气候变化领域集成服务门户(CCPortal): Separating the indian and pacific ocean impacts on the euro-atlantic response to enso and its transition from early to late winter

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DOI	10.1175/JCLI-D-20-0075.1
	Separating the indian and pacific ocean impacts on the euro-atlantic response to enso and its transition from early to late winter
	Abid M.A.; Kucharski F.; Molteni F.; Kang I.-S.; Tompkins A.M.; Almazroui M.
发表日期	2021
ISSN	08948755
起始页码	1531
结束页码	1548
卷号	34 期号:4
英文摘要	The present study focuses on the mechanism that controls the transition of the Euro-Atlantic circulation responses to El Niño–Southern Oscillation (ENSO) from early (December) to late winter (February) for the period 1981–2015. A positive phase of ENSO induces a precipitation dipole with increased precipitation in the western and reduced precipitation in the eastern tropical Indian Ocean; this occurs mainly during early winter (December) and less so in late winter (February). It is shown that these interbasin atmospheric teleconnections dominate the response in the Euro-Atlantic sector in early winter by modifying the subtropical South Asian jet (SAJET) and forcing a wavenumber-3 response that projects spatially onto the positive North Atlantic Oscillation (NAO) pattern. On the contrary, during late winter, the response in the Euro-Atlantic sector is dominated by the well-known ENSO wave train from the tropical Pacific region, involving extratropical anomalies that project spatially on the positive phase of the Pacific–North American (PNA) pattern and the negative phase of the NAO pattern. Numerical experiments with an atmospheric model (an AGCM) forced by an Indian Ocean heating dipole anomaly support the hypothesis that the Indian Ocean modulates the SAJET and enforces the Rossby wave propagation to the Euro-Atlantic region in early winter. These phenomena are also investigated using the ECMWF SEAS5 reforecast dataset. In SEAS5, the ENSO interbasin tropical teleconnections and the response of the Euro-Atlantic circulation anomalies and their change from early to late winter are realistically predicted, although the strength of the early winter signal originated from the Indian Ocean is underestimated. Ó 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Atmosphere-ocean interaction; Dynamics; ENSO; Indian Ocean; North Atlantic Oscillation; Teleconnections
语种	英语
scopus关键词	Atmospheric pressure; Climatology; Mechanical waves; Tropics; Wave propagation; American meteorological societies; Atmospheric teleconnections; Circulation anomalies; Copyright informations; North Atlantic oscillations; Numerical experiments; ROSSBY wave propagation; Tropical Indian ocean; Ocean currents; air-sea interaction; atmosphere-ocean system; El Nino-Southern Oscillation; ensemble forecasting; North Atlantic Oscillation; weather forecasting; winter; Indian Ocean; Pacific Ocean
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/178642
作者单位	Earth System Physics, Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Centre of Excellence for Climate Change Research, Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia; European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom; Indian Ocean Center, State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; School of Oceanography, Shanghai Jiaotang University, Shanghai, China
推荐引用方式 GB/T 7714	Abid M.A.,Kucharski F.,Molteni F.,et al. Separating the indian and pacific ocean impacts on the euro-atlantic response to enso and its transition from early to late winter[J],2021,34(4).
APA	Abid M.A.,Kucharski F.,Molteni F.,Kang I.-S.,Tompkins A.M.,&Almazroui M..(2021).Separating the indian and pacific ocean impacts on the euro-atlantic response to enso and its transition from early to late winter.Journal of Climate,34(4).
MLA	Abid M.A.,et al."Separating the indian and pacific ocean impacts on the euro-atlantic response to enso and its transition from early to late winter".Journal of Climate 34.4(2021).