论文标题
通过人为Skyglow的差分光度法对下大气的气溶胶含量进行夜间监测
Nighttime monitoring of the aerosol content of the lower atmosphere by differential photometry of the anthropogenic skyglow
论文作者
论文摘要
夜间监测较低气氛的气溶胶含量是一项艰巨的任务，因为缺乏适当的参考自然光源。在这里，我们表明，由于城市灯光引起的人为夜空亮度可以成功地用于估计任意厚的大气层的气溶胶光学深度。此方法需要测量顶峰夜空亮度，其中两个探测器位于极限层高度。结合对整个大气光学深度的估计（可从地面测量或特定的卫星产品获得），这些辐射的比率可直接估计这两个高度之间空气柱的差分气溶胶光学深度。这些测量可以通过光污染研究界广泛使用的单渠道低成本辐射探测器进行。
Nighttime monitoring of the aerosol content of the lower atmosphere is a challenging task, because appropriate reference natural light sources are lacking. Here we show that the anthropogenic night sky brightness due to city lights can be successfully used for estimating the aerosol optical depth of arbitrarily thick atmospheric layers. This method requires measuring the zenith night sky brightness with two detectors located at the limiting layer altitudes. Combined with an estimate of the overall atmospheric optical depth (available from ground-based measurements or specific satellite products), the ratio of these radiances provides a direct estimate of the differential aerosol optical depth of the air column between these two altitudes. These measurements can be made with single-channel low-cost radiance detectors widely used by the light pollution research community.
