Melissa Grady Trainer

Melissa Grady Trainer

  • SUPV RESEARCH AST, PLANETARY STUDIES
  • 301.614.6104
  • NASA/GSFC
  • Mail Code: 690
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Dr. Melissa Trainer is a Deputy Principal Investigator (PI) for the Dragonfly mission to Saturn's moon Titan, part of the NASA Planetary Science New Frontiers Program.  Dr. Trainer is also the lead for the Dragonfly Mass Spectrometer (DraMS), an instrument supporting the Dragonfly investigation  of Titan's surface composition and characterization of potential prebiotic chemistry.

    Dr. Trainer has been at NASA Goddard Space Flight Center since 2009 as a Research Space Scientist in the Planetary Environments Laboratory. Her research interests include the composition of planetary atmospheres and the production of organic molecules and aerosols via atmospheric synthesis.

    Dr. Trainer has spent more than a decade characterizing the properties of Titan and early Earth aerosol analogs. Her publications on this topic include chemical, optical, and isotopic characterizations of these analogs produced via electric discharge and photochemical irradiation, with recent emphasis on the elemental composition, nitrogen activation, and the influence of trace species such as benzene.

    Dr. Trainer is a science team member on the Sample Analysis at Mars (SAM) experiment aboard the Mars Science Laboratory Mission’s Curiosity Rover, with a focus on the compositional measurements of the Mars atmosphere. She has led the campaign to conduct the first in situ multi-year study of the seasonal variations of the composition of the Mars atmosphere through surface mass spectrometry measurements. She also worked with the SAM team to make the first measurements of the full suite of xenon isotopes in the Mars atmosphere as well as the inventory of other noble gases.

    Dr. Trainer was a Co-Investigator and Deputy Instrument Scientist for the cryogenic sampling inlet and Neutral Mass Spectrometer on the proposed Titan Mare Explorer (TiME) Mission, which completed Phase A study in 2012. She was a Co-Investigator on the Discovery Candidate Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging (DAVINCI) mission, which completed Phase A study in 2016.

    Throughout her career, Dr. Trainer has been active in the NASA Astrobiology community and she participates in several education and public outreach programs. Dr. Trainer has mentored several summer undergraduate students and NASA Postdoctoral Fellows. She currently serves as the Associate Lab Chief of the Planetary Environments Lab.

     

    Positions/Employment

    12/2017 - Present

    Associate Laboratory Chief, Planetary Environments Laboratory

    NASA Goddard Space Flight Center, Greenbelt, MD
    12/2015 - 12/2017

    Assistant Chief for Science, Operations, and Strategic Planning, Planetary Environments Laboratory

    NASA Goddard Space Flight Center, Greenbelt, MD
    3/2009 - Present

    Research Space Scientist

    NASA Goddard Space Flight Center, Greenbelt, MD
    6/2006 - 2/2009

    NASA Astrobiology Institute Postdoctoral Fellow

    NAI at the University of Colorado, Boulder, CO
    8/2000 - 5/2006

    Graduate Research Assistant

    University of Colorado, Boulder, CO

    Education

    PhD in Chemistry, University of Colorado, Boulder, CO                    May 2006

    Dissertation Title: “Laboratory Studies of Organic Haze Aerosols in Simulated Planetary Atmospheres”

    Faculty Advisor:  Prof. Margaret Tolbert

    BA in Chemistry, Franklin and Marshall College, Lancaster, PA      May 2000

             Magna Cum Laude, with a minor in Mathematics

    Professional Societies

    American Geophysical Union (AGU), 2001 - Present
    AAS Division of the Planetary Sciences, 2014 - Present
    American Chemical Society, 2000 - Present

    Professional Service

    • Session Chair for AbSciCon 2008 and Goldschmidt 2012
    • Organizer of Astrobiology Graduate Science Conference 2007
    • Reviewer of scientific manuscripts for several peer-reviewed journals
    • External reviewer and panel member for several NASA grant programs

