中文摘要：

利用MODIS气溶胶产品和气象观测资料分析了能见度与MODIS气溶胶产品和气象要素的相关关系,并运用多元回归方法建立了安徽省不同季节能见度的反演模型,在此基础上分析安徽省能见度的时空分布特征。结果表明：（1）能见度与气溶胶光学厚度（AOD）、气溶胶质量浓度（MASS）和相对湿度呈显著负相关,AOD、MASS经气溶胶标高垂直订正后,与能见度相关性显著提高;（2）反演能见度与实测能见度相关系数为0.689（P〈0.001）,对于平均值为16.80 km的能见度观测值,反演的平均偏差MBE为-0.25 km,均方根误差RMSE为4.21 km;（3）安徽省能见度空间分布不均,皖南山区、大别山区,以及淮北平原能见度较高,沿江、江淮之间中部,以及沿淮部分地区为能见度的低值区;能见度有明显的季节变化特征,春、夏季高于秋、冬季,6月份能见度明显小于下半年的其他月份,可能与秸秆焚烧有关。

英文摘要：

Based on the MODIS/Terra aerosol products and meteorological data, the correlations between visibility and MODIS/Terra aerosol products, as well as meteorological elements were analyzed. And then the inversion model of visibility in different seasons was built by using the multiple regression method. Furthermore, the temporal and spatial distribution characteristics of visibility in Anhui Province were studied. Results indicated that visibility had a significant negative correlation with aerosol optical depth （AOD）, mass concentration （MASS） and relative humidity. The seasonal average aerosol scalar heights were obtained by using a formula for visibility and AOD. After correcting by the seasonal average aerosol scalar heights, the correlation coefficient between visibility and AOD, MASS were significantly increased. The correlation coefficient of estimated value of visibility with the actual observation was 0.689 （P 〈0.001）. With an average visibility of 16.80 km, ：the mean bias error （MBE） and root mean square error （RMSE） were -0.25 km and 4.21 kin, respectively. The spatial distribution of visibility in the Province was not uniform and the higher lay on the southern Anhui and Dabie Mountains, as well as Huaibei Plain; while the low-value areas were in middle of Yangtze-Huaihe basins, the region along Yangtze River,and part of the region along Huaihe River. There was obvious seasonal variation feature in visibility, with the highest in spring and summer and the lowest in autumn and winter. It was noted that compared with other month of summer half year, visibility in June was obvious lower, it was probably related to the straw burning.