Global Ocean Studies from CALIOP/CALIPSO by Removing Polarization Crosstalk Effects

Recent studies indicate that the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard and Infrared Pathfinder Satellite Observations (CALIPSO) satellite provides valuable information about ocean phytoplankton distributions. CALIOP’s attenuated backscatter coefficients, measured at 532 nm in receiver channels oriented parallel perpendicular to laser’s linear polarization plane, are significantly improved Version 4 data product. However, due non-ideal instrument effects, a small fraction of backscattered optical power polarized reference plane is misdirected into channel, vice versa. This effect, known as crosstalk, typically causes signal be higher than its true value lower value. Therefore, properties derived directly from signals will biased if crosstalk effect not taken account. paper presents methods can used estimate CALIOP effects on-orbit measurements. The global depolarization ratios calculated both before after removing compared. Using crosstalk-corrected highly recommended for all subsurface studies.