Scott T Wieman

Scott T Wieman

  • Lab Manager
  • 301.286.0828
  • NASA/GSFC
  • Mail Code: 690
  • Greenbelt , MD 20771
  • Employer: UNIVERSITY OF MARYLAND BALTIMORE CO
  • Brief Bio

    Scott Wieman is a stable isotope expert who is a geochemist on the Curiosity Rover science team; a research faculty member at University of Maryland, Baltimore County; and the manager of the Stable Isotope Facilities at NASA’s Goddard Space Flight Center’s planetary environments group. He graduated from Williams College with a bachelor’s degree in chemistry and earned his master’s degree in Earth and Planetary Science at Harvard University. Ever the explorer, Scott has long been an avid outdoorsman and his research experience spans geologic time and astronomic distances. He has pursued research on long-term acid rain recovery in New England, Cenozoic applications of the carbonate clumped isotope paleothermometer, preservation of stable isotope biosignatures in Paleozoic stromatolites, the possibility of reduced nitrogen in the upper Martian subsurface, and the evolution of carbon isotopes in Titan’s atmosphere.

    Education

    University of Maryland Francis King Carey School of Law2018-2020

    Master of Science in Law in Environmental Law, May 2020

    Harvard University, 2015-2017

    Master of Arts in Earth and Planetary Science, May 2017

    Williams College2010-2014

    Bachelor of Arts in Chemistry, June 2014

    Positions/Employment

    8/2017 - Present

    Stable Isotope Facilities Manager

    NASA Goddard Space Flight Center, Greenbelt, MD

    Manage the ThermoFinnegan Delta V isotope ratio mass spectrometer (IRMS) and various front ends in the Planetary Environments Laboratory at NASA's Goddard Space Flight Center. Conduct research in collabotation with Dr. Jennifer Stern and other NASA and external collaborators. Measure bulk δ13C, δ15N, and δD to study laboratory analogs of Martian clays and field analogs from around the world. Carry out compound-specific δ13C measurements on gaseous samples to elucidate the role aerosol formation plays in the carbon isotopic fractionation of Titan's atmosphere. Also study inorganic, organic, and bulk δ13C, δ15N, and δ18O for projects on Earth, including understanding formation environments and biosignature preservation of geologic samples. Working with an underwater membrane mass spectrometer to measure δ13C and δ18O of CO2 in situ in the Gulf of Mexico.

    7/2018 - Present

    MSL Science Team Member

    National Aeronautics and Space Administration, Greenbelt, MD

    Research associate with Drs. Jennifer Stern and Paul Mahaffey on the Mars Science Laboratory (MSL) science team. Isotope geochemist for the Sample Analysis at Mars (SAM) instrument suite aboard the Curiosity Rover at Gale Crater, Mars. Studying δ15N in Martian surface samples to elucidate past nitrogen cycling processes and developing a correction function for nitrogen isotopes on the SAM testbed at NASA's Goddard Space Flight Center. Also studying δ13C and δ18O in Martian surface samples and terrestrial analogs.

    8/2017 - Present

    Assistant Research Faculty

    University of Maryland, Baltimore County Physics Department, Baltimore, MD

    Faculty member in the Center for Space Sciences and Technology, a research center in the physics department at the Univerisy of Maryland, Baltimore County as part of the CRESST II consortium

    7/2015 - 1/2017

    Graduate Research Assistant

    Harvard University Department of Earth and Planetary Science, Cambridge, MA

    Studied carbonate clumped isotope paleothermometry in the Laboratory for Geochemical Oceanography. Probed lower limit of mass detection using correia marble standards to investigate efficacy of a novel measurement technique on a dual-inlet Thermo 253 IRMS. Collaborated with postdoctoral fellow Greg Henkes (Pearson group) on clumped isotope measurements of carbonate accretionary lapilli from the Chicxulub impact cloud to examine upper temperature limites of the paleothermometer and the formation environment of the particulates.

    6/2014 - 6/2015

    Associate Researcher

    Williams College Geosciences Department and Center for Environmental Studies, Williamstown, MA

    Collaborated with Dr. David Dethier and Jay Racela to study aqueous chemical fluxes in Birch Brook and Ford Glen in Williamstown, MA and their implications for understanding acid rain buffering mechanisms in streams by soil and bedrock. Investigated seasonal and long-term trends in concentrations and fluxes of anthropogenic and weathering-related ions over the past thirty years.

    6/2013 - 8/2013

    Undergraduate Research Assistant

    Williams College Chemistry Department and Center for Environmental Studies, Williamstown, MA

    Worked with Dr. David Richardson and Jay Racela to begin an interdisciplinary project developing rapid extraction methods for total soil-bound phosphorus, a major factor in plant growth. Developed methodology for ion chromatography and atomic absorption spectrometry to detect low concentrations of phosphorus in aqueous samples.

    6/2012 - 8/2012

    Undergraduate Research Assistant

    Williams College Chemistry Department, Williamstown, MA

    Worked with Drs. John Thoman and David Richardson to use cavity ringdown spectroscopy to study the fifth and sixth C-F stretching overtones in deuterated hydrofluorocarbons, important atmospheric pollutants. Also performed density functional theory computations to model their conformational geometries and related energy.

