Krzysztof Wargan

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Krzysztof Wargan

  • RESEARCH SCIENTIST
  • 301.614.5521
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: SCIENCE SYSTEMS AND APPLICATIONS INC
  • Research Interests

    Atmospheric ozone

     

    Constituent data assimilation

     

    Upper troposphere - lower stratosphere transport and dynamics

     

    Positions/Employment

    2/2012 - Present

    Chief Research Scientist

    Science Systems and Applications, Global Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt, MD 20771 USA  
    9/2010 - 1/2012

    Research Scientist

    Science Applications International Corporation, Global Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt, MD 20771 USA  
    6/2009 - 8/2010

    Research Assistant

    Imperial College London, Department of Physics Imperial College London London United Kingdom  
    1/2002 - 2/2009

    Support scientist

    Science Applications International Corporation, Global Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt, MD 20771 USA  

    Education

     2001: PhD in mathematics, the George Washington University. Washington, DC

    1994: Master's degree in mathematics, University of Gdańsk, Gdańsk, Poland

    Professional Service

    SPARC Reanalysis Intercomparison Project: point of contact for NASA reanalyses

    Selected Publications

    Refereed

    Coy, L., K. Wargan, A. M. Molod, W. R. McCarty, and S. Pawson. 2016. "Structure and Dynamics of the Quasi-Biennial Oscillation in MERRA-2." J. Climate, 29:14: 5339-5354 [10.1175/jcli-d-15-0809.1]

    Wargan, K., and L. Coy. 2016. "Strengthening of the Tropopause Inversion Layer During the 2009 Sudden Stratospheric Warming: A MERRA-2 Study." Journal of the Atmospheric Sciences, [10.1175/jas-d-15-0333.1]

    Ott, L. E., B. N. Duncan, A. M. Thompson, et al. G. Diskin, Z. Fasnacht, A. O. Langford, M. Lin, A. M. Molod, J. E. Nielsen, S. E. Pusede, K. Wargan, A. J. Weinheimer, and Y. Yoshida. 2016. "Frequency and impact of summertime stratospheric intrusions over Maryland during DISCOVER-AQ (2011): New evidence from NASA's GEOS-5 simulations." J. Geophys. Res. Atmos., [10.1002/2015jd024052]

    Olsen, M. A., K. Wargan, and S. Pawson. 2016. "Tropospheric column ozone response to ENSO in GEOS-5 assimilation of OMI and MLS ozone data." Atmos. Chem. Phys., 16 (11): 7091-7103 [10.5194/acp-16-7091-2016]

    Wargan, K., S. Pawson, M. A. Olsen, et al. J. C. Witte, A. R. Douglass, J. R. Ziemke, S. E. Strahan, and J. E. Nielsen. 2015. "The Global Structure of Upper Troposphere-Lower Stratosphere Ozone in GEOS-5: A Multi-Year Assimilation of EOS Aura Data." J. Geophys. Res. - Atmos, 120: 2013-2036 [10.1002/2014JD022493]

    Ziemke, J. R., M. A. Olsen, J. C. Witte, et al. A. R. Douglass, S. E. Strahan, K. Wargan, X. Liu, M. Schoeberl, K. Yang, T. Kaplan, S. Pawson, B. N. Duncan, P. Newman, P. K. Bhartia, and M. K. Heney. 2014. "Assessment and applications of NASA ozone data products derived from Aura OMI/MLS satellite measurements in context of the GMI chemical transport model." J. Geophys. Res. Atmos., 119 (9): 5671-5699 [10.1002/2013JD020914]

    Remsberg, E., M. Natarajan, T. Fairlie, et al. K. Wargan, S. Pawson, L. Coy, G. Lingenfelser, and G. Kim. 2013. "On the inclusion of Limb Infrared Monitor of the Stratosphere version 6 ozone in a data assimilation system." J. Geophys. Res. Atmos., 118 (14): 7982-8000 [10.1002/jgrd.50566]

    Doughty, D. C., A. M. Thompson, M. R. Schoeberl, et al. I. Stajner, K. Wargan, and W. C. Hui. 2011. "An intercomparison of tropospheric ozone retrievals derived from two Aura instruments and in-situ measurements in western North America in 2006." J. Geophys. Res., doi: 116: D06303 [10.1029/2010JD014703]

    Wargan, K., S. Pawson, I. Stajner, and V. Thouret. 2010. "Spatial structure of assimilated ozone in the upper troposphere and lower stratosphere." J. Geophys. Res., 115 (D24): D24316 [10.1029/2010JD013941]

