云南2013年和2014年的首场强降雨过程对比分析
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摘要
选取云南125个县气象观测站降水观测资料和NCEP(1°×1°)再分析资料,利用物理量诊断方法,对2013年和2014年云南首场强降雨过程的异同进行对比分析。结果表明:2013年首场强降雨过程具有时间短、范围小、强度弱的特点,而2014年首场强降雨过程具有时间长、范围广、强度强的特点。在环流形势上,2013年影响系统偏弱,2014年影响系统相对较复杂。在水汽通量和水汽辐合上,2013年的水汽比2014年的偏少。在垂直速度上,2013年首场强降雨过程中,上升区最大上升速度比2014年的偏大,但强对流上升区比2014年的浅薄。
Based on 125 Yunnan county- level station observed precipitation data as well as NCEP( 1° × 1°)re- analysis data,the methods of physical quantities diagnostics was used to contrastively analyze the similarities and differences between the first province- wide heavy rainfall processes in 2013—2014. The results show that,the first heavy rainfall process in 2013 lasted for a shorter duration with a weaker rain intensity and small rainfall areas.In the circulation situation,influence system of 2013 weaker,and the influence system of the 2014 were more complex. On the water vapor flux and water vapor convergence rate,2013 less than in 2014. From the point of vertical velocity,although the first heavy rainfall processes in 2013,the strong rainfall was faster than in 2014,but the largest strong rise in height less than in 2014.
Based on 125 Yunnan county- level station observed precipitation data as well as NCEP( 1° × 1°)re- analysis data,the methods of physical quantities diagnostics was used to contrastively analyze the similarities and differences between the first province- wide heavy rainfall processes in 2013—2014. The results show that,the first heavy rainfall process in 2013 lasted for a shorter duration with a weaker rain intensity and small rainfall areas.In the circulation situation,influence system of 2013 weaker,and the influence system of the 2014 were more complex. On the water vapor flux and water vapor convergence rate,2013 less than in 2014. From the point of vertical velocity,although the first heavy rainfall processes in 2013,the strong rainfall was faster than in 2014,but the largest strong rise in height less than in 2014.
引文
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[3]张丰启,崔晶,周淑玲,等.一次中纬度特大暴雨过程的中尺度分析[J],南京气象学院学报,2001,24(1):113-118.
[4]江虹.2003年淮河暴雨期大气水汽输送特征及成因分析[J].暴雨灾害,2007,26(2):118-124.
[5]东高红,解以扬,于莉莉.一次局地大暴雨的落区分析与预报[J].气象,2010,36(6):50-58.
[6]朱乾根,林锦瑞,寿绍文.天气学原理和方法[M].北京:气象出版社,2000.
[7]许美玲,段旭,张腾飞,等.低纬高原地区一次罕见大暴雨的中尺度数值模拟[J].高原气象,2006,25(2):268-276.
[8]牛法宝,马联翔,闵颖.“10.05.25”云南全省性强降水过程成因分析[J].云南气象,2010,30(2).
[9]张超,牛法宝.云南2013年首场全省性强降水过程的成因分析[J].云南气象,2013,33(4):22-27.