DOI: 10.1175/JCLI-D-18-0301.1
Scopus记录号: 2-s2.0-85061786953
论文题名: Revisiting the linkages between the variability of atmospheric circulations and arctic melt-season sea ice cover at multiple time scales
作者: Yu L. ; Zhong S. ; Zhou M. ; Lenschow D.H. ; Sun B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 5 起始页码: 1461
结束页码: 1482
语种: 英语
Scopus关键词: Advection
; Atmospheric pressure
; Climatology
; Conformal mapping
; Self organizing maps
; Atlantic multidecadal oscillations
; Atmospheric circulation
; Atmospheric circulation changes
; Long-wave radiation
; Multiple time scale
; North Atlantic oscillations
; Pacific decadal oscillation
; Surface air temperatures
; Sea ice
英文摘要: The sharp decline of Arctic sea ice in recent decades has captured the attention of the climate science community. A majority of climate analyses performed to date have used monthly or seasonal data. Here, however, we analyze daily sea ice data for 1979-2016 using the self-organizing map (SOM) method to further examine and quantify the contributions of atmospheric circulation changes to the melt-season Arctic sea ice variability. Our results reveal two main variability modes: the Pacific sector mode and the Barents and Kara Seas mode, which together explain about two-thirds of the melt-season Arctic sea ice variability and more than 40% of its trend for the study period. The change in the frequencies of the two modes appears to be associated with the phase shift of the Pacific decadal oscillation (PDO) and the Atlantic multidecadal oscillation (AMO). The PDO and AMO trigger anomalous atmospheric circulations, in particular, the Greenland high and the North Atlantic Oscillation and anomalous warm and cold air advections into the Arctic Ocean. The changes in surface air temperature, lower-atmosphere moisture, and downwelling longwave radiation associated with the advection are consistent with the melt-season sea ice anomalies observed in various regions of the Arctic Ocean. These results help better understand the predictability of Arctic sea ice on multiple (synoptic, intraseasonal, and interannual) time scales. © 2019, American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117199
Appears in Collections: 气候变化与战略
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Recommended Citation:
Yu L.,Zhong S.,Zhou M.,et al. Revisiting the linkages between the variability of atmospheric circulations and arctic melt-season sea ice cover at multiple time scales[J]. Journal of Climate,2019-01-01,32(5)