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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Drier tropical and subtropical Southern Hemisphere in the mid-Pliocene Warm Period

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Pontes, Gabriel M. [1, 2] ; Wainer, Ilana [1] ; Taschetto, Andrea S. [2, 3] ; Sen Gupta, Alex [2, 3] ; Abe-Ouchi, Ayako [4] ; Brady, Esther C. [5] ; Chan, Wing-Le [4] ; Chandan, Deepak [6] ; Contoux, Camille [7] ; Feng, Ran [5] ; Hunter, Stephen J. [8] ; Kame, Yoichi [9] ; Lohmann, Gerrit [10] ; Otto-Bliesner, Bette L. [5] ; Peltier, W. Richard [6] ; Stepanek, Christian [10] ; Tindall, Julia [8] ; Tan, Ning [7, 11] ; Zhang, Qiong [12, 13] ; Zhang, Zhongshi [12, 13, 11, 14]
Total Authors: 20
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[1] Univ Sao Paulo, Oceanog Inst, Sao Paulo, SP - Brazil
[2] Univ New South Wales, Climate Change Res Ctr, Sydney, NSW - Australia
[3] Univ New South Wales, ARC Ctr Excellence Climate Extremes, Sydney, NSW - Australia
[4] Univ Tokyo, Ctr Earth Syst Dynam, Atmosphere & Ocean Res Inst, Tokyo - Japan
[5] Natl Ctr Atmospher Res, Boulder, CO 80307 - USA
[6] Univ Toronto, Dept Phys, Toronto, ON - Canada
[7] Univ Paris Saclay, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette - France
[8] Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire - England
[9] Univ Tsukuba, Fac Life & Environm Sci, Tsukuba, Ibaraki - Japan
[10] Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven - Germany
[11] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing - Peoples R China
[12] Stockholm Univ, Dept Phys Geog, Stockholm - Sweden
[13] Stockholm Univ, Bolin Ctr Climate Res, Stockholm - Sweden
[14] Bjerknes Ctr Climate Res, NORCE Norwegian Res Ctr, Bergen - Norway
Total Affiliations: 14
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 10, n. 1 AUG 10 2020.
Web of Science Citations: 0

Thermodynamic arguments imply that global mean rainfall increases in a warmer atmosphere; however, dynamical effects may result in more significant diversity of regional precipitation change. Here we investigate rainfall changes in the mid-Pliocene Warm Period (similar to 3 Ma), a time when temperatures were 2-3 degrees C warmer than the pre-industrial era, using output from the Pliocene Model Intercomparison Projects phases 1 and 2 and sensitivity climate model experiments. In the Mid-Pliocene simulations, the higher rates of warming in the northern hemisphere create an interhemispheric temperature gradient that enhances the southward cross-equatorial energy flux by up to 48%. This intensified energy flux reorganizes the atmospheric circulation leading to a northward shift of the Inter-Tropical Convergence Zone and a weakened and poleward displaced Southern Hemisphere Subtropical Convergences Zones. These changes result in drier-than-normal Southern Hemisphere tropics and subtropics. The evaluation of the mid-Pliocene adds a constraint to possible future warmer scenarios associated with differing rates of warming between hemispheres. (AU)

FAPESP's process: 16/23670-0 - The Mid-Pliocene South Atlantic and Southern Ocean circulations as reference for the 21st century climate
Grantee:Gabriel Marques Pontes
Support type: Scholarships in Brazil - Doctorate (Direct)