    Awards

    • NASA Honor Group Achievement Award, MSL Prime Mission Science and Operations Team, 2015
    • NASA Early Career Achievement Medal, 2012
    • NASA Astrobiology Institute Postdoctoral Fellowship, 2006 – 2009
    • NASA Graduate Student Researchers Fellowship, 2002 – 2005
    • Award for Excellence in Teaching, Chemistry Department at CU-Boulder, 2001
    • Richard C. Schiedt Trust for Graduate Study, 2000
    • Phi Beta Kappa Honor Society, 2000
    • ACS Analytical Chemistry Award, 1999
    • CRC Freshman Chemistry Award, 1997

    Publications

    Refereed

    Gautier, T., J. Serigano, J. Bourgalais, S. M. Hörst, and M. G. Trainer. 2020. "Decomposition of electron ionization mass spectra for space application using a Monte‐Carlo approach." Rapid Communications in Mass Spectrometry, 34 (8): [10.1002/rcm.8684]

    Trainer, M. G., M. H. Wong, T. H. McConnochie, et al. H. B. Franz, S. K. Atreya, P. G. Conrad, F. Lefèvre, P. R. Mahaffy, C. A. Malespin, H. L. Manning, J. Martín‐Torres, G. M. Martínez, C. P. McKay, R. Navarro‐González, Á. Vicente‐Retortillo, C. R. Webster, and M. Zorzano. 2019. "Seasonal Variations in Atmospheric Composition as Measured in Gale Crater, Mars." Journal of Geophysical Research: Planets, 124 (11): 3000-3024 [10.1029/2019je006175]

    Lorenz, R. D., H. Imanaka, C. P. McKay, et al. D. B. Makel, G. W. Hunter, M. G. Trainer, R. Osiander, A. Mastandrea, J. W. Barnes, and E. P. Turtle. 2019. "Hydrogen sensing in Titan's atmosphere: Motivations and techniques." Planetary and Space Science, 174: 1-7 [10.1016/j.pss.2019.05.010]

    Navarro Gonzalez, R., K. Navarro, P. Coll, et al. C. McKay, J. C. Stern, B. Sutter, P. D. Archer, A. Buch, M. Cabane, P. G. Conrad, J. L. Eigenbrode, H. B. Franz, C. Freissinet, D. P. Glavin, J. Hogancamp, A. C. Mcadam, C. A. Malespin, J. Martín-Torres, D. Ming, R. Morris, B. D. Prats, F. Raulin, J. Rodríguez-Manfredi, C. Szopa, M.-P. Zorzano-Mier, P. Mahaffy, S. Atreya, M. G. Trainer, and A. Vasavada. 2018. "Abiotic input of fixed nitrogen by bolide impacts to Gale crater during the Hesperian. Insights from the Mars Science Laboratory." Journal of Geophysical Research-Planets, [Full Text (Link)] [10.1029/2018JE005852]

    Mathé, C., T. Gautier, M. G. Trainer, and N. Carrasco. 2018. "Detection Opportunity for Aromatic Signature in Titan’s Aerosols in the 4.1–5.3 μm Range." The Astrophysical Journal, 861 (2): L25 [10.3847/2041-8213/aacf88]

    Webster, C. R., P. Mahaffy, S. K. Atreya, et al. J. E. Moores, G. J. Flesch, C. Malespin, C. P. McKay, G. Martinez, C. L. Smith, J. Martin-Torres, J. Gomez-Elvira, M.-P. Zorzano, M. H. Wong, M. G. Trainer, A. Steele, D. Archer, B. Sutter, P. J. Coll, C. Freissinet, P.-Y. Meslin, R. V. Gough, C. H. House, A. A. Pavlov, J. L. Eigenbrode, D. P. Glavin, J. C. Pearson, D. Keymeulen, L. E. Christensen, S. P. Schwenzer, R. Navarro-Gonzalez, J. Pla-García, S. C. Rafkin, Á. Vicente-Retortillo, H. Kahanpää, D. Viudez-Moreiras, M. D. Smith, A.-M. Harri, M. Genzer, D. M. Hassler, M. Lemmon, J. Crisp, S. P. Sander, R. W. Zurek, and A. R. Vasavada. 2018. "Background levels of methane in Mars’ atmosphere show strong seasonal variations." Science, 360 (6393): 1093-1096 [10.1126/science.aaq0131]