    Teaching Experience

    Harvard University

    1. SPU 25: Energy and Climate: Vision for the Future (Teaching Fellow), S 2017
    2. PHYSCI 11: Foundations and Frontiers of Modern Chemistry (Teaching Fellow), S 2017
    3. SPU 29: The Climate-Energy Challenge (Teaching Fellow), F 2017

    Williams College

    1. GEOS 214: Geographic Information Systems and Remote Sensing (Teaching Assistant), S 2014
    2. CHEM 255: Intermediate Organic Chemistry Special Section (Teaching Assistant), F 2012
    3. Physical Education: Snowshoeing (Head Instructor), 2014
    4. Physical Education: Snowshoeing (Instructor), W 2012, W 2013

    Professional Service

    • Senior Editor, Journal of Emerging Investigators, 2019-present
    • Reviewer, Journal of Emerging Investigators, 2015-present
    • Roy J. Shlemon Mentor in Applied Geoscience, Geological Society of America, 2019
    • John Mann Mentor in Applied Hydrogeology, Geological Society of America, 2019
    • ClimaTea Organizer, Harvard University Center for the Environment, 2016
    • Associate Editor, Journal of Emerging Investigators, 2015-2019

    Grants

    10/01/2018 - 10/01/2020 Fundamental Laboratory Research (FLaRe), National Aeronautics and Space Administration Planetary Science Division

    Tracing Pathways of Stable Isotope Fractionation during Photochemical Aerosol Formation with Relevance to Titan

    ; Co-Investigator

    Awards

    • Make Our Planet Great Again Doctoral Fellowship, French Ministry of Europe and Foreign Affairs, declined2018
    • Certificate of Distinction in Teaching (PHYSCI 11), Derek Bok Center for Teaching and Learning, Harvard University, 2017
    • Certificate of Distinction in Teaching (SPU 25), Derek Bok Center for Teaching and Learning, Harvard University, 2017
    • Skaff Family Environmental Graduate Fellowship, Harvard University Center for the Environment, 2015
    • Fulbright U.S. Student Research Fellowship, J. William Fulbright Foreign Scholarship Board, declined2015
    • Graduate Research Grant, American-Scandinavian Foundation, declined2015
    • Robert Ikemori Quay '04 Outing Club Memorial Fellowship, Williams College Outing Club, 2014
    • Class of 1960's Scholar in Chemistry, Williams College Chemistry Department, 2013

    Publications

    Refereed

    Neveu, M., C. H. House, and S. T. Wieman. 2020. "Phoebe's carbon isotopic composition as evidence for self-shielding of 12CO in the solar nebula." Icarus, 345: [10.1016/j.icarus.2020.113714]

    Murphy, A. E., S. T. Wieman, J. Gross, et al. J. C. Stern, A. Steele, and M. Glamoclija. 2020. "Characterization of organic carbon in Cambrian stromatolites and implications for microbial biosignature preservation through secondary dolomitization." Chemical Geology, (Submitted)

    Dethier, D. P., S. T. Wieman, and J. Racela. 2018. "Thirty-year trends in acid deposition and neutralization in two headwater catchments, northwestern Massachusetts, USA." Hydrological Processes, 32 (23): 3464-3478 [10.1002/hyp.13270]

    Talks, Presentations and Posters

    Invited

    Wieman, S.T. Light stable isotope research in support of ongoing and future NASA flight missions. Geological Society of Washington, Washington, District of Columbia, oral presentation.

    9 / 2019

    Other

    Wieman, S.T., J.C. Stern, S. Toler, R.T. Short. In situ measurements of δ13C and δ18O of dissolved CO2 using an underwater mass spectrometer. Harsh Environments Mass Spectrometry Workshop, Myrtle Beach, South Carolina, poster presentation.

    9 / 2019

    Trainer, M.G., M. Roach, S.T. Wieman, M. Ugelow, J.C. Stern. Isotopic fractionation during methane photolysis with relevance to Titan. Titan After Cassini-Huygens Scientific Workshop, Madrid, Spain, oral presentation.

    9 / 2019

    Murphy, A., J. Gross, J. Stern, S.T. Wieman, M. Glamoclija. Biosignature Alteration in Dolomitized Cambrian Stromatolites and Implications for Interpreting Carbonate Diagenesis on Mars. Astrobiology Science Conference, Bellvue, Washington, oral presentation.

    6 / 2019

    Roach, M.C., M.S. Ugelow, M.G. Trainer, S.T. Wieman, J.C. Stern. Isotopic Fractionation During Methane Photolysis with Relevance to Titan and Early Earth. Astrobiology Science Conference, Bellvue, Washington, poster presentation.

    6 / 2019

    Wieman, S.T., S. Andrejkovicová, J.C. Stern. Using Isotopic Changes to Measure Modifications of Clays for Martian Habitability Studies. Advances in Stable Isotope Techniques and Applications Workshop, Winnipeg, Manitoba, oral presentation.

    6 / 2019

    Wieman, S.T., J. Racela, D.P. Dethier. Canopy-surface cycling of chloride in a northeastern hardwood forest. Geological Society of America Northeastern Section Meeting, Portland, Maine, oral presentation.

