气候变化领域集成服务门户(CCPortal): Tropical Instability Waves in the Atlantic Ocean: Investigating the Relative Role of Sea Surface Salinity and Temperature From 2010 to 2018

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DOI	10.1029/2020JC016641
	Tropical Instability Waves in the Atlantic Ocean: Investigating the Relative Role of Sea Surface Salinity and Temperature From 2010 to 2018
	Olivier L.; Reverdin G.; Hasson A.; Boutin J.
发表日期	2020
ISSN	21699275
卷号	125 期号:12
英文摘要	We identify and analyze tropical instability waves (TIWs) in the equatorial Atlantic Ocean during 2010–2018 using satellite derived observations of sea surface salinity (SSS), sea surface temperature (SST), sea level anomaly, and Argo profiles. In particular, the weekly 50-km resolution SSS time series from the climate change initiative project provides an unprecedented opportunity to observe the salinity structure at a scale closer to the SST scale. We examine the relative contributions of SSS and SST to the horizontal surface density gradient on seasonal and interannual time scales and how they contribute to the TIW properties and energetics. For the central Atlantic TIWs, the maximum of the SST contribution to the density anomaly lags the SSS one by approximately one month. Argo vertical profiles indicate that temperature and salinity both significantly contribute to TIW-related density anomalies. In May–June, salinity contributes to 50% of the perturbation potential energy in the top 60 m, and between 30% and 45% from July to September. While variations in SST appear to be related to dynamic processes, the interannual variability of SSS is also influenced by precipitations. However, the two leading modes of variability in the region (Atlantic Meridional and Zonal modes) do not well explain at 1°N these interannual variations. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	equatorial atlantic ocean; interannual variability; sea surface salinity; sea surface temperature; seasonal variability; tropical instability waves
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186563
作者单位	Sorbonne Université, CNRS, IRD, MNHN, UMR 7159, Laboratoire d'Océanographie et du Climat: Expérimentations et Approches Numériques, LOCEAN-IPSL, Paris, France; Université de Toulouse, CNES, CNRS, IRD, UPS, Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Toulouse, France
推荐引用方式 GB/T 7714	Olivier L.,Reverdin G.,Hasson A.,et al. Tropical Instability Waves in the Atlantic Ocean: Investigating the Relative Role of Sea Surface Salinity and Temperature From 2010 to 2018[J],2020,125(12).
APA	Olivier L.,Reverdin G.,Hasson A.,&Boutin J..(2020).Tropical Instability Waves in the Atlantic Ocean: Investigating the Relative Role of Sea Surface Salinity and Temperature From 2010 to 2018.Journal of Geophysical Research: Oceans,125(12).
MLA	Olivier L.,et al."Tropical Instability Waves in the Atlantic Ocean: Investigating the Relative Role of Sea Surface Salinity and Temperature From 2010 to 2018".Journal of Geophysical Research: Oceans 125.12(2020).