    Neish, C. D., R. D. Lorenz, E. P. Turtle, et al. J. W. Barnes, M. G. Trainer, B. Stiles, R. Kirk, C. A. Hibbitts, and M. J. Malaska. 2018. "Strategies for Detecting Biological Molecules on Titan." Astrobiology, 18 (5): 571-585 [10.1089/ast.2017.1758]

    Gautier, T., J. A. Sebree, X. Li, et al. V. T. Pinnick, A. Grubisic, M. J. Loeffler, S. A. Getty, M. G. Trainer, and W. B. Brinckerhoff. 2017. "Influence of trace aromatics on the chemical growth mechanisms of Titan aerosol analogues." Planetary and Space Science, 140: 27-34 [10.1016/j.pss.2017.03.012]

    Franz, H. B., M. G. Trainer, C. A. Malespin, et al. P. R. Mahaffy, S. K. Atreya, R. H. Becker, M. Benna, P. G. Conrad, J. L. Eigenbrode, C. Freissinet, H. L. Manning, B. D. Prats, E. Raaen, and M. H. Wong. 2017. "Initial SAM Calibration Gas Experiments on Mars: Quadrupole Mass Spectrometer Results and Implications." Planetary and Space Science, [10.1016/j.pss.2017.01.014]

    Gautier, T., M. G. Trainer, M. J. Loeffler, J. A. Sebree, and C. M. Anderson. 2017. "Environmental temperature effect on the far-infrared absorption features of aromatic-based Titan's aerosol analogs." Icarus, 281: 338-341 [10.1016/j.icarus.2016.07.015]

    Arney, G., S. D. Domagal-Goldman, V. S. Meadows, et al. E. T. Wolf, E. Schwieterman, B. Charnay, M. Claire, E. Hébrard, and M. G. Trainer. 2016. "The Pale Orange Dot: The Spectrum and Habitability of Hazy Archean Earth." Astrobiology, 16 (11): 873-899 [10.1089/ast.2015.1422]

    Conrad, P., C. Malespin, H. Franz, et al. R. Pepin, M. Trainer, S. Schwenzer, S. Atreya, C. Freissinet, J. Jones, H. Manning, T. Owen, A. Pavlov, R. Wiens, M. Wong, and P. Mahaffy. 2016. "In situ measurement of atmospheric krypton and xenon on Mars with Mars Science Laboratory." Earth and Planetary Science Letters, 454: 1-9 [10.1016/j.epsl.2016.08.028]

    Sebree, J. A., J. C. Stern, K. A. Mandt, S. D. Domagal-Goldman, and M. G. Trainer. 2016. "13C and 15N fractionation of CH4/N2 mixtures during photochemical aerosol formation: Relevance to Titan." Icarus, 270: 421-428 [doi:10.1016/j.icarus.2015.04.016]

    Freissinet, C., S. Getty, M. G. Trainer, et al. D. P. Glavin, H. L. Mclain, and M. Benna. 2016. "Evaluation of the robustness of chromatographic columns in a simulated highly radiative Jovian environment." Planetary and Space Science, 122: 38-45 [10.1016/j.pss.2016.01.004]

    Mahaffy, P. R., C. R. Webster, J. C. Stern, et al. A. E. Brunner, S. K. Atreya, P. G. Conrad, S. Domagal-Goldman, J. L. Eigenbrode, G. J. Flesch, L. E. Christensen, H. B. Franz, C. Freissinet, D. P. Glavin, J. P. Grotzinger, J. H. Jones, L. A. Leshin, C. Malespin, A. C. McAdam, D. W. Ming, R. Navarro-Gonzalez, P. B. Niles, T. Owen, A. A. Pavlov, A. Steele, M. G. Trainer, K. H. Williford, and J. J. Wray. 2015. "The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars." Science, Vol 347: 412-414 [[DOI:10.1126/science.1260291]]

    Franz, H. B., M. G. Trainer, M. H. Wong, et al. P. R. Mahaffy, S. K. Atreya, H. L. Manning, and J. C. Stern. 2015. "Reevaluated martian atmospheric mixing ratios from the mass spectrometer on the Curiosity rover." Planetary and Space Science, 109-110: 154-158 [doi:10.1016/j.pss.2015.02.014]

