南京地区大气气溶胶综合观测与对比分析

发布时间：2018-06-02 15:29

本文选题：气溶胶 + MODIS　；参考：《遥感学报》2017年01期

【摘要】：利用CE-318太阳光度计、MPL激光雷达与卫星观测数据,分别采用光谱消光法、Fernald方法以及MODIS暗像元法(DDV)反演南京地区气溶胶光学厚度,并进行了对比分析。通过研究分析3月3日、6日卫星反演气溶胶光学厚度的空间分布图,发现长江流域附近以及市区(除老山、中山陵等山区地带之外)的AOD较高。3月3日太阳光度计、激光雷达与卫星数据在站点位置(南京信息工程大学,118.7°E,32.2°N)的AOD值分别为0.455、0.289、0.4;3月6日的AOD值分别为0.373、0.267、0.25。通过对比分析3月至9月之间的多天数据,可得3种数据计算所得AOD相差不大,说明卫星与激光雷达反演数据相对可靠。其中,3月3日与3月6日的太阳光度计数据显示,观测地区出现常见的两种AOD变化类型:一种是早晚高,中午低;一种是早低晚高。此外,激光雷达所得数据结果随着时间的变化幅度较大,且可以在有云的天气条件下探测气溶胶;本文利用激光雷达数据计算出的9 km以下AOD值多数在0.3左右,3月3日与3月6日两天之中,2 km以下较脏,出现了一些气溶胶层,6km以上相对比较干净,个别时段6 km以上高空存在云层。与地基观测相比,卫星虽然时间分辨率虽然低,但是对于大面积的趋势分析却有着绝对的优势。在今后的气溶胶观测发展中,结合三者的优势,有助于以较高精度,大面积反演大气气溶胶空间分布情况,获得较准确的气溶胶参数。
[Abstract]:Using the CE-318 solar photometer MPL lidar and satellite observation data, the spectral extinction method and the MODIS dark pixel method are used to retrieve the aerosol optical thickness in Nanjing area, and the results are compared and analyzed. By studying and analyzing the spatial distribution map of aerosol optical thickness inversion by satellite on March 3 and 6, it is found that the AOD in the vicinity of the Yangtze River valley and in the urban area (except Laoshan, Zhongshan Mausoleum and other mountainous areas) is relatively high. The AOD values of the lidar and satellite data at the site (118.7 掳EK32.2 掳N) are 0.455U 0.289 掳N, respectively, and the AOD values of March 6 are 0.373U 0.267U 0.25N, respectively. By comparing and analyzing the multi-day data from March to September, we can find that the AOD obtained from the three kinds of data calculation is not different, which shows that the inversion data of satellite and lidar are relatively reliable. Among them, the solar photometer data of March 3 and March 6 show that there are two types of AOD variation in the observed area: one is high in the morning and the evening in the morning, the other is the low in the morning and the high in the late. In addition, the data obtained by lidar vary greatly with time, and aerosol can be detected under the condition of cloud weather. In this paper, most of the AOD values below 9 km calculated by lidar data are about 0. 3, and less than 2 km in March 3 and March 6. Some aerosol layers above 6 km are relatively clean. There are clouds above 6 km in some periods. Although the time resolution of satellite is low compared with ground-based observation, it has an absolute advantage for large area trend analysis. In the future aerosol observation and development, combined with the advantages of the three, it is helpful to retrieve the spatial distribution of atmospheric aerosol with high accuracy and large area, and obtain more accurate aerosol parameters.
【作者单位】：南京信息工程大学气溶胶与云降水物理重点实验室;中国气象局大气成分观测与服务中心;
【基金】：国家自然科学基金(编号:41375044/D0503,41175033/D0503)~~
【分类号】：X513;X831

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