Our rooftop atmospheric observatory
Understanding the carbon cycle
Greenhouse gas emissions imaging
Volcanic carbon emissions
New remote sensing techniques
Model and satellite validation
Monitoring man-made GHG emissions
New satellite sensor for powerplant emissions

Atmosphere (Group Butz)

Our group explores the gaseous and particulate composition of the Earth's atmosphere. The main research focus is on the greenhouse gases carbon dioxide (CO2) and methane (CH4) which drive current climate change through their man-made emissions. Our goal is to better understand the anthropogenic and biogeochemical processes that control atmospheric abundances of CO2 and CH4 and other constitutents. To this end, we use and develop radiative transfer and spectroscopic remote sensing techniques that enable highly accurate measurements of greenhouse gas concentrations from satellites and ground-based platforms.


If you are interested in contributing to our research through Bachelor, Master, or Ph.D. projects, please contact us.



Understanding the carbon cycle: GOSAT measurements suggest that the seasonal and year-to-year variability of the Australian biogenic CO2 fluxes is dominated by quick CO2 release from microbial respiration at the onset of rain after the dry period (Metz et al., 2023).


Greenhouse Gas Emissions Imaging: CO2 plume of the Mannheim (GKM) coal-fired power plant measured by our hyperspectral camera operating on scattered sunlight in the shortwave infrared. The camera was placed roughly at 3 km distance from the stack. The red color coding shows CO2 enhancements above the blue sky background. Recent paper on imaging of CH4 plumes from coal mines here.


Design of new satellite sensors: Map of worldwide coal-fired powerplants with emissions color-coded (modified from Strandgren et al., 2020). We develop a new satellite sensor concept for monitoring powerplant carbon dioxide emissions (collaboration with DLR).


Verification of man-made greenhouse gas emissions: Side-by-side deployment of greenhouse gas spectrometers prior to a field campaign targeting at methane emissions from coal mines in the Upper Silesian Coal Basin (collaboration with KIT, DLR, TUM, AGH).


Volcanic carbon dioxide emissions: Field deployment of our mobile remote sensing greenhouse gas observatory at volcano Mt. Etna. We collected cross sections of the volcanic plume in about 5 km downwind distance of the craters. Our solar absorption spectroscopic technique can discriminate 0.5 ppm carbon dioxide enhancements on top of the ~400 ppm atmospheric background.


Background greenhouse gas measurements for model and satellite validation: Mobile spectrometer setup for deployments on ships and other moving platforms for validation and verification of satellite and model data. Our solar tracker is able to track the center of the solar disk to within fractions of a sun diameter under typical platform motion.


Development of innovative remote sensing techniques: Spectrum of sunlight scattered off the hills of the Odenwald measured by our new spectrometer with high light throughput and enhanced detector sensitivity. The absorption spectrum shows vibrational-rotational absorption spectra of carbon dioxide, methane, carbon monoxide, water vapor and molecular oxygen that we want to use for developing gas imaging techniques.


Prof. Dr. André Butz
Universität Heidelberg
Institut für Umweltphysik
Im Neuenheimer Feld 229 (4th floor, room 424)
69120 Heidelberg

Phone: +49 6221 54 6310
Email: andre.butz ( at )


Artelt, Lukas, cand., Bsc.
Bobrowski, Nicole, Dr., Senior scientist (now at INGV, Italy)
Butz, André, Prof. Dr., Head of group
Charuvil Asokan, Harikrishnan, Dr., postdoc
Dillerup, Ines, cand.
Enders, Vincent, cand.
Gassama, Angelika, Technician
Glauch, Theo, Dr. (with DLR)
Häffner, Lukas, Ph.D. cand.,, (with UBA)
Hägele, Johannes, cand.
Haveresch, Helge, cand.
Holzbeck, Philip, Ph.D. cand. (with MPIC), ,
Jandl, Ida, cand.
Kleinschek, Ralph, Optics engineer
Knapp, Marvin, Ph.D. cand.,
Löw, Benedikt, Ph.D. cand.,
Lüken-Winkels, Christopher,, Ph.D. cand.
Maiwald, Robert, cand.
May, Maximilian, Ph.D. cand.
Metz, Eva-Marie, Ph.D. cand.,
Pilz, Lukas, Ph.D. cand.,
Plewa, Thomas, Ph.D. cand. (with DLR)
Scheidweiler, Leon, Ph.D. cand.,,
Schmitt, Tobias, Ph.D. cand.
Sindram, Moritz, cand.,
Sommani, Anna, Ph.D. cand.
Sreekumar, Sreedev, Ph.D. cand. (with MPIC)
Voss, Karolin, Ph.D. cand.,,
Weis, Lukas, cand.

close collaboration and integration with Sanam Vardag's group on greenhouse gas simulations and Maximilian Jungmann at the Heidelberg Center for the Environment.


Alumni and theses

Külheim, Felix, (2023); Siegel, Tim-Adrian, (2023); Kraus, Simeon, (2023); Schenk, Michael, (2023); Eichmeyer Livia, project (2023); Leonie Kemeter, (2023); Paul Edinger, (2023); Max Bechtold, (2023); Carsten Schneider, (2023); Christopher Lüken-Winkels, (2023); Marvin Kriening, (2023); Lukas Häffner, (2023); Kenneth von Bünau, (2022);Leon Scheidweiler, (2022); Simone Wald, (2022); Jonathan Flunger, (2022); Karolin Voss, (2022); Philipp Holzbeck, (2022); Franziska Niedeggen, (2022); Johanna Beikert, (2022); Timo Knaack, (2022); Andreas Luther, Dr., postdoc (2021); Lena Schreiner, M. sc. (2021); Eva-Marie Schömann, (2021); Valentin Hanft, (2021); Katja Grossmann, Dr., postdoc (2021); Lukas Artelt, (2021); Axel Könekamp, (2021); Moritz Sindram, (2021),  Vincent Enders, (2021); Marcel Kern, (2021); Jonas Wilzewski, Ph.D. (at DLR) (2021); Andreas Luther, Ph.D. (at DLR) (2021); Christin, Pross, project (2021); Felix Külheim, (2021); Lukas Pilz, (2021); Felix Klein, (2021); Dominic Batzler, (2020); Robin Herlan, (2020); Mahshid Homayouni, (2020); Carolina Nelson, (2020); Michael Schenk, (2020); Constanze Wellmann, postdoc (2020); Markus Haun, (2020); Nils Roerup, (2020); Karolin Voss, (2020); Lucas Warmuth, (2020); Florian Kleinicke, (2020); Philip Holzbeck, (2019); Linus Balles, (2019); Benedikt Hemmer, (2019); Marvin Knapp, (2019); Alexander Hubig, (2019); Robin Mueller, project (2019); Blanca Fuentes, project (2019); Frederik Mayer, (2019); Soeren Rubner, (2019); Carsten Schneider, (2019); Leon Scheidweiler, (2018);


Book contributions

Reents, F., Gerhard, U., and Butz, A.: Kippen, Sich Einrichten und Deuten. Geokritische Poetiken des Anthropozän in interdisziplinärer Lesart, pages 65-85, in Dürbeck, G., Probst, S., Schaub, C. (editors), Anthropozäne Literatur Poetiken - Themen - Lektüren, ISBN 978-3-662-63898-9,, 2022.

