Synergy between middle atmospheric temperature profiles obtained by way of ground-based lidar and satellite-borne limb scanners: An assessment based on a comparison of 16 years of coincident measurements
Robin Wing1, Alain Hauchecorne1, Philippe Keckhut1, Sophie Godin-Beekman1, Sergey Khaykin1, and Emily McCullough2
1 LATMOS/IPSL, UVSQ Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, France
2 Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada
We will show the results of a comparison study conducted using middle atmospheric temperature profiles derived from limb viewing satellites (SABER and MLS) and temperature profiles measured by the lidars at OHP (44°N, 6°E). The comparison involves 2433 coincident temperature profiles measured between January 2002 and March 2018 in the geographic region surrounding OHP. We have found significant systematic biases between the space-borne and ground-based temperatures measurements in both altitude and over time. In particular, we have found a strong seasonal bias of the winter stratopause height and temperature. This bias has a magnitude of -6 K for the lidar-SABER comparison and -17 K for the lidar-MLS comparison. By using the ranging information from the lidar to correct the satellite geopotential heights near the stratopause, we were able to reduce the magnitude of the observed bias by 5 K in the SABER comparison and 4 K in the MLS comparison.