气候变化领域集成服务门户(CCPortal): The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations

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DOI	10.1175/JCLI-D-20-0269.1
	The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations
	Joshi M.K.; Abid M.A.; Kucharski F.
发表日期	2021
ISSN	0894-8755
起始页码	1047
结束页码	1060
卷号	34 期号:3
英文摘要	In this study the role of an Indian Ocean heating dipole anomaly in the transition of the North Atlantic–European (NAE) circulation response to El Niño–Southern Oscillation (ENSO) from early to late winter is analyzed using a twentieth-century reanalysis and simulations from phase 5 of the Coupled Model Intercomparison Project (CMIP5). It is shown that in early winter a warm (cold) ENSO event is connected through an atmospheric bridge with positive (negative) rainfall anomalies in the western Indian Ocean and negative (positive) anomalies in the eastern Indian Ocean. The early winter heating dipole, forced by a warm (cold) ENSO event, can set up a wave train emanating from the subtropical South Asian jet region that reaches the North Atlantic and leads to a response that spatially projects onto the positive (negative) phase of the North Atlantic Oscillation. The Indian Ocean heating dipole is partly forced as an atmospheric teleconnection by ENSO, but can also exist independently and is not strongly related to local Indian Ocean sea surface temperature (SST) forcing. The Indian Ocean heating dipole response to ENSO is much weaker in late winter (i.e., February and March) and not able to force significant signals in the North Atlantic region. CMIP5 multimodel ensemble reproduces the early winter Indian Ocean heating dipole response to ENSO and its transition in the North Atlantic region to some extent, but with weaker amplitude. Generally, models that have a strong early winter ENSO response in the subtropical South Asian jet region along with tropical Indian Ocean heating dipole also reproduce the North Atlantic response. © 2021 American Meteorological Society.
英文关键词	Atmospheric pressure; Climate models; Climatology; Heating; Surface waters; Tropics; Coupled Model Intercomparison Project; Multi-model ensemble; North Atlantic oscillations; Sea surface temperature (SST); Southern oscillation; Tropical Indian ocean; Twentieth century; Western indian oceans; Oceanography
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170929
作者单位	Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India; Earth System Physics, Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Centre of Excellence for Climate Change Research (CECCR), Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia
推荐引用方式 GB/T 7714	Joshi M.K.,Abid M.A.,Kucharski F.. The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations[J],2021,34(3).
APA	Joshi M.K.,Abid M.A.,&Kucharski F..(2021).The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations.Journal of Climate,34(3).
MLA	Joshi M.K.,et al."The Role of an Indian Ocean Heating Dipole in the ENSO Teleconnection to the North Atlantic European Region in Early Winter during the Twentieth Century in Reanalysis and CMIP5 Simulations".Journal of Climate 34.3(2021).