大连地区阵风系数特征分析  

Characteristics of gust coefficients in Dalian

作　　者：李昱茜 杨景泰 隋玉秀 邬晓冬 张黎红 孙立娟 王蕾 肖剑[2] LI Yu-qian;YANG Jing-tai;SUI Yu-xiu;WU Xiao-dong;ZHANG Li-hong;SUN Li-juan;WANG Lei;XIAO Jian(Dalian Meteorological Service Center,Dalian 116001,China;Air Force Aviation University,Jinzhou 121000,China)

机构地区：[1]大连市气象服务中心,辽宁大连116001 [2]空军航空大学,辽宁锦州121000

出　　处：《气象与环境学报》2022年第5期98-105,共8页Journal of Meteorology and Environment

基　　金：环渤海区域科技协同创新基金项目(QYXM201907)资助。

摘　　要：利用2015年5月至2020年4月辽宁省大连地区9个国家气象站、2017年165个区域气象站逐10 min测风资料,从风向、风级、月际变化、日变化、空间分布和天气影响系统等对大连地区最大、平均、最小阵风系数进行统计分析。结果表明:1—12月平均阵风系数的变化范围为1.66~1.77,秋末冬初平均阵风系数偏大,春夏季节偏小;与冷空气相对应风向的平均阵风系数大于与暖空气相对应的风向;随着风级的增大,最大、最小阵风系数向平均阵风系数收敛;不同风级下阵风系数的频率分布均呈单峰型分布,风级越大,分布范围越窄。除西南风外,其他风向的阵风系数均表现出白天大、夜间小的特点。大连地区阵风系数具有明显的地域特点,东南和西北部沿海区域的阵风系数比内陆和西南沿海偏小,风向基本不影响阵风系数的空间分布。大连的大风过程多受海上气旋和高压前部双系统共同影响,气旋、台风以及雷暴大风的平均阵风系数大于同风级的平均值。Based on the observation data of 10-minute wind at 9 national weather stations and 165 regional weather stations in the Dalian region of Liaoning province from May 2015 to April 2020,the maximum,mean,and minimum gust coefficients in the Dalian region were statistically analyzed in terms of wind direction,wind level,monthly variation,daily variation,spatial variation and weather influence system.The results show that the variation of the mean gust coefficients from January to December ranges from 1.66 to 1.77.The average gust coefficient of the wind direction corresponding to the cold air is larger than that corresponding to the warm air.The mean gust coefficient of the wind directions corresponding to cold air is greater than the wind directions corresponding to warm air.With the increase in wind level,the maximum and minimum gust coefficients converge to the average gust coefficient.The frequency distribution of the gust coefficient at different wind levels is unimodal,and the larger the wind level appears,the narrower the distribution ranges.Except for the southwesterly wind,the gust coefficients of other wind directions are high during the day and low at night.The gust coefficient in Dalian has obvious regional characteristics.The wind gust coefficient in the southeast and northwest coastal areas is smaller than that in inland and southwest coastal areas,and the wind direction does not affect the spatial distribution of the wind gust coefficient.The winding process in Dalian is mainly affected by the dual systems of a maritime cyclone and front high pressure,thus the average gust coefficient of a cyclone,typhoon,and thunderstorm gale is larger than the average of the same wind level.

关 键 词：阵风 阵风系数 10 min平均风速 半岛地区 

分 类 号：P468.026[天文地球—大气科学及气象学]