DOI: 10.1002/2015GL063676
论文题名: Comparison of the mass circulation and AO indices as indicators of cold air outbreaks in northern winter
作者: Yu Y. ; Ren R. ; Cai M.
刊名: Geophysical Research Letters
ISSN: 0094-8807
EISSN: 1944-8538
出版年: 2015
卷: 42, 期: 7 起始页码: 2442
结束页码: 2448
语种: 英语
英文关键词: Arctic Oscillation
; cold air outbreaks
; meridional mass circulation
Scopus关键词: Geophysics
; Arctic Oscillation
; Arctic oscillations
; Arctic regions
; Cold air outbreak
; Era interims
; Midlatitudes
; Negative phase
; Temporal change
; Earth sciences
; cold air
; mass transfer
; meridional circulation
; temporal variation
; winter
; Arctic Ocean
英文摘要: Using the daily ERA-Interim reanalysis data set for the 32 winters in 1979-2011, we find that midlatitude cold air outbreaks (CAOs) tend to preferentially occur within a week after simultaneously stronger mass circulations into the Arctic region in upper levels and out of the Arctic region below. The relationship of CAOs with Arctic Oscillation (AO) is less robust because temporal changes of AO are resulted from a small imbalance between the poleward and equatorward branches of the mass circulation. Results indicate that only when the poleward branch leads the equatorward branch (44% of all cases), CAOs tend to take place within a week after a negative phase of AO, whereas when the equatorward branch leads (19%), CAOs tend to occur after a positive phase of AO. In the remaining cases when the two branches are almost in phase, CAOs can be observed during either negative (24%) or positive (13%) phase of AO. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928705436&doi=10.1002%2f2015GL063676&partnerID=40&md5=a6345476cbaf28e6d2fab046906aaa57
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8423
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yu Y.,Ren R.,Cai M.. Comparison of the mass circulation and AO indices as indicators of cold air outbreaks in northern winter[J]. Geophysical Research Letters,2015-01-01,42(7).