GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-18-0099.1
The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions
DallaSanta, Kevin1; Gerber, Edwin P.1; Toohey, Matthew2
2019-02-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2019
卷号32期号:4页码:1101-1120
文章类型Article
语种英语
国家USA; Germany
英文摘要

Proxy data and observations suggest that large tropical volcanic eruptions induce a poleward shift of the North Atlantic jet stream in boreal winter. However, there is far from universal agreement in models on this effect and its mechanism, and the possibilities of a corresponding jet shift in the Southern Hemisphere or the summer season have received little attention. Using a hierarchy of simplified atmospheric models, this study examines the impact of stratospheric aerosol on the extratropical circulation over the annual cycle. In particular, the models allow the separation of the dominant shortwave (surface cooling) and longwave (stratospheric warming) impacts of volcanic aerosol. It is found that stratospheric warming shifts the jet poleward in both the summer and winter hemispheres. The experiments cannot definitively rule out the role of surface cooling, but they provide no evidence that it shifts the jet poleward. Further study with simplified models demonstrates that the response to stratospheric warming is remarkably generic and does not depend critically on the boundary conditions (e.g., the planetary wave forcing) or the atmospheric physics (e.g., the treatment of radiative transfer and moist processes). It does, however, fundamentally involve both zonal-mean and eddy circulation feedbacks. The time scales, seasonality, and structure of the response provide further insight into the mechanism, as well as its connection to modes of intrinsic natural variability. These findings have implications for the interpretation of comprehensive model studies and for postvolcanic prediction.


英文关键词Atmosphere Volcanoes Empirical orthogonal functions General circulation models
领域气候变化
收录类别SCI-E
WOS记录号WOS:000457325500002
WOS关键词QUASI-BIENNIAL OSCILLATION ; RELATIVELY SIMPLE AGCM ; NORTHERN-HEMISPHERE ; CLIMATE MODEL ; POLAR VORTEX ; PART I ; PINATUBO ERUPTION ; OZONE DEPLETION ; STORM TRACKS ; SEA-ICE
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20943
专题气候变化
作者单位1.NYU, Courant Inst Math Sci, Ctr Atmosphere Ocean Sci, New York, NY 10003 USA;
2.GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany
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DallaSanta, Kevin,Gerber, Edwin P.,Toohey, Matthew. The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions[J]. JOURNAL OF CLIMATE,2019,32(4):1101-1120.
APA DallaSanta, Kevin,Gerber, Edwin P.,&Toohey, Matthew.(2019).The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions.JOURNAL OF CLIMATE,32(4),1101-1120.
MLA DallaSanta, Kevin,et al."The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions".JOURNAL OF CLIMATE 32.4(2019):1101-1120.
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