Peer-reviewed papers

Knapp, M., Kleinschek, R., Vardag, S. N., Külheim, F., Haveresch, H., Sindram, M., Siegel, T., Burger, B. and Butz, A.: Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera, Atmos. Meas. Tech. Disc., doi:10.5194/egusphere-2023-1857, preprint, 2023.
Löw, B. A., Kleinschek, R., Enders, V., Sander, S. P., Pongetti, T. J., Schmitt, T. D., Hase, F., Kostinek, J. and Butz, A.: A portable reflected-sunlight spectrometer for CO2 and CH4, Atmos. Meas. Tech. Disc., doi:10.5194/amt-2023-101, preprint, 2023.
Müller, A., Tanimoto, H., Sugita, T., Patra, P. K., Nakaoka, S., Machida, T., Morino, I., Butz, A. and Shiomi, K.: Ship- and aircraft-based XCH4 over oceans as new tool for satellite validation, Atmos. Meas. Tech. Disc., doi:10.5194/amt-2023-144, preprint, 2023.
Schmitt, T. D., Kuhn, J., Kleinschek, R., Löw, B. A., Schmitt, S., Cranton, W., Schmidt, M., Vardag, S. N., Hase, F., Griffith, D. W. T. and Butz, A.: An open-path observatory for greenhouse gases based on near-infrared Fourier transform spectroscopy, Atmos. Meas. Tech. Disc., doi:10.5194/amt-2023-185, preprint, 2023.
Knapp, M., Scheidweiler, L., Külheim, F., Kleinschek, R., Necki, J., Jagoda, P. and Butz, A.: Spectrometric imaging of sub-hourly methane emission dynamics from coal mine ventilation, Environ. Res. Lett., 18(4), 044030, Environ. Res. Lett., doi:10.1088/1748-9326/acc346, 2023.
Metz, E.-M., Vardag, S. N., Basu, S., Jung, M., Ahrens, B., El-Madany, T., Sitch, S., Arora, V. K., Briggs, P. R., Friedlingstein, P., Goll, D. S., Jain, A. K., Kato, E., Lombardozzi, D., Nabel, J. E. M. S., Poulter, B., Séférian, R., Tian, H., Wiltshire, A., Yuan, W., Yue, X., Zaehle, S., Deutscher, N. M., Griffith, D. W. T. and Butz, A.: Soil respiration-driven CO2 pulses dominate Australia’s flux variability, Science, 379(6639), 1332–1335, doi:10.1126/science.add7833, 2023, free-access reprint.
Alberti, C., Hase, F., Frey, M., Dubravica, D., Blumenstock, T., Dehn, A., Castracane, P., Surawicz, G., Harig, R., Baier, B. C., Bès, C., Bi, J., Boesch, H., Butz, A., Cai, Z., Chen, J., Crowell, S. M., Deutscher, N. M., Ene, D., Franklin, J. E., García, O., Griffith, D., Grouiez, B., Grutter, M., Hamdouni, A., Houweling, S., Humpage, N., Jacobs, N., Jeong, S., Joly, L., Jones, N. B., Jouglet, D., Kivi, R., Kleinschek, R., Lopez, M., Medeiros, D. J., Morino, I., Mostafavipak, N., Müller, A., Ohyama, H., Palmer, P. I., Pathakoti, M., Pollard, D. F., Raffalski, U., Ramonet, M., Ramsay, R., Sha, M. K., Shiomi, K., Simpson, W., Stremme, W., Sun, Y., Tanimoto, H., Té, Y., Tsidu, G. M., Velazco, V. A., Vogel, F., Watanabe, M., Wei, C., Wunch, D., Yamasoe, M., Zhang, L. and Orphal, J.: Improved calibration procedures for the EM27/SUN spectrometers of the COllaborative Carbon Column Observing Network (COCCON), Atmospheric Measurement Techniques, 15(8), 2433–2463, doi:10.5194/amt-15-2433-2022, 2022.
Butz, A., Hanft, V., Kleinschek, R., Frey, M. M., Müller, A., Knapp, M., Morino, I., Agusti-Panareda, A., Hase, F., Landgraf, J., Vardag, S. and Tanimoto, H.: Versatile and Targeted Validation of Space-Borne XCO2, XCH4 and XCO Observations by Mobile Ground-Based Direct-Sun Spectrometers, Front. Remote Sens., 2, 775805, doi:10.3389/frsen.2021.775805, 2022.

Jungmann, M., Vardag, S. N., Kutzner, F., Keppler, F., Schmidt, M., Aeschbach, N., Gerhard, U., Zipf, A., Lautenbach, S., Siegmund, A., Goeschl, T. and Butz, A.: Zooming-in for climate action—hyperlocal greenhouse gas data for mitigation action?, Clim. Action, 1(1), 8, doi:10.1007/s44168-022-00007-4, 2022.

Lorente, A., Borsdorff, T., Martinez-Velarte, M. C., Butz, A., Hasekamp, O. P., Wu, L. and Landgraf, J.: Evaluation of the methane full-physics retrieval applied to TROPOMI ocean sun glint measurements, Atmos. Meas. Tech., 15(22), 6585–6603, doi:10.5194/amt-15-6585-2022, 2022.

Luther, A., Kostinek, J., Kleinschek, R., Defratyka, S., Stanisavljević, M., Forstmaier, A., Dandocsi, A., Scheidweiler, L., Dubravica, D., Wildmann, N., Hase, F., Frey, M. M., Chen, J., Dietrich, F., Nȩcki, J., Swolkień, J., Knote, C., Vardag, S. N., Roiger, A. and Butz, A.: Observational constraints on methane emissions from Polish coal mines using a ground-based remote sensing network, Atmos. Chem. Phys., 22(9), 5859–5876, doi:10.5194/acp-22-5859-2022, 2022.

Palmer, P. I., Woodwark, A. J. P., Finch, D. P., Taylor, T. E., Butz, A., Tamminen, J., Bösch, H., Eldering, A. and Vincent-Bonnieu, S.: Role of space station instruments for improving tropical carbon flux estimates using atmospheric data, npj Microgravity, 8(1), 51, doi:10.1038/s41526-022-00231-6, 2022.

Schneider, M., Ertl, B., Tu, Q., Diekmann, C. J., Khosrawi, F., Röhling, A. N., Hase, F., Dubravica, D., García, O. E., Sepúlveda, E., Borsdorff, T., Landgraf, J., Lorente, A., Butz, A., Chen, H., Kivi, R., Laemmel, T., Ramonet, M., Crevoisier, C., Pernin, J., Steinbacher, M., Meinhardt, F., Strong, K., Wunch, D., Warneke, T., Roehl, C., Wennberg, P. O., Morino, I., Iraci, L. T., Shiomi, K., Deutscher, N. M., Griffith, D. W. T., Velazco, V. A. and Pollard, D. F.: Synergetic use of IASI profile and TROPOMI total-column level 2 methane retrieval products, Atmos. Meas. Tech., 15(14), 4339–4371, doi:10.5194/amt-15-4339-2022, 2022.

