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 ~ x 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 com- plex. 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 lar- gest strong rise in height less than in 2014.
出处
《贵州气象》
2016年第6期48-53,共6页
Journal of Guizhou Meteorology
基金
国家自然科学基金重点项目(青藏高原东南缘复杂山地地气相互作用特征及其对区域水热过程的影响机制)资助(项目号:91537212)
关键词
强降雨
环流形势
水汽条件
垂直速度
first heavy rainfall
atmospheric circulation
water vapor condition
vertical velocity
