气象2023，Vol.49Issue(12)：1509-1520,12.DOI:10.7519/j.issn.1000-0526.2023.060601
南方三个省电线积冰时空分布特征
Spatio-Temporal Distribution of Wire Icing in Three Southern Provinces
摘要
Abstract
Based on daily observation data of wire icing of 191 meteorological stations in Guizhou,Hunan and Jiangxi provinces from 1961 to 2019,the number of wire icing days,the extreme values of standard ice thickness,the maximum consecutive icing days,and the beginning and ending dates of wire icing in the study area are calculated.The wire icing risk indicator is constructed to evaluate the risk of wire icing.The results show that the number of wire icing days shows a slight downward trend on the whole in the past 60 years,and it reached the maximum value in the 1980s.Wire icing occurs most in January.The extreme values of standard ice thickness are concentrated in 20-50 mm,and most of the extreme values are found in Hunan.The interdecadal distribution is extremely uneven,the most of the extreme values are seen in 2011-2019.The maximum consecutive icing days are concentrated in 5-15 days.On the whole,the max-imum consecutive icing days in Guizhou are more than in Hunan and Jiangxi.The beginning date of wire icing tends to be advanced in fluctuation,but the ending date tends to be postponed in fluctuation.The an-nual change of the wire icing risk indicator shows a decreasing trend.The high-risk areas for wire icing are mainly located in central and western Guizhou,central Hunan and northern Jiangxi,with a wire icing risk indicator greater than 0.6.关键词
电线积冰日数/标准冰厚/连续积冰日数/时空分布/风险指数Key words
wire icing days/standard ice thickness/consecutive icing days/spatio-temporal distribution/risk indicator分类
大气科学引用本文复制引用
李春晖,霍治国,孔瑞,江梦圆,张海燕,毛红丹,宋艳玲..南方三个省电线积冰时空分布特征[J].气象,2023,49(12):1509-1520,12.基金项目
中国气象局创新发展专项(CXFZ2022J023、CXFZ2023J031)、陕西省自然科学基础研究计划(2022JQ-249、2023-JC-YB-283)、秦岭和黄土高原生态环境气象重点实验室开放研究基金课题(2023G-2)和中国气象局复盘总结专项(FPZJ2023-129)共同资助 （CXFZ2022J023、CXFZ2023J031）
