2009年广州能见度变化规律及主要影响因素分析

摘要

通过对2009年的广州大气能见度和影响因素的数据资料统计,结合定性分析、相关性计算及各时间尺度中物理量的相互作用过程研究,得出能见度的变化规律和各因素的相关性特征.结果表明,2009年整体能见度水平略有提高；24h的降雨量、气温差值较大时,该日的能见度小时均值波动较大；风速、相对湿度与中尺度(24h)能见度的相关性较强；降雨量、气温对小尺度(1h、5min)能见度影响显著；相对湿度水平能制约风速对能见度的改善作用.灰霾现象等与能见度水平密切相关.%Through counting the date of visibility and main influencing factors of Guangzhou in 2009, with the qualitative analysis, correlation calculation and the interaction of physical quantities in the different time scales, obtaining variation of visibility and the characteristics of the correction factors. The results showed that; There was a slight improvement of visibility in 2009; 24h rainfall; As the temperature difference is large, visibility hour value fluctuations; Wind speed, relative humidity are in the strong correlation with the mesoscale(24h) visibility; Rainfall, air temperature on the small-scale( lhs5min) significantly affected the visibility; Relative humidity levels can restrict the visibility improvement result of the wind speed.