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Asher, E., Hornbrook, R. S., Stephens, B. B., Kinnison, D., Morgan, E. J., Keeling, R. F., Atlas, E. L., Schauffler, S. M., Tilmes, S., Kort, E. A., Hoecker-Martínez, M. S., Long, M. C., Lamarque, J.-F., Saiz-Lopez, A., McKain, K., Sweeney, C., Hills, A. J., and Apel, E. C.: Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations, Atmos. Chem. Phys., https://doi.org/10.5194/acp-19-14071-2019, 2019.
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Birner, B., M. P. Chipperfield, E. J. Morgan, B. B. Stephens, M. Linz, W. Feng, C. Wilson, J. D. Bent, S. C. Wofsy, J. Severinghaus, and R. F. Keeling, 2020: Gravitational separation of Ar/N2 and age of air in the lowermost stratosphere in airborne observations and a chemical transport model. Atmos. Chem. Phys., doi: 10.5194/acp-2020-95.
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Chevallier, F., M. Remaud, C. W. O'Dell, D. Baker, P. Peylin, and A. Cozic, 2019: Objective evaluation of surface- and satellite-driven carbon dioxide atmospheric inversions. Atmos. Chem. Phys., 19, 14233–14251, doi: 10.5194/acp-19-14233-2019.
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Crowell, S., Baker, D., Schuh, A., Basu, S., Jacobson, A. R.,Chevallier, F., Liu, J., Deng, F., Feng, L., Chatterjee, A., Crisp, D., Eldering, A., Jones, D. B., McKain, K., Miller, J., Nassar, R., Oda, T.,O'Dell, C., Palmer, P. I., Schimel, D., Stephens, B., and Sweeney, C., 2019: The2015–2016 Carbon Cycle As Seen from OCO-2 and the Global In Situ Network,Atmos. Chem. Phys., doi: 10.5194/acp-19-9797-2019.
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D'Alessandro, J.J., M. Diao, C. Wu, X. Liu, J.B. Jensen, and B.B. Stephens, 2019: Cloud Phase and Relative Humidity Distributions over the Southern Ocean in Austral Summer Based on In Situ Observations and CAM5 Simulations. J. Climate, 32, 2781–2805, doi: 10.1175/JCLI-D-18-0232.1.
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Fisher, J. A., E. L. Atlas, B. Barletta, S. Meinardi, D. R. Blake, C. R. Thompson, T. B. Ryerson, J. Peischl, Z. A. Tzompa‐Sosa, and L. T. Murray, 2018: Methyl, Ethyl, and Propyl Nitrates: Global Distribution and Impacts on Reactive Nitrogen in Remote Marine Environments. J. Geophys. Res. Atmos., 123, 12, 429-12, 451, doi: 10.1029/2018JD029046.
