科罗拉多州东南部气溶胶光学特性的联合弹性侧向散射激光雷达和拉曼激光雷达测量
Joint Elastic Side-Scattering Lidar and Raman Lidar Measurements of Aerosol Optical Properties in South East Colorado
摘要：
我们描述了一个实验，位于美国科罗拉多州东南部，使用两个激光雷达技术测量气溶胶光学深度剖面。两个独立的检测器测量来自垂直UV激光束的散射光。一个探测器，位于激光站点，测量光通过非弹性拉曼背散射过程。这是大气科学中测量气溶胶光学厚度剖面的常用方法。另一个探测器位于大约40公里远的地方，从侧面观察激光束。该探测器配备了一个3.5平方米的镜子，并按照皮埃尔·奥杰宇宙射线天文台使用的方法，在双基地激光雷达配置中测量弹性散射光。该实验的目的是评估和改进测量大气透明度的方法，特别是气溶胶光学深度剖面，用于将大气用作巨大热量计的宇宙射线紫外荧光探测器。该实验收集了2010年9月至2011年7月在不同气溶胶负载条件下的数据。我们描述了仪器和技术，并比较了气溶胶光学厚度的拉曼和双基地激光雷达探测器测量。
英文摘要：
We describe an experiment, located in south-east Colorado, USA, that measured aerosol optical depth profiles using two Lidar techniques. Two independent detectors measured scattered light from a vertical UV laser beam. One detector, located at the laser site, measured light via the inelastic Raman backscattering process. This is a common method used in atmospheric science for measuring aerosol optical depth profiles. The other detector, located approximately 40km distant, viewed the laser beam from the side. This detector featured a 3.5m2 mirror and measured elastically scattered light in a bistatic Lidar configuration following the method used at the Pierre Auger cosmic ray observatory. The goal of this experiment was to assess and improve methods to measure atmospheric clarity, specifically aerosol optical depth profiles, for cosmic ray UV fluorescence detectors that use the atmosphere as a giant calorimeter. The experiment collected data from September 2010 to July 2011 under varying conditions of aerosol loading. We describe the instruments and techniques and compare the aerosol optical depth profiles measured by the Raman and bistatic Lidar detectors.
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