利用多种分辨率的MODIS气溶胶产品，分析2000—2013年间北疆地区气溶胶光学厚度（ AOD）的时空分布和变化特征，并结合对应能见度资料，对两者的相关性进行分析。结果表明，空间上，区域内近14 a平均AOD大体呈现中心高、边缘低的分布格局；高值区内地级城市年均AOD为0�335，是对应北疆地区均值的1�33倍，其中奎屯市AOD最高；次高值区内地级城市年均AOD为0�202，是对应北疆地区均值的0�80倍，其中塔城市AOD最低；低值区内无地级城市。时间上，近14 a北疆年均AOD值在0�221～0�283之间变化，2003年最高，2005年最低；AOD值春季最大，秋季最小，全区四季AOD多年变化均呈下降趋势，冬季下降幅度最大；近14 a月平均AOD值在0�186～0�395之间变化，最高值出现在2月，最低值出现在10月；塔城和阿勒泰的月均AOD与能见度之间呈显著负相关（ P＜0�05），而乌鲁木齐和石河子的月均AOD与能见度之间呈显著正相关（ P＜0�05）。%Spatio⁃temporal distribution and variation of the aerosol optical depth ( AOD) in North Xinjiang in 2000-2013 was analyzed using MODIS aerosol products various in resolution, and compared with the corresponding visibility data a⁃vailable for correlation analysis. Results show that spatially the mean AOD of the area in the past 14 years was high in the centre and low along the rim;the annual mean AOD of prefecture⁃level cities in the high⁃value region was 0�335, about 1�33 times as high as that of North Xinjiang, and was the highest in Kuitun;the annual mean AOD of prefecture⁃level cit⁃ies in the sub⁃high value region was 0�202, about 0�80 times as high as that of North Xinjiang and was the lowest in Tacheng;and there was no prefecture⁃level city in the low value region. Temporally, the annual mean AOD of North Xin⁃jiang varied between 0�221 and 0�283 in the past 14 years, peaking in 2003 and bottoming in 2005;Within a year, AOD was the highest in spring and the lowest in autumn. For years, AODs in all the four seasons displayed a declining trend, and the drop in winter was the most significant;the monthly mean AOD of North Xinjiang varied between 0�186 and 0�395 in the past 14 years, peaking in February and bottoming in October. A significantly negative relationship was observed be⁃tween monthly mean AOD and monthly mean visibility in Tacheng and Altay ( P<0�05) , while a reverse one was between the two in Urumqi and Shihezi ( P<0�05) .
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