Tu, Q., Hase, F., Schneider, M., García, O., Blumenstock, T., Borsdorff, T., Frey, M., Khosrawi, F., Lorente, A., Alberti, C., Bustos, J. J., Butz, A., Carreño, V., Cuevas, E., Curcoll, R., Diekmann, C. J., Dubravica, D., Ertl, B., Estruch, C., León-Luis, S. F., Marrero, C., Morgui, J.-A., Ramos, R., Scharun, C., Schneider, C., Sepúlveda, E., Toledano, C. and Torres, C.: Quantification of CH4 emissions from waste disposal sites near the city of Madrid using ground- and space-based observations of COCCON, TROPOMI and IASI, Atmos. Chem. Phys., 22(1), 295–317, doi:10.5194/acp-22-295-2022, 2022.

Knapp, M., Kleinschek, R., Hase, F., Agustí-Panareda, A., Inness, A., Barré, J., Landgraf, J., Borsdorff, T., Kinne, S. and Butz, A.: Shipborne measurements of XCO2, XCH4, and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI, Earth Syst. Sci. Data, 13(1), 199–211, doi:10.5194/essd-13-199-2021, 2021.

Kostinek, J., Roiger, A., Eckl, M., Fiehn, A., Luther, A., Wildmann, N., Klausner, T., Fix, A., Knote, C., Stohl, A. and Butz, A.: Estimating Upper Silesian coal mine methane emissions from airborne in situ observations and dispersion modeling, Atmos. Chem. Phys., 21(11), 8791–8807, doi:10.5194/acp-21-8791-2021, 2021.

Lorente, A., Borsdorff, T., Butz, A., Hasekamp, O., aan de Brugh, J., Schneider, A., Wu, L., Hase, F., Kivi, R., Wunch, D., Pollard, D. F., Shiomi, K., Deutscher, N. M., Velazco, V. A., Roehl, C. M., Wennberg, P. O., Warneke, T. and Landgraf, J.: Methane retrieved from TROPOMI: improvement of the data product and validation of the first 2 years of measurements, Atmos. Meas. Tech., 14(1), 665–684, doi:10.5194/amt-14-665-2021, 2021.

Suto, H., Kataoka, F., Kikuchi, N., Knuteson, R. O., Butz, A., Haun, M., Buijs, H., Shiomi, K., Imai, H. and Kuze, A.: Thermal and near-infrared sensor for carbon observation Fourier transform spectrometer-2 (TANSO-FTS-2) on the Greenhouse gases Observing SATellite-2 (GOSAT-2) during its first year in orbit, Atmos. Meas. Tech., 14(3), 2013–2039, doi:10.5194/amt-14-2013-2021, 2021.

Chang, C. Y., Guanter, L., Frankenberg, C., Köhler, P., Gu, L., Magney, T. S., Grossmann, K. and Sun, Y.: Systematic Assessment of Retrieval Methods for Canopy Far‐Red Solar‐Induced Chlorophyll Fluorescence Using High‐Frequency Automated Field Spectroscopy, J. Geophys. Res. Biogeosci., 125(7), doi:10.1029/2019JG005533, 2020.

Cheng, R., Magney, T. S., Dutta, D., Bowling, D. R., Logan, B. A., Burns, S. P., Blanken, P. D., Grossmann, K., Lopez, S., Richardson, A. D., Stutz, J. and Frankenberg, C.: Decomposing reflectance spectra to track gross primary production in a subalpine evergreen forest, Biogeosciences, 17(18), 4523–4544, doi:10.5194/bg-17-4523-2020, 2020.

von Clarmann, T., Degenstein, D. A., Livesey, N. J., Bender, S., Braverman, A., Butz, A., Compernolle, S., Damadeo, R., Dueck, S., Eriksson, P., Funke, B., Johnson, M. C., Kasai, Y., Keppens, A., Kleinert, A., Kramarova, N. A., Laeng, A., Langerock, B., Payne, V. H., Rozanov, A., Sato, T. O., Schneider, M., Sheese, P., Sofieva, V., Stiller, G. P., von Savigny, C. and Zawada, D.: Overview: Estimating and reporting uncertainties in remotely sensed atmospheric composition and temperature, Atmos. Meas. Tech., 13(8), 4393–4436, doi:10.5194/amt-13-4393-2020, 2020.

Fix, A., Amediek, A., Büdenbender, C., Ehret, G., Kiemle, C., Quatrevalet, M., Wirth, M., Wolff, S., Bovensmann, H., Butz, A., Gałkowski, M., Gerbig, C., Jöckel, P., Marshall, J., Nęcki, J., Pfeilsticker, K., Roiger, A., Swolkień, J., Zöger, M., and the CoMet team: CH4 and CO2 IPDA Lidar Measurements During the Comet 2018 Airborne Field Campaign, edited by D. Liu, Y. Wang, Y. Wu, B. Gross, and F. Moshary, EPJ Web Conf., 237, 03005, doi:10.1051/epjconf/202023703005, 2020.

He, L., Magney, T., Dutta, D., Yin, Y., Köhler, P., Grossmann, K., Stutz, J., Dold, C., Hatfield, J., Guan, K., Peng, B. and Frankenberg, C.: From the Ground to Space: Using Solar‐Induced Chlorophyll Fluorescence to Estimate Crop Productivity, Geophys. Res. Lett., 47(7), doi:10.1029/2020GL087474, 2020.

Parazoo, N. C., Magney, T., Norton, A., Raczka, B., Bacour, C., Maignan, F., Baker, I., Zhang, Y., Qiu, B., Shi, M., MacBean, N., Bowling, D. R., Burns, S. P., Blanken, P. D., Stutz, J., Grossmann, K. and Frankenberg, C.: Wide discrepancies in the magnitude and direction of modeled solar-induced chlorophyll fluorescence in response to light conditions, Biogeosciences, 17(13), 3733–3755, doi:10.5194/bg-17-3733-2020, 2020.

Strandgren, J., Krutz, D., Wilzewski, J., Paproth, C., Sebastian, I., Gurney, K. R., Liang, J., Roiger, A. and Butz, A.: Towards spaceborne monitoring of localized CO2 emissions: an instrument concept and first performance assessment, Atmos. Meas. Tech., 13(6), 2887–2904, doi:10.5194/amt-13-2887-2020, 2020.

Wilzewski, J. S., Roiger, A., Strandgren, J., Landgraf, J., Feist, D. G., Velazco, V. A., Deutscher, N. M., Morino, I., Ohyama, H., Té, Y., Kivi, R., Warneke, T., Notholt, J., Dubey, M., Sussmann, R., Rettinger, M., Hase, F., Shiomi, K. and Butz, A.: Spectral sizing of a coarse-spectral-resolution satellite sensor for XCO2, Atmos. Meas. Tech., 13(2), 731–745, doi:10.5194/amt-13-731-2020, 2020.

Wu, L., aan de Brugh, J., Meijer, Y., Sierk, B., Hasekamp, O., Butz, A. and Landgraf, J.: XCO2 observations using satellite measurements with moderate spectral resolution: investigation using GOSAT and OCO-2 measurements, Atmos. Meas. Tech., 13(2), 713–729, doi:10.5194/amt-13-713-2020, 2020.

Frey, M., Sha, M. K., Hase, F., Kiel, M., Blumenstock, T., Harig, R., Surawicz, G., Deutscher, N. M., Shiomi, K., Franklin, J. E., Bösch, H., Chen, J., Grutter, M., Ohyama, H., Sun, Y., Butz, A., Mengistu Tsidu, G., Ene, D., Wunch, D., Cao, Z., Garcia, O., Ramonet, M., Vogel, F. and Orphal, J.: Building the COllaborative Carbon Column Observing Network (COCCON): long-term stability and ensemble performance of the EM27/SUN Fourier transform spectrometer, Atmos. Meas. Tech., 12(3), 1513–1530, doi:10.5194/amt-12-1513-2019, 2019.

