光学学报, 2013, 33 (6): 0628002, 网络出版: 2013-05-14
夫琅禾费暗线激光雷达探测青岛市郊大气边界层
Atmospheric Boundary Layer Detected by a Fraunhofer Lidar over Qingdao Suburb
遥感 激光雷达 夫琅禾费暗线 消光系数 Fernald方法 remote sensing lidar Fraunhofer dark lines extinction coefficient Fernald method
摘要
激光雷达通过接收微弱的回波信号进行大气探测,具有高时空分辨率等优点,但由于受到强烈太阳背景光的影响,激光雷达白天探测的信噪比提高受到限制,难以对大气物理参数及大气边界层进行全天时同等性能观测。针对此问题,研制了一种新波长、工作在夫琅禾费暗线下的光子计数激光雷达,进而利用夫琅禾费光子计数激光雷达对青岛市郊的大气边界层进行观测实验。发射激光选取太阳暗线波长,激光雷达白天探测的信噪比提高了2~3倍,昼夜探测性能相当。由探测数据反演得到的消光系数显示了2011年夏季青岛郊区大气边界层气溶胶的垂直分布结构特征。
Abstract
Lidar with high spatial and temporal resolution detects atmospheric parameters by receiving the echo signal signal. Because of the disturbance of strong solar background light, the signal-to-noise ratio (SNR) of lidar in the daytime is greatly restricted so that the atmospheric parameters and characteristics of the atmospheric boundary layer are hardly observed with consistent quality through day and night. The photon counting lidar prototype in Fraunhofer dark lines is devised to solve this problem. The atmospheric boundary layer of Qingdao suburb is observed using the lidar. The SNR is improved 2~3 times by operating the lidar at the wavelength of solar dark lines. The extinction coefficient obtained by inversion of the detected data illustrates the vertical structures of aerosol in the atmospheric boundary over Qingdao suburb during summer 2011.
张薇, 吴松华, 宋小全, 靳磊. 夫琅禾费暗线激光雷达探测青岛市郊大气边界层[J]. 光学学报, 2013, 33(6): 0628002. Zhang Wei, Wu Songhua, Song Xiaoquan, Jin Lei. Atmospheric Boundary Layer Detected by a Fraunhofer Lidar over Qingdao Suburb[J]. Acta Optica Sinica, 2013, 33(6): 0628002.