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

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. Currently, we have several open Ph.D. positions: Local tracer transport and machine learning, Local CO2 emissions modelling, Measuring CH4 emissions images.


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. (more information 1, 2).




Interdisciplinary Thematic Research Network on transformations and the Anthropocene together with researchers from the social sciences and humanities (more information).


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).


Understanding the biogenic carbon cycle: Anomaly of photosynthetic carbon uptake during the 2018 heat wave in Central Europe. The figure shows the anomaly for August 2018 (in units of standard deviations) compared to the multi-year August-average. Photosynthetic uptake is parameterized through measurements of sun-induced fluorescence (SIF), the map is gap-filled and extrapolated by a machine learning technique using satellite reflectance measurements.


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.
Becker, Carl, cand.
Beikert, Johanna, cand.
Bünau, Kenneth von, cand.
Bobrowski, Nicole, Dr., Senior scientist
Butz, André, Prof. Dr., Head of group
Gassama, Angelika, Technician
Hanft, Valentin, cand.
Hemmer, Benedikt, Ph.D. cand.,
Holzbeck, Philip, cand.,
Kleinschek, Ralph, Optics engineer
Knaack, Timo, cand.
Knapp, Marvin, Ph.D. cand.,
Luther, Andreas, Dr., Postdoc
Niedeggen, Franziska, cand.
Pilz, Lukas, Ph.D. cand.,
Scheidweiler, Leon, cand.,
Schmitt, Tobias, Ph.D. cand.
Schömann, Eva-Marie, cand.
Schreiner, Lena, cand.
Vardag, Sanam, Dr., Senior scientist
Voss, Karolin, cand.,
Wald, Simone, cand.

Alumni and theses

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);


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.

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 System Science Data, 13(1), 199–211, doi:10.5194/essd-13-199-2021, 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.

