摘要
利用本溪1981—2013年10月—次年4月降水资料,统计分析了近33年本溪冬半年不同降水相态的气候特征,得出本溪雨雪转换多发季节主要为3月和11月。利用2005—2013年10月—次年4月的探空资料和自动站数据,对近9年本溪冬半年不同相态降水过程的大气层结特征进行统计研究。结果表明：本溪冬半年出现雪时各层温度及地面温度均低于0℃;出现雨时0℃层高度在850~700 h Pa之间;雨雪转换时0℃层高度在925 h Pa附近,各层温度范围分别为：700 h Pa的温度范围[-11℃,-7℃]、850 h Pa的温度范围[-6.5℃,-1.5℃]、9250 h Pa的温度范围[-3℃,1℃]、1000 h Pa的温度范围[0℃,3℃],地面温度小于1000 h Pa温度。本工作的结果除适用于本溪地区的相关预报业务以外,还可以对辽宁东部山区及吉林部分地区的降水相态预报提供较好的参考。
Based on the precipitation data of Benxi during October to April in 1981- 2013, the climaticcharacteristics of precipitation phase in the winter- half- year were analyzed. The results showed that theconversion between snow and rainfall usually happened in March and November. The analysis of atmosphericstratification based on sounding and automatic station data in winter-half-year during 2005-2013 indicatedthat different precipitation phases corresponded to different heights. When it was snowing, both the upper andsurface temperatures were under 0℃; when it was raining, the height of 0℃ level was between 850 h Pa and700 h Pa; during the conversation of rain and snow, the height of 0℃ level was close to 925 h Pa. In thissituation, the temperature range at 700 h Pa was-11℃ to-7℃, at 850 h Pa was-6.5℃ to-1.5℃, at 925 h Pawas- 3℃ to 1℃, and at 1000 h Pa was 0℃ to 3℃, and the surface temperature was lower than 1000 h Patemperature. The results of this study will be useful for Benxi, the eastern mountainous areas of Liaoning andsome areas of Jilin to forecast the precipitation phase.
出处
《中国农学通报》
2015年第22期243-247,共5页
Chinese Agricultural Science Bulletin
基金
本溪市气象局科研项目"本溪雨雪转换天气客观预报方法研究"(BXSQXJ201403)
关键词
冬半年
降水相态
识别判据
winter-half-year
precipitation phase
identification criterion
