Nathan Bridges Print



:   Planetary Geologist; Nathan passed away April 26, 2017. This profile is static for legacy purposes.

:  Planetary

  Mars 2020, SuperCam, MEDA, MRO, HiRISE, MSL, ChemCam

Degree Field of Study Year Attained Institution Name
Ph.D. Geology 1997 University of Massachusetts
MS Geology 1992 Arizona State University
BA Geology 1989 University of Colorado

I am a research scientist at the Johns Hopkins University Applied Physics Laboratory, where I have worked since 2009. Prior to that I was at the Jet Propulsion Laboratory (1997-2009). Currently I am also an Associate Research Professor in the Earth and Planetary Science Department at Johns Hopkins University. My primary research focus is planetary surface processes, in particular the mechanisms, rates, and dynamics of wind and associated particle transport on Mars, Earth, and Titan. In my work, I combine mission participation and data analysis, field investigations, experiments (mainly in wind tunnels), and modeling.  I'm a Co-Investigator on the HiRISE camera on the Mars Reconnaissance Orbiter, ChemCam on the Mars Science Laboratory/Curiosity rover, and the Mars Environmental Dynamics Analyzer (MEDA) on the Mars-2020 rover. I'm also a Collaborator on SuperCam on Mars-2020, and PI on NASA grants to study sand dune motion on Mars and Titan.

AGU Index Category AGU Index Sub-Category
PLANETARY SCIENCES: SOLID SURFACE PLANETS Surface materials and properties
Start Year End Year Description
2009 Current Staff Scientist, Johns Hopkins University Applied Physics Laboratory
1997 2009 Research Scientist, Jet Propulsion Laboratory
Year Description
2015 - Present AGU Planetary Section President-Elect
1997 - Present Geological Society of America member
1988 - Present American Geophysical Union member
2015 NASA Group Achievement Award, MSL Prime Mission Science and Operations Team
2015 - 2015 Mars Next Orbiter Science Advisory Group
2013 - 2014 AGU Planetary Section Secretary
2013 NASA Group Achievement Award, MSL ChemCam Instrument Develop. and Science Team
2011 - 2013 Eos Editorial Advisory Board (Planetary Section)
2011 NASA Group Achievement Award, MRO HiRISE Science Team
2006 NASA Group Achievement Award, MRO Project Development Team
2005 NASA Group Achievement Award, MER Science/Science Support Team
1992 Dwornik Best Student Paper Award at Lunar and Planetary Science Conference
The following publication information was downloaded from

ORCID logo

J. R. Zimbelman, S. P. Scheidt, S. L. de Silva, N. T. Bridges, M. G. Spagnuolo, E. M. Neely, (2016), Aerodynamic roughness height for gravel-mantled megaripples, with implications for wind profiles near TARs on Mars, Icarus, 266, 306-314

N. T. Bridges, M. G. Spagnuolo, S. L. de Silva, J. R. Zimbelman, E. M. Neely, (2015), Formation of gravel-mantled megaripples on Earth and Mars: Insights from the Argentinean Puna and wind tunnel experiments, Aeolian Research, 17, 49-60

Nathan T. Bridges, Leslie K. Tamppari, (2015), Dynamic Mars from long-term observations: Introduction, Icarus, 251, 1-4

Devon M. Burr, Nathan T. Bridges, John R. Marshall, James K. Smith, Bruce R. White, Joshua P. Emery, (2015), Higher-than-predicted saltation threshold wind speeds on Titan, Nature, 517, 60-U137

Devon M. Burr, Nathan T. Bridges, James K. Smith, John R. Marshall, Bruce R. White, David A. Williams, (2015), The Titan Wind Tunnel: A new tool for investigating extraterrestrial aeolian environments, Aeolian Research, 18, 205-214

S. Le Mouelic, O. Gasnault, K. E. Herkenhoff, N. T. Bridges, Y. Langevin, N. Mangold, S. Maurice, R. C. Wiens, P. Pinet, H. E. Newsom, R. G. Deen, J. F. Bell, J. R. Johnson, W. Rapin, B. Barraclough, D. L. Blaney, L. Deflores, J. Maki, M. C. Malin, R. Perez, M. Saccoccio, (2015), The ChemCam Remote Micro-Imager at Gale crater: Review of the first year of operations on Mars, Icarus, 249, 93-107

