气候变化领域集成服务门户(CCPortal): Weakened SST variability in the tropical Atlantic Ocean since 2000

CCPortal

DOI	10.1007/s00382-020-05138-0
	Weakened SST variability in the tropical Atlantic Ocean since 2000
	Prigent A.; Lübbecke J.F.; Bayr T.; Latif M.; Wengel C.
发表日期	2020
ISSN	0930-7575
起始页码	2731
结束页码	2744
卷号	54
英文摘要	A prominent weakening in equatorial Atlantic sea surface temperature (SST) variability, occurring around the year 2000, is investigated by means of observations, reanalysis products and the linear recharge oscillator (ReOsc) model. Compared to the time period 1982–1999, during 2000–2017 the May–June–July SST variability in the eastern equatorial Atlantic has decreased by more than 30%. Coupled air–sea feedbacks, namely the positive Bjerknes feedback and the negative net heat flux damping are important drivers for the equatorial Atlantic interannual SST variability. We find that the Bjerknes feedback weakened after 2000 while the net heat flux damping increased. The weakening of the Bjerknes feedback does not appear to be fully explainable by changes in the mean state of the tropical Atlantic. The increased net heat flux damping is related to an enhanced response of the latent heat flux to the SST anomalies (SSTa). Strengthened trade winds as well as warmer SSTs are suggested to increase the air–sea specific humidity difference and hence, enhancing the latent heat flux response to SSTa. A combined effect of those two processes is proposed to be responsible for the weakened SST variability in the eastern equatorial Atlantic. The ReOsc model supports the link between reduced SST variability, weaker Bjerknes feedback and stronger net heat flux damping. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Atlantic Niño; Bjerknes feedback; Net heat flux damping; Ocean and atmosphere dynamics
语种	英语
scopus关键词	air-sea interaction; heat flux; relative humidity; sea surface temperature; temperature profile; warming; Atlantic Ocean; Atlantic Ocean (Equatorial); Atlantic Ocean (Tropical)
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/145569
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Faculty of Mathematics and Natural Sciences, Christian Albrechts University, Kiel, Germany; Center for Climate Physics, Institute for Basic Science, Busan, South Korea
推荐引用方式 GB/T 7714	Prigent A.,Lübbecke J.F.,Bayr T.,et al. Weakened SST variability in the tropical Atlantic Ocean since 2000[J],2020,54.
APA	Prigent A.,Lübbecke J.F.,Bayr T.,Latif M.,&Wengel C..(2020).Weakened SST variability in the tropical Atlantic Ocean since 2000.Climate Dynamics,54.
MLA	Prigent A.,et al."Weakened SST variability in the tropical Atlantic Ocean since 2000".Climate Dynamics 54(2020).