Kostinek, J., Roiger, A., Davis, K. J., Sweeney, C., DiGangi, J. P., Choi, Y., Baier, B., Hase, F., Groß, J., Eckl, M., Klausner, T. and Butz, A.: Adaptation and performance assessment of a quantum and interband cascade laser spectrometer for simultaneous airborne in situ observation of CH4 C2H6, CO2, CO and N2O, Atmos. Meas. Tech., 12(3), 1767–1783, doi:10.5194/amt-12-1767-2019, 2019.

Luther, A., Kleinschek, R., Scheidweiler, L., Defratyka, S., Stanisavljevic, M., Forstmaier, A., Dandocsi, A., Wolff, S., Dubravica, D., Wildmann, N., Kostinek, J., Jöckel, P., Nickl, A.-L., Klausner, T., Hase, F., Frey, M., Chen, J., Dietrich, F., Nȩcki, J., Swolkień, J., Fix, A., Roiger, A. and Butz, A.: Quantifying CH4 emissions from hard coal mines using mobile sun-viewing Fourier transform spectrometry, Atmos. Meas. Tech., 12(10), 5217–5230, doi:10.5194/amt-12-5217-2019, 2019.

Raczka, B., Porcar‐Castell, A., Magney, T., Lee, J. E., Köhler, P., Frankenberg, C., Grossmann, K., Logan, B. A., Stutz, J., Blanken, P. D., Burns, S. P., Duarte, H., Yang, X., Lin, J. C. and Bowling, D. R.: Sustained Nonphotochemical Quenching Shapes the Seasonal Pattern of Solar‐Induced Fluorescence at a High‐Elevation Evergreen Forest, J. Geophys. Res. Biogeosci., 124(7), 2005–2020, doi:10.1029/2018JG004883, 2019.

Wu, L., Hasekamp, O., Hu, H., aan de Brugh, J., Landgraf, J., Butz, A. and Aben, I.: Full-physics carbon dioxide retrievals from the Orbiting Carbon Observatory-2 (OCO-2) satellite by only using the 2.06 µm band, Atmos. Meas. Tech., 12(11), 6049–6058, doi:10.5194/amt-12-6049-2019, 2019.

Buchwitz, M., Reuter, M., Schneising, O., Noël, S., Gier, B., Bovensmann, H., Burrows, J. P., Boesch, H., Anand, J., Parker, R. J., Somkuti, P., Detmers, R. G., Hasekamp, O. P., Aben, I., Butz, A., Kuze, A., Suto, H., Yoshida, Y., Crisp, D. and O’Dell, C.: Computation and analysis of atmospheric carbon dioxide annual mean growth rates from satellite observations during 2003–2016, Atmos. Chem. Phys., 18(23), 17355–17370, doi:10.5194/acp-18-17355-2018, 2018.

Hu, H., Landgraf, J., Detmers, R., Borsdorff, T., Aan de Brugh, J., Aben, I., Butz, A. and Hasekamp, O.: Toward Global Mapping of Methane With TROPOMI: First Results and Intersatellite Comparison to GOSAT, Geophys. Res. Lett., 45(8), 3682–3689, doi:10.1002/2018GL077259, 2018.

Platt, U., Bobrowski, N. and Butz, A.: Ground-Based Remote Sensing and Imaging of Volcanic Gases and Quantitative Determination of Multi-Species Emission Fluxes, Geosciences, 8(2), 44, doi:10.3390/geosciences8020044, 2018.

Wu, L., Hasekamp, O., Hu, H., Landgraf, J., Butz, A., aan de Brugh, J., Aben, I., Pollard, D. F., Griffith, D. W. T., Feist, D. G., Koshelev, D., Hase, F., Toon, G. C., Ohyama, H., Morino, I., Notholt, J., Shiomi, K., Iraci, L., Schneider, M., de Mazière, M., Sussmann, R., Kivi, R., Warneke, T., Goo, T.-Y. and Té, Y.: Carbon dioxide retrieval from OCO-2 satellite observations using the RemoTeC algorithm and validation with TCCON measurements, Atmos. Meas. Tech., 11(5), 3111–3130, doi:10.5194/amt-11-3111-2018, 2018.

Agusti-Panareda, A., Diamantakis, M., Bayona, V., Klappenbach, F. and Butz, A.: Improving the inter-hemispheric gradient of total column atmospheric CO2 and CH4 in simulations with the ECMWF semi-Lagrangian atmospheric global model, Geosci. Model Dev., 10(1), 1–18, doi:10.5194/gmd-10-1-2017, 2017.

Buchwitz, M., Reuter, M., Schneising, O., Hewson, W., Detmers, R. G., Boesch, H., Hasekamp, O. P., Aben, I., Bovensmann, H., Burrows, J. P., Butz, A., Chevallier, F., Dils, B., Frankenberg, C., Heymann, J., Lichtenberg, G., De Mazière, M., Notholt, J., Parker, R., Warneke, T., Zehner, C., Griffith, D. W. T., Deutscher, N. M., Kuze, A., Suto, H. and Wunch, D.: Global satellite observations of column-averaged carbon dioxide and methane: The GHG-CCI XCO2 and XCH4 CRDP3 data set, Remote Sensing of Environment, 203, 276–295, doi:10.1016/j.rse.2016.12.027, 2017a.

Buchwitz, M., Schneising, O., Reuter, M., Heymann, J., Krautwurst, S., Bovensmann, H., Burrows, J. P., Boesch, H., Parker, R. J., Somkuti, P., Detmers, R. G., Hasekamp, O. P., Aben, I., Butz, A., Frankenberg, C. and Turner, A. J.: Satellite-derived methane hotspot emission estimates using a fast data-driven method, Atmos. Chem. Phys., 17(9), 5751–5774, doi:10.5194/acp-17-5751-2017, 2017b.

Butz, A., Dinger, A. S., Bobrowski, N., Kostinek, J., Fieber, L., Fischerkeller, C., Giuffrida, G. B., Hase, F., Klappenbach, F., Kuhn, J., Lübcke, P., Tirpitz, L. and Tu, Q.: Remote sensing of volcanic CO2, HF, HCl, SO2, and BrO in the downwind plume of Mt. Etna, Atmos. Meas. Tech., 10(1), 1–14, doi:10.5194/amt-10-1-2017, 2017.

Hu, H., Hasekamp, O., Butz, A., Galli, A., Landgraf, J., Aan de Brugh, J., Borsdorff, T., Scheepmaker, R. and Aben, I.: The operational methane retrieval algorithm for TROPOMI, Atmos. Meas. Tech., 9(11), 5423–5440, doi:10.5194/amt-9-5423-2016, 2016.

Landgraf, J., aan de Brugh, J., Scheepmaker, R., Borsdorff, T., Hu, H., Houweling, S., Butz, A., Aben, I. and Hasekamp, O.: Carbon monoxide total column retrievals from TROPOMI shortwaveinfrared measurements, Atmos. Meas. Tech., 9(10), 4955–4975, doi:10.5194/amt-9-4955-2016, 2016.

