DOI: 10.1175/JCLI-D-16-0132.1
Scopus记录号: 2-s2.0-85020026173
论文题名: Northern hemisphere stratospheric pathway of different El Niño flavors in stratosphere-resolving CMIP5 models
作者: Calvo N. ; Iza M. ; Hurwitz M.M. ; Manzini E. ; Peña-Ortiz C. ; Butler A.H. ; Cagnazzo C. ; Ineson S. ; Garfinkel C.I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 12 起始页码: 4351
结束页码: 4371
语种: 英语
Scopus关键词: Nickel
; Troposphere
; Upper atmosphere
; Wave propagation
; Constructive interference
; Coupled Model Intercomparison Project
; EL Nino
; Historical simulation
; Northern hemisphere
; Northern Hemispheres
; Polar stratosphere
; Stratospheric circulations
; Climate models
; atmospheric circulation
; climate modeling
; CMIP
; El Nino
; Northern Hemisphere
; polar vortex
; stratosphere
; teleconnection
; troposphere
; Canada
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (East)
英文摘要: The Northern Hemisphere (NH) stratospheric signals of eastern Pacific (EP) and central Pacific (CP) El Niño events are investigated in stratosphere-resolving historical simulations from phase 5 of the Coupled Model Intercomparison Project (CMIP5), together with the role of the stratosphere in driving tropospheric El Niño teleconnections in NH climate. The large number of events in each composite addresses some of the previously reported concerns related to the short observational record. The results shown here highlight the importance of the seasonal evolution of the NH stratospheric signals for understanding the EP and CP surface impacts. CMIP5 models show a significantly warmer and weaker polar vortex during EP El Niño. No significant polar stratospheric response is found during CP El Niño. This is a result of differences in the timing of the intensification of the climatological wavenumber 1 through constructive interference, which occurs earlier in EP than CP events, related to the anomalous enhancement and earlier development of the Pacific-North American pattern in EP events. The northward extension of the Aleutian low and the stronger and eastward location of the high over eastern Canada during EP events are key in explaining the differences in upward wave propagation between the two types of El Niño. The influence of the polar stratosphere in driving tropospheric anomalies in the North Atlantic European region is clearly shown during EP El Niño events, facilitated by the occurrence of stratospheric summer warmings, the frequency of which is significantly higher in this case. In contrast, CMIP5 results do not support a stratospheric pathway for a remote influence of CP events on NH teleconnections. © 2017 American Meteorological Society. 资助项目: ISF, Israel Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49635
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Departamento Fisica de la Tierra II, Universidad Complutense de Madrid, Madrid, Spain; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Sciences Technology and Research, Morgan State University, Baltimore, MD, United States; Max Planck Institute for Meteorology, Hamburg, Germany; Universidad Pablo de Olavide, Sevilla, Spain; Chemical Sciences Division, NOAA/ESRL, and CIRES, Boulder, CO, United States; Instituto di Fisica dell'Atmosfera e del Clima, Consiglio Nazionale delle Ricerche, Rome, Italy; Met Office Hadley Centre, Exeter, United Kingdom; Fredy and Nadine Herrmann Institute of Earth Science, Hebrew University, Jerusalem, Israel; Science Systems and Applications, Inc., Lanham, MD, United States
Recommended Citation:
Calvo N.,Iza M.,Hurwitz M.M.,et al. Northern hemisphere stratospheric pathway of different El Niño flavors in stratosphere-resolving CMIP5 models[J]. Journal of Climate,2017-01-01,30(12)