    Sebree, J. A., M. G. Trainer, M. J. Loeffler, and C. M. Anderson. 2014. "Titan aerosol analog absorption features produced from aromatics in the far infrared." Icarus, 236: 146-152 [10.1016/j.icarus.2014.03.039]

    Franz, H. B., M. G. Trainer, M. H. Wong, et al. H. Manning, J. C. Stern, P. R. Mahaffy, S. K. Atreya, M. Bennaa, P. G. Conrad, D. N. Harpold, L. A. Leshin, C. A. Malespin, C. P. McKay, J. T. Nolan, and E. Raaen. 2014. "Analytical Techniques for Retrieval of Atmospheric Composition with the Quadrupole Mass Spectrometer of the Sample Analysis at Mars Instrument Suite on Mars Science Laboratory." Planet. Space Sci., [10.1016/j.pss.2014.03.005]

    Ming, D. W., P. D. Archer Jr, D. P. Glavin, et al. J. L. Eigenbrode, H. B. Franz, B. Sutter, A. E. Brunner, J. C. Stern, C. Freissinet, A. C. Mcadam, P. R. Mahaffy, M. Cabane, P. Coll, J. L. Campbell, S. K. Atreya, P. B. Niles, J. F. Bell III, D. L. Bish, W. B. Brinckerhoff, A. Buch, P. G. Conrad, D. J. Des Marais, B. L. Ehlmann, A. G. Fairen, K. Farley, G. J. Flesch, P. Francois, R. Gellert, J. A. Grant, J. P. Grotzinger, S. Gupta, K. E. Herkenhoff, J. A. Hurowitz, L. A. Leshin, K. W. Lewis, S. M. McLennan, K. E. Miller, J. Moersch, R. V. Morris, R. Navarro-Gonzalez, A. A. Pavlov, G. M. Perrett, I. Pradler, S. W. Squyres, R. E. Summons, A. Steele, E. M. Stolper, D. Y. Sumner, C. Szopa, S. Teinturier, M. G. Trainer, A. H. Treiman, D. T. Vaniman, A. R. Vasavada, C. R. Webster, J. J. Wray, and R. A. Yingst. 2014. "Volatile and Organic Compositions of Sedimentary Rocks in Yellowknife Bay, Gale Crater, Mars." Science, 343: 6169 [doi:10.1126/science.1245267]

    Wong, M. H., S. K. Atreya, P. N. Mahaffy, et al. H. B. Franz, C. Malespin, M. G. Trainer, J. C. Stern, P. G. Conrad, H. Manning, R. O. Pepin, R. H. Becker, C. P. McKay, T. C. Owen, R. Navarro-Gonzaalez, J. H. Jones, B. M. Jakosky, and A. Steele. 2013. "Isotopes of Nitrogen on Mars: Atmospheric Measurements by Curiosity's Mass Spectrometer." Geophys. Res. Lett., 40: 6033-6037 [10.1002/2013GL057840]

    Mahaffy, P. R., C. R. Webster, S. K. Atreya, et al. H. Franz, M. Wong, P. G. Conrad, D. Harpold, J. J. Jones, L. A. Leshin, H. Manning, T. Owen, R. O. Pepin, S. Squyres, and M. Trainer. 2013. "Abundance and Isotopic Composition of Gases in the Martian Atmosphere from the Curiosity Rover." Science, 341 (6143): 263-266 [10.1126/science.1237966]

    Leshin, L. A., P. R. Mahaffy, C. R. Webster, et al. M. Cabane, P. Coll, P. G. Conrad, P. D. Archer Jr, S. K. Atreya, A. E. Brunner, A. Buch, J. L. Eigenbrode, G. J. Flesch, H. B. Franz, C. Freissinet, D. P. Glavin, A. C. McAdam, K. E. Miller, D. W. Ming, R. V. Morris, R. Navarro-Gonzalez, P. B. Niles, T. Owen, R. O. Pepin, S. Squyres, A. Steele, J. C. Stern, R. E. Summons, D. Y. Sumner, B. Sutter, C. Szopa, S. Teinturier, M. G. Trainer, J. J. Wray, and J. P. Grotzinger. 2013. "Volatile, Isotope, and Organic Analysis of Martian Fines with the Mars Curiosity Rover." Science, 341: 6153 [10.1126/science.1238937]

