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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/amt-2017-89
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
27 Apr 2017
Review status
This discussion paper is under review for the journal Atmospheric Measurement Techniques (AMT).
The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method
Tilman Hüneke1, Oliver-Alex Aderhold1, Jannik Bounin1, Marcel Dorf1,2, Eric Gentry1,a, Katja Grossmann1,b, Jens-Uwe Grooß3, Peter Hoor4, Patrick Jöckel5, Mareike Kenntner1,5, Marvin Knapp1, Matthias Knecht1, Dominique Lörks1, Sabrina Ludmann1,c, Rasmus Raecke1, Marcel Reichert1, Jannis Weimar1,d, Bodo Werner1, Andreas Zahn6, Helmut Ziereis5, and Klaus Pfeilsticker1 1Institut für Umweltphysik, University of Heidelberg, Heidelberg, Germany
2Max-Planck-Institute for Chemistry, Mainz, Germany
3Forschungszentrum Jülich, Institute of Energy and Climate Research – Stratosphere (IEK-7), Jülich, Germany
4Institut für Physik der Atmosphäre, University of Mainz, Mainz, Germany
5Deutsches Zentrum für Luft- und Raumfahrt, Institut für die Physik der Atmosphäre, Oberpfaffenhofen, Germany
6Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research, Karlsruhe, Germany
anow at: Department of Astronomy and Astrophysics, University of California Santa Cruz, Santa Cruz, California, USA
bnow at: Joint Institute For Regional Earth System Science and Engineering (JIFRESSE), University of California Los Angeles, Los Angeles, California, USA
cnow at: Ifeu – Institut für Energie- und Umweltforschung Heidelberg GmbH, Heidelberg, Germany
dnow at: Physikalisches Institut, University of Heidelberg, Heidelberg, Germany
Abstract. We report on a novel 6 channel optical spectrometer (further on called mini-DOAS instrument) for aircraftborne nadir and limb measurements of atmospheric trace gases, liquid and solid water, and spectral radiances in the UV/vis and nearIR spectral ranges. The spectrometer was developed for measurements from aboard the HALO (http://www.halo.dlr.de/) research aircraft during dedicated research missions. Here we report on the relevant instrumental details and the novel scaling method used to infer the mixing ratios of UV/vis absorbing trace gases from their absorption measured in limb geometry. The uncertainties of the scaling method are assessed for NO2 and BrO measurements. Some first results are reported along with complementary measurements and comparisons with model predictions for a selected HALO research flight from Cape Town to Antarctica, which was performed during the research mission ESMVal on 13 September 2012.

Citation: Hüneke, T., Aderhold, O.-A., Bounin, J., Dorf, M., Gentry, E., Grossmann, K., Grooß, J.-U., Hoor, P., Jöckel, P., Kenntner, M., Knapp, M., Knecht, M., Lörks, D., Ludmann, S., Raecke, R., Reichert, M., Weimar, J., Werner, B., Zahn, A., Ziereis, H., and Pfeilsticker, K.: The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-89, in review, 2017.
Tilman Hüneke et al.
Tilman Hüneke et al.
Tilman Hüneke et al.

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Short summary
The manuscript describes a novel instrument for the aircraft-borne remote sensing of trace gases and liquid and solid water. Until recently, such measurements could only be evaluated under clear sky conditions. This manuscript presents a characterization and error assessment of the novel "scaling method", which allows for the retrieval of absolute trace gas concentrations under all sky conditions, significantly expanding the applicability of such measurements to study atmospheric photochemistry.
The manuscript describes a novel instrument for the aircraft-borne remote sensing of trace gases...
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