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大气气溶胶和卷云对地球-大气之间辐射收支平衡有重要的影响,主要表现在它们的直接气候效应、间接气候效应以及它们之间的相互作用。为了深入研究大气气溶胶的微物理特性和卷云的物理性质,开发研制了三波长拉曼偏振激光雷达系统,它由发射、接收、控制与数据采集子系统组成。该激光雷达系统具有探测波长多、探测范围大、时间和空间分辨率高、灵敏度高和数据可靠等特点。由该激光雷达的数据可以反演355、532、1064nm 3个波长上的后向散射系数,355nm和532nm两个波长上的消光系数以及532nm波长上的退偏振比。个例研究结果表明该激光雷达系统数据可靠、可以对气溶胶和卷云进行微物理性质的探测研究。
Atmospheric aerosols and cirrus clouds have a major impact on the Earth’s atmosphere-the balance of radiation between the atmosphere, mainly due to their direct climate effects, indirect climate effects and their interactions. In order to further study the micro-physical properties of aerosol and the physical properties of cirrus, a three-wavelength Raman polarization laser radar system is developed. It consists of transmitting, receiving, controlling and data acquisition subsystems. The laser radar system with a detection wavelength, detection range, high temporal and spatial resolution, high sensitivity and data reliability and so on. Backscattering coefficients at 355, 532, and 1064 nm wavelength, extinction coefficients at 355 nm and 532 nm, and depolarization ratios at 532 nm wavelength can be inverted by the lidar data. The results of a case study show that the Lidar system has reliable data and can be used to probe the micro-physical properties of aerosols and cirrus clouds.