DOI: | 10.1175/JCLI-D-13-00763.1
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Scopus记录号: | 2-s2.0-84919681363
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论文题名: | Local wintertime tropospheric response to oceanic heat anomalies in the Nordic seas area |
作者: | Schlichtholz P.
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刊名: | Journal of Climate
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ISSN: | 8948755
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出版年: | 2014
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卷: | 27, 期:23 | 起始页码: | 8686
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结束页码: | 8706
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语种: | 英语
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Scopus关键词: | Boundary layers
; Budget control
; Friction
; Heat flux
; Heating
; Atmospheric circulation anomaly
; Atmospheric fields
; Atmospheric response
; Cyclonic disturbance
; Eddy-mean flow interaction
; Meridional overturning circulations
; Planetary boundary layers
; Tropospheric variability
; Troposphere
; atmospheric circulation
; boundary layer
; diabatic process
; heat budget
; heat flow
; overturn
; sea ice
; temperature anomaly
; tropopause
; troposphere
; vorticity
; water temperature
; winter
; Arctic Ocean
; Barents Sea
; Norwegian Sea
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英文摘要: | Aregression analysis between observed summertimeAtlantic water temperature anomalies at the entrance to the Barents Sea and atmospheric fields in the following winter from the NCEP-NCAR reanalysis in the period 1982-2006 is carried out. It shows that the ocean plays a key role in shapingwintertime tropospheric variability in the Nordic seas (Greenland-Iceland-Norwegian and Barents Seas) region. The oceanically driven atmospheric circulation anomaly around the Nordic seas marginal ice zone is intensified at the surface as a result of a thermally direct baroclinic adjustment. Frictional convergence in the cyclonic disturbance corresponding to warm ocean temperature anomalies forces ascending motion at the top of the planetary boundary layer and a compensating divergence aloft, which over the Barents Sea is extreme at the tropopause. A quasi-meridional overturning circulation anomaly is closed by descending motion south of the cyclonic disturbance. In addition, an equivalent barotropic flow anomaly appears in the upper troposphere. It is partly driven by eddy-mean flow interactions, as revealed by anomalies in the vorticity budget. The atmospheric response to oceanic forcing in the Nordic seas area is unique because of the prominent role of surface friction and because of specific profiles of diabatic heating and eddy heat flux convergence over the Barents Sea.As revealed by anomalies in the heat budget, the combined effect of diabatic heating and thermal eddy forcing acts, when the diabatic heating is positive, as a heat sink at the surface and a heat source aloft. The strongest anomalous heating occurs in the upper troposphere/lower stratosphere where it counteracts the dynamic cooling owing to anomalous ascending motion. © 2014 American Meteorological Society. |
资助项目: | NOAA, National Oceanic and Atmospheric Administration
; OAR, National Oceanic and Atmospheric Administration
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Citation statistics: |
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资源类型: | 期刊论文
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标识符: | http://119.78.100.158/handle/2HF3EXSE/51065
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Appears in Collections: | 气候变化事实与影响
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作者单位: | Institute of Oceanology, Polish Academy of Sciences, Sopot, Poland
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Recommended Citation: |
Schlichtholz P.. Local wintertime tropospheric response to oceanic heat anomalies in the Nordic seas area[J]. Journal of Climate,2014-01-01,27(23)
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