| DOI: | 10.1175/JCLI-D-12-00862.1
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| Scopus记录号: | 2-s2.0-84890219503
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| 论文题名: | The influence of the amoc variability on the atmosphere in CCSM3 |
| 作者: | Frankignoul C.; Gastineau G.; Kwon Y.-O.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2013
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| 卷: | 26, 期:24 | | 起始页码: | 9774
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| 结束页码: | 9790
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| 语种: | 英语
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| Scopus关键词: | Atlantic meridional overturning circulations
; Atmosphere-ocean interactions
; Atmospheric baroclinicity
; Atmospheric circulation
; Community climate system model
; Decadal variability
; North Atlantic oscillations
; Thermohaline circulations
; Atmospheric pressure
; Enthalpy
; Meteorology
; Ocean currents
; Sea level
; Climate models
; air-sea interaction
; atmospheric circulation
; baroclinic motion
; climate modeling
; decadal variation
; meridional circulation
; North Atlantic Oscillation
; overturn
; sea level pressure
; sea surface temperature
; storm track
; thermohaline circulation
; Atlantic Ocean
; Gulf Stream
; North Atlantic Current
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| 英文摘要: | The influence of the Atlantic meridional overturning circulation (AMOC) variability on the atmospheric circulation is investigated in a control simulation of the NCAR Community Climate System Model, version 3 (CCSM3), where the AMOC evolves from an oscillatory regime into a red noise regime. In the latter, an AMOC intensification is followed during winter by a positive North Atlantic Oscillation (NAO). The atmospheric response is robust and controlled by AMOC-driven SST anomalies, which shift the heat release to the atmosphere northward near the Gulf Stream/North Atlantic Current. This alters the low-level atmospheric baroclinicity and shifts the maximum eddy growth northward, affecting the storm track and favoring a positive NAO. TheAMOCinfluence is detected in the relation between seasonal upper-ocean heat content or SST anomalies and winter sea level pressure. In the oscillatory regime, no direct AMOC influence is detected in winter. However, an upper-ocean heat content anomaly resembling the AMOC footprint precedes a negative NAO. This opposite NAO polarity seems due to the southward shift of the Gulf Stream duringAMOCintensification, displacing the maximum baroclinicity southward near the jet exit. As the mode has somewhat different patterns when using SST, the wintertime impact of theAMOClacks robustness in this regime. However, none of the signals compares well with the observed influence of North Atlantic SST anomalies on the NAO because SST is dominated in CCSM3 by the meridional shifts of the Gulf Stream/North Atlantic Current that covary with the AMOC. Hence, although there is some potential climate predictability in CCSM3, it is not realistic. © 2013 American Meteorological Society. |
| 资助项目: | NOAA, 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/51472
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | LOCEAN, University Pierre and Marie Curie, Paris, France; Woods Hole Oceanographic Institution, Woods Hole, MA, United States
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| Recommended Citation: | |
Frankignoul C.,Gastineau G.,Kwon Y.-O.. The influence of the amoc variability on the atmosphere in CCSM3[J]. Journal of Climate,2013-01-01,26(24)
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