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 CO 2 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, Atmospheric Measurement Techniques, 13(6), 2887–2904, doi:10.5194/amt-13-2887-2020, 2020.
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 on orbit, Atmospheric Measurement Techniques Discussions, 1–51, doi:10.5194/amt-2020-360, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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., Gro\s s, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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 mu band, Atmospheric Measurement Techniques, 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, Atmospheric Chemistry and Physics, 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, Geophysical Research Letters, 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), 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, Atmospheric Measurement Techniques, 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, Geoscientific Model Development, 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 Maziere, 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\hack\newline estimates using a fast data-driven method, Atmospheric Chemistry and Physics, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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 shortwave infrared measurements, Atmospheric Measurement Techniques, 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, Journal of Geophysical Research: Atmospheres, 121(9), 5031–5050, doi:10.1002/2015JD023389, 2016.
Tanaka, T., Yates, E., Iraci, L. T., Johnson, M. S., Gore, W., Tadić, 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 Transactions on Geoscience and 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, Geophysical Research Letters, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 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., Chedin, 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 Maziere, M., Noel, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 8(9), 3617–3629, doi:10.5194/amt-8-3617-2015, 2015.
Detmers, R. G., Hasekamp, O., Aben, I., Houweling, S., van Leeuwen, T. T., Butz, A., Landgraf, J., Köhler, P., Guanter, L. and Poulter, B.: Anomalous carbon uptake in Australia as seen by GOSAT, Geophysical Research Letters, 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, Journal of Geophysical Research: Atmospheres, 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, Atmospheric Measurement Techniques, 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, Geophysical Research Letters, 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 14(24), 13739–13753, doi:10.5194/acp-14-13739-2014, 2014.
Schepers, D., de Brugh, J. M. J. aan, 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 & RADIATIVE TRANSFER, 149, 347–359, doi:10.1016/j.jqsrt.2014.08.019, 2014.
Tadić, 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 Transactions on Geoscience and 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, Geophysical Research Letters, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Measurement Techniques, 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, Journal of Geophysical Research: Atmospheres, 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, Geophysical Research Letters, 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, Journal of Geophysical Research: Atmospheres, 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, Journal of Geophysical Research: Atmospheres, 118(3), 1493–1512, doi:10.1002/jgrd.50146, 2013.
Parazoo, N. C., Bowman, K., Frankenberg, C., Lee, J.-E., 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, Geophysical Research Letters, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Measurement Techniques, 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(SI), 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, Atmospheric Measurement Techniques, 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, Atmospheric Measurement Techniques, 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, Journal of Geophysical Research: Atmospheres, 117(D12), 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, Journal of Geophysical Research: Atmospheres, 117(D10), doi:10.1029/2012JD017549, 2012.
Vidot, J., Landgraf, J., Hasekamp, O., 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, 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, Geophysical Research Letters, 38(14), doi:10.1029/2011GL047888, 2011.
Frankenberg, C., Butz, A. and Toon, G. C.: Disentangling chlorophyll fluorescence from atmospheric scattering effects in O2A-band spectra of reflected sun-light, Geophysical Research Letters, 38(3), 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, Geophysical Research Letters, 38(17), doi:10.1029/2011GL048738, 2011b.
Hasekamp, O. P., Litvinov, P. and Butz, A.: Aerosol properties over the ocean from PARASOL multiangle photopolarimetric measurements, Journal of Geophysical Research: Atmospheres, 116(D14), 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, Atmospheric Measurement Techniques, 4(6), 1241–1260, doi:10.5194/amt-4-1241-2011, 2011.
Butz, A., Hasekamp, O. P., Frankenberg, C., Vidot, J. and Aben, I.: CH4 retrievals from space-based solar backscatter measurements: Performance evaluation against simulated aerosol and cirrus loaded scenes, Journal of Geophysical Research: Atmospheres, 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, Atmospheric Measurement Techniques, 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, Atmospheric Chemistry and Physics, 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), 3322–3336, 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, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 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, Geophysical Research Letters, 35(15), 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, Journal of Geophysical Research: Atmospheres, 113(D20), 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, Geophysical Research Letters, 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, Journal of Geophysical Research: Atmospheres, 112(D24), 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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 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, Geophysical Research Letters, 33(24), 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, Journal of Geophysical Research: Atmospheres, 111(D14), doi:10.1029/2005JD006479, 2006.
Canty, T., Rivière, E. D., Salawitch, R. J., Berthet, G., Renard, J.-B., Pfeilsticker, K., Dorf, M., Butz, A., Bösch, H., Stimpfle, R. M., Wilmouth, D. M., Richard, E. C., Fahey, D. W., Popp, P. J., Schoeberl, M. R., Lait, L. R. and Bui, T. P.: Nighttime OClO in the winter Arctic vortex, Journal of Geophysical Research: Atmospheres, 110(D1), doi:10.1029/2004JD005035, 2005.
Dufour, G., Payan, S., Lefèvre, F., Eremenko, M., Butz, A., Jeseck, P., Té, Y., Pfeilsticker, K. and Camy-Peyret, C.: 4-D comparison method to study the NOy partitioning in summer polar stratosphere – Influence of aerosol burden, Atmospheric Chemistry and Physics, 5(4), 919–926, doi:10.5194/acp-5-919-2005, 2005.
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, Atmospheric Chemistry and Physics, 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, Atmospheric Chemistry and Physics, 5(5), 1409–1422, doi:10.5194/acp-5-1409-2005, 2005.
Hendrick, F., Barret, B., Van Roozendael, M., Boesch, H., Butz, A., De Mazière, M., Goutail, F., Hermans, C., Lambert, J.-C., Pfeilsticker, K. and Pommereau, J.-P.: Retrieval of nitrogen dioxide stratospheric profiles from ground-based zenith-sky UV-visible observations: validation of the technique through correlative comparisons, Atmospheric Chemistry and Physics, 4(8), 2091–2106, doi:10.5194/acp-4-2091-2004, 2004.