Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0221.1 |
Assessment of Conditional Symmetric Instability from Global Reanalysis Data | |
Chen, Ting-Chen; Yau, M. K.; Kirshbaum, Daniel J. | |
2018-07-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:7页码:2425-2443 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Slantwise convection, the process by which moist symmetric instability is released, has often been linked to banded clouds and precipitation, especially in frontal zones within extratropical cyclones. Studies also suggest that the latent heat release associated with slantwise convection can lead to a spinup of surface frontogenesis, which can enhance the rapid intensification of extratropical cyclones. However, most of these studies considered only local areas or short time durations. In this study, we provide a novel statistical investigation of the global climatology of the potential occurrence of slantwise convection, in terms of conditional symmetric instability, and its relationship with precipitating systems. Using the 6-hourly ERA-Interim, two different indices are calculated, namely, slantwise convective available potential energy (SCAPE) and vertically integrated extent of realizable symmetric instability (VRS), to assess the likelihood of occurrence of slantwise convection around the globe. The degree of association is quantified between these indices and the observed surface precipitation as well as the cyclone activity. The susceptibility of midlatitude cyclones to slantwise convection at different stages of their life cycle is also investigated. As compared to the nonexplosive cyclone cases, the time evolution of SCAPE and VRS within rapidly deepening cyclones exhibit higher values before, and a more significant drop after, the onset of rapid intensification, supporting the idea that the release of symmetric instability might contribute to the intensification of storms. |
英文关键词 | Baroclinic flows Conditional instability Convection Climatology Reanalysis data |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437725800002 |
WOS关键词 | SATURATION POTENTIAL VORTICITY ; SLANTWISE CONVECTION ; THERMAL STRATIFICATION ; BAROCLINIC STABILITY ; STORM TRACKS ; PRECIPITATION ; CLIMATOLOGY ; MODEL ; CYCLONES ; DYNAMICS |
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/29201 |
专题 | 地球科学 |
作者单位 | McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada |
推荐引用方式 GB/T 7714 | Chen, Ting-Chen,Yau, M. K.,Kirshbaum, Daniel J.. Assessment of Conditional Symmetric Instability from Global Reanalysis Data[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(7):2425-2443. |
APA | Chen, Ting-Chen,Yau, M. K.,&Kirshbaum, Daniel J..(2018).Assessment of Conditional Symmetric Instability from Global Reanalysis Data.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(7),2425-2443. |
MLA | Chen, Ting-Chen,et al."Assessment of Conditional Symmetric Instability from Global Reanalysis Data".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.7(2018):2425-2443. |
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