利用2013年南京地区CE318太阳光度计地基观测反演资料,分析了气溶胶光学特性的变化特征,并根据图解法对该地区气溶胶类型分布特征进行研究.结果表明:南京地区气溶胶光学厚度(AOD)月平均的最大值出现在1月(0.97±0.49),最小值出现在7月(0.53±0.37),全年均值为0.71±0.42.除了3月受沙尘事件影响外,(A)ngstr(o)m波长指数(α)在全年其余月份值均高于0.8,最大值出现在8月和12月(1.24±0.17);AOD季节平均值在冬季(0.85±0.47)和春季(0.72±0.45)略高于夏季(0.63±0.40)和秋季(0.62±0.36).α季节平均值特征表现为冬季(1.18±0.16)＞夏季(1.15±0.32)＞秋季(1.05±0.33)＞春季(0.86±0.21);AOD的日变化呈现早晚高,白天比较稳定的特征,冬季呈现出单峰变化特征,峰值出现在13:00(1.05±0.64);工业型和城市型复合污染导致细粒子污染占比较高,全年AOD和α频率分布呈现明显的单峰分布特征,峰值中心分别位于0.53和1.2,对应最大频率分别为21％和16％;根据α和δα函数图解法得到南京地区AOD高值区(＞0.7)主要集中在细模态粒子增长部分(1.0＜α＜1.4,δα＜0,η～ 70％),粒径范围在0.10～0.15μm之间.%By using the ground-based observation retrieval data from CE318 sun-photometer in Nanjing of 2003,the variation characteristics of aerosol optical properties were analyzed.Moreover,the graphical method was used to analyze the aerosol type classification.Results show that the maximum of the Aerosol Optical Depth (AOD) in Nanjing occurred in January (0.97±0.49),the minimum one appeared in July (0.53±0.37),and the annual mean value was 0.71±0.42;except March,the value of (A)ngstr(o)m exponent α was 0.8 higher in the rest months,and the maximum value appeared in August and December(1.24±0.17);the seasonal mean value of AOD in winter (0.85±0.47) and spring (0.72±0.45) were slightly higher than that in summer (0.63±0.40) and autumn (0.62±0.36),and the seasonal mean value of α were as follows:winter (1.18±0.16) ＞summer(1.15±0.32) ＞autumn (1.05±0.33)＞spring (0.86±0.21).The diurnal variation of AOD presented high value in the morning and evening and relatively stable during the day,however,a single peak existed in winter,which appeared at 13:00 with the value of 1.05±0.64.Industrial and urban composite pollution caused by fine particle pollution accounted for a relatively high proportion.The most frequent distribution of AOD and α with the peak center at 0.53 and 1.2 accounted for 21％ and 16％.The AOD high value area(＞0.7) in Nanjing data mainly centered in the fine mode growth part(1.0＜α＜ 1.4,δα＜0,η～70％),and aerosol fine mode size ranged from 0.10 to 0.15 μm.
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