Dr. Natasha M Johnson

Dr. Natasha M Johnson

  • SUPV AST, SOLAR SYSTEMS ANALYSIS
  • 301.286.3919
  • NASA/GSFC
  • Mail Code: 691
  • Greenbelt , MD 20771
  • Employer: NASA
  • Research Interests

    Gas-Grain Reactions

    I am interested in gas-grain reactions that occur in different environments such as found during nebular materials interactions, planetary surfaces reacting with their respectives atmospheres (emphasis Venus), and changes in crustal mineralogy whether at depth or on the surface.

    Venus Surface Mineralogy

    I am curious about the surface mineraolgy of Venus. We currently only have limited elemental knowledge of the surface and modeled mineralogical data. I perform high temperature/pressure experiments that mimic Venus atmospheric conditions at the surface (470C/96bar). In particular, I would like to continue to explore the rate of change in the Venus surface mineralogy over time at high temperatures.

    Early Solar Nebula Materials

    This encompases many areas but in particular, we explore the formation of complex hydrocarbons/organics through straightforward gas/surface mediated reactions. This process is expected to occur in the early solar nebula which also encompasses the formation of small particulates such as silicate dust/smoke.

    Positions/Employment

    10/2019 - Present

    Chief, Astrochemistry Laboratory

    NASA Goddard Space Flight Center, Greenbelt, Maryland
    6/2018 - 10/2019

    Associate Chief, Astrochemistry Laboratory

    NASA Goddard Space Flight Center, Greenbelt, Maryland
    2009 - 2018

    Research Scientist, Astrochemistry Laboratory

    NASA Goddard Space Flight Center, Greenbelt, MD
    2007 - 2009

    NASA Postdoctoral Program Resident Management Associate

    NASA Headquarters, Washington, DC

    Planetary Science Division, Astrobiology, R&A Programmatic Support

    2005 - 2007

    Visiting Fellow, Astrochemistry Lab

    USRA/CRESST, NASA Goddard Space Flight Center
    2002 - 2005

    National Research Council (NRC) Research Associate

    NASA, Goddard Space Flight Center
    1997 - 2002

    Graduate Student, Planetary Chemistry Laboratory

    Washington University in St. Louis, St. Louis, Missouri

    Thesis: Tremolite Thermal Decomposition and Water on Venus [advisor: Dr. Bruce Fegley, Jr.]

    1996 - 2000

    Teaching Assistant, Dept. Earth & Planetary Sciences

    Washington University in St. Louis, Missouri

    Courses: Evolution of the Earth, Intro. to Solar System, Thermodynamics, Geochemistry

    1991 - 1996

    Principal Solar Observer/Data Analyst, 60ft Solar Tower

    USC, Mt. Wilson Observatory, California

    Project: High Degree Helioseismology [Dr. Edward Rhodes]

    1990 - 1991

    Undergraduate Research Assistant

    NASA - Arizona Space Grant, Lunar & Planetary Laboratory (LPL), University of Arizona, Tucson

    Project: Glaciation on Mars, crater counting [Mr. Robert Strom]

    1990 - 1990

    COOP Research Position (Dept. Space Physics and Astrophysics)

    Jet Propulsion Laboratory (JPL), Pasadena, CA

    Project: Created computer programs to be used for analysis for data retrived from the Ion plasma experiment (SWOOPS) on the Ulysses spacecraft [supervisor: Dr. Bruce Goldstein]

    1989 - 1989

    PGGURP Summer Intern

    Planetary Geology and Geophysics Undergraduate Research Program (PGGURP), Jet Propulsion Laboratory (JPL), Pasadena, CA

    Project: Image database management during Voyager’s encounter with Neptune

    1986 - 1993

    Museum Guide

    Griffith Observatory, Los Angeles, CA

    Education

    2002 - Ph.D. (Earth & Planetary Sciences) Washington University in St. Louis
    1998 - A.M. (Earth & Planetary Sciences) Washington University in St. Louis
    1996 - B.A., cum laude (Math/Geology/Comp. Sci./Physics) University of Arizona, Tucson

    Professional Societies

    The Meteoritical Society, 2000 - Present
    American Astronomical Society-Division of Planetary Sciences, 1999 - Present
    American Geophysical Union, 2001 - Present
    Geological Society of America, 2001 - Present

    Selected Publications

    Refereed

    Johnson, N. M., and M. R. Oliveira. 2019. "Venus Atmospheric Composition In Situ Data: A Compilation." Earth and Space Science, 6 (7): 1299-1318 [10.1029/2018ea000536]

    Glaze, L. S., J. B. Garvin, B. Robertson, et al. N. M. Johnson, M. J. Amato, J. Thompson, C. Goodloe, and D. Everett. 2017. "DAVINCI: Deep atmosphere venus investigation of noble gases, chemistry, and imaging." 2017 IEEE Aerospace Conference, [10.1109/aero.2017.7943923]

