World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
44
Citations
8738
World Ranking
4651
National Ranking
1774

Peter B. McMahon 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 Peter B. McMahon 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: 119 publications — 21st percentile

21% of scientists in this discipline score the same or lower.

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

Peter B. McMahon 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 Peter B. McMahon 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: 44 D-Index — 50th percentile

50% of scientists in this discipline score the same or lower.

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

Overview

Peter B. McMahon is affiliated with the United States Geological Survey in the United States. Their research primarily focuses on environmental science and engineering, engaging extensively in subfields such as global and planetary change, mechanics of materials, geochemistry and petrology, environmental engineering, and environmental chemistry.

The scientist's work covers a broad spectrum of topics within environmental and earth sciences. Key areas of research include:

  • Atmospheric and Environmental Gas Dynamics
  • Hydrocarbon exploration and reservoir analysis
  • Groundwater and Isotope Geochemistry
  • Groundwater flow and contamination studies
  • Geochemistry and Geologic Mapping
  • Fluoride Effects and Removal
  • Water Quality and Resources Studies

Peter B. McMahon has contributed to numerous scientific publications, frequently appearing in journals such as The Science of The Total Environment, Applied Geochemistry, and Chemical Geology. The following are selected recent papers authored by them:

  • "Perfluoroalkyl and Polyfluoroalkyl Substances in Groundwater Used as a Source of Drinking Water in the Eastern United States," 2022, Environmental Science & Technology
  • "Fluoride occurrence in United States groundwater," 2020, The Science of The Total Environment

The scientist often collaborates with several coauthors, including Andrew G. Hunt, Justin T. Kulongoski, Janice M. Gillespie, David H. Shimabukuro, and Tracy A. Davis. These collaborative efforts contribute to the breadth and depth of research output spanning multiple related topics and fields.

Peter B. McMahon's frequent publication venues reflect a focus on environmental and earth sciences, with a measurable presence in journals and reports such as The Science of The Total Environment, Applied Geochemistry, Chemical Geology, Antarctica A Keystone in a Changing World, and Scientific Investigations Report.

Best Publications

  • Groundwater depletion and sustainability of irrigation in the US High Plains and Central Valley

    Bridget R. Scanlon;Claudia C. Faunt;Laurent Longuevergne;Robert C. Reedy

  • Redox Processes and Water Quality of Selected Principal Aquifer Systems

    P.B. McMahon;F.H. Chapelle

  • Deducing the Distribution of Terminal Electron‐Accepting Processes in Hydrologically Diverse Groundwater Systems

    Francis H. Chapelle;Peter B. McMahon;Neil M. Dubrovsky;Roger F. Fujii

  • Microbial production of organic acids in aquitard sediments and its role in aquifer geochemistry

    Peter B. McMahon;Francis H. Chapelle

  • Climate Variability Controls on Unsaturated Water and Chemical Movement, High Plains Aquifer, USA

    Jason J. Gurdak;Randall T. Hanson;Peter B. McMahon;Breton W. Bruce

  • Effect of nitrate, organic carbon, and temperature on potential denitrification rates in nitrate-rich riverbed sediments

    Unknown

  • Geochemistry of dissolved inorganic carbon in a Coastal Plain aquifer. 1. Sulfate from confining beds as an oxidant in microbial CO2 production

    Francis H. Chapelle;Peter B. McMahon

  • Storage and transit time of chemicals in thick unsaturated zones under rangeland and irrigated cropland, High Plains, United States

    P. B. McMahon;K. F. Dennehy;B. W. Bruce;J. K. Böhlke

  • N2O Emissions from a Nitrogen-Enriched River

    P.B. McMahon;K.F. Dennehy

  • Denitrification and mixing in a stream—aquifer system: effects on nitrate loading to surface water

    P.B. McMahon;J.K. Böhlke

  • A comparison of recharge rates in aquifers of the United States based on groundwater-age data

    P. B. McMahon;L. N. Plummer;J. K. Böhlke;S. D. Shapiro

  • Geochemistry, radiocarbon ages, and paleorecharge conditions along a transect in the central High Plains aquifer, southwestern Kansas, USA

    P.B. McMahon;J.K. Böhlke;S.C. Christenson

  • Elevated Manganese Concentrations in United States Groundwater, Role of Land Surface-Soil-Aquifer Connections.

    Peter B. McMahon;Kenneth Belitz;James E. Reddy;Tyler D. Johnson

  • Biotransformation of caffeine, cotinine, and nicotine in stream sediments: implications for use as wastewater indicators.

    Paul M. Bradley;Larry B. Barber;Dana W. Kolpin;Peter B. McMahon

  • Using chemical, hydrologic, and age dating analysis to delineate redox processes and flow paths in the riparian zone of a glacial outwash aquifer-stream system

    Larry J. Puckett;Timothy K. Cowdery;Peter B. McMahon;Lan H. Tornes

  • Fate of effluent-borne contaminants beneath septic tank drainfields overlying a Karst aquifer.

    Brian G. Katz;Dale W. Griffin;Peter B. McMahon;Harmon S. Harden

  • Biodegradation of 17β-Estradiol, Estrone and Testosterone in Stream Sediments

    Paul M. Bradley;Larry B. Barber;Francis H. Chapelle;James L. Gray

  • Brackish groundwater in the United States

    Jennifer S. Stanton;David W. Anning;Craig J. Brown;Richard B. Moore

  • Source and transport controls on the movement of nitrate to public supply wells in selected principal aquifers of the United States

    P. B. McMahon;J. K. Böhlke;L. J. Kauffman;K. L. Kipp

  • The quality of our Nation's waters: water quality in Principal Aquifers of the United States, 1991-2010

    Leslie A. DeSimone;Peter B. McMahon;Michael R. Rosen

  • Regional patterns in the isotopic composition of natural and anthropogenic nitrate in groundwater, high plains, U.S.A

    P. B. McMahon;J. K. Bohlke

Frequent Co-Authors

Francis H. Chapelle
Francis H. Chapelle United States Geological Survey
Andrew G. Hunt
Andrew G. Hunt United States Geological Survey
Paul M. Bradley
Paul M. Bradley United States Geological Survey
John Karl Böhlke
John Karl Böhlke United States Geological Survey
Kenneth Belitz
Kenneth Belitz United States Geological Survey
Mark A. Engle
Mark A. Engle The University of Texas at El Paso
Larry B. Barber
Larry B. Barber United States Geological Survey
Dana W. Kolpin
Dana W. Kolpin United States Geological Survey
Avner Vengosh
Avner Vengosh Duke University
James T. Morris
James T. Morris University of South Carolina

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