摘要
利用NCEP再分析资料、常规高空及地面常规资料、自动站资料,对2010年8月13日和2011年7月3日阿坝州东南部特大暴雨形成机制以及产生泥石流情况进行了探讨。结果表明:两次强降水天气过程发生在不同的环流背景下,但与副高位置、高原槽、地面冷空气等因素密切相关。两次过程强降水落区都为高空辐散、低空辐合区,且该地区存在强的上升运动,水汽辐合明显。从湿位涡分析得出,强降水区域一般会出现在对流层中下部MPV1负值中心和低层MPV2正值中心的范围内。
Using the NCEP reanalysis data, conventional aerial and ground conventional data, automatic weather station data, the August 13th, 2010 and July 3rd, 2011 Aba southeast rainstorm and debris flow are discussed. The results show that： two strong precipitation weather process occurred in different circulation background, but with the position of subtropical high, plateau trough, cold air and other factors closely related to the ground. The two process of heavy precipitation area for upper - level divergence, low - level convergence zone, and the region has a strong upward motion, water vapor convergence obviously. From the moist potential vorticity analysis, strong precipitation area generally occur in the troposphere and lower negative center of MPV1 and lower MPV2 positive center of range.
出处
《高原山地气象研究》
2013年第4期61-68,共8页
Plateau and Mountain Meteorology Research
关键词
泥石流
副高
特大暴雨
debris flow, subtropical high, torrential rain
