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Ozone data assimilation of GOME, SCIAMACHY and OMI measurements

Henk Eskes(1), Ronald van der A(1), Arjo Segers(1), Pieternel Levelt(1), Pepijn Veefkind(1) and Ellen Brinksma(1)

(1) KNMI, POBox 201, 3730 AE De Bilt, Netherlands

Abstract

Since 2000 the KNMI is providing operational ozone analyses and forecasts based on the assimilation of GOME and SCIAMACHY ozone measurements. These forecasts are currently coupled to UV-index and dose calculations performed in several countries. Within the context of the ESA-GSE PROMOTE project reanalysis data assimilation runs have been performed for the latest retrieval data sets available, including GDP-4 for GOME and TOSOMI for SCIAMACHY. From these combined measurements of GOME and SCIAMACHY we have compiled a consistent long-term record of total ozone fields spanning a period of 10+ years. This record will be further continued with OMI data that has recently become available, and will be extended towards the past with TOMS datasets. The overlapping periods between the instruments and the comparison with ground-based data is used to remove biases between the instruments and retrieval approaches. In our talk we will give an overview of this KNMI ozone data assimilation work, including first results for the OMI instrument.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry