梅州城区雾和霾的气候特征分析

为了研究本地区雾和霾的规律和趋势,利用梅州市气象局1990-2008年近20a的雾日和霾日统计资料,通过线性回归分析的方法从年、季和持续时间上分析了梅州城区的雾、霾气候特征.结果表明：1990-2008年期间梅州城区雾日数呈逐渐显著性减少的趋势,年雾日数减少幅度为0.4561d/a,霾日数从2005年之后开始呈明显增加趋势;雾在冬季最多,秋季和夏季最少,霾在冬季最多,夏季最少.另外,霾一年四季均有出现,且出现的几率不断增加,持续时间也不断增长.

Analysis on climatic characteristics of fog and haze in Meizhou

Based on fog and haze statistics from 1990 to 2008 for nearly 20 years in Meizhou city meteorological service, the climate characteristics of fog and haze in Meizhou city were analyzed from from year, season, and the duration by the method of linear regression to study the law of the region＇s fog and haze and trends. The results show that fog days showed a trend of significant reduce gradually during 1990-2008 in Meizhou city, annual fog days decrease rate of 0.4561 d/a, haze days showed a trend of increased significantly from 2005; the most fog in the winter, autumn and summer, the least haze in the winter, summer at least. In addition, the haze appeares in all year, the chances of appearing continue to increase, and the duration is also growing.