Data Assimilation Based Validation of MIPAS Ozone at the Global Modeling and Assimilation Office

Details Data Assimilation Based Validation of MIPAS Ozone at the Global Modeling and Assimilation Office Data Assimilation Based Validation of MIPAS Ozone at the Global Modeling and Assimilation Office

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.562e..52w&link_type=abstract

Proceedings of the Second Workshop on the Atmospheric Chemistry Validation of ENVISAT (ACVE-2), 3-7 May 2004, ESA-ESRIN, Frascat

Computer Science

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Scientific paper

This study presents validation of ozone data from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard the Environmental Satellite (Envisat). Our approach utilizes an online Ozone Data Assimilation System (ODAS) developed at NASA's Global Modeling and Assimilation Office (GMAO). We added assimilation of MIPAS ozone data to this system that already uses Solar Backscattered Ultraviolet/2 (SBUV/2) ozone data. Impacts of including MIPAS data in the ODAS are evaluated against independent observations from satellite-borne occultation instruments. We show that stratospheric impacts of MIPAS data are generally positive during the period covered (from September to November 2002). Both the superior vertical resolution and the additional night time coverage of MIPAS relative to SBUV bring the largest improvements in the analyses. The improvements are seen in the lower stratosphere in the northern high latitudes, with a substantially improved mean profile shape. Comparisons of MIPAS analyzed ozone with independent measurements reveal that the analysis overestimates the ozone values between 100 hPa and 70 hPa in the southern high latitudes

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