气候变化领域集成服务门户(CCPortal): Relevance of Relative Sea Surface Temperature for Tropical Rainfall Interannual Variability

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DOI	10.1029/2019GL086182
	Relevance of Relative Sea Surface Temperature for Tropical Rainfall Interannual Variability
	Izumo T.; Vialard J.; Lengaigne M.; Suresh I.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	The coupling between sea surface temperature (SST) anomalies and rainfall is an important driver of tropical climate variability. Observations however reveal inconsistencies, such as decreased convective rainfall in regions with positive SST anomalies in the tropical Indian and Atlantic Oceans during and after El Niño–Southern Oscillation (ENSO) events. The upper troposphere warms during El Niño events, stabilizing the atmosphere. SST anomalies only account for the influence of the surface. Using theoretical arguments, we show that relative SST (RSST; defined as SST minus its tropical mean) anomalies, by also accounting for the influence of upper tropospheric temperature anomalies on gross moist stability, explain tropical convection interannual variations better than SST anomalies in observations and climate models. This relation further improves when RSST anomalies are weighted by the precipitation climatology to account for low and high-precipitation regimes. Using RSST is thus essential to understand El Niño–Southern Oscillation teleconnections and interactions between modes of tropical climate variability. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric movements; Atmospheric pressure; Atmospheric temperature; Climate models; Climatology; Natural convection; Rain; Submarine geophysics; Surface properties; Surface waters; Tropics; Troposphere; Upper atmosphere; Air-sea coupling; Atmospheric convection; El Nino southern oscillation; Interannual variability; Sea surface temperature (SST); Oceanography; annual variation; atmospheric convection; climate effect; El Nino-Southern Oscillation; precipitation intensity; sea surface temperature; temperature anomaly; tropical region; troposphere; Atlantic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170801
作者单位	Institut de Recherche pour le Développement, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, IPSL, Paris, France; Formerly also at Indo-French Cell for Water Sciences, IISc-NIO-IITM–IRD Joint International Laboratory, NIOGoa, India; CSIR-National Institute of OceanographyGoa, India
推荐引用方式 GB/T 7714	Izumo T.,Vialard J.,Lengaigne M.,et al. Relevance of Relative Sea Surface Temperature for Tropical Rainfall Interannual Variability[J],2020,47(3).
APA	Izumo T.,Vialard J.,Lengaigne M.,&Suresh I..(2020).Relevance of Relative Sea Surface Temperature for Tropical Rainfall Interannual Variability.Geophysical Research Letters,47(3).
MLA	Izumo T.,et al."Relevance of Relative Sea Surface Temperature for Tropical Rainfall Interannual Variability".Geophysical Research Letters 47.3(2020).