Measurement of the global surface reflectance at 1572 nm using spaceborne aerosol and carbon dioxide detection lidar

This study employs the Aerosol and Carbon dioxide Detection Lidar (ACDL) instrument on the Atmospheric Environment Monitoring Satellite to measure the global surface reflectance at 1572 nm. The ACDL utilizes the integrated path differential absorption method at this wavelength for atmospheric carbon dioxide column concentration measurements, with the ground echo signals providing additional data on surface reflectance. The results are compared with those derived from the MOD09CMG dataset with a correlation coefficient of 91.71%. The global surface reflectance results reveal seasonal and geographical variations. The highest reflectance values were observed in the Sahara Desert, while icy regions such as Antarctica exhibited lower reflectance. Analysis of different terrain types, including water bodies, glaciers, and bare land, showed distinct reflectance characteristics influenced by factors such as wind speed, elevation, and seasonality. The results are important for the development and performance evaluation of the integrated path differential absorption (IPDA) Lidar or laser altimeter at 1.6 μm in the future.