DOI: 10.1002/2016JD025358
论文题名: Poleward transport variability in the Northern Hemisphere during final stratospheric warmings simulated by CESM(WACCM)
作者: Thiéblemont R. ; Matthes K. ; Orsolini Y.J. ; Hauchecorne A. ; Huret N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 18 起始页码: 10394
结束页码: 10410
语种: 英语
英文关键词: chemistry climate model
; frozen-in anticyclones
; quasi-biennial oscillation
; stratospheric final warming
; stratospheric sudden warmings
Scopus关键词: air mass
; annual variation
; atmospheric circulation
; atmospheric dynamics
; atmospheric transport
; climate modeling
; Northern Hemisphere
; planetary wave
; quasi-biennial oscillation
; stratosphere
; sudden stratospheric warming
; warming
; winter
; Arctic
英文摘要: Observational studies of Arctic stratospheric final warmings have shown that tropical/subtropical air masses can be advected to high latitudes and remain confined within a long-lived “frozen-in” anticyclone (FrIAC) for several months. It was suggested that the frequency of FrIACs may have increased since 2000 and that their interannual variability may be modulated by (i) the occurrence of major stratospheric warmings (mSSWs) in the preceding winter and (ii) the phase of the quasi-biennial oscillation (QBO). In this study, we tested these observational-based hypotheses for the first time using a chemistry climate model. Three 145 year sensitivity experiments were performed with the National Center of Atmospheric Research's Community Earth System Model (CESM): one control experiment including only natural variability, one with an extreme greenhouse gas emission scenario, and one without the QBO in the tropical stratosphere. In comparison with reanalysis, the model simulates a realistic frequency and characteristics of FrIACs, which occur under an abrupt and early winter-to-summer stratospheric circulation transition, driven by enhanced planetary wave activity. Furthermore, the model results support the suggestion that the development of FrIACs is favored by an easterly QBO in the middle stratosphere and by the absence of mSSWs during the preceding winter. The lower stratospheric persistence of background dynamical state anomalies induced by deep mSSWs leads to less favorable conditions for planetary waves to enter the high-latitude stratosphere in April, which in turn decreases the probability of FrIAC development. Our model results do not suggest that climate change conditions (RCP8.5 scenario) influence FrIAC occurrences. ©2016. 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/62837
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: GEOMAR-Helmholtz Centre for Ocean Research, Kiel, Germany; Now at Laboratoire Atmosphères, Milieux, Observations Spatiales-IPSL, CNRS, Paris, France; Faculty of Mathematics and Natural Science, Christian-Albrechts-Universität zu Kiel, Kiel, Germany; Norwegian Institute for Air Research, Kjeller, Norway; Laboratoire Atmosphères, Milieux, Observations Spatiales-IPSL, CNRS, Guyancourt, France; Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, CNRS, Orléans, France; U. F. R. Sciences, Université d'Orléans, Orléans, France
Recommended Citation:
Thiéblemont R.,Matthes K.,Orsolini Y.J.,et al. Poleward transport variability in the Northern Hemisphere during final stratospheric warmings simulated by CESM(WACCM)[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(18)