Indexed by:期刊论文

Date of Publication:2018-06-01

Journal:SENSORS

Included Journals:PubMed、SCIE

Volume:18

Issue:6

ISSN No.:1424-8220

Key Words:lidar; remote sensing and sensors; air pollution monitoring; aerosol detection; diode lasers

Abstract:In past decades, lidar techniques have become main tools for atmospheric remote sensing. However, traditional pulsed lidar systems are relatively expensive and require considerable maintenance. These shortcomings may be overcome by the development of a blue band Scheimpflug lidar system in Dalian, Northern China. Atmospheric remote measurements were carried out for 10 days in an urban area to validate the feasibility and performance of a 450-nm Scheimpflug lidar system. A 24-h continuous measurement was achieved in winter on a near horizontal path with an elevation angle of about 6.4 degrees. The aerosol extinction coefficient retrieved by the Fernald-inversion algorithm shows good agreement with the variation of PM10/PM2.5 concentrations recorded by a national pollution monitoring station. The experimental result reveals that the linear ratio between the aerosol extinction coefficient and the PM10 concentration under high relative humidity (75-90%) is about two-times that in low relative humidity (75%) when the PM10 concentrations are less than 100 mu g/m(3).