摘要
统计雷州半岛东部海岛自动站的近4年观测资料,分析得到雷州半岛东部沿海海面风的时间变化特征和大风特点。结果表明:雷州半岛东部沿海风速冬季最大、夏季最小;日平均风速分布呈单峰型,且日较差较小,正午前后风速较大,傍晚到次日早上风速较小;全年主导风向为东南、东北和偏东风,春季的主导风向为东南、偏东风,夏季以东南风向为主,秋季主导风向为东北风和偏东风,冬季主导风向为东北风;热带气旋和冷空气是造成沿海大风的主要原因;热带气旋所致大风的平均阵风系数和离散度均明显大于冷空气样本。
Based on a statistical study of four-year observations by automatic weather stations on islands off the east coast of Leizhou Peninsula,this paper determines the spatiotemporal variations and strong wind characteristics over the sea surface in the offshore area.The result is shown as follows.The wind is the maximum in winter but minimum in summer.Daily mean wind speeds are unimodally distributed with small diurnal range.Wind speed is large around midday but small from early evening to the following morning.Annually,the dominating wind direction is from the southeast,northeast and east.Seasonally,it is mainly from the southeast and east in spring,southeast in summer,northeast and east in autumn,and northeast in winter.The offshore high winds are mainly caused by tropical cyclones and cold air activity.Average gust coefficients and discrete degrees resulted from tropical cyclones are much bigger that of the cold air.
作者
于洲
张文萌
符靖茹
陈辰
YU Zhou;ZHANG Wen-meng;FU Jing-ru;CHEN Cheng(Meteorological Bureau of Zhanjiang City,Zhanjiang 524000;Meteorological Bureau of Foshan City,Foshan 528000)
出处
《广东气象》
2020年第3期10-13,18,共5页
Guangdong Meteorology
基金
湛江市气象局立项项目(2017C03)。
关键词
气候学
海面风
雷州半岛
climatology
sea surface wind
Leizhou Peninsula
作者简介
于洲(1991年生),男,硕士,助理工程师,主要从事天气预报工作。E-mail:379122046@qq.com。
