Quantifying Drift and Bias of Ozone Measurements from the Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP) in Upper Troposphere and Lower Stratosphere (UTLS)

By detailed comparisons with ozonesonde data from the Harmonization and Evaluation of Ground Based Instruments for Free Tropospheric Ozone Measurements (HEGIFTOM) and other satellite data sets (e.g. MLS), we analyzed the accuracy and stability of the satellite ozone measurements from Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP). We analyzed the bias and drift of OMPS-LP version 2.5 data in both geometric and tropopause-relative coordinates. The comparisons show temporal and altitude- and latitude-dependent variations, especially in the extratropical upper troposphere and lower stratosphere (UTLS), where a clear negative drift of ~-5 to -10%/decade is found. The comparisons will also be applied to newly-released version 2.6 OMPS-LP data, with the ultimate goal to improve the quality of homogenized datasets with OMPS-LP incorporated (e.g. SWOOSH) through bias and drift characterization and correction.