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Recipe for continuous monitoring of total ozone with a precision of around 1 DU applying mid-infrared solar absorption spectra
IMK-ASF, Forschungszentrum Karlsruhe, Karlsruhe, Germany
Abstract. Mid-infrared solar absorption spectra recorded by a state-of-the-art ground-based FTIR system have the potential to provide precise total O3 amounts. The currently best-performing retrieval approaches use a combination of small and broad spectral O3 windows between 780 and 1015 cm−1. We show that for these approaches uncertainties in the temperature profile are by far the major error sources. We demonstrate that a joint optimal estimation of temperature and O3 profiles widely eliminates this error. The improvements are documented by an extensive theoretical error estimation. Our results suggest that mid-infrared FTIR measurements can provide total O3 amounts with a precision of around 1 DU, placing this method among the most precise ground-based O3 monitoring techniques. We recapitulate the requirements on instrumental hardware and retrieval necessary to achieve this high precision.
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Citation: Schneider, M. and Hase, F.: Recipe for continuous monitoring of total ozone with a precision of around 1 DU applying mid-infrared solar absorption spectra, Atmos. Chem. Phys. Discuss., 7, 9093-9113, 2007. Bibtex EndNote Reference Manager
