DOI: 10.1002/jgrd.50584
论文题名: Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies
作者: Rinke A. ; Dethloff K. ; Dorn W. ; Handorf D. ; Moore J.C.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 14 起始页码: 7698
结束页码: 7714
语种: 英语
英文关键词: Arctic atmosphere
; atmosphere-ice interaction
; regional climate modeling
Scopus关键词: Feedback
; Moisture
; Oscillating flow
; Arctic atmosphere
; atmosphere-ice interaction
; Atmospheric conditions
; Atmospheric feedbacks
; Feedback mechanisms
; Large-scale circulation
; Regional climate modeling
; Tropospheric moisture
; Sea ice
; air-sea interaction
; Arctic Oscillation
; atmospheric circulation
; climate modeling
; numerical model
; sea ice
; temperature effect
; Arctic Ocean
; Beaufort Sea
英文摘要: The coupled regional climate model HIRHAM-NAOSIM is used to investigate feedbacks between September sea ice anomalies in the Arctic and atmospheric conditions in autumn and the subsequent winter. A six-member ensemble of simulations spanning the period 1949-2008 is analyzed. The results show that negative Arctic sea ice anomalies are associated with increased heat and moisture fluxes, decreased static stability, increased lower tropospheric moisture, and modified baroclinicity, synoptic activity, and atmospheric large-scale circulation. The circulation changes in the following winter display meridionalized flow but are not fully characteristic of a negative Arctic Oscillation pattern, though they do support cold winter temperatures in northern Eurasia. Internally generated climate variability causes significant uncertainty in the simulated circulation changes due to sea ice-atmosphere interactions. The simulated atmospheric feedback patterns depend strongly on the position and strength of the regional sea ice anomalies and on the analyzed time period. The strongest atmospheric feedbacks are related to sea ice anomalies in the Beaufort Sea. This work suggests that there are complex feedback mechanisms that support a statistical link between reduced September sea ice and Arctic winter circulation. However, the feedbacks depend on regional and decadal variations in the coupled atmosphere-ocean-sea ice system. Key Points Coupled regional model simulates Arctic feedbacks Summer sea ice anomalies affect atmospheric winter circulation Atmospheric feedback patterns depend on the regional sea ice anomaly ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41076125
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63517
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: College of Global Change and Earth System Science, Beijing Normal University, 19 Xinjiekou Wai St., Beijing 100875, China; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
Recommended Citation:
Rinke A.,Dethloff K.,Dorn W.,et al. Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(14)