Tomographic retrievals of ozone with the OMPS Limb Profiler: algorithm description and preliminary results
Abstract. Measurements of limb-scattered sunlight from the Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP) can be used to
obtain vertical profiles of ozone in the stratosphere. In this paper we describe a two-dimensional, or tomographic,
retrieval algorithm for OMPS-LP where variations are retrieved simultaneously in altitude and the along-orbital-track
dimension. The algorithm has been applied to measurements from the center slit for the full OMPS-LP mission to create the
publicly available University of Saskatchewan (USask) OMPS-LP 2D v1.0.2 dataset. Tropical ozone anomalies are compared with measurements from the
Microwave Limb Sounder (MLS), where differences are less than 5 % of the mean ozone value for the majority of the
stratosphere. Examples of near-coincident measurements with MLS are also shown, and agreement at the 5 % level is
observed for the majority of the stratosphere. Both simulated retrievals and coincident comparisons with MLS are shown at
the edge of the polar vortex, comparing the results to a traditional one-dimensional retrieval. The one-dimensional
retrieval is shown to consistently overestimate the amount of ozone in areas of large horizontal gradients relative to
both MLS and the two-dimensional retrieval.