摘要
根据大连气象站1980—2013年的能见度、天气现象、湿度、风等资料,采用趋势分析、相关分析、频率分析等方法,研究了大连市能见度的变化特征及影响因子。结果表明:近34 a来,大连市能见度呈显著(α=0.01)的下降趋势,下降速率为1.4 km/10a。一年中秋季能见度最好,夏季能见度最差;月最大值出现在10月,最小值在7月;一日当中14时能见度最好,08时能见度最差;小于10.0 km的低能见度事件显著增加。大连市能见度的下降可能与雾霾天气增多、水汽压增加及风速的减小有关。
According to the ground data of Dalian national basic meteorological observing station during 1980—2013,such as visibility,weather phenomenon,humidity and wind,etc,using the methods of trend analysis,correlation analysis,frequency analysis,etc,the variation characteristics and influential factors of visibility in Dalian were studied. The results showed that the visibility has declined significantly（ α = 0. 01） in recent 34 years in Dalian. The rate of falling was 1. 4 km /10 a. The best visibility was in autumn,the worst was in summer. The maximum visibility was in October,and the minimum visibility was in July. During the day,the best visibility appeared at 14： 00,the worst visibility appeared at08： 00. The event of less than 10. 0 km visibility increased significantly. The decrease of visibility may be related to the increase of the fog and haze weather,water vapor pressure,and the decrease of the wind speed.
作者
宋军
孙丽娟
孙贞
高磊
Song Jun Sun Lijuan Sun Zhen Gao Lei(Dalian Meteorological Equipment Support Center, Dalian 116001, China Dalian Public Meteorological Service Center, Dalian 116001 ,China Dalian Meteorological Information Center, Dalian 116001, China)
出处
《气象与环境科学》
2016年第4期98-103,共6页
Meteorological and Environmental Sciences
基金
中国气象局业务项目(320100S011C00)资助
关键词
能见度
变化特征
影响因子
大连
visibility
variation characteristics
influencing factor
Dalian
