丽水市倒春寒特征及其成因分析

Characteristics of the Late Spring Coldness and Its Cause Analysis in Lishui

为减少倒春寒对农业生产的不利影响,采用统计诊断学的方法对丽水市7个测站自建站以来的倒春寒天气过程进行统计,总结了倒春寒的分布特征及类型。结果表明:空间分布上,西北部的遂昌倒春寒出现得最多,东南部的青田最少;时间分布上,每年4月上旬出现次数最多。类型上多为连续阴雨型。根据倒春寒危害程度指标,选取影响严重的年份,研究其发生前期的大气环流背景,发现某些冬季环流特征指数对于是否出现倒春寒有一定的指示作用。

Based on the meteorological data in seven districts of Lishui from these started,the climate resources were statistical analyzed,to reduce the adverse impact of late spring coldness on agricultural production.The results showed： in spatial distribution,the total number of late spring coldness appeared in northwest Suichang are most,southeast of Qingtian are least;in temporal distribution,late spring coldness appeared more than most in early April.Late spring coldness is continuous rainy type.According to the hazard degree index,we selected the year seriously affected,studied atmospheric circulation background and found that some winter circulation feature index has certain indications for late spring coldness.