福建省顺昌地区春播期低温气候特征与中期预报

Low temperature climatic characteristics in the spring sowing period in Shunchang,Fujian and its mid-term forecast

通过对1960-2009年福建省顺昌县50年春播期(3月上旬-4月上旬)出现持续3 d以上日平均气温≤12℃低温天气过程的气候特征进行分析表明,顺昌地区春播期日平均气温呈上升趋势,近10年春播期气温回暖明显。利用500 hpa大气环流分型配合顺昌观测站温、压气象要素特征,可作出春播期低温天气过程的中期预报。

According to the analysis of the climate characteristics of low temperature weather process in which the daily mean tem- perature ≤12 ℃ last for more than 3 days in the spring sowing period （from the first ten days of March to the first ten days of April） in the past 50 years （from 1960 to 2009） in Shunchang County, Fujian Province, the daily mean temperature in the spring sowing period in this region tended to be on the rise, and the temperature in the spring sowing period rose obviously in the past 10 years. Thus 500 hpa atmospheric circulation classification combining with meteorological factors of temperature and pressure from the Shun- chang Observation Station can be taken as the basis of mid-term forecast of los temperature weatber process in the spring sowing period.