World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
36
Citations
6337
World Ranking
7111
National Ranking
2462

Stephen M. Clifford publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Stephen M. Clifford sits on this spectrum.

38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38 publications 603+

This scientist: 197 publications — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

Stephen M. Clifford D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Stephen M. Clifford sits on this spectrum.

30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 36 D-Index — 23rd percentile

23% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

Overview

Stephen M. Clifford is affiliated with the Planetary Science Institute in the United States. Their research spans multiple areas within chemistry, with a particular focus on supramolecular chemistry and molecular sensors.

Their work covers key fields of study including:

  • Chemistry

More specifically, their subfields of research include:

  • Organic Chemistry
  • Spectroscopy
  • Materials Chemistry

The main topics addressed in their research encompass:

  • Supramolecular Chemistry and Complexes
  • Molecular Sensors and Ion Detection
  • Photochromic and Fluorescence Chemistry

Stephen M. Clifford has contributed to the scientific community through publications in various venues. Notable publication venues include:

  • The Journal of Organic Chemistry
  • Scholarworks (University of Massachusetts Amherst)

The following papers are part of their recent scientific output:

  • "A model for the climatic behavior of water on Mars," published in 2021 in Scholarworks (University of Massachusetts Amherst)
  • "Spontaneous and Selective Macrocyclization in Nitroaldol Reaction Systems," published in 2023 in The Journal of Organic Chemistry

Collaboration is a feature of their research approach. Frequent co-authors include:

  • Yunchuan Qi
  • Mubarak Ayinla
  • Olof Ramström

Best Publications

  • A model for the hydrologic and climatic behavior of water on Mars

    Stephen M. Clifford

  • The Evolution of the Martian Hydrosphere: Implications for the Fate of a Primordial Ocean and the Current State of the Northern Plains

    Stephen M. Clifford;Stephen M. Clifford;Timothy J. Parker;Timothy J. Parker

  • Radar Soundings of the Subsurface of Mars

    Giovanni Picardi;Jeffrey J. Plaut;Daniela Biccari;Ornella Bombaci

  • Subsurface radar sounding of the south polar layered deposits of Mars.

    Jeffrey J. Plaut;Giovanni Picardi;Ali Safaeinili;Anton B. Ivanov

  • Depth of the Martian cryosphere: Revised estimates and implications for the existence and detection of subpermafrost groundwater

    Stephen M. Clifford;Jeremie Lasue;Essam Heggy;Joséphine Boisson

  • Properties of the 67P/Churyumov-Gerasimenko interior revealed by CONSERT radar

    Wlodek Kofman;Alain Herique;Yves Barbin;Jean Pierre Barriot

  • Ice in the Martian regolith

    S. W. Squyres;S. M. Clifford;R. O. Kuz'min;J. R. Zimbelman

  • Polar basal melting on Mars

    Stephen M. Clifford

  • The stability of ground ice in the equatorial region of Mars

    Stephen M. Clifford;Daniel Hillel

  • Radar Sounding of the Medusae Fossae Formation Mars: Equatorial Ice or Dry, Low-Density Deposits?

    Thomas R. Watters;Bruce A. Campbell;Lynn M. Carter;Carl J. Leuschen

  • The state and future of Mars polar science and exploration.

    Stephen M. Clifford;David Crisp;David A. Fisher;Ken E. Herkenhoff

  • Dielectric map of the Martian northern hemisphere and the nature of plain filling materials

    Jérémie Mouginot;Jérémie Mouginot;Antoine Pommerol;Antoine Pommerol;Pierre Beck;Wlodek Kofman

  • The state, potential distribution, and biological implications of methane in the Martian crust

    Michael D. Max;Stephen M. Clifford

  • Martian CH4: Sources, Flux, and Detection

    Tullis C. Onstott;D. McGown;D. McGown;J. Kessler;J. Kessler;B. Sherwood Lollar;B. Sherwood Lollar

  • Absorption and scattering in ground‐penetrating radar: Analysis of the Bishop Tuff

    Robert E. Grimm;Essam Heggy;Stephen M. Clifford;Cynthia L. Dinwiddie

  • Gale Crater: Formation and post-impact hydrous environments

    S.P. Schwenzer;S.P. Schwenzer;O. Abramov;O. Abramov;C.C. Allen;J.C. Bridges

  • Quantitative Assessments of the Martian Hydrosphere

    Jeremie Lasue;Nicolas Mangold;Ernst Hauber;Steve Clifford

  • WISDOM GPR Designed for Shallow and High-Resolution Sounding of the Martian Subsurface

    Valérie Ciarletti;C Corbel;D Plettemeier;P Cais

  • Knudsen diffusion: the effect of small pore size and low gas pressure on gaseous transport in soil

    Stephen M. Clifford;Daniel Hillel

  • Initiation of Martian outflow channels: Related to the dissociation of gas hydrate?

    Michael D. Max;Stephen M. Clifford

  • Modeling tsunami propagation and the emplacement of thumbprint terrain in an early Mars ocean

    Francois Costard;Antoine Séjourné;Karim Kelfoun;Stephen Clifford

Frequent Co-Authors

Wlodek Kofman
Wlodek Kofman Grenoble Alpes University
Jeremie Mouginot
Jeremie Mouginot Grenoble Alpes University
Giovanni Picardi
Giovanni Picardi Sapienza University of Rome
Jeffrey J. Plaut
Jeffrey J. Plaut Jet Propulsion Lab
Roberto Orosei
Roberto Orosei National Institute for Astrophysics
Robert E. Grimm
Robert E. Grimm Southwest Research Institute
Horton E. Newsom
Horton E. Newsom University of New Mexico
Roger J. Phillips
Roger J. Phillips Washington University in St. Louis
Thomas R. Watters
Thomas R. Watters Smithsonian Institution
Susanne P. Schwenzer
Susanne P. Schwenzer The Open University

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Related Online Degrees & Career Pathways

For those interested in expanding their expertise beyond Earth Science, there are several related online degrees that complement this field. A library degree, for example, offers skills in data management and research that are valuable for organizing geological and environmental information.

Visual documentation plays a significant role in Earth Science careers. Pursuing degrees in digital imaging can be a great option, with many reputable photography colleges online providing flexible learning paths. Veterans interested in this creative field will find specialized support through online photography degree programs for veterans, helping to transition skills into civilian roles.

Language skills also open doors in scientific communication and collaboration. Earning one of the spanish degrees online offers practical benefits in the global scientific community, especially in areas where Spanish is widely spoken.

Choosing any of these supplementary degrees can significantly enhance career opportunities, allowing for a multidisciplinary approach to Earth Science professions.

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