    Atreya, S. K., M. G. Trainer, H. B. Franz, et al. M. H. Wong, H. Manning, C. A. Malespin, P. R. Mahaffy, P. G. Conrad, A. E. Brunner, L. A. Leshin, J. H. Jones, C. R. Webster, T. C. Owen, R. O. Pepin, and R. Navarro-Gonzalez. 2013. "Primordial Argon Isotope Fractionation in the Atmosphere of Mars Measured by the SAM Instrument on Curiosity and Implications for Atmospheric Loss." Geophys. Res. Lett., 40: 5605-5609.

    Trainer, M. G. 2013. "Atmospheric Prebiotic Chemistry and Organic Hazes." Current Organic Chemistry, 17: 1710- 1723.

    Trainer, M. G., J. A. Sebree, Y. H. Yoon, and M. A. Tolbert. 2013. "The Influence of Benzene as a Trace Reactant in Titan Aerosol Analogs." ApJ Letters, 766: L4 [Full Text (Link)] [doi:10.1088/2041-8205/766/1/L4]

    Trainer, M. G., J. L. Jimenez, Y. L. Yung, O. B. Toon, and M. A. Tolbert. 2012. "Nitrogen Incorporation in CH4-N2 Photochemical Aerosol Produced by Far UV Irradiation." Astrobiology, 12: 315 - 326.

    DeWitt, H. L., C. A. Hasenkopf, M. G. Trainer, et al. D. K. Farmer, J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2010. "The formation of sulfate and elemental sulfur aerosols under varying laboratory conditions: Implications for Early Earth." 773 - 781,

    Trainer, M. G., M. A. Tolbert, C. P. McKay, and O. B. Toon. 2010. "Enhanced CO2 Trapping in Water Ice via Atmospheric Deposition with Relevance to Mars." Icarus, 206: 707 - 715.

    Hasenkopf, C. A., M. R. Beaver, M. G. Trainer, et al. H. L. DeWitt, M. A. Freedman, O. B. Toon, C. P. McKay, and M. A. Tolbert. 2010. "Optical properties of Titan and early Earth haze laboratory analogs in the mid-visible." Icarus, 207: 903 - 913.

    Trainer, M. G., M. A. Tolbert, C. P. McKay, and O. B. Toon. 2010. "Limits on the Trapping of Atmospheric CH4 in Martian Polar Ice Analogs." Icarus, 208: 192 - 197.

    DeWitt, H. D., M. G. Trainer, A. A. Pavlov, et al. C. A. Hasenkopf, A. C. Aiken, J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2009. "Reduction in Haze Formation Rate on Prebiotic Earth in the Presence of Hydrogen." Astrobiology, 9: 447 - 453.

    Trainer, M. G., O. B. Toon, and M. A. Tolbert. 2009. "Measurement of Depositional Ice Nucleation on Insoluble Substrates at Low Temperatures: Implications for Earth and Mars." Journal of Physical Chemistry C, 113: 2036 - 2040.

    Trainer, M. G., A. A. Pavlov, H. L. DeWitt, et al. J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2006. "Organic Haze on Titan and the Early Earth." Proceedings of the National Academy of the Sciences, 103: 18035 - 18042.

    Trainer, M. G., A. A. Pavlov, J. L. Jimenez, et al. C. P. McKay, D. R. Worsnop, O. B. Toon, and M. A. Tolbert. 2004. "Chemical Composition of Titan's Haze: Are PAH's present?" Geophysical Research Letters, 31: L17S08 [ doi:10.1029/2004GL019859]

    Trainer, M. G., A. A. Pavlov, D. B. Curtis, et al. C. P. McKay, D. R. Worsnop, A. E. Delia, D. W. Toohey, O. B. Toon, and M. A. Tolbert. 2004. "Haze Aerosols in the Atmosphere of Early Earth: Manna from Heaven." Astrobiology, 4: 409 - 419.