Horton E. Newsom, Nicolas Mangold, Linda C. Kah, Joshua M. Williams, Ray E. Arvidson, Nathan Stein, Ann M. Ollila, John C. Bridges, Susanne P. Schwenzer, Penelope L. King, John A. Grant, Patrick Pinet, Nathan T. Bridges, Fred Calef, Roger C. Wiens, John G. Spray, David T. Vaniman, Wolf E. Elston, Jeff A. Berger, James B. Garvin, Marisa C. Palucis, MSL Sci Team, (2015), Gale crater and impact processes - Curiosity's first 364 Sols on Mars, Icarus, 249, 108-128

F. Ayoub, J. -P. Avouac, C. E. Newman, M. I. Richardson, A. Lucas, S. Leprince, N. T. Bridges, (2014), Threshold for sand mobility on Mars calibrated from seasonal variations of sand flux, Nature Communications, 5

N. T. Bridges, F. J. Calef, B. Hallet, K. E. Herkenhoff, N. L. Lanza, S. Le Mouelic, C. E. Newman, D. L. Blaney, M. A. de Pablo, G. A. Kocurek, Y. Langevin, K. W. Lewis, N. Mangold, S. Maurice, P. -Y. Meslin, P. Pinet, N. O. Renno, M. S. Rice, M. E. Richardson, V. Sautter, R. S. Sletten, R. C. Wiens, R. A. Yingst, (2014), The rock abrasion record at Gale Crater: Mars Science Laboratory results from Bradbury Landing to Rocknest, Journal of Geophysical Research-Planets, 119, 1374-1389

Ralph D. Lorenz, Nathan T. Bridges, Alex A. Rosenthal, Elise Donkor, (2014), Elevation dependence of bedform wavelength on Tharsis Montes, Mars: Atmospheric density as a controlling parameter, Icarus, 230, 77-80

B. J. Thomson, J. A. Hurowitz, L. L. Baker, N. T. Bridges, A. M. Lennon, G. Paulsen, K. Zacny, (2014), The effects of weathering on the strength and chemistry of Columbia River Basalts and their implications for Mars Exploration Rover Rock Abrasion Tool (RAT) results, Earth and Planetary Science Letters, 400, 130-144

S. L. de Silva, M. G. Spagnuolo, N. T. Bridges, J. R. Zimbelman, (2013), Gravel-mantled megaripples of the Argentinean Puna: A model for their origin and growth with implications for Mars, Geological Society of America Bulletin, 125, 1912-1929

Paul E. Geissler, Nicholas W. Stantzos, Nathan T. Bridges, Mary C. Bourke, Simone Silvestro, Lori K. Fenton, (2013), Shifting sands on Mars: insights from tropical intra-crater dunes, Earth Surface Processes and Landforms, 38, 407-412

B. J. Thomson, N. T. Bridges, J. Cohen, J. A. Hurowitz, A. Lennon, G. Paulsen, K. Zacny, (2013), Estimating rock compressive strength from Rock Abrasion Tool (RAT) grinds, Journal of Geophysical Research-Planets, 118, 1233-1244

N. T. Bridges, F. Ayoub, J-P. Avouac, S. Leprince, A. Lucas, S. Mattson, (2012), Earth-like sand fluxes on Mars, Nature, 485, 339-342

Nathan T. Bridges, Mary C. Bourke, Paul E. Geissler, Maria E. Banks, Cindy Colon, Serina Diniega, Matthew P. Golombek, Candice J. Hansen, Sarah Mattson, Alfred S. McEwen, Michael T. Mellon, Nicholas Stantzos, Bradley J. Thomson, (2012), Planet-wide sand motion on Mars, Geology, 40, 31-34

Nathan T. Bridges, Daniel R. Muhs, JP Grotzinger, RE Milliken, (2012), DUSTSTONES ON MARS: SOURCE, TRANSPORT, DEPOSITION, AND EROSION, Sedimentary Geology of Mars, 102, 169-182

C. J. Hansen, M. Bourke, N. T. Bridges, S. Byrne, C. Colon, S. Diniega, C. Dundas, K. Herkenhoff, A. McEwen, M. Mellon, G. Portyankina, N. Thomas, (2011), Seasonal Erosion and Restoration of Mars' Northern Polar Dunes, Science, 331, 575-578

N. Thomas, R. Stelter, A. Ivanov, N. T. Bridges, K. E. Herkenhoff, A. S. McEwen, (2011), Spectral heterogeneity on Phobos and Deimos: HiRISE observations and comparisons to Mars Pathfinder results, Planetary and Space Science, 59, 1281-1292

