Greening of the Sahara suppressed ENSO activity during the mid-Holocene

被引：69

作者：

Pausata, Francesco S. R. ^{[1
,2
,3
]}

Zhang, Qiong ^{[2
,4
]}

Muschitiello, Francesco ^{[2
,5
,6
,7
,8
]}

Lu, Zhengyao ^{[9
]}

Chafik, Leon ^{[8
,10
]}

Niedermeyer, Eva M. ^{[11
]}

Stager, J. Curt ^{[12
]}

Cobb, Kim M. ^{[13
]}

Liu, Zhengyu ^{[9
,14
,15
]}

机构：

[1] Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden

[2] Bolin Ctr Climate Res, S-10691 Stockholm, Sweden

[3] Univ Quebec Montreal UQAM, Dept Earth & Atmospher Sci, Montreal, PQ H3C 3P8, Canada

[4] Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden

[5] Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden

[6] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA

[7] Uni Res Climate, N-5007 Bergen, Norway

[8] Bjerknes Ctr Climate Res, N-5007 Bergen, Norway

[9] Peking Univ, Sch Phys, LaCOAS, Beijing 100871, Peoples R China

[10] Geophys Inst, N-5007 Bergen, Norway

[11] Senckenberg Biodivers & Climate Res Ctr BiK F, D-60325 Frankfurt, Germany

[12] Paul Smiths Coll, Div Nat Sci, Paul Smiths, NY 12970 USA

[13] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[14] Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA

[15] Univ Wisconsin, Ctr Climat Res, Madison, WI 53706 USA

来源：

NATURE COMMUNICATIONS | 2017年 / 8卷

基金：

美国国家科学基金会; 瑞典研究理事会;

关键词：

TROPICAL PACIFIC CLIMATE; EL-NINO/SOUTHERN-OSCILLATION; AFRICAN MONSOON; INTERANNUAL VARIABILITY; SOUTHERN-OSCILLATION; HOLOCENE CHANGES; NINO; OCEAN; EVOLUTION; TERMINATION;

D O I：

10.1038/ncomms16020

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The evolution of the El Nino-Southern Oscillation (ENSO) during the Holocene remains uncertain. In particular, a host of new paleoclimate records suggest that ENSO internal variability or other external forcings may have dwarfed the fairly modest ENSO response to precessional insolation changes simulated in climate models. Here, using fully coupled ocean-atmosphere model simulations, we show that accounting for a vegetated and less dusty Sahara during the mid-Holocene relative to preindustrial climate can reduce ENSO variability by 25%, more than twice the decrease obtained using orbital forcing alone. We identify changes in tropical Atlantic mean state and variability caused by the momentous strengthening of the West Africa Monsoon (WAM) as critical factors in amplifying ENSO's response to insolation forcing through changes in the Walker circulation. Our results thus suggest that potential changes in the WAM due to anthropogenic warming may influence ENSO variability in the future as well.

引用

页数：12

共 75 条

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