Authors: Philippe Keckhut, Alain Hauchecorne, Sergey Khaykin, Robin Wing et al.

Monitoring mesospheric temperatures from the ground is performed at a reduced number of lidar sites. Even if trends, derived from lidar series, benefit to an auto-calibrated method, on decadal scales, instrumental changes need to be monitor, or to use 2 collated instruments. On a global scale, satellites providing temperature in the mesosphere, had a limited time of operation and small overlap periods, provide different techniques and may also experience drifts and calibration issues.

Even if not forecasted initially, scattering satellite measurements offer a good opportunity to provide global temperature measurements. To insure global calibration the synergy of ground based and satellite series can be very useful.

Tidal issue is the main problem to derive mesospheric trends. The CAWSES (Climate And Weather of the Sun-Earth System) project propose by the SCOSTEP’s interdisciplinary program has organized tidal measurements through a coordinated world campaign. Comparisons between observations and models reveal a differences of a factor of 2.

While new data sets appear it will be useful to organize à new campaign.