DOI: 10.1007/s00382-012-1622-7
Scopus记录号: 2-s2.0-84881023677
论文题名: The role of precipitation in aerosol-induced changes in northern hemisphere wintertime stationary waves
作者: Lewinschal A. ; Ekman A.M.L. ; Körnich H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-03-04 起始页码: 647
结束页码: 661
语种: 英语
英文关键词: Aerosol
; Convective precipitation
; EC-Earth
; Stationary waves
英文摘要: The coupled climate model EC-Earth2 is used to investigate the impact of direct radiative effects of aerosols on stationary waves in the northern hemisphere wintertime circulation. The direct effect of aerosols is simulated by introducing prescribed mixing ratios of different aerosol compounds representing pre-industrial and present-day conditions, no indirect effects are included. In the EC-Earth2 results, the surface temperature response is uncorrelated with the highly asymmetric aerosol radiative forcing pattern. Instead, the anomalous extratropical temperature field bears a strong resemblance to the aerosol-induced changes in the stationary-wave pattern. It is demonstrated that the main features of the wave pattern of EC-Earth2 can be replicated by a linear, baroclinic model forced with latent heat changes corresponding to the anomalous convective precipitation generated by EC-Earth2. The tropical latent heat release is an effective means of generating stationary wave trains that propagate into the extratropics. Hence, the results of the present study indicate that aerosol-induced convective precipitation anomalies govern the extratropical wave-field changes, and that the far-field temperature response dominates over local effects of aerosol radiative forcing. © 2012 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54845
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology, Stockholm University, Stockholm, Sweden; Swedish Meteorological and Hydrological Institute, Norrköping, Sweden
Recommended Citation:
Lewinschal A.,Ekman A.M.L.,Körnich H.. The role of precipitation in aerosol-induced changes in northern hemisphere wintertime stationary waves[J]. Climate Dynamics,2013-01-01,41(2017-03-04)