    Talks, Presentations and Posters

    Invited

    Titan: An Exotic Ocean World Waiting to be Explored

    Library of Congress Video Link:  https://www.loc.gov/item/webcast-8648/

     

    10 / 11 / 2019

    Overview of Saturn's moon Titan and it's interest as an astrobiological target. A brief overview of the Dragonfly mission to Titan. 

    Brief Bio

    Dr. Melissa Trainer is a Deputy Principal Investigator (PI) for the Dragonfly mission to Saturn's moon Titan, part of the NASA Planetary Science New Frontiers Program.  Dr. Trainer is also the lead for the Dragonfly Mass Spectrometer (DraMS), an instrument supporting the Dragonfly investigation  of Titan's surface composition and characterization of potential prebiotic chemistry.

    Dr. Trainer has been at NASA Goddard Space Flight Center since 2009 as a Research Space Scientist in the Planetary Environments Laboratory. Her research interests include the composition of planetary atmospheres and the production of organic molecules and aerosols via atmospheric synthesis.

    Dr. Trainer has spent more than a decade characterizing the properties of Titan and early Earth aerosol analogs. Her publications on this topic include chemical, optical, and isotopic characterizations of these analogs produced via electric discharge and photochemical irradiation, with recent emphasis on the elemental composition, nitrogen activation, and the influence of trace species such as benzene.

    Dr. Trainer is a science team member on the Sample Analysis at Mars (SAM) experiment aboard the Mars Science Laboratory Mission’s Curiosity Rover, with a focus on the compositional measurements of the Mars atmosphere. She has led the campaign to conduct the first in situ multi-year study of the seasonal variations of the composition of the Mars atmosphere through surface mass spectrometry measurements. She also worked with the SAM team to make the first measurements of the full suite of xenon isotopes in the Mars atmosphere as well as the inventory of other noble gases.

    Dr. Trainer was a Co-Investigator and Deputy Instrument Scientist for the cryogenic sampling inlet and Neutral Mass Spectrometer on the proposed Titan Mare Explorer (TiME) Mission, which completed Phase A study in 2012. She was a Co-Investigator on the Discovery Candidate Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging (DAVINCI) mission, which completed Phase A study in 2016.

    Throughout her career, Dr. Trainer has been active in the NASA Astrobiology community and she participates in several education and public outreach programs. Dr. Trainer has mentored several summer undergraduate students and NASA Postdoctoral Fellows. She currently serves as the Associate Lab Chief of the Planetary Environments Lab.

     

    Publications

    Refereed

    Gautier, T., J. Serigano, J. Bourgalais, S. M. Hörst, and M. G. Trainer. 2020. "Decomposition of electron ionization mass spectra for space application using a Monte‐Carlo approach." Rapid Communications in Mass Spectrometry 34 (8): [10.1002/rcm.8684]

    Trainer, M. G., M. H. Wong, T. H. McConnochie, et al. H. B. Franz, S. K. Atreya, P. G. Conrad, F. Lefèvre, P. R. Mahaffy, C. A. Malespin, H. L. Manning, J. Martín‐Torres, G. M. Martínez, C. P. McKay, R. Navarro‐González, Á. Vicente‐Retortillo, C. R. Webster, and M. Zorzano. 2019. "Seasonal Variations in Atmospheric Composition as Measured in Gale Crater, Mars." Journal of Geophysical Research: Planets 124 (11): 3000-3024 [10.1029/2019je006175]

    Lorenz, R. D., H. Imanaka, C. P. McKay, et al. D. B. Makel, G. W. Hunter, M. G. Trainer, R. Osiander, A. Mastandrea, J. W. Barnes, and E. P. Turtle. 2019. "Hydrogen sensing in Titan's atmosphere: Motivations and techniques." Planetary and Space Science 174 1-7 [10.1016/j.pss.2019.05.010]

