DOI: 10.1002/jgrd.50156
论文题名: A climatology of frozen-in anticyclones in the spring arctic stratosphere over the period 1960-2011
作者: Thiéblemont R. ; Orsolini Y.J. ; Hauchecorne A. ; Drouin M.-A. ; Huret N.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1299
结束页码: 1311
语种: 英语
英文关键词: Climatology
; Frozen-In Anticyclones
; Stratosphere
; Transport
; Tropics/Poles Couplings
Scopus关键词: Climatology
; Couplings
; Upper atmosphere
; Characteristic size
; Contour models
; Frozen-In Anticyclones
; High resolution
; Large heat flux
; Polar latitude
; Transport
; Wind reversals
; Atmospheric pressure
; anticyclone
; climate modeling
; climatology
; easterly wave
; spring (season)
; stratosphere
; vorticity
; Arctic Ocean
英文摘要: During springtime, following the stratospheric final warming, intrusions from low latitudes can become trapped at polar latitudes in long-lived anticyclones. Such "frozen-in" anticyclones (FrIACs) have occasionally been observed to persist as late as August, advected by summer easterlies.In this study, the high-resolution advection contour model MIMOSA is used to advect a pseudo-potential vorticity tracer. The model is driven by ERA-40 and the ERA-Interim reanalyses over the period 1960-2011. We first identify a remarkable FrIAC event in spring 2011. In addition, we developed a method to detect the characteristic size of low-latitude intrusions into the polar region at the time of the spring transition, over the period 1960-2011. Years are classified as either Type-A when the intrusions are small or as Type-B when intrusions are large, potentially evolving into FrIACs. For a FrIAC to occur, we require an additional criterion based on the in-phase character of the core of the intrusions and the anticyclone.During the 52 analyzed years, 9 events have been identified: 1 in the 1960s, 1 in the 1980s, 2 in the 1990s, and 5 from 2002. FrIAC are predominantly long-lived intrusions, which occur in association with abrupt and early reversal to summer easterlies with a large heat flux pulse around the date of this wind reversal. Finally, the results are discussed in a climatological context. Key PointsFrozen-In Anticyclones ClimatologyFrozen-In Anticyclones characterization and variabilityTropics/Poles Couplings ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63959
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: LPC2E-Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, CNRS, Université d'Orléans, 3A, Avenue de la Recherche scientifique, F-45071 Orléans, France; NILU-Norwegian Institute for Air Research, Kjeller, Norway; LATMOS-Laboratoire Atmosphères, Milieux, Observations Spatiales/CNRS, Quartier des Garennes, Guyancourt, France; OMP-Observatoire Midi-Pyrénnées/CNRS, Toulouse, France
Recommended Citation:
Thiéblemont R.,Orsolini Y.J.,Hauchecorne A.,et al. A climatology of frozen-in anticyclones in the spring arctic stratosphere over the period 1960-2011[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)