B. J. Thomson, N. T. Bridges, R. Milliken, A. Baldridge, S. J. Hook, J. K. Crowley, G. M. Marion, C. R. de Souza Filho, A. J. Brown, C. M. Weitz, (2011), Constraints on the origin and evolution of the layered mound in Gale Crater, Mars using Mars Reconnaissance Orbiter data, Icarus, 214, 413-432

N. T. Bridges, M. E. Banks, R. A. Beyer, F. C. Chuang, E. Z. Noe Dobrea, K. E. Herkenhoff, L. P. Keszthelyi, K. E. Fishbaugh, A. S. McEwen, T. I. Michaels, B. J. Thomson, J. J. Wray, (2010), Aeolian bedforms, yardangs, and indurated surfaces in the Tharsis Montes as seen by the HiRISE Camera: Evidence for dust aggregates, Icarus, 205, 165-182

Nathan T. Bridges, Anshuman Razdan, Xuetao Yin, Ronald Greeley, Saif Ali, Rakesh Kushunapally, (2010), Quantification of shape and texture for wind abrasion studies: Proof of concept using analog targets, Geomorphology, 114, 213-226

Adrian J. Brown, Simon J. Hook, Alice M. Baldridge, James K. Crowley, Nathan T. Bridges, Bradley J. Thomson, Giles M. Marion, Carlos R. de Souza Filho, Janice L. Bishop, (2010), Hydrothermal formation of Clay-Carbonate alteration assemblages in the Nil Fossae region of Mars, Earth and Planetary Science Letters, 297, 174-182

Frank C. Chuang, Ross A. Beyer, Nathan T. Bridges, (2010), Modification of Martian slope streaks by eolian processes, Icarus, 205, 154-164

W. Alan Delamere, Livio L. Tornabene, Alfred S. McEwen, Kris Becker, James W. Bergstrom, Nathan T. Bridges, Eric M. Eliason, Dennis Gallagher, Kenneth E. Herkenhoff, Laszlo Keszthelyi, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Moses Milazzo, Patrick S. Russell, Nicolas Thomas, (2010), Color imaging of Mars by the High Resolution Imaging Science Experiment (HiRISE), Icarus, 205, 38-52

Serina Diniega, Shane Byrne, Nathan T. Bridges, Colin M. Dundas, Alfred S. McEwen, (2010), Seasonality of present-day Martian dune-gully activity, Geology, 38, 1047-1050

Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy McArthur, Michael T. Mellon, Joannah M. Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris H. Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steven W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray, (2010), The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP), Icarus, 205, 2-37

S. Silvestro, L. K. Fenton, D. A. Vaz, N. T. Bridges, G. G. Ori, (2010), Ripple migration and dune activity on Mars: Evidence for dynamic wind processes, Geophysical Research Letters, 37

A. M. Baldridge, S. J. Hook, J. K. Crowley, G. M. Marion, J. S. Kargel, J. L. Michalski, B. J. Thomson, C. R. de Souza Filho, N. T. Bridges, A. J. Brown, (2009), Contemporaneous deposition of phyllosilicates and sulfates: Using Australian acidic saline lake deposits to describe geochemical variability on Mars, Geophysical Research Letters, 36

Julie E. Laity, Nathan T. Bridges, (2009), Ventifacts on Earth and Mars: Analytical, field, and laboratory studies supporting sand abrasion and windward feature development, Geomorphology, 105, 202-217

G. M. Marion, J. K. Crowley, B. J. Thomson, J. S. Kargel, N. T. Bridges, S. J. Hook, A. Baldridge, A. J. Brown, B. Ribeiro da Luz, C. R. de Souza Filho, (2009), Modeling aluminum-silicon chemistries and application to Australian acidic playa lakes as analogues for Mars, Geochimica Et Cosmochimica Acta, 73, 3493-3511

Ronald Greeley, Patrick L. Whelley, Lynn D. V. Neakrase, Raymond E. Arvidson, Nathan T. Bridges, Nathalie A. Cabrol, Philip R. Christensen, Kaichang Di, Daniel J. Foley, Matthew P. Golombek, Kenneth Herkenhoff, Amy Knudson, Ruslan O. Kuzmin, Ron Li, Timothy Michaels, Steven W. Squyres, Robert Sullivan, Shane D. Thompson, (2008), Columbia Hills, Mars: Aeolian features seen from the ground and orbit, Journal of Geophysical Research-Planets, 113

B. J. Thomson, N. T. Bridges, R. Greeley, (2008), Rock abrasion features in the Columbia Hills, Mars, Journal of Geophysical Research-Planets, 113

