturgeografi
Feng, Ran (author)
Salzmann, Ulrich (author)
Chan, Wing-Le (author)
Zhang, Zhongshi (author)
Williams, Charles J. R. (author)
Ramstein, Gilles (author)
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 (creator_code:org_t)
2024
2024
English.
In: npj Climate and Atmospheric Science. - 2397-3722. ; 7
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The mid-Piacenzian warm period (MPWP, ~3.264–3.025 Ma) has gained widespread interest due to its partial analogy with future climate. However, quantitative data–model comparison of East Asian Summer Monsoon (EASM) precipitation during the MPWP is relatively rare, especially due to problems in decoding the imprint of physical processes to climate signals in the records. In this study, pollen-based precipitation records are reconstructed and compared to the multi-model ensemble mean of the Pliocene Model Intercomparison Project Phase 2 (PlioMIP2). We find spatially consistent precipitation increase in most simulations but a spatially divergent change in MPWP records. We reconcile proxy data and simulation by decomposing physical processes that control precipitation. Our results 1) reveal thermodynamic control of an overall enhancement of EASM precipitation and 2) highlight a distinct control of thermodynamic and dynamical processes on increases of tropical and subtropical EASM precipitation, reflecting the two pathways of water vapor supply that enhance EASM precipitation, respectively.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)

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