气候变化领域集成服务门户(CCPortal): What Caused the Extreme Indian Ocean Dipole Event in 2019?

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DOI	10.1029/2020GL087768
	What Caused the Extreme Indian Ocean Dipole Event in 2019?
	Lu B.; Ren H.-L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	An extreme positive Indian Ocean Dipole (IOD) event occurred in 2019 boreal autumn, which has induced severe climate impacts around the Indian Ocean basin. In this study, the cause for 2019 IOD event and the related mechanism are explored. We find that the remarkable strengthening of Australian high and weakening of sea level pressure over South China Sea/Philippine Sea have been evidently visible since May 2019. Such a record-breaking interhemispheric pressure gradient (IHPG) induced northward cross-equatorial flow over the western Maritime Continent, which triggered strong wind-evaporation-SST and thermocline feedbacks in 2019. In addition to 2019 case, historical IOD events are highly correlated with IHPG from boreal late spring to summer. We show that skillful IHPG prediction can be made in March by European Centre for Medium-Range Weather Forecasts seasonal forecast system, which makes it quite possible for the early warning of extreme IOD events by two to three seasons ahead. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Sea level; Cross-equatorial flow; European centre for medium-range weather forecasts; Highly-correlated; Indian Ocean dipole; Indian ocean dipoles; Maritime Continent; Sea level pressure; Seasonal forecasts; Weather forecasting; extreme event; Indian Ocean Dipole; pressure gradient; sea level pressure; sea surface temperature; seasonal variation; thermocline; Australia; Indian Ocean; Pacific Ocean; Philippine Sea; South China Sea
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/170308
作者单位	Laboratory for Climate Studies and CMA-NJU Joint Laboratory for Climate Prediction Studies, National Climate Center, China Meteorological Administration, Beijing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Department of Atmospheric Science, School of Environmental Studies, China University of Geoscience, Wuhan, China
推荐引用方式 GB/T 7714	Lu B.,Ren H.-L.. What Caused the Extreme Indian Ocean Dipole Event in 2019?[J],2020,47(11).
APA	Lu B.,&Ren H.-L..(2020).What Caused the Extreme Indian Ocean Dipole Event in 2019?.Geophysical Research Letters,47(11).
MLA	Lu B.,et al."What Caused the Extreme Indian Ocean Dipole Event in 2019?".Geophysical Research Letters 47.11(2020).