Amazon drought amplifies SST warming in the North Tropical Atlantic

被引：0
|
作者：
Lou, Wei [1 ]
Sun, Cheng [1 ]
Kucharski, Fred [2 ]
Li, Jianping [3 ,4 ]
Liu, Yusen [1 ]
机构：
[1] Beijing Normal Univ, Fac Geog Sci, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China
[2] Abdus Salam Int Ctr Theoret Phys, Trieste, Italy
[3] Ocean Univ China, Acad Future Ocean, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Phys Oceanog,Coll Ocean & Atmospher Sci,Ct, Qingdao 266100, Peoples R China
[4] Laoshan Lab, Qingdao 266237, Peoples R China
来源：
CLIMATE DYNAMICS | 2024年 / 62卷 / 09期
基金：
中国国家自然科学基金;
关键词：
North Tropical Atlantic; Amplified SST warming; Amazon drought; Local hadley circulation; Land-atmosphere-ocean interactions; SEA-SURFACE TEMPERATURE; MOISTURE-RAINFALL FEEDBACK; EL-NINO; CLIMATE-CHANGE; VARIABILITY; DEFORESTATION; ENSO; PRECIPITATION; IMPACTS; MEMORY;
D O I：
10.1007/s00382-024-07400-1
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
North Tropical Atlantic (NTA) has been warming rapidly in the winter, with a warming rate that exceeds the global average sea surface temperature (SST). However, the reasons for this enhanced warming remain unclear. Here we suggest that Amazon drought contributes to the rapid NTA warming. Observational analyses reveal that Amazon Soil Moisture (ASM) in autumn shows a significant inverse relationship with NTA SST in winter. Decreased ASM in autumn, persists via Land-Atmosphere (L-A) feedback, leads to weakened Hadley circulation over the Tropical Atlantic in winter. The Wind-Evaporation-SST (WES) feedback mechanism further causes the warming of NTA SST. Simulations from CMIP6 fully coupled models and SM-forced mixed layer ocean model suggest that the Amazon drought weakens the Hadley circulation over the Tropical Atlantic and warms the NTA SST. An ASM-based empirical model reproduces the observed NTA SST variations (r = 0.72, p < 0.05), further highlighting a role for Amazon drought in amplifying ocean warming.
引用
收藏
页码：9377 / 9390
页数：14
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