DOI: 10.1175/JCLI-D-13-00644.1
Scopus记录号: 2-s2.0-84904488725
论文题名: Compensation between resolved wave driving and parameterized orographic gravity wave driving of the Brewer-Dobson circulation and its response to climate change
作者: Sigmond M. ; Shepherd T.G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 14 起始页码: 5601
结束页码: 5610
语种: 英语
Scopus关键词: Atmospherics
; Carbon dioxide
; Climate models
; Drag
; Gravity waves
; Waves
; Brewer-Dobson circulation
; High Latitudes
; Impact of changes
; Northern Hemispheres
; Orographic gravity waves
; Parameterized
; Planetary Waves
; Stratospheric circulations
; Climate change
; atmospheric circulation
; climate change
; climate modeling
; gravity wave
; Northern Hemisphere
; orographic effect
; parameterization
; planetary wave
; Rossby wave
; stratosphere
英文摘要: Following recent findings, the interaction between resolved (Rossby) wave drag and parameterized orographic gravity wave drag (OGWD) is investigated, in terms of their driving of the Brewer-Dobson circulation (BDC), in a comprehensive climate model. To this end, the parameter that effectively determines the strength of OGWD in present-day and doubled CO2 simulations is varied. The authors focus on the Northern Hemisphere during winter when the largest response of the BDC to climate change is predicted to occur. It is found that increases in OGWD are to a remarkable degree compensated by a reduction in midlatitude resolved wave drag, thereby reducing the impact of changes in OGWD on the BDC. This compensation is also found for the response to climate change: changes in the OGWD contribution to the BDC response to climate change are compensated by opposite changes in the resolved wave drag contribution to the BDC response to climate change, thereby reducing the impact of changes in OGWD on the BDC response to climate change. By contrast, compensation does not occur at northern high latitudes, where resolved wave driving and the associated downwelling increase with increasing OGWD, both for the present-day climate and the response to climate change. These findings raise confidence in the credibility of climate model projections of the strengthened BDC. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51120
Appears in Collections: 气候变化事实与影响
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作者单位: Canadian Centre for Climate Modelling and Analysis, Environment Canada, Victoria, BC, Canada; Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Sigmond M.,Shepherd T.G.. Compensation between resolved wave driving and parameterized orographic gravity wave driving of the Brewer-Dobson circulation and its response to climate change[J]. Journal of Climate,2014-01-01,27(14)