N. T. Bridges, P. E. Geissler, A. S. McEwen, B. J. Thomson, F. C. Chuang, K. E. Herkenhoff, L. P. Keszthelyi, S. Martinez-Alonso, (2007), Windy Mars: A dynamic planet as seen by the HiRISE camera, Geophysical Research Letters, 34

Troy L. Hudson, Oded Aharonson, Norbert Schorghofer, Crofton B. Farmer, Michael H. Hecht, Nathan T. Bridges, (2007), Water vapor diffusion in Mars subsurface environments, Journal of Geophysical Research-Planets, 112

A. S. McEwen, C. J. Hansen, W. A. Delamere, E. M. Eliason, K. E. Herkenhoff, L. Keszthelyi, V. C. Gulick, R. L. Kirk, M. T. Mellon, J. A. Grant, N. Thomas, C. M. Weitz, S. W. Squyres, N. T. Bridges, S. L. Murchie, F. Seelos, K. Seelos, C. H. Okubo, M. P. Milazzo, L. L. Tornabene, W. L. Jaeger, S. Byrne, P. S. Russell, J. L. Griffes, S. Martinez-Alonso, A. Davatzes, F. C. Chuang, B. J. Thomson, K. E. Fishbaugh, C. M. Dundas, K. J. Kolb, M. E. Banks, J. J. Wray, (2007), A closer look at water-related geologic activity on Mars, Science, 317, 1706-1709

Alfred S. McEwen, Eric M. Eliason, James W. Bergstrom, Nathan T. Bridges, Candice J. Hansen, W. Alan Delamere, John A. Grant, Virginia C. Gulick, Kenneth E. Herkenhoff, Laszlo Keszthelyi, Randolph L. Kirk, Michael T. Mellon, Steven W. Squyres, Nicolas Thomas, Catherine M. Weitz, (2007), Mars Reconnaissance Orbiter's High Resolution Imaging Science Experiment (HiRISE), Journal of Geophysical Research-Planets, 112

Nathan T. Bridges, Claire N. Lackner, (2006), Northern hemisphere Martian gullies and mantled terrain: Implications for near-surface water migration in Mars' recent past, Journal of Geophysical Research-Planets, 111

NT Bridges, J Phoreman, BR White, R Greeley, EE Eddlemon, GR Wilson, CJ Meyer, (2005), Trajectories and energy transfer of saltating particles onto rock surfaces: Application to abrasion and ventifact formation on Earth and Mars, Journal of Geophysical Research-Planets, 110

NT Bridges, JE Laity, R Greeley, J Phoreman, EE Eddlemon, (2004), Insights on rock abrasion and ventifact formation from laboratory and field analog studies with applications to Mars, Planetary and Space Science, 52, 199-213

FS Anderson, AFC Haldemann, NT Bridges, MP Golombek, TJ Parker, G Neumann, (2003), Analysis of MOLA data for the Mars Exploration Rover landing sites, Journal of Geophysical Research-Planets, 108

MP Golombek, JA Grant, TJ Parker, DM Kass, JA Crisp, SW Squyres, AFC Haldemann, M Adler, WJ Lee, NT Bridges, RE Arvidson, MH Carr, RL Kirk, PC Knocke, RB Roncoli, CM Weitz, JT Schofield, RW Zurek, PR Christensen, RL Fergason, FS Anderson, JW Rice, (2003), Selection of the Mars Exploration Rover landing sites, Journal of Geophysical Research-Planets, 108

TZ Martin, NT Bridges, JR Murphy, (2003), Near-surface temperatures at proposed Mars Exploration Rover landing sites, Journal of Geophysical Research-Planets, 108

NT Bridges, KE Herkenhoff, (2002), Topography and geologic characteristics of aeolian grooves in the south polar layered deposits of Mars, Icarus, 156, 387-398

R Greeley, NT Bridges, RO Kuzmin, JE Laity, (2002), Terrestrial analogs to wind-related features at the Viking and Pathfinder landing sites on Mars, Journal of Geophysical Research-Planets, 107

NT Bridges, JA Crisp, JF Bell, (2001), Characteristics of the Pathfinder APXS sites: Implications for the composition of Martian rocks and soils, Journal of Geophysical Research-Planets, 106, 14621-14665

