DOI: 10.1175/JCLI-D-16-0140.1
Scopus记录号: 2-s2.0-84996618846
论文题名: Impact of regional atmospheric cloud radiative changes on shifts of the extratropical jet stream in response to global warming
作者: Voigt A. ; Shaw T.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 23 起始页码: 8399
结束页码: 8421
语种: 英语
Scopus关键词: Atmospheric movements
; Atmospheric radiation
; Atmospheric temperature
; Climate change
; Clouds
; Fighter aircraft
; Global warming
; Jets
; Oceanography
; Surface waters
; Uncertainty analysis
; Atmospheric circulation
; Cloud radiative effects
; Model uncertainties
; Radiative forcings
; Radiative interactions
; Realistic simulation
; Sea surface temperatures
; Temperature changes
; Climate models
英文摘要: Climate models robustly project that global warming will lead to a poleward shift of the annual-mean zonal-mean extratropical jet streams. The magnitude of such shifts remains uncertain, however, and recent work has indicated a potentially important role of cloud radiative interactions. The model spread found in realistic simulations with interactive sea surface temperatures (SSTs) is captured in aquaplanet simulations with prescribed SSTs, because of which the latter setup is adapted here to study the impact of regional atmospheric cloud radiative changes on the jet position. Simulations with two CMIP5 models and prescribed regional cloud changes show that the rise of tropical high-level clouds and the upward and poleward movement of midlatitude high-level clouds lead to poleward jet shifts. High-latitude low-level cloud changes shift the jet poleward in one model but not in the other. The impact of clouds on the jet operates via the atmospheric radiative forcing that is created by the cloud changes and is qualitatively reproduced in a dry model, although the latter is too sensitive because of its simplified treatment of diabatic processes. The 10-model CMIP5 aquaplanet ensemble of global warming exhibits correlations between jet shifts, regional temperature changes, and regional cloud changes that are consistent with the prescribed cloud simulations. This provides evidence that the atmospheric radiative forcing from tropical and midlatitude high-level cloud changes contributes to model uncertainty in future jet shifts, in addition to the surface radiative forcing from extratropical cloud changes highlighted by previous studies. © 2016 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50123
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of the Geophysical Sciences, University of Chicago, Chicago, IL, United States
Recommended Citation:
Voigt A.,Shaw T.A.. Impact of regional atmospheric cloud radiative changes on shifts of the extratropical jet stream in response to global warming[J]. Journal of Climate,2016-01-01,29(23)