Performance Of Atmospheric Extinction With A 1.06μm Lidar

Although the content of the aerosol in the air is very low, it plays a very important role. It can disturb the radiation balance of the earth-air system through absorbing and scattering the solar radiation, produces the so-called direct weather effect. It can also influence the optical characteristics, magnitude and duration of the clouds, produces the so-called indirect weather effect. These are main factors which affect the earth's climate. So it is very significant to realize the optical characteristics and typical profiles of the aerosol.We can survey the optical properties of the aerosol and the clouds with a lidar system. The system has much advantage such as strong stability, large measurement span, high resolution and long-term automatic operation. This subject is always a foreland field of the atmospheric remote sensing of laser.In this thesis, the system structure, parameters and operation principle for a 1.06m Mie lidar are presented. The solution to lidar equation for atmospheric aerosol monitoring and data processing method are described. The overlap factor Y(r) of the lidar system is calculated. In order to know the precision of the inversion better, some procedures are compiled to simulate the results and to discuss the errors. The extinction coefficient profile of aerosol and clouds above Suzhou are showed, discussed and analyzed in this thesis.