文章摘要
任兆鹏1,2,张苏平3,马艳1,凌艺1.青岛冬半年降水相态统计分析及判别方法研究[J].海洋气象学报,2018,38(1):27-33
青岛冬半年降水相态统计分析及判别方法研究
Statistical analysis and discrimination criterion on precipitation types of winter half year in Qingdao
投稿时间:2017-10-28  修订日期:2017-12-22
DOI:10.19513/j.cnki.issn2096-3599.2018.01.004
中文关键词: 降水相态  雨雪转换  判别指标
英文关键词: precipitation types  rain-snow conversion  discrimination criterion
基金项目:青岛市气象局科研项目(2015qdqxc03,2014qdqxd12)
作者单位
任兆鹏1,2,张苏平3,马艳1,凌艺1 1. 青岛市气象局山东 青岛 266003 2. 青岛市气象灾害防御工程技术研究中心山东 青岛 266003 3. 中国海洋大学物理海洋教育部重点实验室和海洋-大气相互作用与气候实验室山东 青岛 266100 
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中文摘要:
      通过对2006—2015年青岛冬半年不同相态降水的统计分析得出,青岛冬半年纯雨日数1月最少,纯雪日数2月最多,12月和1月是雨夹雪及雨雪转换日数占当月降水日数比例最高的两个月。通过个例分析表明,雨雪转换过程多与冷空气入侵相联系。温度场和风场条件能较好地反映出雨雪转换的特征,降温和风向转换在850 hPa以下层更为明显。探空资料分析表明,850 hPa、925 hPa、1 000 hPa和地面气温对不同相态降水都有很好的指示意义,越低层指示性越好。0 ℃层高度对不同相态降水同样具有指示意义,100~500 m高度是雨雪转换的关键高度层;以不同高度层气温为指标确定出青岛冬半年降水相态预报判别指标。
英文摘要:
      Using the precipitation data collected in Qingdao from 2006 to 2015, different precipitation types during the winter half year was analyzed. Result shows that the monthly rainfall-day is minimum in January and the snowfall-day is maximum in February. The sleet and rain-snow conversion events take the highest proportion of precipitation days in December and January. Cases study shows that the rain-snow conversion is closely related to cold air intrusion. The temperature and wind field can manifest the characteristics of the rain-snow conversion, especially in the level under 850 hPa where the cooling and wind direction changing are more obvious. Soundings data show that temperature at the 850 hPa, 925 hPa, 1 000 hPa and the ground temperature are good indicators for different precipitation types with the better correlation in the lower level. The level of 0 ℃ temperature is also an indicator for precipitation types, of which the altitude between 100 m and 500 m is the key level for rain-snow conversion. The discrimination of precipitation types in Qingdao mainly depends on the temperature at these key levels.
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