Research And Design Of Multi-wavelength-Polarization-Raman Lidar System

Aerosol and water vapor are important components in the atmosphere,they have importan effects for the atmospheric energy conversion and formation of climate,the aerosol plays a key role in the radiation budget balance between the atmosphere and the earth,while water vapor directly affects rainfall and other weather conditions.In order to further research aerosol optical properties and water vapor content in the atmosphere,according to the of aerosol Mie scattering property and Raman scattering principle,a all-time six channels multi wavelength polarization Raman lidar were developed in Beifang University of Nationalities,except 1064,532 and 355 nm Mie scattering channels,which increase a polarization channel for 532 nm return signal,and have 660 nm water vapor channel and 607 nm nitrogen detection channel.Some experiments have been carried out and 6 channels return signal were detected,by inversion algorithm the extinction coefficient profiles of three Mie channels,?ngstr?m index,depolarization ratio profiles and water vapor mixing ratio profile were obtained,respectively.The polarization characteristics and water vapor content of cirrus were analyzed;also the polarization characteristics of dust weather situation and the water vapor profiles of three seasons are analyzed,respectively.The experiment results show that the lidar has the all-time detection ability for the aerosol optical properties and water vapor profiles of atmosphere,which realizes the real-time measurement for atmospheric aerosol and water vapor over Yinchuan area and provides important reference value for the environment quality and climate change.