JF Bell, HY McSween, JA Crisp, RV Morris, SL Murchie, NT Bridges, JR Johnson, DT Britt, MP Golombek, HJ Moore, A Ghosh, JL Bishop, RC Anderson, J Bruckner, T Economou, JP Greenwood, HP Gunnlaugsson, RM Hargraves, S Hviid, JM Knudsen, MB Madsen, R Reid, R Rieder, L Soderblom, (2000), Mineralogic and compositional properties of Martian soil and dust: Results from Mars Pathfinder, Journal of Geophysical Research-Planets, 105, 1721-1755

MP Golombek, NT Bridges, (2000), Erosion rates on Mars and implications for climate change: Constraints from the Pathfinder landing site, Journal of Geophysical Research-Planets, 105, 1841-1853

R Greeley, MD Kraft, RO Kuzmin, NT Bridges, (2000), Mars Pathfinder landing site: Evidence for a change in wind regime from lander and orbiter data, Journal of Geophysical Research-Planets, 105, 1829-1840

AR Vasavada, JP Williams, DA Paige, KE Herkenhoff, NT Bridges, R Greeley, BC Murray, DS Bass, KS McBride, (2000), Surface properties of Mars' polar layered deposits and polar landing sites, Journal of Geophysical Research-Planets, 105, 6961-6969

NT Bridges, R Greeley, AFC Haldemann, KE Herkenhoff, M Kraft, TJ Parker, AW Ward, (1999), Ventifacts at the Pathfinder landing site, Journal of Geophysical Research-Planets, 104, 8595-8615

MP Golombek, RC Anderson, JR Barnes, JF Bell, NT Bridges, DT Britt, J Bruckner, RA Cook, D Crisp, JA Crisp, T Economou, WM Folkner, R Greeley, RM Haberle, RB Hargraves, JA Harris, AFC Haldemann, KE Herkenhoff, SF Hviid, R Jaumann, JR Johnson, PH Kallemeyn, HU Keller, RL Kirk, JM Knudsen, S Larsen, MT Lemmon, MB Madsen, JA Magalhaes, JN Maki, MC Malin, RM Manning, J Matijevic, HY McSween, HJ Moore, SL Murchie, JR Murphy, TJ Parker, R Rieder, TP Rivellini, JT Schofield, A Seiff, RB Singer, PH Smith, LA Soderblom, DA Spencer, CR Stoker, R Sullivan, N Thomas, SW Thurman, MG Tomasko, RM Vaughan, H Wanke, AW Ward, GR Wilson, (1999), Overview of the Mars Pathfinder Mission: Launch through landing, surface operations, data sets, and science results, Journal of Geophysical Research-Planets, 104, 8523-8553

JR Johnson, R Kirk, LA Soderblom, L Gaddis, RJ Reid, DT Britt, P Smith, M Lemmon, N Thomas, JF Bell, NT Bridges, R Anderson, KE Herkenhoff, J Maki, S Murchie, A Dummel, R Jaumann, F Trauthan, G Arnold, (1999), Preliminary results on photometric properties of materials at the Sagan Memorial Station, Mars, Journal of Geophysical Research-Planets, 104, 8809-8830

HY McSween, SL Murchie, JA Crisp, NT Bridges, RC Anderson, JF Bell, DT Britt, J Bruckner, G Dreibus, T Economou, A Ghosh, MP Golombek, JP Greenwood, JR Johnson, HJ Moore, RV Morris, TJ Parker, R Rieder, R Singer, H Wanke, (1999), Chemical, multispectral, and textural constraints on the composition and origin of rocks at the Mars Pathfinder landing site, Journal of Geophysical Research-Planets, 104, 8679-8715

NT Bridges, (1997), Ambient effects on basalt and rhyolite lavas under Venusian, subaerial, and subaqueous conditions, Journal of Geophysical Research-Planets, 102, 9243-9255

NT Bridges, (1997), Characteristics of seamounts near Hawaii as viewed by GLORIA, Marine Geology, 138, 273-301

PH Smith, JF Bell, NT Bridges, DT Britt, L Gaddis, R Greeley, HU Keller, KE Herkenhoff, R Jaumann, JR Johnson, RL Kirk, M Lemmon, JN Maki, MC Malin, SL Murchie, J Oberst, TJ Parker, RJ Reid, R Sablotny, LA Soderblom, C Stoker, R Sullivan, N Thomas, MG Tomasko, W Ward, E Wegryn, (1997), Results from the Mars Pathfinder camera, Science, 278, 1758-1765

NT BRIDGES, (1995), SUBMARINE ANALOGS TO VENUSIAN PANCAKE DOMES, Geophysical Research Letters, 22, 2781-2784