    Stajner, I., K. Wargan, S. Pawson, et al. H. Hayashi, L. P. Chang, R. C. Hudman, L. Froidevaux, N. Livesey, P. Levelt, A. M. Thompson, D. W. Tarasick, R. Stuebi, S. B. Andersen, M. Yela, G. Koenig-Laslo, F. J. Schmidlin, and J. C. Witte. 2008. "Assimilated Ozone from EOS-Aura: Evaluation of the Tropopause Region and Tropospheric Columns." J. Geophys. Res.-Atmos., 113: D15S32 [doi:10.1029/2007JD008863]

    Stajner, I., K. Wargan, L. Chang, et al. H. Hayashi, S. Pawson, and H. Nakajima. 2006. "Assimilation of ozone profiles from the Improved Limb Atmospheric Spectrometer-II: Study of Antarctic ozone." JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 111 (D11): [10.1029/2005JD006448]

    Wargan, K., I. Stajner, S. Pawson, R. Rood, and W. Tan. 2005. "Assimilation of ozone data from the Michelson Interferometer for Passive Atmospheric Sounding." QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 131 (611): [10.1256/qj.04.184]

    Stajner, I., and K. Wargan. 2004. "Antarctic stratospheric ozone from the assimilation of occultation data." GEOPHYSICAL RESEARCH LETTERS, 31 (18): [10.1029/2004GL020846]

    Non-Refereed

    Bosilovich, M. G., S. R. Akella, L. Coy, et al. R. I. Cullather, C. S. Draper, R. Gelaro, R. M. Kovach, Q. Liu, A. M. Molod, P. M. Norris, K. Wargan, C. Yang, R. H. Reichle, L. L. Takacs, Y. V. Vikhliaev, S. C. Bloom, A. Collow, S. Firth, G. J. Labow, G. S. Partyka, S. Pawson, O. Reale, S. D. Schubert, and M. J. Suarez. 2015. "MERRA-2: Initial Evaluation of the Climate." NASA Technical Report Series on Global Modeling and Data Assimilation 43 (NASA/TM–2015–10): 139 pp.

    Gelaro, R., W. M. Putman, S. Pawson, et al. C. S. Draper, A. M. Molod, P. M. Norris, L. E. Ott, N. C. Privé, O. Reale, D. Achuthavarier, M. G. Bosilovich, V. J. Buchard, W. C. Chao, L. Coy, R. I. Cullather, A. M. Da Silva, A. S. Darmenov, R. M. Errico, M. Fuentes, M.-J. Kim, R. D. Koster, W. R. Mccarty, J. Nattala, G. S. Partyka, S. D. Schubert, G. R. Vernieres, Y. V. Vikhliaev, and K. Wargan. 2015. "Evaluation of the 7-km GEOS-5 Nature Run." NASA Technical Report Series on Global Modeling and Data Assimilation 36 (NASA/TM-2014-104606):

    Selected Publications

    Refereed

    Coy, L., K. Wargan, A. M. Molod, W. R. McCarty, and S. Pawson. 2016. "Structure and Dynamics of the Quasi-Biennial Oscillation in MERRA-2." J. Climate 29:14 5339-5354 [10.1175/jcli-d-15-0809.1]

    Wargan, K., and L. Coy. 2016. "Strengthening of the Tropopause Inversion Layer During the 2009 Sudden Stratospheric Warming: A MERRA-2 Study." Journal of the Atmospheric Sciences [10.1175/jas-d-15-0333.1]

    Ott, L. E., B. N. Duncan, A. M. Thompson, et al. G. Diskin, Z. Fasnacht, A. O. Langford, M. Lin, A. M. Molod, J. E. Nielsen, S. E. Pusede, K. Wargan, A. J. Weinheimer, and Y. Yoshida. 2016. "Frequency and impact of summertime stratospheric intrusions over Maryland during DISCOVER-AQ (2011): New evidence from NASA's GEOS-5 simulations." J. Geophys. Res. Atmos. [10.1002/2015jd024052]

    Olsen, M. A., K. Wargan, and S. Pawson. 2016. "Tropospheric column ozone response to ENSO in GEOS-5 assimilation of OMI and MLS ozone data." Atmos. Chem. Phys. 16 (11): 7091-7103 [10.5194/acp-16-7091-2016]

    Wargan, K., S. Pawson, M. A. Olsen, et al. J. C. Witte, A. R. Douglass, J. R. Ziemke, S. E. Strahan, and J. E. Nielsen. 2015. "The Global Structure of Upper Troposphere-Lower Stratosphere Ozone in GEOS-5: A Multi-Year Assimilation of EOS Aura Data." J. Geophys. Res. - Atmos 120 2013-2036 [10.1002/2014JD022493]

