Atmospheric Chemistry and Physics Discussions
www.atmos-chem-phys-discuss.net
1680-7367
1680-7375
7
3
2007
10.5194/acpd-7-9093-2007
http://www.atmos-chem-phys-discuss.net/7/9093/2007/
http://www.atmos-chem-phys-discuss.net/7/9093/2007/acpd-7-9093-2007.html
http://www.atmos-chem-phys-discuss.net/7/9093/2007/acpd-7-9093-2007.pdf
9093
9113
2007-06-26
Recipe for continuous monitoring of total ozone with a precision of around 1 DU applying mid-infrared solar absorption spectra
M. Schneider
matthias.schneider@imk.fzk.de
F. Hase
IMK-ASF, Forschungszentrum Karlsruhe, Karlsruhe, Germany
Mid-infrared solar absorption spectra recorded by a state-of-the-art
ground-based FTIR system have the potential to provide precise total
O<sub>3</sub> amounts. The currently best-performing retrieval
approaches use a combination of small and broad spectral O<sub>3</sub>
windows between 780 and 1015 cm<sup>−1</sup>. 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 O<sub>3</sub> 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 O<sub>3</sub> amounts with a
precision of around 1 DU, placing this method among the
most precise ground-based O<sub>3</sub> monitoring techniques. We
recapitulate the requirements on instrumental hardware and retrieval
necessary to achieve this high precision.
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Stiller, G P. (Editor) with contributions from T v Clarmann, A Dudhia, G Echle, B Funke, N Glatthor, F Hase, M Höpfner, S Kellmann, H Kemnitzer, M Kuntz, A Linden, M Linder, G P Stiller, S Zorn: The Karlsruhe Optimized and Precise Radiative transfer Algorithm (KOPRA), Forschungszentrum Karlsruhe, Wissenschaftliche Berichte, Bericht Nr. 6487, 2000.
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