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Friedlingstein, P., M. O'Sullivan, M. W. Jones, R. M. Andrew, L. Gregor, J. Hauck, C. Le Quéré, I. T. Luijkx, A. Olsen, G. P. Peters, W. Peters, J. Pongratz, C. Schwingshackl, S. Sitch, J. G. Canadell, P. Ciais, R. B. Jackson, S. R. Alin, R. Alkama, A. Arneth, V. K. Arora, N. R. Bates, M. Becker, N. Bellouin, H. C. Bittig, L. Bopp, F. Chevallier, L. P. Chini, M. Cronin, W. Evans, S. Falk, R. A. Feely, T. Gasser, M. Gehlen, T. Gkritzalis, L. Gloege, G. Grassi, N. Gruber, Ö. Gürses, I. Harris, M. Hefner, R. A. Houghton, G. C. Hurtt, Y. Iida, T. Ilyina, A. K. Jain, A. Jersild, K. Kadono, E. Kato, D. Kennedy, K. K. Goldewijk, J. Knauer, J. I. Korsbakken, P. Landschützer, N. Lefèvre, K. Lindsay, J. Liu, Z. Liu, G. Marland, N. Mayot, M. J. McGrath, N. Metzl, N. M. Monacci, D. R. Munro, S.-I. Nakaoka, Y. Niwa, K. O'Brien, T. Ono, P. I. Palmer, N. Pan, D. Pierrot, K. Pocock, B. Poulter, L. Resplandy, E. Robertson, C. Rödenbeck, C. Rodriguez, T. M. Rosan, J. Schwinger, R. Séférian, J. D. Shutler, I. Skjelvan, T. Steinhoff, Q. Sun, A. J. Sutton, C. Sweeney, S. Takao, T. Tanhua, P. P. Tans, X. Tian, H. Tian, B. Tilbrook, H. Tsujino, F. Tubiello, G. R. van der Werf, A. P. Walker, R. Wanninkhof, C. Whitehead, A. W. Wranne, R. Wright, W. Yuan, C. Yue, X. Yue, S. Zaehle, J. Zeng, and B. Zheng, 2022: Global Carbon Budget 2022. Earth Syst. Sci. Data, 14, 4811–4900, doi: 10.5194/essd-14-4811-2022.
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Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Bakker, D. C. E., Hauck, J., Landschützer, P., Le Quéré, C., Luijkx, I. T., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Anthoni, P., Barbero, L., Bates, N. R., Becker, M., Bellouin, N., Decharme, B., Bopp, L., Brasika, I. B. M., Cadule, P., Chamberlain, M. A., Chandra, N., Chau, T.-T.-T., Chevallier, F., Chini, L. P., Cronin, M., Dou, X., Enyo, K., Evans, W., Falk, S., Feely, R. A., Feng, L., Ford, D. J., Gasser, T., Ghattas, J., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Hefner, M., Heinke, J., Houghton, R. A., Hurtt, G. C., Iida, Y., Ilyina, T., Jacobson, A. R., Jain, A., Jarníková, T., Jersild, A., Jiang, F., Jin, Z., Joos, F., Kato, E., Keeling, R. F., Kennedy, D., Klein Goldewijk, K., Knauer, J., Korsbakken, J. I., Körtzinger, A., Lan, X., Lefèvre, N., Li, H., Liu, J., Liu, Z., Ma, L., Marland, G., Mayot, N., McGuire, P. C., McKinley, G. A., Meyer, G., Morgan, E. J., Munro, D. R., Nakaoka, S.-I., Niwa, Y., O'Brien, K. M., Olsen, A., Omar, A. M., Ono, T., Paulsen, M., Pierrot, D., Pocock, K., Poulter, B., Powis, C. M., Rehder, G., Resplandy, L., Robertson, E., Rödenbeck, C., Rosan, T. M., Schwinger, J., Séférian, R., Smallman, T. L., Smith, S. M., Sospedra-Alfonso, R., Sun, Q., Sutton, A. J., Sweeney, C., Takao, S., Tans, P. P., Tian, H., Tilbrook, B., Tsujino, H., Tubiello, F., van der Werf, G. R., van Ooijen, E., Wanninkhof, R., Watanabe, M., Wimart-Rousseau, C., Yang, D., Yang, X., Yuan, W., Yue, X., Zaehle, S., Zeng, J., and Zheng, B.: Global Carbon Budget 2023, Earth Syst. Sci. Data, 15, 5301–5369, https://doi.org/10.5194/essd-15-5301-2023, 2023.