    Nuth, J. A., N. M. Johnson, F. T. Ferguson, and A. Carayon. 2016. "Gas/solid carbon branching ratios in surface-mediated reactions and the incorporation of carbonaceous material into planetesimals." Meteoritics & Planetary Science, 51 (7): 1310-1322 [10.1111/maps.12666]

    Nuth, J. A., N. M. Johnson, F. T. Ferguson, F. J. Rietmeijer, and H. G. Hill. 2016. "Great new insights from failed experiments, unanticipated results and embracing controversial observations." Chemie der Erde - Geochemistry, 76 (1): 1-12 [10.1016/j.chemer.2015.09.002]

    Ferguson, F. T., J. A. Nuth, and N. M. Johnson. 2015. "On the Use of Fourier Transform Infrared (FT-IR) Spectroscopy and Synthetic Calibration Spectra to Quantify Gas Concentrations in a Fischer-Tropsch Catalyst System." Applied Spectroscopy, 69 (10): 1157-1169 [10.1366/15-07950]

    Nuth, J., N. Johnson, and H. Hill. 2014. "CO Self-Shielding as a Mechanism to Make 16O-Enriched Solids in the Solar Nebula." Challenges, 5 (1): 152-158 [10.3390/challe5010152]

    Nuth, J. A., and N. M. Johnson. 2012. "Complex Protostellar Chemistry." Science, 336 (6080): 424-425 [10.1126/science.1219709]

    Burton, A. S., J. E. Elsila, M. P. Callahan, et al. M. G. Martin, D. P. Glavin, N. M. Johnson, and J. P. Dworkin. 2012. "A propensity for n-ω-amino acids in thermally altered Antarctic meteorites ." Meteoritics and Planetary Science , 47: 374-386 [10.1111/j.1945-5100.2012.01400.x ]

    Johnson, N. M., J. E. Elsila, M. Kopstein, and J. A. Nuth. 2012. "Carbon isotopic fractionation in Fischer-Tropsch-type reactions and relevance to meteorite organics." Meteoritics & Planetary Science, 47: 1029-1034.

    Kimura, Y., J. A. Nuth, N. M. Johnson, et al. K. D. Farmer, K. P. Roberts, and S. R. Hussaini. 2010. "Synthesis of stacked-cup carbon nanotubes in a metal free low temperature system." Nanoscience and Nanotechnology Letters, 3: 4 - 10.

    Nuth, J. A., Y. Kimura, C. Lucas, F. Ferguson, and N. M. Johnson. 2010. "The Formation of Graphite Whiskers in the Primitive Solar Nebula." The Astrophysical Journal Letters, 710: L98 [Full Text (Link)] [10.1088/2041-8205/710/1/L98]

    Nuth, J. A., N. M. Johnson, and S. Manning. 2008. "A Self-Perpetuating Catalyst for the Production of Complex Organic Molecules in Protostellar Nebulae." The Astrophysical Journal, 673: L225 [Full Text (Link)] [10.1086/528741]

    Nuth, J. A., and N. M. Johnson. 2006. "Crystalline silicates in comets: How did they form?" Icarus, 180: 243 [Full Text (Link)] [10.1016/j.icarus.2005.09.003]

    Nuth, J. A., G. M. Wilkinson, N. M. Johnson, and M. Dwyer. 2006. "A Mechanism for the Equilibrium Growth of Mineral Crystals in AGB Stars and Red Giants on 105 yr Timescales." The Astrophysical Journal, 644: 1164 [Full Text (Link)] [10.1086/503700]

    Ferguson, F. T., J. A. Nuth, and N. M. Johnson. 2004. "Thermogravimetric Measurement of the Iron Vapor Pressure from 1575K to 1975K." J Chem Engin Data, 49: 497 - 501.

    Johnson, N. M., and B. Fegley. 2003. "Longevity of fluorine-bearing tremolite on Venus." Icarus, 165 (2): 340-348 [10.1016/s0019-1035(03)00212-4]

    Johnson, N. M., and B. Fegley. 2003. "Tremolite decomposition on Venus II. Products, kinetics, and mechanism." Icarus, 164 (2): 317-333 [10.1016/s0019-1035(03)00102-7]

    Johnson, N. M. 2000. "Water on Venus: New Insights from Tremolite Decomposition." Icarus, 146 (1): 301-306 [10.1006/icar.2000.6392]

    Selected Publications

    Refereed

    Johnson, N. M., and M. R. Oliveira. 2019. "Venus Atmospheric Composition In Situ Data: A Compilation." Earth and Space Science 6 (7): 1299-1318 [10.1029/2018ea000536]

