Investigation of three-dimensional radiative transfer effects for UV–Vis satellite and ground-based observations of volcanic plumes by T. Wagner, S. Warnach, S. Warnach, S. Beirle, N. Bobrowski, N. Bobrowski, A. Jost, J. Puķīte, N. Theys

“…Besides the atmospheric radiative transfer, the saturation effect also affects the spectral retrievals. …”
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Three-dimensional simulation of the Ring effect in observations of scattered sun light using Monte Carlo radiative transfer models by T. Deutschmann, S. Beirle, T. Wagner

“…The method is based on radiative transfer calculations at only one wavelength λ<sub>0</sub> in the wavelength range under consideration, and is thus computationally fast. …”
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Is a scaling factor required to obtain closure between measured and modelled atmospheric O₄ absorptions? An assessment of uncertainties of measurements and radiative transfer simulations for 2 selected days during the MAD-CAT campaign by T. Wagner, S. Beirle, N. Benavent, T. Bösch, K. L. Chan, S. Donner, S. Dörner, C. Fayt, U. Frieß, D. García-Nieto, C. Gielen, C. Gielen, D. González-Bartolome, L. Gomez, F. Hendrick, B. Henzing, J. L. Jin, J. Lampel, J. Ma, K. Mies, M. Navarro, E. Peters, E. Peters, G. Pinardi, O. Puentedura, J. Puķīte, J. Remmers, A. Richter, A. Saiz-Lopez, R. Shaiganfar, H. Sihler, M. Van Roozendael, Y. Wang, M. Yela

“…This study has three main goals: first all relevant error sources of the spectral analysis, the radiative transfer simulations and the extraction of the input parameters used for the radiative transfer simulations are quantified. …”
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A new method for the absolute radiance calibration for UV–vis measurements of scattered sunlight by T. Wagner, S. Beirle, S. Dörner, M. Penning de Vries, J. Remmers, A. Rozanov, R. Shaiganfar

“…The radiative transfer simulations have to take polarisation into account. …”
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A sensitivity analysis of Ring effect to aerosol properties and comparison to satellite observations by T. Wagner, S. Beirle, T. Deutschmann, M. Penning de Vries

“…Compared to clouds, aerosols have a rather weak influence on the Ring effect, thus the requirements on the accuracy of the measurements and the radiative transfer simulations are high. In this study, we show that for moderate and high aerosol optical depth (AOD), Ring effect observations are sensitive enough to yield information not only on the AOD, but also on the absorbing properties of aerosols and the aerosol layer height. …”
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MAX-DOAS detection of glyoxal during ICARTT 2004 by R. Sinreich, R. Volkamer, R. Volkamer, F. Filsinger, F. Filsinger, U. Frieß, C. Kern, U. Platt, O. Sebastián, T. Wagner, T. Wagner

“…For a day with nearly clear sky conditions, radiative transfer modeling was employed to derive diurnal CHOCHO mixing ratios in the planetary boundary layer (PBL) for both sites. …”
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Occurrence of polar stratospheric clouds as derived from ground-based zenith DOAS observations using the colour index by B. Lauster, B. Lauster, S. Dörner, C.-F. Enell, U. Frieß, M. Gu, J. Puķīte, U. Raffalski, T. Wagner

“…For a comprehensive interpretation of the measurement data, the well-established radiative transfer model McArtim is used and radiances of scattered sunlight are simulated at several wavelengths for different solar zenith angles and various atmospheric conditions. …”
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Enhanced tropospheric BrO over Antarctic sea ice in mid winter observed by MAX-DOAS on board the research vessel Polarstern by T. Wagner, O. Ibrahim, R. Sinreich, U. Frieß, R. von Glasow, U. Platt

“…Our observations indicate that enhanced BrO concentrations around Antarctica exist about one month earlier than observed by satellite instruments. From detailed radiative transfer simulations we find that MAX-DOAS observations are up to about one order of magnitude more sensitive to near-surface BrO than satellite observations. …”
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A research product for tropospheric NO₂ columns from Geostationary Environment Monitoring Spectrometer based on Peking University OMI NO₂ algorithm by Y. Zhang, J. Lin, J. Kim, H. Lee, J. Park, H. Hong, M. Van Roozendael, F. Hendrick, T. Wang, T. Wang, P. Wang, P. Wang, Q. He, K. Qin, Y. Choi, Y. Kanaya, J. Xu, P. Xie, P. Xie, X. Tian, S. Zhang, S. Wang, S. Cheng, X. Cheng, J. Ma, T. Wagner, R. Spurr, L. Chen, H. Kong, M. Liu

“…We then derive tropospheric <span class="inline-formula">NO₂</span> air mass factors (AMFs) with explicit corrections for surface reflectance anisotropy and aerosol optical effects through parallelized pixel-by-pixel radiative transfer calculations. Prerequisite cloud parameters are retrieved with the <span class="inline-formula">O₂</span>–<span class="inline-formula">O₂</span> algorithm by using ancillary parameters consistent with those used in <span class="inline-formula">NO₂</span> AMF calculations.…”
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