    Ziemke, J. R., M. A. Olsen, J. C. Witte, et al. A. R. Douglass, S. E. Strahan, K. Wargan, X. Liu, M. Schoeberl, K. Yang, T. Kaplan, S. Pawson, B. N. Duncan, P. Newman, P. K. Bhartia, and M. K. Heney. 2014. "Assessment and applications of NASA ozone data products derived from Aura OMI/MLS satellite measurements in context of the GMI chemical transport model." J. Geophys. Res. Atmos. 119 (9): 5671-5699 [10.1002/2013JD020914]

    Remsberg, E., M. Natarajan, T. Fairlie, et al. K. Wargan, S. Pawson, L. Coy, G. Lingenfelser, and G. Kim. 2013. "On the inclusion of Limb Infrared Monitor of the Stratosphere version 6 ozone in a data assimilation system." J. Geophys. Res. Atmos. 118 (14): 7982-8000 [10.1002/jgrd.50566]

    Doughty, D. C., A. M. Thompson, M. R. Schoeberl, et al. I. Stajner, K. Wargan, and W. C. Hui. 2011. "An intercomparison of tropospheric ozone retrievals derived from two Aura instruments and in-situ measurements in western North America in 2006." J. Geophys. Res. doi: 116 D06303 [10.1029/2010JD014703]

    Wargan, K., S. Pawson, I. Stajner, and V. Thouret. 2010. "Spatial structure of assimilated ozone in the upper troposphere and lower stratosphere." J. Geophys. Res. 115 (D24): D24316 [10.1029/2010JD013941]

    Stajner, I., K. Wargan, S. Pawson, et al. H. Hayashi, L. P. Chang, R. C. Hudman, L. Froidevaux, N. Livesey, P. Levelt, A. M. Thompson, D. W. Tarasick, R. Stuebi, S. B. Andersen, M. Yela, G. Koenig-Laslo, F. J. Schmidlin, and J. C. Witte. 2008. "Assimilated Ozone from EOS-Aura: Evaluation of the Tropopause Region and Tropospheric Columns." J. Geophys. Res.-Atmos. 113 D15S32 [doi:10.1029/2007JD008863]

    Stajner, I., K. Wargan, L. Chang, et al. H. Hayashi, S. Pawson, and H. Nakajima. 2006. "Assimilation of ozone profiles from the Improved Limb Atmospheric Spectrometer-II: Study of Antarctic ozone." JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 111 (D11): [10.1029/2005JD006448]

    Wargan, K., I. Stajner, S. Pawson, R. Rood, and W. Tan. 2005. "Assimilation of ozone data from the Michelson Interferometer for Passive Atmospheric Sounding." QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 131 (611): [10.1256/qj.04.184]

    Stajner, I., and K. Wargan. 2004. "Antarctic stratospheric ozone from the assimilation of occultation data." GEOPHYSICAL RESEARCH LETTERS 31 (18): [10.1029/2004GL020846]

    Non-Refereed

    Bosilovich, M. G., S. R. Akella, L. Coy, et al. R. I. Cullather, C. S. Draper, R. Gelaro, R. M. Kovach, Q. Liu, A. M. Molod, P. M. Norris, K. Wargan, C. Yang, R. H. Reichle, L. L. Takacs, Y. V. Vikhliaev, S. C. Bloom, A. Collow, S. Firth, G. J. Labow, G. S. Partyka, S. Pawson, O. Reale, S. D. Schubert, and M. J. Suarez. 2015. "MERRA-2: Initial Evaluation of the Climate." NASA Technical Report Series on Global Modeling and Data Assimilation 43 (NASA/TM–2015–10) 139 pp.

    Gelaro, R., W. M. Putman, S. Pawson, et al. C. S. Draper, A. M. Molod, P. M. Norris, L. E. Ott, N. C. Privé, O. Reale, D. Achuthavarier, M. G. Bosilovich, V. J. Buchard, W. C. Chao, L. Coy, R. I. Cullather, A. M. Da Silva, A. S. Darmenov, R. M. Errico, M. Fuentes, M.-J. Kim, R. D. Koster, W. R. Mccarty, J. Nattala, G. S. Partyka, S. D. Schubert, G. R. Vernieres, Y. V. Vikhliaev, and K. Wargan. 2015. "Evaluation of the 7-km GEOS-5 Nature Run." NASA Technical Report Series on Global Modeling and Data Assimilation 36 (NASA/TM-2014-104606):

                                                                                                                                                                                            
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