| A model for the hydrologic and climatic behavior of water on Mars SM Clifford Journal of Geophysical Research: Planets 98 (E6), 10973-11016, 1993 | 848 | 1993 |
| The evolution of the Martian hydrosphere: Implications for the fate of a primordial ocean and the current state of the northern plains SM Clifford, TJ Parker Icarus 154 (1), 40-79, 2001 | 728 | 2001 |
| Radar soundings of the subsurface of Mars G Picardi, JJ Plaut, D Biccari, O Bombaci, D Calabrese, M Cartacci, ... science 310 (5756), 1925-1928, 2005 | 440 | 2005 |
| Subsurface radar sounding of the south polar layered deposits of Mars JJ Plaut, G Picardi, A Safaeinili, AB Ivanov, SM Milkovich, A Cicchetti, ... science 316 (5821), 92-95, 2007 | 392 | 2007 |
| Depth of the Martian cryosphere: Revised estimates and implications for the existence and detection of subpermafrost groundwater SM Clifford, J Lasue, E Heggy, J Boisson, P McGovern, MD Max Journal of Geophysical Research: Planets 115 (E7), 2010 | 260 | 2010 |
| Properties of the 67P/Churyumov-Gerasimenko interior revealed by CONSERT radar W Kofman, A Herique, Y Barbin, JP Barriot, V Ciarletti, S Clifford, ... Science 349 (6247), aab0639, 2015 | 255 | 2015 |
| Ice in the martian megaregolith SW Squyres, SM Clifford, RO Kuzmin, JR Zimbelman, F Costard Mars, 1992 | 219 | 1992 |
| Polar basal melting on Mars SM Clifford Journal of Geophysical Research: Solid Earth 92 (B9), 9135-9152, 1987 | 186 | 1987 |
| The stability of ground ice in the equatorial region of Mars SM Clifford, D Hillel Journal of Geophysical Research: Solid Earth 88 (B3), 2456-2474, 1983 | 186 | 1983 |
| Radar sounding of the Medusae Fossae Formation Mars: equatorial ice or dry, low-density deposits? TR Watters, B Campbell, L Carter, CJ Leuschen, JJ Plaut, G Picardi, ... Science 318 (5853), 1125-1128, 2007 | 161 | 2007 |
| The state and future of Mars polar science and exploration SM Clifford, D Crisp, DA Fisher, KE Herkenhoff, SE Smrekar, PC Thomas, ... Icarus 144 (2), 210-242, 2000 | 157 | 2000 |
| Dielectric map of the Martian northern hemisphere and the nature of plain filling materials J Mouginot, A Pommerol, P Beck, W Kofman, SM Clifford Geophysical research letters 39 (2), 2012 | 146 | 2012 |
| The state, potential distribution, and biological implications of methane in the Martian crust MD Max, SM Clifford Journal of Geophysical Research: Planets 105 (E2), 4165-4171, 2000 | 117 | 2000 |
| Martian CH4: Sources, Flux, and Detection TC Onstott, D McGown, J Kessler, BS Lollar, KK Lehmann, SM Clifford Astrobiology 6 (2), 377-395, 2006 | 111 | 2006 |
| Absorption and scattering in ground‐penetrating radar: Analysis of the Bishop Tuff RE Grimm, E Heggy, S Clifford, C Dinwiddie, R McGinnis, D Farrell Journal of Geophysical Research: Planets 111 (E6), 2006 | 97 | 2006 |
| Gale Crater: Formation and post-impact hydrous environments SP Schwenzer, O Abramov, CC Allen, JC Bridges, SM Clifford, J Filiberto, ... Planetary and Space Science 70 (1), 84-95, 2012 | 93 | 2012 |
| WISDOM GPR designed for shallow and high-resolution sounding of the Martian subsurface V Ciarletti, C Corbel, D Plettemeier, P Cais, SM Clifford, SE Hamran Proceedings of the IEEE 99 (5), 824-836, 2011 | 93 | 2011 |
| Quantitative assessments of the Martian hydrosphere J Lasue, N Mangold, E Hauber, S Clifford, W Feldman, O Gasnault, ... Space Science Reviews 174, 155-212, 2013 | 92 | 2013 |
| Knudsen diffusion: The effect of small pore size and low gas pressure on gaseous transport in soil SM Clifford, D Hillel Soil science 141 (4), 289-297, 1986 | 80 | 1986 |
| The WISDOM radar: unveiling the subsurface beneath the ExoMars Rover and identifying the best locations for drilling V Ciarletti, S Clifford, D Plettemeier, A Le Gall, Y Hervé, S Dorizon, ... Astrobiology 17 (6-7), 565-584, 2017 | 75 | 2017 |
Essam HeggyNASA Jet Propulsion Laboratory, CaltechVerified email at jpl.nasa.gov