DOI: 10.1175/JCLI-D-15-0902.1
Scopus记录号: 2-s2.0-84993968465
论文题名: Investigating possible arctic-midlatitude teleconnections in a linear framework
作者: Sellevold R. ; Sobolowski S. ; Li C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 20 起始页码: 7329
结束页码: 7343
语种: 英语
Scopus关键词: Climate change
; Climatology
; Meteorology
; Sea ice
; Troposphere
; Atmospheric circulation
; Climate variability
; Forcing
; Interannual variability
; Stationary waves
; Teleconnections
; Variability
; Fighter aircraft
; annual variation
; atmospheric circulation
; atmospheric dynamics
; atmospheric forcing
; climate variation
; sea ice
; standing wave
; teleconnection
; troposphere
; warming
; Arctic
英文摘要: There is an ongoing debate over whether accelerated Arctic warming [Arctic amplification (AA)] is altering the large-scale circulation responsible for the anomalous weather experienced by midlatitude regions in recent years. Among the proposed mechanisms is the idea that local processes associated with sea ice loss heat the lower troposphere at high latitudes, thus weakening the equator-to-pole temperature gradient and driving changes in quasi-stationary waves, the midlatitude jets, and storm tracks. It is further hypothesized that these circulation changes are conducive to persistent weather patterns. Because of the short observational record and large atmospheric internal variability, it is difficult to identify robust relationships and infer causality. Here, a simplified, linear, steady-state model is used to investigate the direct response of the midlatitude atmospheric circulation to thermal forcing in the Arctic. The results suggest that there is a weak midlatitude circulation response to an idealized, but representative, Arctic heating perturbation. Further, the stationary wave responses are shown to be well within the bounds of internal variability. A midlatitude response is excited if the idealized heating penetrates up to the tropopause. Such deep, persistent heating is not observed on average during the AA period but does suggest a pathway for Arctic-midlatitude linkages under specific conditions. This study adds to the growing body of work suggesting that warming in the lower troposphere associated with Arctic amplification is not currently a direct driver of anomalous midlatitude circulation changes. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50319
Appears in Collections: 气候变化事实与影响
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作者单位: Geophysical Institute, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; Uni Research Climate, Bergen, Norway
Recommended Citation:
Sellevold R.,Sobolowski S.,Li C.. Investigating possible arctic-midlatitude teleconnections in a linear framework[J]. Journal of Climate,2016-01-01,29(20)