Christoph Andrea Keller

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Christoph Andrea Keller

  • SCIENTIST
  • 301.614.6945
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: UNIVERSITIES SPACE RESEARCH ASSOCIATION
  • Research Interests

    Tropospheric composition

    Dr. Christoph Keller’s research is focused on improving the representation of reactive trace gases in atmospheric models. He uses the GEOS-Chem chemistry module within the GEOS Earth System model to simulate and better understand the evolution of air pollutants such as ozone and nitrogen dioxide. He uses atmospheric observations to further improve model constraints, in particular emissions. He also develops new methods to emulate processes relevant to atmospheric chemistry based on machine learning.
    Keller is the principal developer of the GEOS composition forecast (GEOS-CF) model. He developed and actively maintains the Harvard-NASA Emissions Component (HEMCO).

     

    Positions/Employment

    1/2016 - Present

    Scientist II

    NASA GMAO / USRA, Greenbelt, Maryland
    • Development of a multispecies data assimilation system for atmospheric constituents (ozone, carbon monoxide, nitrogen dioxide).
    • Development and maintenance of the GEOS-Chem atmospheric chemistry module within GEOS-5.
    2/2012 - 1/2016

    Research Associate

    School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts
    • Development of the Harvard NASA emissions component (HEMCO), a stand-alone software component for calculating emissions in global atmospheric models. Additional information about HEMCO can be found at http://wiki.seas.harvard.edu/geos-chem/index.php/HEMCO.
    • Coupling of the GEOS-Chem chemical transport model to the GEOS-5 Earth System Model.

    Education

    • Ph.D., Atmospheric and Climate Science, EMPA / ETH Zurich (2012)
    • M.Sc., Atmospheric and Climate Science, ETH Zurich (2008)
    • B.Sc., Earth Sciences, ETH Zurich (2006)

    Publications

    Refereed

    Eastham, S. D., M. S. Long, C. A. Keller, et al. E. Lundgren, R. M. Yantosca, J. Zhuang, C. Li, C. J. Lee, M. Yannetti, B. M. Auer, T. L. Clune, J. Kouatchou, W. M. Putman, M. A. Thompson, A. L. Trayanov, A. M. Molod, R. V. Martin, and D. J. Jacob. 2018. "GEOS-Chem High Performance (GCHP): A next-generation implementation of the GEOS-Chem chemical transport model for massively parallel applications." Geoscientific Model Development Discussions, 1-18 (Accepted) [10.5194/gmd-2018-55]

    Eastham, S. D., M. S. Long, C. A. Keller, et al. E. Lundgren, R. M. Yantosca, J. Zhuang, C. Li, C. J. Lee, M. Yannetti, B. M. Auer, T. L. Clune, J. Kouatchou, W. M. Putman, M. A. Thompson, A. L. Trayanov, A. M. Molod, R. V. Martin, and D. J. Jacob. 2018. "GEOS-Chem High Performance (GCHP v11-02c): a next-generation implementation of the GEOS-Chem chemical transport model for massively parallel applications." Geoscientific Model Development, 11 (7): 2941-2953 [10.5194/gmd-11-2941-2018]

    Hu, L., C. A. Keller, M. S. Long, et al. T. Sherwen, B. Auer, A. Da Silva, J. E. Nielsen, S. Pawson, M. A. Thompson, A. L. Trayanov, K. R. Travis, S. K. Grange, M. J. Evans, and D. J. Jacob. 2018. "Global simulation of tropospheric chemistry at 12.5 km resolution: performance and evaluation of the GEOS-Chem chemical module (v10-1) within the NASA GEOS Earth system model (GEOS-5 ESM)." Geoscientific Model Development, 11 (11): 4603-4620 [10.5194/gmd-11-4603-2018]

    Long, M. S., R. Yantosca, J. E. Nielsen, et al. C. A. Keller, A. da Silva, M. P. Sulprizio, S. Pawson, and D. J. Jacob. 2015. "Development of a grid-independent GEOS-Chem chemical transport model (v9-02) as an atmospheric chemistry module for Earth system models." Geosci. Model Dev., 8 (3): 595-602 [10.5194/gmd-8-595-2015]

    Keller, C. A., M. S. Long, R. M. Yantosca, et al. A. M. Da Silva, S. Pawson, and D. J. Jacob. 2014. "HEMCO v1.0: a versatile, ESMF-compliant component for calculating emissions in atmospheric models." Geoscientific Model Development, 7 (4): 1409-1417 [10.5194/gmd-7-1409-2014]

    Publications

    Refereed

    Eastham, S. D., M. S. Long, C. A. Keller, et al. E. Lundgren, R. M. Yantosca, J. Zhuang, C. Li, C. J. Lee, M. Yannetti, B. M. Auer, T. L. Clune, J. Kouatchou, W. M. Putman, M. A. Thompson, A. L. Trayanov, A. M. Molod, R. V. Martin, and D. J. Jacob. 2018. "GEOS-Chem High Performance (GCHP): A next-generation implementation of the GEOS-Chem chemical transport model for massively parallel applications." Geoscientific Model Development Discussions (Accepted) 1-18 [10.5194/gmd-2018-55]

    Eastham, S. D., M. S. Long, C. A. Keller, et al. E. Lundgren, R. M. Yantosca, J. Zhuang, C. Li, C. J. Lee, M. Yannetti, B. M. Auer, T. L. Clune, J. Kouatchou, W. M. Putman, M. A. Thompson, A. L. Trayanov, A. M. Molod, R. V. Martin, and D. J. Jacob. 2018. "GEOS-Chem High Performance (GCHP v11-02c): a next-generation implementation of the GEOS-Chem chemical transport model for massively parallel applications." Geoscientific Model Development 11 (7): 2941-2953 [10.5194/gmd-11-2941-2018]

    Hu, L., C. A. Keller, M. S. Long, et al. T. Sherwen, B. Auer, A. Da Silva, J. E. Nielsen, S. Pawson, M. A. Thompson, A. L. Trayanov, K. R. Travis, S. K. Grange, M. J. Evans, and D. J. Jacob. 2018. "Global simulation of tropospheric chemistry at 12.5 km resolution: performance and evaluation of the GEOS-Chem chemical module (v10-1) within the NASA GEOS Earth system model (GEOS-5 ESM)." Geoscientific Model Development 11 (11): 4603-4620 [10.5194/gmd-11-4603-2018]

    Long, M. S., R. Yantosca, J. E. Nielsen, et al. C. A. Keller, A. da Silva, M. P. Sulprizio, S. Pawson, and D. J. Jacob. 2015. "Development of a grid-independent GEOS-Chem chemical transport model (v9-02) as an atmospheric chemistry module for Earth system models." Geosci. Model Dev. 8 (3): 595-602 [10.5194/gmd-8-595-2015]

    Keller, C. A., M. S. Long, R. M. Yantosca, et al. A. M. Da Silva, S. Pawson, and D. J. Jacob. 2014. "HEMCO v1.0: a versatile, ESMF-compliant component for calculating emissions in atmospheric models." Geoscientific Model Development 7 (4): 1409-1417 [10.5194/gmd-7-1409-2014]

                                                                                                                                                                                            
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