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Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Hauck, J., Landschützer, P., Le Quéré, C., Li, H., Luijkx, I. T., Olsen, A., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Arneth, A., Arora, V., Bates, N. R., Becker, M., Bellouin, N., Berghoff, C. F., Bittig, H. C., Bopp, L., Cadule, P., Campbell, K., Chamberlain, M. A., Chandra, N., Chevallier, F., Chini, L. P., Colligan, T., Decayeux, J., Djeutchouang, L. M., Dou, X., Duran Rojas, C., Enyo, K., Evans, W., Fay, A. R., Feely, R. A., Ford, D. J., Foster, A., Gasser, T., Gehlen, M., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Hefner, M., Heinke, J., Hurtt, G. C., Iida, Y., Ilyina, T., Jacobson, A. R., Jain, A. K., Jarníková, T., Jersild, A., Jiang, F., Jin, Z., Kato, E., Keeling, R. F., Klein Goldewijk, K., Knauer, J., Korsbakken, J. I., Lan, X., Lauvset, S. K., Lefèvre, N., Liu, Z., Liu, J., Ma, L., Maksyutov, S., Marland, G., Mayot, N., McGuire, P. C., Metzl, N., Monacci, N. M., Morgan, E. J., Nakaoka, S.-I., Neill, C., Niwa, Y., Nützel, T., Olivier, L., Ono, T., Palmer, P. I., Pierrot, D., Qin, Z., Resplandy, L., Roobaert, A., Rosan, T. M., Rödenbeck, C., Schwinger, J., Smallman, T. L., Smith, S. M., Sospedra-Alfonso, R., Steinhoff, T., Sun, Q., Sutton, A. J., Séférian, R., Takao, S., Tatebe, H., Tian, H., Tilbrook, B., Torres, O., Tourigny, E., Tsujino, H., Tubiello, F., van der Werf, G., Wanninkhof, R., Wang, X., Yang, D., Yang, X., Yu, Z., Yuan, W., Yue, X., Zaehle, S., Zeng, N., and Zeng, J., 2025: Global Carbon Budget 2024, Earth Syst. Sci. Data, 17, 965–1039, https://doi.org/10.5194/essd-17-965-2025.
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Jin, Y., R. F. Keeling, B. B. Stephens, M. C. Long, P. K. Patra, C. Rödenbeck, E. J. Morgan, E. A. Kort, and C. Sweeney, 2024: Improved atmospheric constraints on Southern Ocean CO2 exchange. PNAS, doi: 10.1073/pnas.2309333121.
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Jin, Y., Stephens, B. B., Long, M. C., Chandra, N., Chevallier, F., Hooghiem, J. J. D., Luijkx, I. T., Maksyutov, S., Morgan, E. J., Niwa, Y., Patra, P. K., Rödenbeck, C., and Vance, J., 2025: The Atmospheric Potential Oxygen forward Model Intercomparison Project (APO-MIP1): evaluating simulated atmospheric transport of air-sea gas exchange tracers and APO flux products, Geosci. Model Dev., 18, 5937–5969, https://doi.org/10.5194/gmd-18-5937-2025.
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Krysztofiak G, Catoire V, Dudok de Wit T, Kinnison DE, Ravishankara AR, Brocchi V, Atlas E, Bozem H, Commane R, D’Amato F, Daube B, Diskin GS, Engel A, Friedl-Vallon F, Hintsa E, Hurst DF, Hoor P, Jegou F, Jucks KW, Kleinböhl A, Küllmann H, Kort EA, McKain K, Moore FL, Obersteiner F, Ramos YG, Schuck T, Toon GC, Viciani S, Wetzel G, Williams J, Wofsy SC. N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987–2018. Atmosphere. 2023; 14(3):585. https://doi.org/10.3390/atmos14030585
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Laughner, J. L., Roche, S., Kiel, M., Toon, G. C., Wunch, D., Baier, B. C., Biraud, S., Chen, H., Kivi, R., Laemmel, T., McKain, K., Quéhé, P.-Y., Rousogenous, C., Stephens, B. B., Walker, K., and Wennberg, P. O.: A new algorithm to generate a priori trace gas profiles for the GGG2020 retrieval algorithm, Atmos. Meas. Tech., 16, 1121–1146, https://doi.org/10.5194/amt-16-1121-2023, 2023.