Schepers, D., Butz, A., Hu, H., Hasekamp, O. P., Arnold, S. G., Schneider, M., Feist, D. G., Morino, I., Pollard, D., Aben, I. and Landgraf, J.: Methane and carbon dioxide total column retrievals from cloudy GOSAT soundings over the oceans, J. Geophys. Res. Atmos., 121(9), 5031–5050, doi:10.1002/2015JD023389, 2016.

Tanaka, T., Yates, E., Iraci, L. T., Johnson, M. S., Gore, W., Tadic, J. M., Loewenstein, M., Kuze, A., Frankenberg, C., Butz, A. and Yoshida, Y.: Two-Year Comparison of Airborne Measurements of CO2 and CH4 With GOSAT at Railroad Valley, Nevada, IEEE Trans. Geosci. Remote Sensing, 54(8), 4367–4375, doi:10.1109/TGRS.2016.2539973, 2016.

Turner, A. J., Jacob, D. J., Benmergui, J., Wofsy, S. C., Maasakkers, J. D., Butz, A., Hasekamp, O. and Biraud, S. C.: A large increase in U.S. methane emissions over the past decade inferred from satellite data and surface observations, Geophys. Res. Lett., 43(5), 2218–2224, doi:10.1002/2016GL067987, 2016.

Alexe, M., Bergamaschi, P., Segers, A., Detmers, R., Butz, A., Hasekamp, O., Guerlet, S., Parker, R., Boesch, H., Frankenberg, C., Scheepmaker, R. A., Dlugokencky, E., Sweeney, C., Wofsy, S. C. and Kort, E. A.: Inverse modelling of CH4 emissions for 2010–2011 using different satellite retrieval products from GOSAT and SCIAMACHY, Atmos. Chem. Phys., 15(1), 113–133, doi:10.5194/acp-15-113-2015, 2015.

Babenhauserheide, A., Basu, S., Houweling, S., Peters, W. and Butz, A.: Comparing the CarbonTracker and TM5-4DVar data assimilation systems for CO2 surface flux inversions, Atmos. Chem. Phys., 15(17), 9747–9763, doi:10.5194/acp-15-9747-2015, 2015.

Buchwitz, M., Reuter, M., Schneising, O., Boesch, H., Guerlet, S., Dils, B., Aben, I., Armante, R., Bergamaschi, P., Blumenstock, T., Bovensmann, H., Brunner, D., Buchmann, B., Burrows, J. P., Butz, A., Chédin, A., Chevallier, F., Crevoisier, C. D., Deutscher, N. M., Frankenberg, C., Hase, F., Hasekamp, O. P., Heymann, J., Kaminski, T., Laeng, A., Lichtenberg, G., De Mazière, M., Noël, S., Notholt, J., Orphal, J., Popp, C., Parker, R., Scholze, M., Sussmann, R., Stiller, G. P., Warneke, T., Zehner, C., Bril, A., Crisp, D., Griffith, D. W. T., Kuze, A., O’Dell, C., Oshchepkov, S., Sherlock, V., Suto, H., Wennberg, P., Wunch, D., Yokota, T. and Yoshida, Y.: The Greenhouse Gas Climate Change Initiative (GHG-CCI): Comparison and quality assessment of near-surface-sensitive satellite-derived CO2 and CH4 global data sets, Remote Sensing of Environment, 162, 344–362, doi:10.1016/j.rse.2013.04.024, 2015.

Butz, A., Orphal, J., Checa-Garcia, R., Friedl-Vallon, F., von Clarmann, T., Bovensmann, H., Hasekamp, O., Landgraf, J., Knigge, T., Weise, D., Sqalli-Houssini, O. and Kemper, D.: Geostationary Emission Explorer for Europe (G3E): mission concept and initial performance assessment, Atmos. Meas. Tech., 8(11), 4719–4734, doi:10.5194/amt-8-4719-2015, 2015.

Checa-Garcia, R., Landgraf, J., Galli, A., Hase, F., Velazco, V. A., Tran, H., Boudon, V., Alkemade, F. and Butz, A.: Mapping spectroscopic uncertainties into prospective methane retrieval errors from Sentinel-5 and its precursor, Atmos. Meas. Tech., 8(9), 3617–3629, doi:10.5194/amt-8-3617-2015, 2015.

Detmers, R. G., Hasekamp, O., Aben, I., Houweling, S., Leeuwen, T. T., Butz, A., Landgraf, J., Köhler, P., Guanter, L. and Poulter, B.: Anomalous carbon uptake in Australia as seen by GOSAT, Geophys. Res. Lett., 42(19), 8177–8184, doi:10.1002/2015GL065161, 2015.

Houweling, S., Baker, D., Basu, S., Boesch, H., Butz, A., Chevallier, F., Deng, F., Dlugokencky, E. J., Feng, L., Ganshin, A., Hasekamp, O., Jones, D., Maksyutov, S., Marshall, J., Oda, T., O’Dell, C. W., Oshchepkov, S., Palmer, P. I., Peylin, P., Poussi, Z., Reum, F., Takagi, H., Yoshida, Y. and Zhuravlev, R.: An intercomparison of inverse models for estimating sources and sinks of CO2 using GOSAT measurements: GOSAT INVERSION INTER-COMPARISON, J. Geophys. Res. Atmos., 120(10), 5253–5266, doi:10.1002/2014JD022962, 2015.

Klappenbach, F., Bertleff, M., Kostinek, J., Hase, F., Blumenstock, T., Agusti-Panareda, A., Razinger, M. and Butz, A.: Accurate mobile remote sensing of XCO2 and XCH4 latitudinal transects from aboard a research vessel, Atmos. Meas. Tech., 8(12), 5023–5038, doi:10.5194/amt-8-5023-2015, 2015.

Basu, S., Krol, M., Butz, A., Clerbaux, C., Sawa, Y., Machida, T., Matsueda, H., Frankenberg, C., Hasekamp, O. P. and Aben, I.: The seasonal variation of the CO2 flux over Tropical Asia estimated from GOSAT, CONTRAIL, and IASI, Geophys. Res. Lett., 41(5), 1809–1815, doi:10.1002/2013GL059105, 2014.

Dils, B., Buchwitz, M., Reuter, M., Schneising, O., Boesch, H., Parker, R., Guerlet, S., Aben, I., Blumenstock, T., Burrows, J. P., Butz, A., Deutscher, N. M., Frankenberg, C., Hase, F., Hasekamp, O. P., Heymann, J., De Mazière, M., Notholt, J., Sussmann, R., Warneke, T., Griffith, D., Sherlock, V. and Wunch, D.: The Greenhouse Gas Climate Change Initiative (GHG-CCI): comparative validation of GHG-CCI SCIAMACHY/ENVISAT and TANSO-FTS/GOSAT CO2 and CH4 retrieval algorithm products with measurements from the TCCON, Atmos. Meas. Tech., 7(6), 1723–1744, doi:10.5194/amt-7-1723-2014, 2014.

Galli, A., Guerlet, S., Butz, A., Aben, I., Suto, H., Kuze, A., Deutscher, N. M., Notholt, J., Wunch, D., Wennberg, P. O., Griffith, D. W. T., Hasekamp, O. and Landgraf, J.: The impact of spectral resolution on satellite retrieval accuracy of CO2 and CH4, Atmos. Meas. Tech., 7(4), 1105–1119, doi:10.5194/amt-7-1105-2014, 2014.

