Bethany L. Ehlmann

Professor of Planetary Science; Jet Propulsion Laboratory Research Scientist
A.B., Washington University in St. Louis, 2004; M.Sc., University of Oxford, 2005; M.Sc., 2007; M.S., Brown University, 2008; Ph.D., 2010. Assistant Professor, Caltech, 2011-17; Professor, 2017-; Jet Propulsion Laboratory Research Scientist, 2011-.

Please see my research page for a description of my ongoing research projects. (

Research Interests

Remote compositional analysis of planetary surfaces; environmental change over Mars history; chemical and physical weathering processes on terrestrial planets; infrared spectroscopy and quantitative radiative transfer modeling; habitability, rock-microbe interactions, biomarker preservation; early Earth surface environments; environmental science and applications of remote sensing; science policy.


Selected Publications 

For a complete publications list, see

Stein, N. T., Ehlmann, B. L. et al. (2017) The formation and evolution of bright spots on Ceres. Icarus . ISSN 0019-1035.
Lapotre, M. G. A. and Ehlmann, B. L. and Minson, S. E. (2017) A Probabilistic Approach to Remote Compositional Analysis of Planetary Surfaces. Journal of Geophysical Research: Planets, 122 (5). pp. 983-1009. ISSN 2169-9100.
Bridges, Nathan T. and Ehlmann, Bethany L. (2017) The Mars Science Laboratory (MSL) Bagnold Dunes campaign, Phase I: Overview and introduction to the special issue. Journal of Geophysical Research. Planets, 123 (1). pp. 3-19. ISSN 2169-9097.
Ehlmann, B. L. and Edgett, K. S. and Sutter, B. et al. (2017) Chemistry, Mineralogy, and Grain Properties at Namib and High Dunes, Bagnold Dune Field, Gale Crater, Mars: A Synthesis of Curiosity Rover Observations. Journal of Geophysical Research. Planets, 122 (12). pp. 2510-2543. ISSN 2169-9097.
Hu, R, DM Kass, BL Ehlmann, Y Yung. Tracing the fate of carbonate and the atmospheric evolution of Mars, Nature Communications, doi: 10.1038/ncomms10003, 2015
Edwards, CS and BL Ehlmann. Carbon sequestration on Mars, Geology, doi:10.1130/G36983.1, 2015
Greenberger, R, JF Mustard, BL Ehlmann, DL Blaney, EA Cloutis, JH Wilson, RO Green, AA Fraeman, Imaging spectroscopy of geological samples and outcrops: novel insights from microns to meters, GSA Today, GSA Today, 25(12) doi: 10.1130/GSATG252A.1, 2015
Ehlmann, Bethany L. and Edwards, Christopher S. (2014) Mineralogy of the Martian Surface. Annual Review of Earth and Planetary Sciences, 42 . pp. 291-315. ISSN 0084-6597.
Hu, Renyu and Ehlmann, Bethany L. and Seager, Sara (2012) Theoretical Spectra of Terrestrial Exoplanet Surfaces. Astrophysical Journal, 752 (1). Art. No. 7. ISSN 0004-637X.
Ehlmann, Bethany L. et al. (2011) Subsurface water and clay mineral formation during the early history of Mars. Nature, 479 (7371). pp. 53-60. ISSN 0028-0836.
Ehlmann, B. L. and Mustard, J. F. and Murchie, S. L. (2010) Geologic setting of serpentine deposits on Mars. Geophysical Research Letters, 37 . Art. No. L06201. ISSN 0094-8276.
Ehlmann, Bethany L. et al. (2009) Identification of hydrated silicate minerals on Mars using MRO-CRISM: Geologic context near Nili Fossae and implications for aqueous alteration. Journal of Geophysical Research E, 114 . Art. No. E00D08. ISSN 0148-0227.
Ehlmann, Bethany L. et al. (2008) Orbital Identification of Carbonate-Bearing Rocks on Mars. Science, 322 (5909). pp. 1828-1832. ISSN 0036-8075.
Ehlmann , Bethany L. et al. (2008) Clay minerals in delta deposits and organic preservation potential on Mars. Nature Geoscience, 1 (6). pp. 355-358. ISSN 1752-0894.
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