摘要
利用Micpas实况数据、NCEP 1°×1°再分析资料以及雷达资料对2014年5月8日和11日广东连续2次暴雨过程作了对比分析,结果表明:2次暴雨过程在形势上均与南支槽东移和低空急流密切相关,但高层辐散形成的机制不同;2次暴雨过程在水汽输送和不稳定层结等因素上表现出不同的特点;在雷达资料方面,8日过程珠三角附近"逆风区"的存在使回波增强并维持,风向的辐合作用较明显;而11日的暴雨则表现为西南风风速的辐合。
Using Micaps observations, NCEP 1°×1°reanalysis and radar data, we compared and analyzed two heavy rains that happened consecutively in Guangdong province on May 8 and 11, 2014. The result is shown as follows. The two heavy rains were closely related with the eastward movement of a southern branch of the westerlies and low-level jet streams, but with different formation mechanisms for high-level divergence. The two rain processes differ in the factors of water vapor transport and instable stratification ： the May 8 rain was with a ＂headwind＂ zone over the Pearl River Delta that intensified and maintained the echo, with significant convergence of wind direction, and the May 11 rain was with the convergence of southwesterly wind speed, as reflected in radar data.
出处
《广东气象》
2016年第2期1-5,共5页
Guangdong Meteorology
基金
中山市气象局科学技术研究项目<城市化对中山市高
低温天气影响的数值模拟研究>
关键词
天气学
暴雨形势
雷达特征
广东
climatology
patterns of heavy rain
radar echo characteristics
Guangdong