Kritten, L., Butz, A., Chipperfield, M. P., Dorf, M., Dhomse, S., Hossaini, R., Oelhaf, H., Prados-Roman, C., Wetzel, G. and Pfeilsticker, K.: Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere, Atmos. Chem. Phys., 14(18), 9555–9566, doi:10.5194/acp-14-9555-2014, 2014.

Massart, S., Agusti-Panareda, A., Aben, I., Butz, A., Chevallier, F., Crevoisier, C., Engelen, R., Frankenberg, C. and Hasekamp, O.: Assimilation of atmospheric methane products into the MACC-II system: from SCIAMACHY to TANSO and IASI, Atmos. Chem. Phys., 14(12), 6139–6158, doi:10.5194/acp-14-6139-2014, 2014.

Reuter, M., Buchwitz, M., Hilker, M., Heymann, J., Schneising, O., Pillai, D., Bovensmann, H., Burrows, J. P., Bösch, H., Parker, R., Butz, A., Hasekamp, O., O’Dell, C. W., Yoshida, Y., Gerbig, C., Nehrkorn, T., Deutscher, N. M., Warneke, T., Notholt, J., Hase, F., Kivi, R., Sussmann, R., Machida, T., Matsueda, H. and Sawa, Y.: Satellite-inferred European carbon sink larger than expected, Atmos. Chem. Phys., 14(24), 13739–13753, doi:10.5194/acp-14-13739-2014, 2014.

Schepers, D., aan de Brugh, J. M. J., Hahne, Ph., Butz, A., Hasekamp, O. P. and Landgraf, J.: LINTRAN v2.0: A linearised vector radiative transfer model for efficient simulation of satellite-born nadir-viewing reflection measurements of cloudy atmospheres, Journal of Quantitative Spectroscopy and Radiative Transfer, 149, 347–359, doi:10.1016/j.jqsrt.2014.08.019, 2014.

Tadic, J. M., Loewenstein, M., Frankenberg, C., Butz, A., Roby, M., Iraci, L. T., Yates, E. L., Gore, W. and Kuze, A.: A Comparison of In Situ Aircraft Measurements of Carbon Dioxide and Methane to GOSAT Data Measured Over Railroad Valley Playa, Nevada, USA, IEEE Trans. Geosci. Remote Sensing, 52(12), 7764–7774, doi:10.1109/TGRS.2014.2318201, 2014.

Takagi, H., Houweling, S., Andres, R. J., Belikov, D., Bril, A., Boesch, H., Butz, A., Guerlet, S., Hasekamp, O., Maksyutov, S., Morino, I., Oda, T., O’Dell, C. W., Oshchepkov, S., Parker, R., Saito, M., Uchino, O., Yokota, T., Yoshida, Y. and Valsala, V.: Influence of differences in current GOSAT XCO2 retrievals on surface flux estimation: GOSAT-BASED INVERSION INTER-COMPARISON, Geophys. Res. Lett., 41(7), 2598–2605, doi:10.1002/2013GL059174, 2014.

Basu, S., Guerlet, S., Butz, A., Houweling, S., Hasekamp, O., Aben, I., Krummel, P., Steele, P., Langenfelds, R., Torn, M., Biraud, S., Stephens, B., Andrews, A. and Worthy, D.: Global CO2 fluxes estimated from GOSAT retrievals of total column CO2, Atmos. Chem. Phys., 13(17), 8695–8717, doi:10.5194/acp-13-8695-2013, 2013.

Butz, A., Guerlet, S., Hasekamp, O. P., Kuze, A. and Suto, H.: Using ocean-glint scattered sunlight as a diagnostic tool for satellite remote sensing of greenhouse gases, Atmos. Meas. Tech., 6(9), 2509–2520, doi:10.5194/amt-6-2509-2013, 2013.

Guerlet, S., Butz, A., Schepers, D., Basu, S., Hasekamp, O. P., Kuze, A., Yokota, T., Blavier, J.-F., Deutscher, N. M., Griffith, D. W. T., Hase, F., Kyro, E., Morino, I., Sherlock, V., Sussmann, R., Galli, A. and Aben, I.: Impact of aerosol and thin cirrus on retrieving and validating XCO2 from GOSAT shortwave infrared measurements: CIRRUS AND AEROSOL ERRORS IN GOSAT XCO2, J. Geophys. Res. Atmos., 118(10), 4887–4905, doi:10.1002/jgrd.50332, 2013a.

Guerlet, S., Basu, S., Butz, A., Krol, M., Hahne, P., Houweling, S., Hasekamp, O. P. and Aben, I.: Reduced carbon uptake during the 2010 Northern Hemisphere summer from GOSAT: IAV IN XCO2 SEASONAL CYCLES AS SEEN FROM GOSAT, Geophys. Res. Lett., 40(10), 2378–2383, doi:10.1002/grl.50402, 2013b.

Monteil, G., Houweling, S., Butz, A., Guerlet, S., Schepers, D., Hasekamp, O., Frankenberg, C., Scheepmaker, R., Aben, I. and Röckmann, T.: Comparison of CH4 inversions based on 15 months of GOSAT and SCIAMACHY observations: INVERSE MODELING OF SATELLITE RETRIEVED XCH4, J. Geophys. Res. Atmos., 118(20), 11,807-11,823, doi:10.1002/2013JD019760, 2013.

Oshchepkov, S., Bril, A., Yokota, T., Wennberg, P. O., Deutscher, N. M., Wunch, D., Toon, G. C., Yoshida, Y., O’Dell, C. W., Crisp, D., Miller, C. E., Frankenberg, C., Butz, A., Aben, I., Guerlet, S., Hasekamp, O., Boesch, H., Cogan, A., Parker, R., Griffith, D., Macatangay, R., Notholt, J., Sussmann, R., Rettinger, M., Sherlock, V., Robinson, J., Kyrö, E., Heikkinen, P., Feist, D. G., Morino, I., Kadygrov, N., Belikov, D., Maksyutov, S., Matsunaga, T., Uchino, O. and Watanabe, H.: Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 2: Algorithm intercomparison in the GOSAT data processing for CO2 retrievals over TCCON sites: GOSAT ALGORITHM COMPARISON, J. Geophys. Res. Atmos., 118(3), 1493–1512, doi:10.1002/jgrd.50146, 2013.

Parazoo, N. C., Bowman, K., Frankenberg, C., Lee, J., Fisher, J. B., Worden, J., Jones, D. B. A., Berry, J., Collatz, G. J., Baker, I. T., Jung, M., Liu, J., Osterman, G., O’Dell, C., Sparks, A., Butz, A., Guerlet, S., Yoshida, Y., Chen, H. and Gerbig, C.: Interpreting seasonal changes in the carbon balance of southern Amazonia using measurements of XCO2 and chlorophyll fluorescence from GOSAT, Geophys. Res. Lett., 40(11), 2829–2833, doi:10.1002/grl.50452, 2013.

Reuter, M., Bösch, H., Bovensmann, H., Bril, A., Buchwitz, M., Butz, A., Burrows, J. P., O’Dell, C. W., Guerlet, S., Hasekamp, O., Heymann, J., Kikuchi, N., Oshchepkov, S., Parker, R., Pfeifer, S., Schneising, O., Yokota, T. and Yoshida, Y.: A joint effort to deliver satellite retrieved atmospheric CO2 concentrations for surface flux inversions: the ensemble median algorithm EMMA, Atmos. Chem. Phys., 13(4), 1771–1780, doi:10.5194/acp-13-1771-2013, 2013.

