World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
56
Citations
8737
World Ranking
2487
National Ranking
1040

Thomas M. Johnson 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 Thomas M. Johnson sits on this spectrum.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

This scientist: 124 publications — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 510 publications or more.

Thomas M. Johnson 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 Thomas M. Johnson sits on this spectrum.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

This scientist: 56 D-Index — 69th percentile

69% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 94 D-Index or more.

Overview

Thomas M. Johnson is affiliated with the University of Illinois at Urbana-Champaign in the United States. Their research primarily focuses on Environmental Science and Earth and Planetary Sciences, with a significant number of publications in these fields.

The scientist's work spans across several subfields, including Geochemistry and Petrology, Nutrition and Dietetics, Health, Toxicology and Mutagenesis, Inorganic Chemistry, and Pollution. The main topics covered in their research include Selenium in Biological Systems, Geochemistry and Elemental Analysis, Mercury impact and mitigation studies, Radioactive element chemistry and processing, Heavy metals in the environment, Radioactive contamination and transfer, and Isotope Analysis in Ecology.

Frequent coauthors who have collaborated closely with Thomas M. Johnson include:

  • Xiangli Wang
  • Kathrin Schilling
  • Jian-Ming Zhu
  • Decan Tan
  • Naomi L. Wasserman

The venues in which they have published multiple papers include:

  • Geochimica et Cosmochimica Acta
  • Analytical Chemistry
  • ACS Earth and Space Chemistry
  • The Science of The Total Environment
  • Abstracts with programs - Geological Society of America

Notable recent papers authored or co-authored by Thomas M. Johnson are:

  • A critical review on the occurrence and distribution of the uranium- and thorium-decay nuclides and their effect on the quality of groundwater, 2021, The Science of The Total Environment
  • Selenium isotope fractionation during adsorption by Fe, Mn and Al oxides, 2020, Geochimica et Cosmochimica Acta
  • Microbial U Isotope Fractionation Depends on the U(VI) Reduction Rate, 2020, Environmental Science & Technology
  • Mass-dependent selenium isotopic fractionation during microbial reduction of seleno-oxyanions by phylogenetically diverse bacteria, 2020, Geochimica et Cosmochimica Acta
  • Selenium isotope fractionation during adsorption onto montmorillonite and kaolinite, 2021, Applied Clay Science

Best Publications

  • Low Mid-Proterozoic atmospheric oxygen levels and the delayed rise of animals

    Noah J. Planavsky;Christopher T. Reinhard;Xiangli Wang;Danielle Thomson

  • Evidence for oxygenic photosynthesis half a billion years before the Great Oxidation Event

    Noah J. Planavsky;Dan Asael;Axel Hofmann;Christopher T. Reinhard

  • Chromium isotopes and the fate of hexavalent chromium in the environment

    Andre S. Ellis;Thomas Martin Johnson;Thomas D. Bullen

  • Groundwater Age and Groundwater Age Dating

    Craig M. Bethke;Thomas M. Johnson

  • Assessment of low impact development for managing stormwater with changing precipitation due to climate change

    Christopher Pyke;Meredith P. Warren;Thomas Johnson;James LaGro

  • Selenium isotope ratios as indicators of selenium sources and oxyanion reduction

    Thomas M. Johnson;Mitchell J. Herbel;Mitchell J. Herbel;Thomas D. Bullen;Peter T. Zawislanski

  • Using chromium stable isotope ratios to quantify Cr(VI) reduction: lack of sorption effects.

    Andre S. Ellis;Thomas M. Johnson;Thomas D. Bullen

  • Paradox of groundwater age

    Craig M. Bethke;Thomas Martin Johnson

  • Mass-Dependent Fractionation of Selenium and Chromium Isotopes in Low-Temperature Environments

    Thomas Martin Johnson;Thomas D. Bullen

  • Uranium isotopic fractionation factors during U(VI) reduction by bacterial isolates

    Anirban Basu;Robert A Sanford;Thomas Martin Johnson;Craig Campbell Lundstrom

  • Microbial mass-dependent fractionation of chromium isotopes

    Eric R. Sikora;Thomas M. Johnson;Thomas D. Bullen

  • Interpretation of isotopic data in groundwater‐rock systems: Model development and application to Sr isotope data from Yucca Mountain

    Thomas Martin Johnson;Donald J. DePaolo

  • Uranium 238U/235U isotope ratios as indicators of reduction: results from an in situ biostimulation experiment at Rifle, Colorado, U.S.A.

    Charles John Bopp;Craig Campbell Lundstrom;Thomas Martin Johnson;Robert A Sanford

  • The isotopic composition of authigenic chromium in anoxic marine sediments: A case study from the Cariaco Basin

    Christopher T. Reinhard;Noah J. Planavsky;Xiangli Wang;Xiangli Wang;Woodward W. Fischer

  • Selenium isotope fractionation during reduction by Fe(II)-Fe(III) hydroxide-sulfate (green rust)

    Thomas M. Johnson;Thomas D. Bullen

  • A review of mass-dependent fractionation of selenium isotopes and implications for other heavy stable isotopes

    Thomas M Johnson

  • A Review of Water Quality Responses to Air Temperature and Precipitation Changes 2: Nutrients, Algal Blooms, Sediment, Pathogens

    Rory Coffey;Michael J. Paul;Jen Stamp;Anna Hamilton

  • Fractionation of selenium isotopes during bacterial respiratory reduction of selenium oxyanions

    Mitchell J. Herbel;Thomas M. Johnson;Ronald S. Oremland;Thomas D. Bullen

  • Variations in 238U/235U in uranium ore deposits: Isotopic signatures of the U reduction process?

    Charles John Bopp;Craig C. Lundstrom;Thomas M. Johnson;Justin J.G. Glessner

  • Effective isotopic fractionation factors for solute removal by reactive sediments: a laboratory microcosm and slurry study.

    Scott K. Clark;Thomas M. Johnson

  • Cr Stable Isotopes As Indicators of Cr(VI) Reduction in Groundwater: A Detailed Time-Series Study of a Point-Source Plume

    Emily C. Berna;Thomas Martin Johnson;Richard S. Makdisi;Anirban Basu

Frequent Co-Authors

Thomas D. Bullen
Thomas D. Bullen United States Geological Survey
Craig C. Lundstrom
Craig C. Lundstrom University of Illinois at Urbana-Champaign
Christopher T. Reinhard
Christopher T. Reinhard Georgia Institute of Technology
Noah J. Planavsky
Noah J. Planavsky Yale University
Donald J. DePaolo
Donald J. DePaolo Lawrence Berkeley National Laboratory
Paul R.D. Mason
Paul R.D. Mason Utrecht University
Timothy W. Lyons
Timothy W. Lyons University of California, Riverside
Craig M. Bethke
Craig M. Bethke University of Illinois at Urbana-Champaign
Wolfgang Wilcke
Wolfgang Wilcke Karlsruhe Institute of Technology
Philip E. Long
Philip E. Long Lawrence Berkeley National Laboratory

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