DOI: 10.1002/2017JD027648
Scopus记录号: 2-s2.0-85044500795
论文题名: Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events
作者: Martineau P. ; Chen G. ; Son S.-W. ; Kim J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 6 起始页码: 3051
结束页码: 3070
语种: 英语
英文关键词: coupling
; interactions
; jet
; stratosphere
; troposphere
; vortex
Scopus关键词: air temperature
; coupling
; general circulation model
; jet
; Northern Hemisphere
; parameterization
; polar vortex
; stratosphere
; sudden stratospheric warming
; temperature profile
; troposphere
; wave propagation
英文摘要: The sensitivity of stratospheric polar vortex variability to the basic-state stratospheric temperature profile is investigated by performing a parameter sweep experiment with a dry dynamical core general circulation model where the equilibrium temperature profiles in the polar lower and upper stratosphere are systematically varied. It is found that stratospheric variability is more sensitive to the temperature distribution in the lower stratosphere than in the upper stratosphere. In particular, a cold lower stratosphere favors a strong time-mean polar vortex with a large daily variability, promoting frequent sudden stratospheric warming events in the model runs forced with both wavenumber-1 and wavenumber-2 topographies. This sensitivity is explained by the control exerted by the lower-stratospheric basic state onto fluxes of planetary-scale wave activity from the troposphere to the stratosphere, confirming that the lower stratosphere can act like a valve for the upward propagation of wave activity. It is further shown that with optimal model parameters, stratospheric polar vortex climatology and variability mimicking Southern and Northern Hemisphere conditions are obtained with both wavenumber-1 and wavenumber-2 topographies. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114261
Appears in Collections: 气候减缓与适应
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作者单位: Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Department of Atmospheric Sciences, Kongju National University, Gongju, South Korea
Recommended Citation:
Martineau P.,Chen G.,Son S.-W.,et al. Lower-Stratospheric Control of the Frequency of Sudden Stratospheric Warming Events[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(6)