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Earth Science
USA
2026

D-Index & Metrics

Earth Science

D-Index
93
Citations
35227
World Ranking
213
National Ranking
109

Roger N. Clark 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 Roger N. Clark 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: 571 publications — 99th percentile

99% of scientists in this discipline score the same or lower.

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

Roger N. Clark 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 Roger N. Clark 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: 93 D-Index — 98th percentile

98% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Earth Science in United States Leader Award
  • 2025 - Research.com Earth Science in United States Leader Award

Overview

Roger N. Clark is affiliated with the Planetary Science Institute in the United States. Their research primarily revolves around the field of Physics and Astronomy, with a particular concentration on Astronomy and Astrophysics. Their work also spans across subfields such as Ecology, Ecology, Evolution, Behavior and Systematics, Atmospheric Science, and Artificial Intelligence.

The main topics addressed in their research include:

  • Planetary Science and Exploration
  • Astro and Planetary Science
  • Geochemistry and Geologic Mapping
  • Isotope Analysis in Ecology
  • Aeolian processes and effects
  • Marine Biology and Ecology Research
  • Aquatic Invertebrate Ecology and Behavior

The frequent venues where Roger N. Clark has published their research include:

  • The Planetary Science Journal
  • The Festivus
  • Space Science Reviews
  • Zenodo (CERN European Organization for Nuclear Research)
  • Atmospheric chemistry and physics

Recent publications authored or co-authored by Roger N. Clark cover a range of topics related to remote sensing, planetary habitability, and molecular phylogeny. Selected papers include:

  • Quantifying uncertainty for remote spectroscopy of surface composition (2020) in Remote Sensing of Environment
  • On-orbit calibration and performance of the EMIT imaging spectrometer (2024) in Remote Sensing of Environment
  • Investigating Europa's Habitability with the Europa Clipper (2023) in Space Science Reviews
  • Molecular phylogeny and revised classification of the Buccinoidea (Neogastropoda) (2021) in Zoological Journal of the Linnean Society
  • The Mapping Imaging Spectrometer for Europa (MISE) (2024) in Space Science Reviews

Roger N. Clark collaborates frequently with a network of co-authors including Amanda Hendrix, Philip G. Brodrick, Carlos Pérez García-Pando, M. D. Dyar, and Gregg A. Swayze. These collaborations reflect a multidisciplinary approach across planetary science and related ecological and geological studies.

Best Publications

  • Reflectance spectroscopy: Quantitative analysis techniques for remote sensing applications

    Roger N. Clark;Ted L. Roush

  • High spectral resolution reflectance spectroscopy of minerals

    Roger N. Clark;Trude V. V. King;Matthew Klejwa;Gregg A. Swayze

  • USGS Digital Spectral Library splib06a

    Roger N. Clark;Gregg A. Swayze;Richard A. Wise;K. Eric Livo

  • Spectroscopic Determination of Leaf Biochemistry Using Band-Depth Analysis of Absorption Features and Stepwise Multiple Linear Regression

    Raymond F. Kokaly;Roger N. Clark

  • Imaging spectroscopy: Earth and planetary remote sensing with the USGS Tetracorder and expert systems

    Roger N. Clark;Gregg A. Swayze;K. Eric Livo;Raymond F. Kokaly

  • Character and Spatial Distribution of OH/H2O on the Surface of the Moon Seen by M3 on Chandrayaan-1

    C. M. Pieters;J. N. Goswami;J. N. Goswami;R. N. Clark;M. Annadurai

  • Hydrated silicate minerals on Mars observed by the Mars Reconnaissance Orbiter CRISM instrument

    John F. Mustard;Scott L. Murchie;S. M. Pelkey;B. L. Ehlmann

  • Orbital Identification of Carbonate-Bearing Rocks on Mars

    Bethany L. Ehlmann;John F. Mustard;Scott L. Murchie;Francois Poulet

  • The US Geological Survey, digital spectral reflectance library: version 1: 0.2 to 3.0 microns

    Roger N. Clark;Gregg A. Swayze;Trude V. V. King;Andrea J. Gallagher

  • Identification of hydrated silicate minerals on Mars using MRO‐CRISM: Geologic context near Nili Fossae and implications for aqueous alteration

    Bethany L. Ehlmann;John F. Mustard;Gregg A. Swayze;Roger N. Clark

  • USGS Spectral Library Version 7

    Raymond F. Kokaly;Roger N. Clark;Gregg A. Swayze;K. Eric Livo

  • A synthesis of Martian aqueous mineralogy after 1 Mars year of observations from the Mars Reconnaissance Orbiter

    Scott L. Murchie;John F. Mustard;Bethany L. Ehlmann;Ralph E. Milliken

  • State of the art satellite and airborne marine oil spill remote sensing: Application to the BP Deepwater Horizon oil spill

    Ira Leifer;William J. Lehr;Debra Simecek-Beatty;Eliza Bradley

  • Detection of crystalline hematite mineralization on Mars by the Thermal Emission Spectrometer: Evidence for near‐surface water

    Philip Christensen;J. L. Bandfield;R. N. Clark;K. S. Edgett

  • Detection of Adsorbed Water and Hydroxyl on the Moon

    Roger N. Clark

  • Opaline silica in young deposits on Mars

    Ralph E. Milliken;Gregg A. Swayze;Raymond E. Arvidson;Janice L Bishop

  • Mapping vegetation in Yellowstone National Park using spectral feature analysis of AVIRIS data

    Raymond F Kokaly;Don G Despain;Roger N Clark;K.Eric Livo

  • Hydrogen Peroxide on the Surface of Europa

    R. W. Carlson;M. S. Anderson;R. E. Johnson;W. D. Smythe

  • Thermal emission spectrometer experiment: Mars Observer mission

    Philip R. Christensen;Donald L. Anderson;Stillman C. Chase;Roger N. Clark

  • Using Imaging Spectroscopy To Map Acidic Mine Waste

    G.A. Swayze;K.S. Smith;R. N. Clark;S. J. Sutley

Frequent Co-Authors

Robert H. Brown
Robert H. Brown University of Massachusetts Chan Medical School
Jason W. Barnes
Jason W. Barnes University of Idaho
Ralf Jaumann
Ralf Jaumann Freie Universität Berlin
Dale P. Cruikshank
Dale P. Cruikshank University of Central Florida
Christophe Sotin
Christophe Sotin Jet Propulsion Lab
Katrin Stephan
Katrin Stephan German Aerospace Center
S. Le Mouélic
S. Le Mouélic University of Nantes
Gregg A. Swayze
Gregg A. Swayze United States Geological Survey
P. Drossart
P. Drossart Université Paris Cité

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