[Objective] The aim was to analyze the causes of '6.06' heavy rainstorm in Wangmo County in Qianxinan.[Method] By dint of NCEP/NCAR 1°×1° reanalysis data,FY-2E TBB data,seven ground elements and...[Objective] The aim was to analyze the causes of '6.06' heavy rainstorm in Wangmo County in Qianxinan.[Method] By dint of NCEP/NCAR 1°×1° reanalysis data,FY-2E TBB data,seven ground elements and two elements from automatic station data,the main influential system and all kinds of physical quantity field features of heavy rainstorm in upper reaches of Wangmo County in Qianxinan from the evening on 5 June to 08:00 on 6 June in 2011 were studied.[Result] The rainstorm was the result of cold air,which was provided by 850 hPa cold shear line and ground radiation line,and warm and wet airstream on the northwest edge of subtropical high.MCS was the main reason for such heavy rainstorm.Southwest warm and wet airstream in middle lower part provided sufficient water vapor for the rainstorm.The 850 hPa water vapor flux divergence center moved from north to south along ground convergence line to Qianxinan.Rainfall location and water vapor flux as well as convergence center were corresponding.The rainfall intensity also was consistent with the amount of water vapor flux and water vapor convergence.[Conclusion] The study provided reference for the report of heavy rainstorm.展开更多
文摘该文利用望谟县站逐小时降水量、MICAPS资料,对近5 a(2010—2014年)望谟短时强降水特征及暴雨主要影响系统进行分析,结果表明:1近5 a望谟16次暴雨天气过程中,春季暴雨及秋季暴雨的平均雨强明显小于夏季;短时强降水逐月变化呈现明显的单峰型结构,6月是短时强降水最频繁发生的月份;短时强降水日变化呈三峰型结构,夜间是强降水集中发生时间,09—20时是强降水不发生时段。2高空槽和切变线是影响望谟暴雨的主要系统;地面上的系统多为辐合线、冷锋或静止锋;冷空气的入侵一般发生在春末夏初及秋季;低空急流的建立多出现在盛夏;南支槽影响望谟暴雨的时间主要为5月。3夏季暴雨的比湿条件及水汽通量好于春末,但是水汽辐合的强度没有春末强,秋季暴雨的比湿条件及水汽通量条件更差,但是850 h Pa的水汽通量散度较好;秋季及春末暴雨发生时上升运动更为剧烈;春末和夏季大气层结最为不稳定。4对流云系主要源地位于贵州西部—云南东部富源、罗平一线,有7次对流云系的源地为六盘水,3次为毕节,3次为黔西南州内;云系的移动路径基本为东南路径或偏南路径;有6次为典型MCS,4次为分散对流云系;16次过程中有10次有其它对流云系的合并加入。
文摘[Objective] The aim was to analyze the causes of '6.06' heavy rainstorm in Wangmo County in Qianxinan.[Method] By dint of NCEP/NCAR 1°×1° reanalysis data,FY-2E TBB data,seven ground elements and two elements from automatic station data,the main influential system and all kinds of physical quantity field features of heavy rainstorm in upper reaches of Wangmo County in Qianxinan from the evening on 5 June to 08:00 on 6 June in 2011 were studied.[Result] The rainstorm was the result of cold air,which was provided by 850 hPa cold shear line and ground radiation line,and warm and wet airstream on the northwest edge of subtropical high.MCS was the main reason for such heavy rainstorm.Southwest warm and wet airstream in middle lower part provided sufficient water vapor for the rainstorm.The 850 hPa water vapor flux divergence center moved from north to south along ground convergence line to Qianxinan.Rainfall location and water vapor flux as well as convergence center were corresponding.The rainfall intensity also was consistent with the amount of water vapor flux and water vapor convergence.[Conclusion] The study provided reference for the report of heavy rainstorm.
基金贵州省创新平台建设类项目(黔科合平台人才[2020]2103号)贵州省农科院青年基金(黔农科院青年基金[2017]10号)+2 种基金贵州省科技厅科技支撑项目(黔科合支撑[2020]1 Y 009号)省科技厅科技支撑项目(黔科合支源[2019]2251号)贵州省科技厅科技支撑项目(黔科合支撑[2019]2254号)。