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Le Quéré, C., Andrew, R. M., Friedlingstein, P., Sitch, S., Hauck, J., Pongratz, J., Pickers, P. A., Korsbakken, J. I., Peters, G. P., Canadell, J.G., Arneth, A., Arora, V. K., Barbero, L., Bastos, A., Bopp, L., Chevallier,F., Chini, L. P., Ciais, P., Doney, S. C., Gkritzalis, T., Goll, D. S.,Harris, I., Haverd, V., Hoffman, F. M., Hoppema, M., Houghton, R. A., Hurtt,G., Ilyina, T., Jain, A. K., Johannessen, T., Jones, C. D., Kato, E.,Keeling, R. F., Goldewijk, K. K., Landschützer, P., Lefèvre, N., Lienert,S., Liu, Z., Lombardozzi, D., Metzl, N., Munro, D. R., Nabel, J. E. M. S.,Nakaoka, S.-I., Neill, C., Olsen, A., Ono, T., Patra, P., Peregon, A.,Peters, W., Peylin, P., Pfeil, B., Pierrot, D., Poulter, B., Rehder, G.,Resplandy, L., Robertson, E., Rocher, M., Rödenbeck, C., Schuster, U.,Schwinger, J., Séférian, R., Skjelvan, I., Steinhoff, T., Sutton, A., Tans,P. P., Tian, H., Tilbrook, B., Tubiello, F. N., van der Laan-Luijkx, I. T.,van der Werf, G. R., Viovy, N., Walker, A. P., Wiltshire, A. J., Wright, R.,Zaehle, S., and Zheng, B., 2018: Global Carbon Budget 2018. Earth Syst. Sci. Data,10, 2141-2194, doi: 10.5194/essd-10-2141-2018.
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Liu, J., L. Baskaran, K. Bowman, D. Schimel, A. A. Bloom, N. C. Parazoo, T. Oda, D. Carroll, D. Menemenlis, J. Joiner, R. Commane, B. Daube, L. V. Gatii, K. McKain, J. Miller, B. B. Stephens, C. Sweeney, and S. Wofsy, 2021: Carbon Monitoring System Flux Net Biosphere Exchange 2020 (CMS-Flux NBE 2020). Earth Syst. Sci. Data, 13, 299–330, doi: 10.5194/essd-13-299-2021.
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Long, M. C., B. B. Stephens, K. McKain, C. Sweeney, R. F. Keeling, E. A. Kort, E. J. Morgan, J, D, Bent, N. Chandra, F. Chevallier, R. Commane, B. C. Daube, P. B. Krummel, Z. Loh, I. T. Luijkx, D. Munro, P. Patra, W. Peters, M. Ramonet, C. R. Stavert, P. Tans, and S. C. Wofsy, 2021, "Strong Southern Ocean carbon uptake evident in airborne observations
https://www.science.org/doi/10.1126/science.abi4355," Science, 2 Dec 2021, DOI: 10.1126/science.abi4355.
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Lyu, K., Liu, X., and Kärcher, B., 2025: Exploring sources of ice crystals in cirrus clouds: comparative analysis of two ice nucleation schemes in CAM6, Atmos. Chem. Phys., 25, 15369–15388, https://doi.org/10.5194/acp-25-15369-2025.
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McCoy, I. L., D. T. McCoy, R. Wood, L. Regayre, D. Watson-Parris, D. P. Grosvenor, J. P. Mulcahy, Y. Hu, F. A.-M. Bender, P. R. Field, K. S. Carslaw, and H. Gordon, 2020: The hemispheric contrast in cloud microphysical properties constrains aerosol forcing. Earth, Atmospheric, and Planetary Sciences, 117(32), 18998-19006, doi: 10.1073/pnas.1922502117.
