DOI: 10.1038/NGEO2424
论文题名: Stratospheric influence on tropospheric jet streams, storm tracks and surface weather
作者: Kidston J. ; Scaife A.A. ; Hardiman S.C. ; Mitchell D.M. ; Butchart N. ; Baldwin M.P. ; Gray L.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 6 起始页码: 433
结束页码: 440
语种: 英语
Scopus关键词: climate change
; diurnal variation
; jet stream
; low temperature
; storm track
; stratosphere-troposphere interaction
; weather forecasting
; westerly
; Europe
; United States
英文摘要: A powerful influence on the weather that we experience on the ground can be exerted by the stratosphere. This highly stratified layer of Earth's atmosphere is found 10 to 50 kilometres above the surface and therefore above the weather systems that develop in the troposphere, the lowest layer of the atmosphere. The troposphere is dynamically coupled to fluctuations in the speed of the circumpolar westerly jet that forms in the winter stratosphere: a strengthening circumpolar jet causes a poleward shift in the storm tracks and tropospheric jet stream, whereas a weakening jet causes a shift towards the equator. Following a weakening of the stratospheric jet, impacts on the surface weather include a higher likelihood of extremely low temperature over northern Europe and the eastern USA. Eddy feedbacks in the troposphere amplify the surface impacts, but the mechanisms underlying these dynamics are not fully understood. The same dynamical relationships act at very different timescales, ranging from daily variations to longer-term climate trends, suggesting a single unifying mechanism across timescales. Ultimately, an improved understanding of the dynamical links between the stratosphere and troposphere is expected to lead to improved confidence in both long-range weather forecasts and climate change projections. © 2015 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106180
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: 15 Canning Crescent, Oxford, United Kingdom; Met Office Hadley Centre, Met Office, FitzRoy Road, Exeter, United Kingdom; Department of Physics, University of Oxford, Parks Road, Oxford, United Kingdom; University of Exeter, Harrison Building, North Park Road, Exeter, United Kingdom
Recommended Citation:
Kidston J.,Scaife A.A.,Hardiman S.C.,et al. Stratospheric influence on tropospheric jet streams, storm tracks and surface weather[J]. Nature Geoscience,2015-01-01,8(6)