DOI: 10.1175/JCLI-D-16-0231.1
Scopus记录号: 2-s2.0-85000925932
论文题名: How does interhemispheric coupling contribute to cool down the summer polar mesosphere?
作者: Karlsson B. ; Becker E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 24 起始页码: 8807
结束页码: 8821
语种: 英语
Scopus关键词: Dynamics
; Gravity waves
; Atmospheric circulation
; Control simulation
; General circulation model
; Gravity wave drag
; Internal variability
; Middle atmosphere
; Planetary wave activity
; Residual circulations
; Ionosphere
英文摘要: Interhemispheric coupling is commonly associated with events of high planetary wave activity in the winter stratosphere triggering a heating of the polar mesopause region in the opposite hemisphere. Here, a more fundamental role that this mechanism plays in the absence of planetary wave variability is highlighted. This study focuses directly on the mesospheric part of the coupling chain, which is induced by the gravity wave drag in the winter mesosphere. To investigate the effect that the winter residual flow has on the summertime high-latitude upwelling, the Kühlungsborn Mechanistic General Circulation Model (KMCM) is used to compare a control simulation to runs where the parameterized gravity waves are removed from the winter hemisphere. The model response in the summer mesosphere reveals that the winter mesospheric residual circulation fosters a net (and substantial) cooling of the summer polar mesopause. These results offer an extension of the current view of interhemispheric coupling: from a mode of internal variability to a constant, gravity wave-driven phenomenon that is modulated by planetary wave activity. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50297
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Meteorology, Stockholm University, Stockholm, Sweden; Leibniz Institute of Atmospheric Physics, University of Rostock, Kühlungsborn, Germany
Recommended Citation:
Karlsson B.,Becker E.. How does interhemispheric coupling contribute to cool down the summer polar mesosphere?[J]. Journal of Climate,2016-01-01,29(24)