Four months (January, April, July and October, 2007) of the cloud-aerosol lidar and infrared path finder statellite observations (CALIPSO) lidar 532 nm cloud-free nighttime L1 data (Version 3.01) are used to derive sea surface backscattering coefficient and calculate sea surface mean square wave slope. The collocated AMSR-E sea surface wind speed data are used to calculate air-sea gas transfer velocity at a Schmidt number of 660 using a hybrid model, containing mixed relation between sea surface wind speed with linear, quadratic and cubic terms and gas transfer relocity, proposed by Wanninkhof et al. in 2009. Based on regression analysis, an improved expression for estimating the air-sea gas transfer velocity using satellite lidar measurements is derived and presented. Air-sea gas transfer velocities derived from the CALIPSO lidar data are then compared with that computed from four typical wind speed-transfer velocity relations using the collocated AMSR-E sea surface wind speed data. Global and latitudinal distributions of air-sea gas transfer velocity derived from the four months of CALIPSO lidar data are presented. The results show that the CALIPSO lidar 532 nm single shot data can be used to estimate air-sea gas transfer velocity.