Indirect Validation of the OMPS Limb Profile Ozone Retrievals
Abstract
The Ozone Mapping Profiler Suite Limb profiler (OMPS-L) was launched in October 2011 onboard the Suomi NPP satellite, and provides ozone profiles from cloud top to 55 km. In this study, we estimate OMPS-L mean and seasonal biases through an indirect validation. The Real-time Air Quality Modeling System (RAQMS) Aura reanalysis is used as a transfer standard through which ozonesondes and Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) ozone retrievals are compared to OMPS-L retrievals between 2012 and 2016. A bias correction to RAQMS-Aura is calculated as the median deviation of RAQMS-Aura from ACE-FTS between 2006 and 2016. RAQMS-Aura average bias below the tropopause is determined through comparison with ozonesondes. Sampling of the corrected RAQMS-Aura is performed within 1° latitude and longitude and ±1.5 hours of an OMPS-L retrieval. We find the zonal mean bias in OMPS-L to be within ±10% between 20 and 50 km. A large positive bias in excess of 20% is found for the tropics below 20 km. Analysis of the seasonal cycle in OMPS-L and coincident RAQMS-Aura indicates enhanced seasonal variation in the OMPS-L retrievals. The results of this study are generally consistent with results from previous direct validation using the Aura Microwave Limb Sounder.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.A23I2886B
- Keywords:
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- 0394 Instruments and techniques;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0399 General or miscellaneous;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3394 Instruments and techniques;
- ATMOSPHERIC PROCESSES;
- 1990 Uncertainty;
- INFORMATICS