DOI: 10.1007/s00382-013-1950-2
Scopus记录号: 2-s2.0-84899656664
论文题名: Role for Eurasian Arctic shelf sea ice in a secularly varying hemispheric climate signal during the 20th century
作者: Wyatt M.G. ; Curry J.A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-09-10 起始页码: 2763
结束页码: 2782
语种: 英语
英文关键词: Arctic sea ice
; Climate regime
; Multidecadal variability
; Synchronized network
英文摘要: A hypothesized low-frequency climate signal propagating across the Northern Hemisphere through a network of synchronized climate indices was identified in previous analyses of instrumental and proxy data. The tempo of signal propagation is rationalized in terms of the multidecadal component of Atlantic Ocean variability-the Atlantic Multidecadal Oscillation. Through multivariate statistical analysis of an expanded database, we further investigate this hypothesized signal to elucidate propagation dynamics. The Eurasian Arctic Shelf-Sea Region, where sea ice is uniquely exposed to open ocean in the Northern Hemisphere, emerges as a strong contender for generating and sustaining propagation of the hemispheric signal. Ocean-ice-atmosphere coupling spawns a sequence of positive and negative feedbacks that convey persistence and quasi-oscillatory features to the signal. Further stabilizing the system are anomalies of co-varying Pacific-centered atmospheric circulations. Indirectly related to dynamics in the Eurasian Arctic, these anomalies appear to negatively feed back onto the Atlantic's freshwater balance. Earth's rotational rate and other proxies encode traces of this signal as it makes its way across the Northern Hemisphere. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: DOE, U.S. Department of Energy
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54369
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Geologic Sciences, CIRES/INSTAAR, Benson Earth Sciences Building, University of Colorado-Boulder, Boulder, CO, 80309, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
Recommended Citation:
Wyatt M.G.,Curry J.A.. Role for Eurasian Arctic shelf sea ice in a secularly varying hemispheric climate signal during the 20th century[J]. Climate Dynamics,2014-01-01,42(2017-09-10)