    3 / 2019

    Andrejkovicová, S., A.C. McAdam, J.C. Stern, C. Knudson, R. Navarro-González, M. Millan, S.T. Wieman, E.B. Rampe, D. Ming, P.R. Mahaffy. Are Ammonium-Smectites a Source of Nitrogen in SAM Analysis? American Geophysical Union Fall Meeting, Washington, District of Columbia, oral presentation.

    12 / 2018

    Sedlacek, A., R. Clark, R. McMorran, N. Bishop, S.T. Wieman, J.A. Sebree, B. Witzke. Application of carbon isotopic stratigraphy of the Middle to Upper Devonian (Givetian-Frasnian) Cedar Valley Group in the Iowa Basin - new data from a core in North-Central Iowa. Geological Society of America National Meeting, Indianapolis, Indiana, poster presentation.

    11 / 2018

    Dethier, D.P., J. Racela, S.T. Wieman. A contemporary mass-balance approach to small-catchment denudation rates in glaciated New England. Geological Society of America National Meeting, Indianapolis, Indiana, oral presentation.

    11 / 2018

    Wieman, S.T., M.S. Ugelow, M.G. Trainer, J.C. Stern, M.C. Roach, J.A. Sebree. Aerosol Formation as a Fractionation Pathway in Titan’s Atmosphere. Advances in Stable Isotope Techniques and Applications Workshop, Washington, District of Columbia, oral presentation.

    6 / 2018

    Ugelow, M.S., M.G. Trainer, S.T. Wieman, J.C. Stern, M.C. Roach, J.A. Sebree. Stable Isotope Fractionation in Titan Aerosol Formation. 49th Lunar and Planetary Science Conference, The Woodlands, Texas, poster presentation.

    3 / 2018

    McAdam, A.C., C.A. Knudson, S. Andrejkovicova, J.C. Stern, S.T. Wieman, A. Fox, J.L. Eigenbrode, I.L. Ten Kate, P.R. Mahaffy. Salt and Secondary Silicate Mineralogy in Antarctic Soil Profiles: Implications for Martian Soils. 49th Lunar and Planetary Science Conference, The Woodlands, Texas, poster presentation.

    3 / 2018

    Andrejkovicová, S., A.C. McAdam, J.C. Stern, C. Knudson, R. Navarro-González, M. Millan, S.T. Wieman, J.A. Sebree, N.M. Bishop, E.B. Rampe, P.R. Mahaffy. NH4-Smectite, A Potential Source of N Compounds (NO) in SAM Analyses. 49th Lunar and Planetary Science Conference, The Woodlands, Texas, oral presentation.

    3 / 2018

    Henkes, G.A., S.T. Wieman, T.E. Yancey, E.L. Grossman, B.H. Passey, D.P. Schrag. Clumped isotope thermometry of distal deposits from the end-Cretaceous Chicxulub impact event. Fifth International Clumped Isotope Workshop, Saint Petersburg, Florida, poster presentation.

    1 / 2016

    Wieman, S.T., J. Racela, D.P. Dethier. Thirty-year trends in acid deposition and mass balance in two headwater catchments, NW Massachusetts. Geological Society of America Northeastern Section Meeting, Bretton Woods, New Hampshire, oral presentation.

    3 / 2015

    Professional Societies

    Geological Society of America, 2014 - Present
    American Chemical Society, 2012 - 2014

    Brief Bio

    Scott Wieman is a stable isotope expert who is a geochemist on the Curiosity Rover science team; a research faculty member at University of Maryland, Baltimore County; and the manager of the Stable Isotope Facilities at NASA’s Goddard Space Flight Center’s planetary environments group. He graduated from Williams College with a bachelor’s degree in chemistry and earned his master’s degree in Earth and Planetary Science at Harvard University. Ever the explorer, Scott has long been an avid outdoorsman and his research experience spans geologic time and astronomic distances. He has pursued research on long-term acid rain recovery in New England, Cenozoic applications of the carbonate clumped isotope paleothermometer, preservation of stable isotope biosignatures in Paleozoic stromatolites, the possibility of reduced nitrogen in the upper Martian subsurface, and the evolution of carbon isotopes in Titan’s atmosphere.

    Publications

    Refereed

    Neveu, M., C. H. House, and S. T. Wieman. 2020. "Phoebe's carbon isotopic composition as evidence for self-shielding of 12CO in the solar nebula." Icarus 345 [10.1016/j.icarus.2020.113714]

    Murphy, A. E., S. T. Wieman, J. Gross, et al. J. C. Stern, A. Steele, and M. Glamoclija. 2020. "Characterization of organic carbon in Cambrian stromatolites and implications for microbial biosignature preservation through secondary dolomitization." Chemical Geology (Submitted)

    Dethier, D. P., S. T. Wieman, and J. Racela. 2018. "Thirty-year trends in acid deposition and neutralization in two headwater catchments, northwestern Massachusetts, USA." Hydrological Processes 32 (23): 3464-3478 [10.1002/hyp.13270]

                                                                                                                                                                                            
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