Northern Hemisphere Rossby Wave Initiation Events on the Extratropical Jet—A Climatological Analysis
Northern Hemisphere Rossby Wave Initiation Events on the Extratropical Jet—A Climatological Analysis
复制标题
北半球温带急流罗斯贝波起始事件——气候学分析
DOI：
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
H. Wernli
中科院分区：
文献类型：
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作者：
M. Röthlisberger;O. Martius;H. Wernli
本文利用ERA-Interim再分析资料，应用一种客观的Rossby波起始（RWI）识别算法，编制了北方半球中纬度急流上RWI事件的气候学资料。在冬季，RWI事件最频繁地发生在西北太平洋，而在北大西洋较少。对冬季北太平洋RWI事件前后大尺度气流的合成分析表明，在RWI事件发生之前，北极波导上有一个上游波列在亚洲传播，而在冬季RWI事件发生之后，北极波导上有一个上游波列在亚洲传播。合成波形成在一个相对较弱的纬向急流条纹，表现出斜压结构，并强烈放大的潜热释放在温暖的输送带加深的地面气旋。此外，波浪形成在一个区域的大规模上层变形，上游的一个预先存在的山脊。此外，活跃的热带对流影响的长期…
AbstractA climatology of Rossby wave initiation (RWI) events on the Northern Hemisphere mid-latitude jet is compiled by applying an objective RWI identification algorithm to the ERA-Interim re-analysis dataset. In winter, RWI events occur most frequently over the Northwestern Pacific and less often over the North Atlantic. In summer, the total number of RWI events is lower than in winter and the North Pacific RWI region shifts towards the Tibetan Plateau.Composite analysis of the large-scale flow prior to, during and after winter North Pacific RWI events shows an upstream wave train propagating across Asia on the Arctic waveguide prior to RWI. The composite wave forms on a relatively weak zonal jet streak, exhibits a baroclinic structure and is strongly amplified by latent heat release in the warm conveyor belt of a deepening surface cyclone. Moreover, the wave forms in a region of large-scale upper-level deformation, upstream of a pre-existing ridge. Further, active tropical convection affects the longit...
影响因子：
8.9
作者：
C. Grams;H. Wernli;M. Böttcher;J. Čampa;U. Corsmeier;S. Jones;J. Keller;C. Lenz;L. Wiegand-
通讯作者：
C. Grams;H. Wernli;M. Böttcher;J. Čampa;U. Corsmeier;S. Jones;J. Keller;C. Lenz;L. Wiegand-
DOI：
10.5351/csam.2015.22.6.665
发表时间：
2015-11
影响因子：
0.4
作者：
Kim S
通讯作者：
Kim S