Diagnostic analysis between the heavy rainfall and the potential vorticity and dry intrusion in the Yangtze River in 2011(2011年长江中下游暴雨发展与位涡、干侵入的诊断分析)
基于NCEP的FNL资料,对2011年6月18~19日长江中下游出现的一轮暴雨过程进行分析,发现本轮暴雨过程分别与对流不稳定层结和地面气旋发展有关.应用位涡理论进行诊断,结果显示,大气湿斜压发展,MPV1 负中心下滑触发中低层不稳定层结,产生对流不稳定强降水,实况强降雨区与低层850 hPa MPV1负中心对应较好.低层锋区冷空气下滑,气旋发展,遇地形作用,暴雨增幅.高层位涡增强东移,引导低层位涡越山发展;高层干空气南下侵入中低层气旋上空,转为上升气流,一方面增强了低空气旋的发展,使不稳定降水增加;另一方面,产生的次级环流又使气旋发展持续,从而强降水维持....
Main Authors: | LUChenli(陆琛莉), HUAKeliang(华克亮), PANShixiong(潘士雄), HEBin(何斌) |
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Format: | Article |
Language: | zho |
Published: |
Zhejiang University Press
2014-12-01
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Series: | Zhejiang Daxue xuebao. Lixue ban |
Subjects: | |
Online Access: | https://doi.org/10.3785/j.issn.1008-9497.2014.Supp.005 |
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