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Morgan, E. J., Stephens, B. B., Long, M. C., Keeling, R. F., Bent, J. D., McKain, K., et al (2019). Summertime Atmospheric Boundary Layer Gradients of O2 and CO2 over the Southern Ocean. Journal of Geophysical Research: Atmospheres, 124. https://doi.org/10.1029/2019JD031479
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Nevison, C. D., Liang, Q., Newman, P. A., Stephens, B. B., Dutton, G., Lan, X., Commane, R., Gonzalez, Y., and Kort, E.. 2024: Observational and model evidence for a prominent stratospheric influence on variability in tropospheric nitrous oxide, Atmos. Chem. Phys., 24, 10513–10529, https://doi.org/10.5194/acp-24-10513-2024.
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Ngo, D., Diao, M., Patnaude, R. J., Woods, S., and Diskin, G., 2025: Aerosol–cloud interactions in cirrus clouds based on global-scale airborne observations and machine learning models, Atmos. Chem. Phys., 25, 7007–7036, https://doi.org/10.5194/acp-25-7007-2025.
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Patnaude, R., Diao, M., Liu, X., and Chu, S., 2021: Effects of thermodynamics, dynamics and aerosols on cirrus clouds based on in situ observations and NCAR CAM6, Atmos. Chem. Phys., 21, 1835–1859, doi: 10.5194/acp-21-1835-2021.
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Roozitalab, B., Hornbrook, R. S., Kinnison, D. E., Fernandez, R. P., Gaubert, B., Cuevas, C. A., et al. (2025). Impacts of socio-economic development scenarios on long-term oceanic emissions and abundances of atmospheric bromoform and dibromomethane. Journal of Geophysical Research: Atmospheres, 130, e2025JD044790. https://doi.org/10.1029/2025JD044790
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Roozitalab, B., L. K. Emmons, R. S. Hornbrook, D. E. Kinnison, R. P. Fernandez, Q. Li, A. Saiz-Lopez, R. Hossaini, C. A. Cuevas, A. J. Hills, S. A. Montzka, D. R. Blake, W. H. Brune, P. R. Veres, and E. C. Apel, 2024: Measurements and Modeling of the Interhemispheric Differences of Atmospheric Chlorinated Very Short-Lived Substances. Journal of Geophysical Research: Atmospheres, , 129, e2023JD039518, doi: 10.1029/2023JD039518.
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Stephens, B. B., E. J. Morgan, J. D. Bent, R. F. Keeling, A. S. Watt, S. R. Shertz, and B. C. Daube, 2021: Airborne measurements of oxygen concentration from the surface to the lower stratosphere and pole to pole. Atmos. Meas. Tech.,14, 2543–2574, doi: 10.5194/amt-14-2543-202.
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Stephens, B., M. Long, R. Keeling, E. Kort, C. Sweeney, E. Apel, E. Atlas, S. Beaton, J. Bent, N. Blake, J. Bresch, J. Casey, B. Daube, M. Diao, E. Diaz, H. Dierssen, V. Donets, B. Gao, M. Gierach, R. Green, J. Haag, M. Hayman, A. Hills, M. Hoecker-Martínez, S. Honomichl, R. Hornbrook, J. Jensen, R. Li, I. McCubbin, K. McKain, E. Morgan, S. Nolte, J. Powers, B. Rainwater, K. Randolph, M. Reeves, S. Schauffler, M. Smith, K. Smith, J. Stith, G. Stossmeister, D. Toohey, and A. Watt, 2018: The O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) Study. Bull. Amer. Meteor. Soc. doi:10.1175/BAMS-D-16-0206.1.
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Yun, J., Liu, J., Byrne, B., Weir, B., Ott, L. E., McKain, K., Baier, B. C., Gatti, L. V., and Biraud, S. C., 2025: Quantification of regional net CO2 flux errors in the Orbiting Carbon Observatory-2 (OCO-2) v10 model intercomparison project (MIP) ensemble using airborne measurements, Atmos. Chem. Phys., 25, 1725–1748, https://doi.org/10.5194/acp-25-1725-2025.
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