DOI: 10.1002/2014GL061638
论文题名: The response of midlatitude jets to increased CO<inf>2</inf>: Distinguishing the roles of sea surface temperature and direct radiative forcing
作者: Grise K.M. ; Polvani L.M.
刊名: Geophysical Research Letters
ISSN: 0094-9753
EISSN: 1944-9484
出版年: 2014
卷: 41, 期: 19 起始页码: 6863
结束页码: 6871
语种: 英语
英文关键词: atmospheric circulation
; climate change
; radiative forcing
; sea surface temperatures
Scopus关键词: Atmospheric radiation
; Atmospheric temperature
; Climate change
; Climate models
; Climatology
; Meteorology
; Oceanography
; Surface properties
; Atmospheric circulation
; Coupled Model Intercomparison Project
; Direct radiative forcing
; Extratropical circulation
; Northern hemisphere
; Radiative forcings
; Sea surface temperature (SST)
; Tropospheric circulation
; Carbon dioxide
; air-sea interaction
; carbon dioxide
; jet
; oceanic circulation
; radiative forcing
; sea surface temperature
; troposphere
英文摘要: In Coupled Model Intercomparison Project Phase 5 (CMIP5) models, the zonal-mean tropospheric circulation shifts robustly poleward in the Southern Hemisphere extratropics in response to increased atmospheric CO2 concentrations. However, in the Northern Hemisphere (NH) extratropics, the circulation response to CO2 is largely absent in the zonal mean and is instead characterized by complex regional anomalies. This study decomposes the atmospheric circulation response to CO2 forcing in CMIP5 models into two components: a direct component due to CO2 radiative forcing and an indirect component associated with sea surface temperature (SST)-mediated changes. The direct radiative forcing of CO2 drives a weak poleward jet shift in both hemispheres, whereas the indirect (SST) component of the CO2 forcing dominates the total response and drives a zonally asymmetric response in the NH. Hence, understanding the SST-mediated component of atmospheric CO2 forcing appears crucial to unlocking the mechanisms that contribute to forced extratropical circulation changes. Key Points NH circulation does not shift robustly poleward in response to increasing CO2 Direct radiative forcing of CO2 causes poleward jet shift in each hemisphereSSTs dominate and cause NH asymmetric extratropical circulation response ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911167174&doi=10.1002%2f2014GL061638&partnerID=40&md5=1cde0065663fdcfcee342c432dbedcff
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7017
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States
Recommended Citation:
Grise K.M.,Polvani L.M.. The response of midlatitude jets to increased CO<inf>2</inf>: Distinguishing the roles of sea surface temperature and direct radiative forcing[J]. Geophysical Research Letters,2014-01-01,41(19).