    Navarro Gonzalez, R., K. Navarro, P. Coll, et al. C. McKay, J. C. Stern, B. Sutter, P. D. Archer, A. Buch, M. Cabane, P. G. Conrad, J. L. Eigenbrode, H. B. Franz, C. Freissinet, D. P. Glavin, J. Hogancamp, A. C. Mcadam, C. A. Malespin, J. Martín-Torres, D. Ming, R. Morris, B. D. Prats, F. Raulin, J. Rodríguez-Manfredi, C. Szopa, M.-P. Zorzano-Mier, P. Mahaffy, S. Atreya, M. G. Trainer, and A. Vasavada. 2018. "Abiotic input of fixed nitrogen by bolide impacts to Gale crater during the Hesperian. Insights from the Mars Science Laboratory." Journal of Geophysical Research-Planets [Full Text (Link)] [10.1029/2018JE005852]

    Mathé, C., T. Gautier, M. G. Trainer, and N. Carrasco. 2018. "Detection Opportunity for Aromatic Signature in Titan’s Aerosols in the 4.1–5.3 μm Range." The Astrophysical Journal 861 (2): L25 [10.3847/2041-8213/aacf88]

    Webster, C. R., P. Mahaffy, S. K. Atreya, et al. J. E. Moores, G. J. Flesch, C. Malespin, C. P. McKay, G. Martinez, C. L. Smith, J. Martin-Torres, J. Gomez-Elvira, M.-P. Zorzano, M. H. Wong, M. G. Trainer, A. Steele, D. Archer, B. Sutter, P. J. Coll, C. Freissinet, P.-Y. Meslin, R. V. Gough, C. H. House, A. A. Pavlov, J. L. Eigenbrode, D. P. Glavin, J. C. Pearson, D. Keymeulen, L. E. Christensen, S. P. Schwenzer, R. Navarro-Gonzalez, J. Pla-García, S. C. Rafkin, Á. Vicente-Retortillo, H. Kahanpää, D. Viudez-Moreiras, M. D. Smith, A.-M. Harri, M. Genzer, D. M. Hassler, M. Lemmon, J. Crisp, S. P. Sander, R. W. Zurek, and A. R. Vasavada. 2018. "Background levels of methane in Mars’ atmosphere show strong seasonal variations." Science 360 (6393): 1093-1096 [10.1126/science.aaq0131]

    Neish, C. D., R. D. Lorenz, E. P. Turtle, et al. J. W. Barnes, M. G. Trainer, B. Stiles, R. Kirk, C. A. Hibbitts, and M. J. Malaska. 2018. "Strategies for Detecting Biological Molecules on Titan." Astrobiology 18 (5): 571-585 [10.1089/ast.2017.1758]

    Gautier, T., J. A. Sebree, X. Li, et al. V. T. Pinnick, A. Grubisic, M. J. Loeffler, S. A. Getty, M. G. Trainer, and W. B. Brinckerhoff. 2017. "Influence of trace aromatics on the chemical growth mechanisms of Titan aerosol analogues." Planetary and Space Science 140 27-34 [10.1016/j.pss.2017.03.012]

    Franz, H. B., M. G. Trainer, C. A. Malespin, et al. P. R. Mahaffy, S. K. Atreya, R. H. Becker, M. Benna, P. G. Conrad, J. L. Eigenbrode, C. Freissinet, H. L. Manning, B. D. Prats, E. Raaen, and M. H. Wong. 2017. "Initial SAM Calibration Gas Experiments on Mars: Quadrupole Mass Spectrometer Results and Implications." Planetary and Space Science [10.1016/j.pss.2017.01.014]

    Gautier, T., M. G. Trainer, M. J. Loeffler, J. A. Sebree, and C. M. Anderson. 2017. "Environmental temperature effect on the far-infrared absorption features of aromatic-based Titan's aerosol analogs." Icarus 281 338-341 [10.1016/j.icarus.2016.07.015]

    Arney, G., S. D. Domagal-Goldman, V. S. Meadows, et al. E. T. Wolf, E. Schwieterman, B. Charnay, M. Claire, E. Hébrard, and M. G. Trainer. 2016. "The Pale Orange Dot: The Spectrum and Habitability of Hazy Archean Earth." Astrobiology 16 (11): 873-899 [10.1089/ast.2015.1422]

