DOI: 10.1175/JCLI-D-15-0723.1
Scopus记录号: 2-s2.0-84977550085
论文题名: Seasonal sensitivity of the eddy-driven jet to tropospheric heating in an idealized AGCM
作者: McGraw M.C. ; Barnes E.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 14 起始页码: 5223
结束页码: 5240
语种: 英语
Scopus关键词: Climate models
; Climatology
; Dynamics
; Meteorology
; Tropics
; Troposphere
; Atmospheric circulation
; Forcing
; Primitive equations models
; Seasonal variability
; Variability
; Climate change
; atmospheric circulation
; atmospheric dynamics
; atmospheric forcing
; atmospheric general circulation model
; climate change
; climatology
; heating
; jet flow
; meteorology
; seasonal variation
; sensitivity analysis
; troposphere
英文摘要: A dry dynamical core is used to investigate the seasonal sensitivity of the circulation to two idealized thermal forcings: A tropical upper-tropospheric heating and a polar lower-tropospheric heating. The thermal forcings are held constant, and the response of the circulation in each month of the year is explored. First, the circulation responses to tropical warming and polar warming are studied separately, and then the response to the simultaneously applied forcings is analyzed. Finally, the seasonality of the internal variability of the circulation is explored as a possible mechanism to explain the seasonality of the responses. The primary results of these experiments are as follows: 1) There is a seasonal sensitivity in the circulation response to both the tropical and polar forcings. 2) The jet position response to each forcing is greatest in the transition seasons, and the jet speed response exhibits a seasonal sensitivity to both forcings, although the seasonal sensitivities are not the same. 3) The circulation response is nonlinear in the transition seasons, but approximately linear in the winter months. 4) The internal variability of the unforced circulation exhibits a seasonal sensitivity that may partly explain the seasonal sensitivity of the forced response. The seasonality of the internal variability of daily MERRA reanalysis data is compared to that of the model, demonstrating that the broad conclusions drawn from this idealized modeling study may be useful for understanding the jet response to anthropogenic forcing. © 2016 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50355
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
McGraw M.C.,Barnes E.A.. Seasonal sensitivity of the eddy-driven jet to tropospheric heating in an idealized AGCM[J]. Journal of Climate,2016-01-01,29(14)