十堰市水稻育秧期连阴雨特征分析

利用1971-2007年十堰市7个气象观测站的3月下旬-5月上旬的气象资料，对十堰市水稻播种育秧期间长、中、短期连阴雨的时空分布及各年代间演变规律进行了分析。结果表明：3月下旬-5月上旬，全市连阴雨出现频率的总趋势是自北向南增加，受连阴雨影响的程度也是南部地区大于北部地区。20世纪90年代，长、中期连阴雨出现频率较80年代有明显增加。进入21世纪以后，长、中、短期连阴雨的发生次数和出现频率虽有明显下降，但仍是十堰市水稻育秧期间的主要农业气象灾害之一。

Analysis of Continuous Rain at Rice Seedling Stage in Shiyan City

Based on the meteorological information of seven meteorological observation stations in Shiyan city from late March to early May during 1971~2007,the long,medium and short-term spatial and temporal distribution of rain and the evolution of the law at rice seedling stage in Shiyan city were analyzed.The results indicated that,the rain frequency in general trend increased from north to south,the extent affected by the rain in the southern region was larger than that in northern region.Long and mid-term rain frequency in the 1990s obviously increased in comparison with that in the 1980s.In the 21st century,the long,medium,short-term rain in the number and frequency decreased significantly,but it was still the major agro-meteorological disasters in Shiyan city to rice seedlings.