OMPS Limb-Nadir Matching tropospheric ozone dataset

Download link: OMPS-LNM dataset (2012-2018) 

Figure caption. OMPS 2012-2018 tropospheric ozone column (TrOC) in DU. SAA stands for South Atlantic Anomaly an anomaly in the earth's magnetic field perturbing the ozone retrieval. From Orfanoz-Cheuquelaf et al. (2024).

References

• Orfanoz-Cheuquelaf, A., Arosio, C., Rozanov, A., Weber, M., Ladstätter-Weißenmayer, A., Burrows, J. P., Thompson, A. M., Stauffer, R. M., and Kollonige, D. E.: Tropospheric ozone column dataset from OMPS-LP/OMPS-NM limb-nadir matching, Atmos. Meas. Tech., 17, 1791-1809, https://doi.org/10.5194/amt-17-1791-2024, 2024.

Abstract

A tropospheric ozone column (TrOC) dataset from the Ozone Mapping and Profiler Suite (OMPS) observations was generated by combining the retrieved total ozone column from OMPS – Nadir Mapper (OMPS-NM) and limb profiles from OMPS – Limb Profiler (OMPS-LP) data. All datasets were generated at the University of Bremen, and the TrOC product was obtained by applying the limb–nadir matching technique (LNM). The retrieval algorithm and a comprehensive analysis of the uncertainty budget are presented here. The OMPS-LNM-TrOC dataset (2012–2018) is analysed and validated through comparison with ozonesondes, tropospheric ozone residual (TOR) data from the combined Ozone Monitoring Instrument/Microwave Limb Sounder (OMI/MLS) observations, and the TROPOspheric Monitoring Instrument (TROPOMI) Convective Cloud Differential technique (CCD) dataset. The OMPS-LNM TrOC is generally lower than the other datasets. The average bias with respect to ozonesondes is -1.7 DU with no significant latitudinal dependence identified. The mean difference with respect to OMI/MLS TOR and TROPOMI CCD is -3.4 and -1.8 DU, respectively. The seasonality and inter-annual variability are in good agreement with all comparison datasets.