    Glaze, L. S., J. B. Garvin, B. Robertson, et al. N. M. Johnson, M. J. Amato, J. Thompson, C. Goodloe, and D. Everett. 2017. "DAVINCI: Deep atmosphere venus investigation of noble gases, chemistry, and imaging." 2017 IEEE Aerospace Conference [10.1109/aero.2017.7943923]

    Nuth, J. A., N. M. Johnson, F. T. Ferguson, and A. Carayon. 2016. "Gas/solid carbon branching ratios in surface-mediated reactions and the incorporation of carbonaceous material into planetesimals." Meteoritics & Planetary Science 51 (7): 1310-1322 [10.1111/maps.12666]

    Nuth, J. A., N. M. Johnson, F. T. Ferguson, F. J. Rietmeijer, and H. G. Hill. 2016. "Great new insights from failed experiments, unanticipated results and embracing controversial observations." Chemie der Erde - Geochemistry 76 (1): 1-12 [10.1016/j.chemer.2015.09.002]

    Ferguson, F. T., J. A. Nuth, and N. M. Johnson. 2015. "On the Use of Fourier Transform Infrared (FT-IR) Spectroscopy and Synthetic Calibration Spectra to Quantify Gas Concentrations in a Fischer-Tropsch Catalyst System." Applied Spectroscopy 69 (10): 1157-1169 [10.1366/15-07950]

    Nuth, J., N. Johnson, and H. Hill. 2014. "CO Self-Shielding as a Mechanism to Make 16O-Enriched Solids in the Solar Nebula." Challenges 5 (1): 152-158 [10.3390/challe5010152]

    Nuth, J. A., and N. M. Johnson. 2012. "Complex Protostellar Chemistry." Science 336 (6080): 424-425 [10.1126/science.1219709]

    Burton, A. S., J. E. Elsila, M. P. Callahan, et al. M. G. Martin, D. P. Glavin, N. M. Johnson, and J. P. Dworkin. 2012. "A propensity for n-ω-amino acids in thermally altered Antarctic meteorites ." Meteoritics and Planetary Science 47 374-386 [10.1111/j.1945-5100.2012.01400.x ]

    Johnson, N. M., J. E. Elsila, M. Kopstein, and J. A. Nuth. 2012. "Carbon isotopic fractionation in Fischer-Tropsch-type reactions and relevance to meteorite organics." Meteoritics & Planetary Science 47 1029-1034.

    Kimura, Y., J. A. Nuth, N. M. Johnson, et al. K. D. Farmer, K. P. Roberts, and S. R. Hussaini. 2010. "Synthesis of stacked-cup carbon nanotubes in a metal free low temperature system." Nanoscience and Nanotechnology Letters 3 4 - 10

    Nuth, J. A., Y. Kimura, C. Lucas, F. Ferguson, and N. M. Johnson. 2010. "The Formation of Graphite Whiskers in the Primitive Solar Nebula." The Astrophysical Journal Letters 710 L98 [Full Text (Link)] [10.1088/2041-8205/710/1/L98]

    Nuth, J. A., N. M. Johnson, and S. Manning. 2008. "A Self-Perpetuating Catalyst for the Production of Complex Organic Molecules in Protostellar Nebulae." The Astrophysical Journal 673 L225 [Full Text (Link)] [10.1086/528741]

    Nuth, J. A., and N. M. Johnson. 2006. "Crystalline silicates in comets: How did they form?" Icarus 180 243 [Full Text (Link)] [10.1016/j.icarus.2005.09.003]

    Nuth, J. A., G. M. Wilkinson, N. M. Johnson, and M. Dwyer. 2006. "A Mechanism for the Equilibrium Growth of Mineral Crystals in AGB Stars and Red Giants on 105 yr Timescales." The Astrophysical Journal 644 1164 [Full Text (Link)] [10.1086/503700]

    Ferguson, F. T., J. A. Nuth, and N. M. Johnson. 2004. "Thermogravimetric Measurement of the Iron Vapor Pressure from 1575K to 1975K." J Chem Engin Data 49 497 - 501

    Johnson, N. M., and B. Fegley. 2003. "Longevity of fluorine-bearing tremolite on Venus." Icarus 165 (2): 340-348 [10.1016/s0019-1035(03)00212-4]

    Johnson, N. M., and B. Fegley. 2003. "Tremolite decomposition on Venus II. Products, kinetics, and mechanism." Icarus 164 (2): 317-333 [10.1016/s0019-1035(03)00102-7]

    Johnson, N. M. 2000. "Water on Venus: New Insights from Tremolite Decomposition." Icarus 146 (1): 301-306 [10.1006/icar.2000.6392]

                                                                                                                                                                                            
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