Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027222 |
On the Dynamics of Austral Heat Waves | |
Risbey, James S.1; 39;Kane, Terence J.2 | |
2018-01-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:1页码:38-57 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Germany; Switzerland |
英文摘要 | This work examines summer heat wave events in four different regions of Australia (southwest, central, southeast, and northeast) to assess similarities and differences in the circulations that precede, accompany, and follow the heat wave events. A series of circulation composites are constructed for days from 10 days prior to 5 days following onset of each heat wave event. The composites of geopotential height anomalies and wave activity flux vectors show that heat waves in southwest and southeast Australia are preceded by coherent wave train structures in the Indian Ocean region, accompanied by blocking in the Australian region (as an amplified node of the wave train structure), and followed by coherent responses of wave train patterns in the Pacific and South America regions. The heat wave blocking high is maintained by convergence of wave activity in a well-defined wave channel. The concentration of wave activity in the block is aided by the formation of a subtropical jet branch and wave barrier on the equatorward side of the block. Heat waves in central and northeast Australia show similar wave train life cycle responses, but with a proximate ridge in the midtroposphere and a trough in the nearby waveguide region. Heat waves in Australia can be viewed as an element of successive expression of the planetary waveguide modes in the Southern Hemisphere and serve as signifiers of organized, active phases of these modes. |
英文关键词 | heat wave circulation waveguide blocking |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423433500003 |
WOS关键词 | STATIONARY ROSSBY WAVES ; VARYING BASIC FLOW ; SOUTHERN-HEMISPHERE ; NORTHERN-HEMISPHERE ; SOUTHEASTERN AUSTRALIA ; CLUSTER-ANALYSIS ; ACTIVITY FLUX ; TIME-SERIES ; BLOCKING ; PACIFIC |
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/32711 |
专题 | 气候变化 |
作者单位 | 1.CSIRO Oceans & Atmosphere, Hobart, Tas, Australia; 2.Univ Hamburg, Hamburg, Germany; 3.Univ Svizzera Italiana, Lugano, Switzerland |
推荐引用方式 GB/T 7714 | Risbey, James S.,39;Kane, Terence J.. On the Dynamics of Austral Heat Waves[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(1):38-57. |
APA | Risbey, James S.,&39;Kane, Terence J..(2018).On the Dynamics of Austral Heat Waves.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(1),38-57. |
MLA | Risbey, James S.,et al."On the Dynamics of Austral Heat Waves".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.1(2018):38-57. |
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