气候变化领域集成服务门户(CCPortal): Roles of the atmosphere and ocean in the projected north atlantic warming hole

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DOI	10.1007/s00382-024-07289-w
	Roles of the atmosphere and ocean in the projected north atlantic warming hole
	Li, Qiuxian; Luo, Yiyong; Lu, Jian; Liu, Fukai; Teng, Heli
发表日期	2024
ISSN	0930-7575
EISSN	1432-0894
英文摘要	There exists a warming deficit in sea surface temperatures (SST) over the subpolar North Atlantic in response to quadrupled CO2, referred to as the projected North Atlantic warming hole (WH). This study employs a partial coupling technique to accurately verify the relative roles of oceanic and atmospheric processes in the formation of the projected WH within an atmosphere-ocean coupled framework. By decomposing the SST anomalies in the subpolar North Atlantic into two components: those induced by atmospheric processes (i.e., the atmosphere-forced component) and those driven by changes in ocean circulation (i.e., the ocean-driven component), we find that the projected WH is primarily driven by changes in ocean circulation, with almost no contribution from atmospheric processes. Specifically, the slowdown of the Atlantic Meridional Overturning Circulation (AMOC) results in a cooling of SST in the WH region due to reduced northward ocean heat transport into this region. This study further quantifies the influence of a positive coupled feedback through surface heat flux (SHF) on the AMOC response under greenhouse gas forcing within this self-consistent framework. It is found that the AMOC slowdown leads to a negative SST anomaly in the subpolar North Atlantic and subsequently a positive ocean-driven SHF anomaly, which in turn further weakens the AMOC. This positive feedback through the SHF contributes about 50% to the total AMOC slowdown in response to quadrupled CO2.
英文关键词	Sea surface temperature; North atlantic warming hole; Atlantic meridional overturning circulation; Surface heat flux
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001236139900001
来源期刊	CLIMATE DYNAMICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297905
作者单位	Ocean University of China; Ocean University of China; Ocean University of China; United States Department of Energy (DOE); Pacific Northwest National Laboratory; National Satellite Ocean Application Service
推荐引用方式 GB/T 7714	Li, Qiuxian,Luo, Yiyong,Lu, Jian,et al. Roles of the atmosphere and ocean in the projected north atlantic warming hole[J],2024.
APA	Li, Qiuxian,Luo, Yiyong,Lu, Jian,Liu, Fukai,&Teng, Heli.(2024).Roles of the atmosphere and ocean in the projected north atlantic warming hole.CLIMATE DYNAMICS.
MLA	Li, Qiuxian,et al."Roles of the atmosphere and ocean in the projected north atlantic warming hole".CLIMATE DYNAMICS (2024).