| 粤北地区导线覆冰气象特征与标准厚度推算 |
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| 引用本文： | 黄浩辉,宋丽莉,秦鹏,刘爱君,蒋承霖.粤北地区导线覆冰气象特征与标准厚度推算[J].热带气象学报,2010,26(1):7-12. |
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| 作者姓名： | 黄浩辉 宋丽莉 秦鹏 刘爱君 蒋承霖 |
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| 作者单位： | 1. 广东省气候中心,广东,广州,510080
2. 广东省气候中心,广东,广州,510080;中国气象局广州热带海洋气象研究所,广东,广州,510080 |
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| 基金项目： | 广东省科技计划项目，国家科技部公益性行业科研专项 |
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| 摘 要： | 利用广东省乐昌高山气象站1972—1978年观冰资料和气候资料,分析了粤北地区导线覆冰的气象特征,建立了导线覆冰标准冰厚的气象推算模型。根据乐昌国家气象站的历史资料,对乐昌高山气象站的气候资料进行订正延长,构建了乐昌高山气象站覆冰年极值长年代序列,并推算出离地不同高度各重现期的标准冰厚值。结果表明,粤北地区导线覆冰主要发生在1月,其次为2月和12月,平均覆冰期在90天左右,最长覆冰期可达131天以上。主导风向、日最低气温、日降水量是影响导线覆冰厚度的主要气象因素。标准冰厚的年极值序列服从极值I型概率分布,历史上的最大导线覆冰值出现在2008年1月26日,2m高度标准冰厚达64.4mm,15m高度标准冰厚达92.7mm,与2008年冰灾实况调查的覆冰厚度(标准冰厚)115mm较为接近。
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| 关 键 词： | 导线覆冰 标准冰厚 气象特征 推算 粤北 |
METEOROLOGICAL CHARACTERISTICS AND STANDARD THICKNESS CALCULATIONS OF WIRE ICING OVER THE NORTH REGION OF GUANGDONG PROVINCE |
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| HUANG Hao-hui,SONG Li-li,QIN Peng,LIU Ai-jun,JIANG Cheng-lin.METEOROLOGICAL CHARACTERISTICS AND STANDARD THICKNESS CALCULATIONS OF WIRE ICING OVER THE NORTH REGION OF GUANGDONG PROVINCE[J].Journal of Tropical Meteorology,2010,26(1):7-12. |
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| Authors: | HUANG Hao-hui SONG Li-li QIN Peng LIU Ai-jun JIANG Cheng-lin |
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| Abstract: | Using the wire icing observational data and climate data of a Lechang high-mountain weather station during 1972-1978, this paper analyses the meteorological characteristics of wire icing over the north region of Guangdong province and builds a calculation model for standard ice thickness in wire icing. Using historical observational data of the Lechang national weather station located nearby, this paper extends high-mountain climate data of the station and builds a long series of yearly maximum standard ice thickness. Then, standard ice thicknesses in different reproduced periods at different heights are calculated. The results show that wire icing over the north region of Guangdong province mostly occurs in January, followed in turn by February and December; the average icing period lasts about 90 days and the longest icing period reaches 131 days. Predominant wind direction, daily minimum air temperature and daily precipitation are the major meteorological factors to influence wire icing thickness. The series of yearly maximum standard ice thickness follows a pattern of extreme probability. The maximum wire icing thickness occurs in Jan. 26, 2008, with a standard ice thickness of 64.4 mm at 2 m and 92.7 mm at 15 m, which is close to that of 115 mm obtained from an investigation about wire icing damage in 2008. |
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| Keywords: | wire icing standard ice thickness meteorological characteristics calculation north of Guangdong province |
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