辽宁省初霜特征及预报技术指标初探  

First Frost Characteristics and Forecast Technical Index of Liaoning Province

作　　者：陆忠艳[1] 韩江文[1] 李萍[1] 贾旭轩[1] 李爽[1] 沈玉敏[1] 

机构地区：[1]辽宁省气象台,沈阳110016

出　　处：《中国农学通报》2014年第36期257-263,共7页Chinese Agricultural Science Bulletin

基　　金：辽宁省气象台现代化建设项目"重大天气预报技术指标体系和预报流程完善"

摘　　要：选取辽宁省秋季地面最低气温≤0℃的初日作为初霜日期,使用1961—2010年辽宁省14个测站初霜日期资料,分析初霜的时空分布规律。结果表明,自9月中下旬开始,辽宁省自西北、东北开始向南出现初霜,初霜出现日期,山区比平原地区早,沿海地区较晚,大连地区最晚。随着年代的变化,初霜出现日期整体呈推迟趋势。利用历史天气图资料,对近50年辽宁省初霜的天气特征进行分析,研究初霜出现前24 h的环流形势特征,总结初霜预报技术指标,规范预报业务流程,为实时预报业务提供参考。The study selected the beginning date of ground minimum temperature less than or equal to 0~C as first frost date in autumn of Liaoning province and used first frost date data of 14 stations from 1961 to 2010, to analyze first frost temporal and spatial distribution. The results showed that since mid-late September, first frost occurred from the northwest, northeast to the south of Liaoning, the date of first frost appeared earlier in mountain area than in plain region, came later in coastal area and finally to Dalian area. Along with the time change, the trend of the first frost occurrence date was postponed. Based on the weather chart, the paper discussed the first frost circulation characteristics 24 hours before the frost occurrence, summarized the first frost forecast index, standardized forecast process and provided reference for the real-time forecast

关 键 词：初霜 环流分型 预报指标 

分 类 号：S165[农业科学—农业气象学]