Scheepmaker, R. A., Frankenberg, C., Galli, A., Butz, A., Schrijver, H., Deutscher, N. M., Wunch, D., Warneke, T., Fally, S. and Aben, I.: Improved water vapour spectroscopy in the 4174–4300 cm-1 region and its impact on SCIAMACHY HDO/H2O measurements, Atmos. Meas. Tech., 6(4), 879–894, doi:10.5194/amt-6-879-2013, 2013.

Butz, A., Galli, A., Hasekamp, O., Landgraf, J., Tol, P. and Aben, I.: TROPOMI aboard Sentinel-5 Precursor: Prospective performance of CH4 retrievals for aerosol and cirrus loaded atmospheres, Remote Sensing of Environment, 120, 267–276, doi:10.1016/j.rse.2011.05.030, 2012.

Frankenberg, C., Hasekamp, O., O’Dell, C., Sanghavi, S., Butz, A. and Worden, J.: Aerosol information content analysis of multi-angle high spectral resolution measurements and its benefit for high accuracy greenhouse gas retrievals, Atmos. Meas. Tech., 5(7), 1809–1821, doi:10.5194/amt-5-1809-2012, 2012.

Galli, A., Butz, A., Scheepmaker, R. A., Hasekamp, O., Landgraf, J., Tol, P., Wunch, D., Deutscher, N. M., Toon, G. C., Wennberg, P. O., Griffith, D. W. T. and Aben, I.: CH4, CO, and H2O spectroscopy for the Sentinel-5 Precursor mission: an assessment with the Total Carbon Column Observing Network measurements, Atmos. Meas. Tech., 5(6), 1387–1398, doi:10.5194/amt-5-1387-2012, 2012.

Oshchepkov, S., Bril, A., Yokota, T., Morino, I., Yoshida, Y., Matsunaga, T., Belikov, D., Wunch, D., Wennberg, P., Toon, G., O’Dell, C., Butz, A., Guerlet, S., Cogan, A., Boesch, H., Eguchi, N., Deutscher, N., Griffith, D., Macatangay, R., Notholt, J., Sussmann, R., Rettinger, M., Sherlock, V., Robinson, J., Kyrö, E., Heikkinen, P., Feist, D. G., Nagahama, T., Kadygrov, N., Maksyutov, S., Uchino, O. and Watanabe, H.: Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space: Validation of PPDF-based CO2 retrievals from GOSAT: VALIDATION OF PPDF-BASED CO2 RETRIEVALS, J. Geophys. Res., 117(D12), n/a-n/a, doi:10.1029/2012JD017505, 2012.

Schepers, D., Guerlet, S., Butz, A., Landgraf, J., Frankenberg, C., Hasekamp, O., Blavier, J.-F., Deutscher, N. M., Griffith, D. W. T., Hase, F., Kyro, E., Morino, I., Sherlock, V., Sussmann, R. and Aben, I.: Methane retrievals from Greenhouse Gases Observing Satellite (GOSAT) shortwave infrared measurements: Performance comparison of proxy and physics retrieval algorithms: CH 4 FROM GOSAT-ALGORITHM COMPARISON, J. Geophys. Res., 117(D10), n/a-n/a, doi:10.1029/2012JD017549, 2012.

Vidot, J., Landgraf, J., Hasekamp, O. P., Butz, A., Galli, A., Tol, P. and Aben, I.: Carbon monoxide from shortwave infrared reflectance measurements: A new retrieval approach for clear sky and partially cloudy atmospheres, Remote Sensing of Environment, 120, 255–266, doi:10.1016/j.rse.2011.09.032, 2012.

Butz, A., Guerlet, S., Hasekamp, O., Schepers, D., Galli, A., Aben, I., Frankenberg, C., Hartmann, J.-M., Tran, H., Kuze, A., Keppel-Aleks, G., Toon, G., Wunch, D., Wennberg, P., Deutscher, N., Griffith, D., Macatangay, R., Messerschmidt, J., Notholt, J. and Warneke, T.: Toward accurate CO2 and CH4 observations from GOSAT, Geophys. Res. Lett., 38(14), n/a-n/a, doi:10.1029/2011GL047888, 2011.

Frankenberg, C., Butz, A. and Toon, G. C.: Disentangling chlorophyll fluorescence from atmospheric scattering effects in O2 A-band spectra of reflected sun-light: REMOTE SENSING OF CHLOROPHYLL FLUORESCENCE, Geophys. Res. Lett., 38(3), n/a-n/a, doi:10.1029/2010GL045896, 2011a.

Frankenberg, C., Fisher, J. B., Worden, J., Badgley, G., Saatchi, S. S., Lee, J.-E., Toon, G. C., Butz, A., Jung, M., Kuze, A. and Yokota, T.: New global observations of the terrestrial carbon cycle from GOSAT: Patterns of plant fluorescence with gross primary productivity: CHLOROPHYLL FLUORESCENCE FROM SPACE, Geophys. Res. Lett., 38(17), n/a-n/a, doi:10.1029/2011GL048738, 2011b.

Hasekamp, O. P., Litvinov, P. and Butz, A.: Aerosol properties over the ocean from PARASOL multiangle photopolarimetric measurements, J. Geophys. Res., 116(D14), D14204, doi:10.1029/2010JD015469, 2011.

Prados-Roman, C., Butz, A., Deutschmann, T., Dorf, M., Kritten, L., Minikin, A., Platt, U., Schlager, H., Sihler, H., Theys, N., Van Roozendael, M., Wagner, T. and Pfeilsticker, K.: Airborne DOAS limb measurements of tropospheric trace gas profiles: case studies on the profile retrieval of O4 and BrO, Atmos. Meas. Tech., 4(6), 1241–1260, doi:10.5194/amt-4-1241-2011, 2011.

Butz, A., Hasekamp, O. P., Frankenberg, C., Vidot, J. and Aben, I.: CH 4 retrievals from space-based solar backscatter measurements: Performance evaluation against simulated aerosol and cirrus loaded scenes: EVALUATION OF CH4 RETRIEVALS FROM SPACE, J. Geophys. Res., 115(D24), doi:10.1029/2010JD014514, 2010.

Kritten, L., Butz, A., Dorf, M., Deutschmann, T., Kühl, S., Prados-Roman, C., Puķīte, J., Rozanov, A., Schofield, R. and Pfeilsticker, K.: Time dependent profile retrieval of UV/vis absorbing radicals from balloon-borne limb measurements – a case study on NO2 and O3, Atmos. Meas. Tech., 3(4), 933–946, doi:10.5194/amt-3-933-2010, 2010.

Butz, A., Bösch, H., Camy-Peyret, C., Chipperfield, M. P., Dorf, M., Kreycy, S., Kritten, L., Prados-Román, C., Schwärzle, J. and Pfeilsticker, K.: Constraints on inorganic gaseous iodine in the tropical upper troposphere and stratosphere inferred from balloon-borne solar occultation observations, Atmos. Chem. Phys., 9(18), 7229–7242, doi:10.5194/acp-9-7229-2009, 2009a.

