气候变化领域集成服务门户(CCPortal): Tropical Indian Ocean Mediates ENSO Influence Over Central Southwest Asia During the Wet Season

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DOI	10.1029/2020GL089308
	Tropical Indian Ocean Mediates ENSO Influence Over Central Southwest Asia During the Wet Season
	Abid M.A.; Ashfaq M.; Kucharski F.; Evans K.J.; Almazroui M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	El Niño–Southern Oscillation (ENSO) modulates wet season (November–April) precipitation over Central Southwest Asia (CSWA), however, intraseasonal characteristics of its influence are largely unknown, which can be important for its subseasonal to seasonal hydroclimate predictability. Here we show that the ENSO-CSWA teleconnection varies intraseasonally and is a combination of direct and indirect positive influences. The direct influence is through a Rossby wave-like pattern in the tail months. The indirect influence is through an atmospheric dipole of diabatic heating anomalies in the tropical Indian Ocean (TIO) as a result of ENSO-forced response, which also generates a Rossby wave-like forcing and persists throughout the wet season. ENSO exerts its strongest influence when both direct and indirect modes are in phase, while the relationship breaks down when the two modes are out of phase. The atmospheric teleconnection through the atmospheric diabatic heating anomalies in the TIO is reproducible in numerical simulations. ©2020. The Authors.
英文关键词	Atmospheric pressure; Mechanical waves; Ocean currents; Tropics; Diabatic heating; Forced response; Intra-seasonal; Out of phase; Rossby wave; Southern oscillation; Teleconnections; Tropical Indian ocean; Climatology; climate forcing; diabatic process; El Nino-Southern Oscillation; hydrometeorology; Rossby wave; teleconnection; temperature anomaly; wet season; Asia; Indian Ocean; Indian Ocean (Tropical)
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/169717
作者单位	Earth System Physics, The Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy; Centre of Excellence for Climate Change Research (CECCR)/Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia; Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
推荐引用方式 GB/T 7714	Abid M.A.,Ashfaq M.,Kucharski F.,et al. Tropical Indian Ocean Mediates ENSO Influence Over Central Southwest Asia During the Wet Season[J],2020,47(18).
APA	Abid M.A.,Ashfaq M.,Kucharski F.,Evans K.J.,&Almazroui M..(2020).Tropical Indian Ocean Mediates ENSO Influence Over Central Southwest Asia During the Wet Season.Geophysical Research Letters,47(18).
MLA	Abid M.A.,et al."Tropical Indian Ocean Mediates ENSO Influence Over Central Southwest Asia During the Wet Season".Geophysical Research Letters 47.18(2020).