Temperature dependent ozone absorption cross section spectra measured with the GOME-2 FM3 spectrometer and first application in satellite retrievals

[摘要] The Global Ozone Monitoring Experiment-2 (GOME-2) Flight Model (FM)absorption cross section spectra of ozone were measured under representativeatmospheric conditions in the laboratory setup at temperatures between 203 Kand 293 K in the wavelength range of 230–790 nm at a medium spectralresolution of 0.24 to 0.54 nm. Since the exact ozone amounts were unknown inthe gas flow system used, the measured ozone cross sections were required tobe scaled to absolute cross section units using published literature data.The Hartley, Huggins and Chappuis bands were recorded simultaneously andtheir temperature dependence is in good agreement with previous studies(strong temperature effect in the Huggins band and weak in the Hartley andChappuis bands). The overall agreement of the GOME-2 FM cross sections withthe literature data is well within 3%. The total ozone column retrievedfrom the GOME-2/MetOp-A satellite using the new cross section data is within1% compared to the ozone amounts retrieved from the standard retrievalperformed for GOME-2.

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