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    Franz, H. B., M. G. Trainer, M. H. Wong, et al. P. R. Mahaffy, S. K. Atreya, H. L. Manning, and J. C. Stern. 2015. "Reevaluated martian atmospheric mixing ratios from the mass spectrometer on the Curiosity rover." Planetary and Space Science 109-110 154-158 [doi:10.1016/j.pss.2015.02.014]

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    Atreya, S. K., M. G. Trainer, H. B. Franz, et al. M. H. Wong, H. Manning, C. A. Malespin, P. R. Mahaffy, P. G. Conrad, A. E. Brunner, L. A. Leshin, J. H. Jones, C. R. Webster, T. C. Owen, R. O. Pepin, and R. Navarro-Gonzalez. 2013. "Primordial Argon Isotope Fractionation in the Atmosphere of Mars Measured by the SAM Instrument on Curiosity and Implications for Atmospheric Loss." Geophys. Res. Lett. 40 5605-5609.

    Trainer, M. G. 2013. "Atmospheric Prebiotic Chemistry and Organic Hazes." Current Organic Chemistry 17 1710- 1723.

    Trainer, M. G., J. A. Sebree, Y. H. Yoon, and M. A. Tolbert. 2013. "The Influence of Benzene as a Trace Reactant in Titan Aerosol Analogs." ApJ Letters 766 L4 [Full Text (Link)] [doi:10.1088/2041-8205/766/1/L4]

    Trainer, M. G., J. L. Jimenez, Y. L. Yung, O. B. Toon, and M. A. Tolbert. 2012. "Nitrogen Incorporation in CH4-N2 Photochemical Aerosol Produced by Far UV Irradiation." Astrobiology 12 315 - 326

    DeWitt, H. L., C. A. Hasenkopf, M. G. Trainer, et al. D. K. Farmer, J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2010. "The formation of sulfate and elemental sulfur aerosols under varying laboratory conditions: Implications for Early Earth." 773 - 781

    Trainer, M. G., M. A. Tolbert, C. P. McKay, and O. B. Toon. 2010. "Enhanced CO2 Trapping in Water Ice via Atmospheric Deposition with Relevance to Mars." Icarus 206 707 - 715

    Hasenkopf, C. A., M. R. Beaver, M. G. Trainer, et al. H. L. DeWitt, M. A. Freedman, O. B. Toon, C. P. McKay, and M. A. Tolbert. 2010. "Optical properties of Titan and early Earth haze laboratory analogs in the mid-visible." Icarus 207 903 - 913

    Trainer, M. G., M. A. Tolbert, C. P. McKay, and O. B. Toon. 2010. "Limits on the Trapping of Atmospheric CH4 in Martian Polar Ice Analogs." Icarus 208 192 - 197

    DeWitt, H. D., M. G. Trainer, A. A. Pavlov, et al. C. A. Hasenkopf, A. C. Aiken, J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2009. "Reduction in Haze Formation Rate on Prebiotic Earth in the Presence of Hydrogen." Astrobiology 9 447 - 453

    Trainer, M. G., O. B. Toon, and M. A. Tolbert. 2009. "Measurement of Depositional Ice Nucleation on Insoluble Substrates at Low Temperatures: Implications for Earth and Mars." Journal of Physical Chemistry C 113 2036 - 2040

    Trainer, M. G., A. A. Pavlov, H. L. DeWitt, et al. J. L. Jimenez, C. P. McKay, O. B. Toon, and M. A. Tolbert. 2006. "Organic Haze on Titan and the Early Earth." Proceedings of the National Academy of the Sciences 103 18035 - 18042

    Trainer, M. G., A. A. Pavlov, J. L. Jimenez, et al. C. P. McKay, D. R. Worsnop, O. B. Toon, and M. A. Tolbert. 2004. "Chemical Composition of Titan's Haze: Are PAH's present?" Geophysical Research Letters 31 L17S08 [ doi:10.1029/2004GL019859]

    Trainer, M. G., A. A. Pavlov, D. B. Curtis, et al. C. P. McKay, D. R. Worsnop, A. E. Delia, D. W. Toohey, O. B. Toon, and M. A. Tolbert. 2004. "Haze Aerosols in the Atmosphere of Early Earth: Manna from Heaven." Astrobiology 4 409 - 419

                                                                                                                                                                                            
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