DOI: 10.1002/2016GL070309
论文题名: Sinuosity of midlatitude atmospheric flow in a warming world
作者: Cattiaux J. ; Peings Y. ; Saint-Martin D. ; Trou-Kechout N. ; Vavrus S.J.
刊名: Geophysical Research Letters
ISSN: 0094-8803
EISSN: 1944-8534
出版年: 2016
卷: 43, 期: 15 起始页码: 8259
结束页码: 8268
语种: 英语
英文关键词: Arctic amplification
; atmospheric dynamics
; climate change
; midlatitude circulation
; sinuosity
Scopus关键词: Atmospheric movements
; Global warming
; Poles
; Temperature
; Thermal gradients
; Atmospheric dynamics
; Atmospheric flows
; Internal variability
; Midlatitudes
; Model discrepancies
; Poleward shift
; Potential change
; Sinuosity
; Climate change
英文摘要: Global warming is expected to affect midlatitude atmospheric dynamics through changes in the equator-to-pole temperature gradient. While the latitudinal expansion of the tropics would induce both a poleward shift and reinforcement of the westerlies, Arctic changes might counterbalance this effect. Beyond position and speed, potential changes in the flow waviness are crucial for midlatitude weather. Here we investigate such changes through an intuitive metric characterizing the flow sinuosity at 50°N. We find that despite a slight increase in recent reanalyses, the midlatitude sinuosity is projected to decrease in response to climate change according to CMIP5 simulations. Recent trends could therefore result from internal variability or different timings of tropical and polar influences. Future uncertainties are dominated by model discrepancies and partially linked to the dispersion in the equator-to-pole temperature gradient response. Our results support the hypothesis that a faster westerly flow is expected to be less sinuous (and vice-versa). ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981505025&doi=10.1002%2f2016GL070309&partnerID=40&md5=cf92f8effbd1fd5beb511182f591a417
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9766
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: Centre National de Recherches Meteorologiques, CNRS/Meteo-FranceToulouse, France
Recommended Citation:
Cattiaux J.,Peings Y.,Saint-Martin D.,et al. Sinuosity of midlatitude atmospheric flow in a warming world[J]. Geophysical Research Letters,2016-01-01,43(15).