摘要
本文利用1961~2019年贵州省85站逐日的雨凇、雾凇资料,通过对样本数据的统计分析以及3个现有指标的对比分析,订正了贵州省单站凝冻过程的指标和分级标准,并根据新的标准对其特征进行分析。结果表明,贵州省凝冻过程的持续天数为3~39天,随着凝冻过程持续天数的增加,其发生频率呈指数下降。凝冻过程开始初日和结束终日时间序列之间存在凝冻过程开始初日偏早/偏晚,结束终日也偏早/偏晚的现象。随着凝冻等级的升高,其影响范围在不断缩小,但大值区主要仍集中在26.5°~27.5°N,低值区仍在贵州省北部和南部地区,且59a间4个不同等级单站凝冻过程的站次均呈缓慢减少趋势。4个典型站的凝冻过程主要集中出现时间基本一致,1月占比最多,2月次之,而11月最少。分旬来看,主要集中出现在1月中旬至2月上旬,11月上旬最少。
Using the daily glaze and rime data of 85 stations in Guizhou Province from 1961 to 2019,analyzing and comparing three existing indicators of freezing,the index and classification standards of the freezing process of a single station in Guizhou Province are revised.And analyze the characteristics according to the new standard.The results show that the duration of freezing process in Guizhou Province is 3 to 39 days.As the duration of freezing process increases,the frequency of occurrence decreases exponentially.There is a phenomenon that the first day of the freezing process is early/late,and the end day is also early/late.With the increase of freezing levels,the scope of its influence is shrinking,but the high-value areas are still concentrated between 26.5 and 27.5°N.The low-value areas are still in the northern and southern.The number of the freezing process of 4 different grades of single station showed a slow decrease trend in 59 years.The freezing process of the four typical stations occurred in the same time,with the largest proportion in January,the second in February,and the least in November.It mainly appeared in mid-January to early February,with the least in early November.
作者
李忠燕
张东海
严小冬
任曼琳
段莹
周涛
LI Zhongyan;ZHANG Donghai;YAN Xiaodong;REN Manlin;DUAN Ying;ZHOU Tao(Guizhou Climate Center,Guiyang 550002,China;Guizhou Key Laboratory of Mountainous Climate and Resource,Guiyang 550002,China;Guizhou Ecological Meteorology and Satellite Remote Sensing Center,Guiyang 550002,China)
出处
《高原山地气象研究》
2020年第4期60-64,共5页
Plateau and Mountain Meteorology Research
基金
国家自然科学基金项目(41865005)。
关键词
单站凝冻过程
指标
订正
single station freezing process
index
correction
