Pulsed airborne lidar measurements of atmospheric CO2column absorption

James B. Abshire, Haris Riris, Graham R. Allan, Clark J. Weaver, Jianping Mao, Xiaoli Sun, William E. Hasselbrack, S. Randoph Kawa, Sebastien Biraud
2010 Tellus: Series B, Chemical and Physical Meteorology  
A B S T R A C T We report initial measurements of atmospheric CO 2 column density using a pulsed airborne lidar operating at 1572 nm. It uses a lidar measurement technique being developed at NASA Goddard Space Flight Center as a candidate for the CO 2 measurement in the Active Sensing of CO 2 Emissions over Nights, Days and Seasons (ASCENDS) space mission. The pulsed multiple-wavelength lidar approach offers several new capabilities with respect to passive spectrometer and other lidar
more » ... her lidar techniques for high-precision CO 2 column density measurements. We developed an airborne lidar using a fibre laser transmitter and photon counting detector, and conducted initial measurements of the CO 2 column absorption during flights over Oklahoma in December 2008. The results show clear CO 2 line shape and absorption signals. These follow the expected changes with aircraft altitude from 1.5 to 7.1 km, and are in good agreement with column number density estimates calculated from nearly coincident airborne in-situ measurements.
doi:10.3402/tellusb.v62i5.16633 fatcat:oc43mxp7dzbvnosuyt667yjdkm