湖北农业科学 ›› 2020, Vol. 59 ›› Issue (7): 121-125.doi: 10.14088/j.cnki.issn0439-8114.2020.07.025

• 资源·环境 • 上一篇    下一篇

杭州市冬季降水相态判别指标研究

李进, 毛则剑, 周娟   

  1. 杭州市气象局,杭州310051
  • 收稿日期:2019-07-04 发布日期:2020-06-28
  • 作者简介:李进(1987-),女,甘肃庆阳人,工程师,硕士,主要从事天气预报预测研究,(电话)13588793269(电子信箱)602469997@qq.com。
  • 基金资助:
    杭州市0-15天中短期精细化天气预报产品开发项目(ZJZBC-18-9004); 杭州市气象局科技计划项目(QX201913)

Study on discrimination index of winter precipitation types in Hangzhou city

LI Jin, MAO Ze-jian, ZHOU Juan   

  1. Hangzhou Meteorological Service, Hangzhou 310051, China
  • Received:2019-07-04 Published:2020-06-28

摘要: 采用杭州市2008—2017年冬季逐日地面观测资料和高空探空资料,选取与降水相态转换关系密切的温度和厚度指标进行分析,最终凝练出适合杭州市的冬季雨雪相态客观识别判据。经检验发现该识别判据对雨和雪的识别可用性均较好,TS评分均高达100%,无漏报与空报现象。在实际应用中,若出现与客观判据中某些指标阈值不一致的天气个例,可结合研究中提出的补充参考判据。该研究结果可为杭州市冬季的日常业务预报提供参考依据。

关键词: 降水相态, 厚度指标, 识别判据, 冬季, 杭州市

Abstract: Based on the daily radiosonde data and surface observation data in winter during 2008 and 2017 in Hangzhou city, the indices on temperature and thickness closely related to transformation of precipitation phase are studied. Eventually, a set of objective discrimination criterion for different precipitation types is summarized in Hangzhou city. The test results show that the objective discrimination criterion has a good performance to rain and snow, and there is neither empty report nor missing report with TS scores of 100%。 In practical application, while weather factors are inconsistent with thresholds of some indices in this discrimination criterion, the supplementary reference criterions proposed in this paper can be combined. Results from this paper can provide a reference for the daily operational forecasting of Hangzhou city in winter.

Key words: precipitation phase, thickness index, discrimination criterion, winter, Hangzhou city

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