Butz, A., Hasekamp, O. P., Frankenberg, C. and Aben, I.: Retrievals of atmospheric CO2 from simulated space-borne measurements of backscattered near-infrared sunlight: accounting for aerosol effects, Appl. Opt., 48(18), 3322, doi:10.1364/AO.48.003322, 2009b.

Frankenberg, C., Yoshimura, K., Warneke, T., Aben, I., Butz, A., Deutscher, N., Griffith, D., Hase, F., Notholt, J., Schneider, M., Schrijver, H. and Röckmann, T.: Dynamic Processes Governing Lower-Tropospheric HDO/H2O Ratios as Observed from Space and Ground, Science, 325(5946), 1374–1377, doi:10.1126/science.1173791, 2009.

Payan, S., Camy-Peyret, C., Oelhaf, H., Wetzel, G., Maucher, G., Keim, C., Pirre, M., Huret, N., Engel, A., Volk, M. C., Kuellmann, H., Kuttippurath, J., Cortesi, U., Bianchini, G., Mencaraglia, F., Raspollini, P., Redaelli, G., Vigouroux, C., De Mazière, M., Mikuteit, S., Blumenstock, T., Velazco, V., Notholt, J., Mahieu, E., Duchatelet, P., Smale, D., Wood, S., Jones, N., Piccolo, C., Payne, V., Bracher, A., Glatthor, N., Stiller, G., Grunow, K., Jeseck, P., Te, Y. and Butz, A.: Validation of version-4.61 methane and nitrous oxide observed by MIPAS, Atmos. Chem. Phys., 9(2), 413–442, doi:10.5194/acp-9-413-2009, 2009.

Dorf, M., Butz, A., Camy-Peyret, C., Chipperfield, M. P., Kritten, L. and Pfeilsticker, K.: Bromine in the tropical troposphere and stratosphere as derived from balloon-borne BrO observations, Atmos. Chem. Phys., 8(23), 7265–7271, doi:10.5194/acp-8-7265-2008, 2008.

Frankenberg, C., Warneke, T., Butz, A., Aben, I., Hase, F., Spietz, P. and Brown, L. R.: Pressure broadening in the 2ν3 band of methane and its implication on atmospheric retrievals, Atmos. Chem. Phys., 8(17), 5061–5075, doi:10.5194/acp-8-5061-2008, 2008a.

Frankenberg, C., Bergamaschi, P., Butz, A., Houweling, S., Meirink, J. F., Notholt, J., Petersen, A. K., Schrijver, H., Warneke, T. and Aben, I.: Tropical methane emissions: A revised view from SCIAMACHY onboard ENVISAT, Geophys. Res. Lett., 35(15), L15811, doi:10.1029/2008GL034300, 2008b.

Hasekamp, O. P. and Butz, A.: Efficient calculation of intensity and polarization spectra in vertically inhomogeneous scattering and absorbing atmospheres, J. Geophys. Res., 113(D20), D20309, doi:10.1029/2008JD010379, 2008.

Butz, A., Bösch, H., Camy-Peyret, C., Dorf, M., Engel, A., Payan, S. and Pfeilsticker, K.: Observational constraints on the kinetics of the ClO-BrO and ClO-ClO ozone loss cycles in the Arctic winter stratosphere: CONSTRAINTS ON O3 LOSS CYCLES, Geophys. Res. Lett., 34(5), doi:10.1029/2006GL028718, 2007.

Kovalenko, L. J., Livesey, N. L., Salawitch, R. J., Camy-Peyret, C., Chipperfield, M. P., Cofield, R. E., Dorf, M., Drouin, B. J., Froidevaux, L., Fuller, R. A., Goutail, F., Jarnot, R. F., Jucks, K., Knosp, B. W., Lambert, A., MacKenzie, I. A., Pfeilsticker, K., Pommereau, J.-P., Read, W. G., Santee, M. L., Schwartz, M. J., Snyder, W. V., Stachnik, R., Stek, P. C., Wagner, P. A. and Waters, J. W.: Validation of Aura Microwave Limb Sounder BrO observations in the stratosphere, J. Geophys. Res., 112(D24), D24S41, doi:10.1029/2007JD008817, 2007.

Butz, A., Bösch, H., Camy-Peyret, C., Chipperfield, M., Dorf, M., Dufour, G., Grunow, K., Jeseck, P., Kühl, S., Payan, S., Pepin, I., Pukite, J., Rozanov, A., von Savigny, C., Sioris, C., Wagner, T., Weidner, F. and Pfeilsticker, K.: Inter-comparison of stratospheric O3 and NO2 abundances retrieved from balloon borne direct sun observations and Envisat/SCIAMACHY limb measurements, Atmos. Chem. Phys., 6(5), 1293–1314, doi:10.5194/acp-6-1293-2006, 2006.

Dorf, M., Bösch, H., Butz, A., Camy-Peyret, C., Chipperfield, M. P., Engel, A., Goutail, F., Grunow, K., Hendrick, F., Hrechanyy, S., Naujokat, B., Pommereau, J.-P., Van Roozendael, M., Sioris, C., Stroh, F., Weidner, F. and Pfeilsticker, K.: Balloon-borne stratospheric BrO measurements: comparison with Envisat/SCIAMACHY BrO limb profiles, Atmos. Chem. Phys., 6(9), 2483–2501, doi:10.5194/acp-6-2483-2006, 2006a.

Dorf, M., Butler, J. H., Butz, A., Camy-Peyret, C., Chipperfield, M. P., Kritten, L., Montzka, S. A., Simmes, B., Weidner, F. and Pfeilsticker, K.: Long-term observations of stratospheric bromine reveal slow down in growth, Geophys. Res. Lett., 33(24), L24803, doi:10.1029/2006GL027714, 2006b.

Sioris, C. E., Kovalenko, L. J., McLinden, C. A., Salawitch, R. J., Van Roozendael, M., Goutail, F., Dorf, M., Pfeilsticker, K., Chance, K., von Savigny, C., Liu, X., Kurosu, T. P., Pommereau, J.-P., Bösch, H. and Frerick, J.: Latitudinal and vertical distribution of bromine monoxide in the lower stratosphere from Scanning Imaging Absorption Spectrometer for Atmospheric Chartography limb scattering measurements, J. Geophys. Res., 111(D14), D14301, doi:10.1029/2005JD006479, 2006.

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Gurlit, W., Bösch, H., Bovensmann, H., Burrows, J. P., Butz, A., Camy-Peyret, C., Dorf, M., Gerilowski, K., Lindner, A., Noël, S., Platt, U., Weidner, F. and Pfeilsticker, K.: The UV-A and visible solar irradiance spectrum: inter-comparison of absolutely calibrated, spectrally medium resolution solar irradiance spectra from balloon- and satellite-borne measurements, Atmos. Chem. Phys., 5(7), 1879–1890, doi:10.5194/acp-5-1879-2005, 2005.

Weidner, F., Bösch, H., Bovensmann, H., Burrows, J. P., Butz, A., Camy-Peyret, C., Dorf, M., Gerilowski, K., Gurlit, W., Platt, U., von Friedeburg, C., Wagner, T. and Pfeilsticker, K.: Balloon-borne limb profiling of UV/vis skylight radiances, O3, NO2, and BrO: technical set-up and validation of the method, Atmos. Chem. Phys., 5(5), 1409–1422, doi:10.5194/acp-5-1409-2005, 2005.

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