Doppler Lidar Retrieval of Particulate Matter Concentration Based on Statistical Regression Method
ACTA PHOTONICA SINICA（2021）
中国海洋大学
Abstract
From September to October 2010, the coherent Doppler lidar observed and retrieved PM2.5, PM10 particulate concentrations in a joint observation campaign conducted at Shiyan (113.9 degrees E, 22.7 degrees N) of Shenzhen. Statistical regression analyzed the retrieval with lidar backscattering intensity and synchronized hybrid ambient real-time particulate monitor measurements from different heights of meteorological tower. Correlation coefficients of PM2.5, PM10 particulate concentrations intercomparisons between Mar and monitor reach more than 0.8 and that of PM2.5 is better. Hygroscopic growth factor analysis shows large particles of 2.5 mu m similar to 10 mu m at 120 m and 220 m heights may have stronger hygroscopicity, while it is opposite for those at 70m height. Particle concentration inversion and intercomparison prove that Doppler lidar can be used to observe particle concentration.
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Key words
Doppler PM2.5 concentration,PM10 concentration,Regression analysis method
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