World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
73
Citations
15452
World Ranking
1452
National Ranking
618

Martin M. Shafer publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Martin M. Shafer sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 244 publications — 76th percentile

76% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Martin M. Shafer D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Martin M. Shafer sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 73 D-Index — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Martin M. Shafer is affiliated with the University of Wisconsin-Madison in the United States. Their research primarily spans across Environmental Science, Medicine, and Engineering, with substantial contributions in several related subfields.

The main subfields of their work include Health, Toxicology and Mutagenesis, Infectious Diseases, Biomedical Engineering, Electrical and Electronic Engineering, and Atmospheric Science. Their research interests are focused on several core topics such as SARS-CoV-2 detection and testing, Air Quality and Health Impacts, Heavy Metal Exposure and Toxicity, Biosensors and Analytical Detection, Atmospheric Chemistry and Aerosols, Vehicle Emissions and Performance, and Air Quality Monitoring and Forecasting.

Recent published papers by Martin M. Shafer include:

  • Tracing the origin of SARS-CoV-2 omicron-like spike sequences detected in an urban sewershed: a targeted, longitudinal surveillance study of a cryptic wastewater lineage (2024), The Lancet Microbe
  • PFAS concentrations and deposition in precipitation: An intensive 5-month study at National Atmospheric Deposition Program - National trends sites (NADP-NTN) across Wisconsin, USA (2022), Atmospheric Environment
  • Aerosol Oxidative Potential in the Greater Los Angeles Area: Source Apportionment and Associations with Socioeconomic Position (2022), Environmental Science & Technology
  • Elemental composition of fine and coarse particles across the greater Los Angeles area: Spatial variation and contributing sources (2021), Environmental Pollution
  • Contribution of tailpipe and non-tailpipe traffic sources to quasi-ultrafine, fine and coarse particulate matter in southern California (2020), Journal of the Air & Waste Management Association

Frequently collaborating co-authors of Martin M. Shafer include:

  • Kayley H. Janssen
  • Dagmara S. Antkiewicz
  • Marc C. Johnson
  • James J. Schauer
  • Clayton Rushford

Their work has appeared multiple times in several journals, with notable repeated publications in the following venues:

  • Atmospheric Environment
  • Zenodo (CERN European Organization for Nuclear Research)
  • Journal of Exposure Science & Environmental Epidemiology
  • The Journal of Clinical Endocrinology & Metabolism
  • MMWR Morbidity and Mortality Weekly Report

Best Publications

  • Emissions of Metals Associated with Motor Vehicle Roadways

    Glynis C Lough;James J Schauer;June-Soo Park;Martin M Shafer

  • Influences of Watershed Characteristics on Mercury Levels in Wisconsin Rivers

    James P. Hurley;Janina M. Benoit;Christopher L. Babiarz;Martin M. Shafer

  • Characterization of metals emitted from motor vehicles.

    James J Schauer;Glynis C Lough;Martin M Shafer;William F Christensen

  • Cadmium Exposure and Breast Cancer Risk

    Jane A. McElroy;Martin M. Shafer;Amy Trentham-Dietz;John M. Hampton

  • Spatial and temporal variation of chemical composition and mass closure of ambient coarse particulate matter (PM10-2.5) in the Los Angeles area

    Kalam Cheung;Nancy Daher;Winnie Kam;Martin Merrill Shafer

  • Redox activity of urban quasi-ultrafine particles from primary and secondary sources

    Vishal Verma;Zhi Ning;Arthur K. Cho;James J. Schauer

  • Airway inflammation and oxidative potential of air pollutant particles in a pediatric asthma panel

    Ralph J Delfino;Norbert Staimer;Thomas Tjoa;Daniel L Gillen

  • Physicochemical and toxicological profiles of particulate matter in Los Angeles during the October 2007 southern California wildfires.

    Vishal Verma;Andrea Polidori;James J. Schauer;Martin M. Shafer

  • Removal, partitioning, and fate of silver and other metals in wastewater treatment plants and effluent-receiving streams

    Martin M. Shafer;Joel T. Overdier;David E. Armstong

  • Redox activity and chemical speciation of size fractioned PM in the communities of the Los Angeles-Long Beach harbor

    S. Hu;A. Polidori;M. Arhami;M. M. Shafer

  • The origin of water soluble particulate iron in the Asian atmospheric outflow

    P. Y. Chuang;R. M. Duvall;M. M. Shafer;J. J. Schauer

  • Seasonal influences on partitioning and transport of total and methylmercury in rivers from contrasting watersheds

    Christopher L. Babiarz;James P. Hurley;James P. Hurley;Janina M. Benoit;Martin M. Shafer

  • A Macrophage-Based Method for the Assessment of the Reactive Oxygen Species (ROS) Activity of Atmospheric Particulate Matter (PM) and Application to Routine (Daily-24 h) Aerosol Monitoring Studies

    Amy Prasch Landreman;Martin M. Shafer;Jocelyn C. Hemming;Michael P. Hannigan

  • Associations of Primary and Secondary Organic Aerosols With Airway and Systemic Inflammation in an Elderly Panel Cohort

    Ralph J. Delfino;Norbert Staimer;Thomas Tjoa;Mohammad Arhami;Mohammad Arhami

  • Global perspective on the oxidative potential of airborne particulate matter: a synthesis of research findings.

    Arian Saffari;Nancy Daher;Martin M Shafer;James J Schauer

  • Source apportionment of in vitro reactive oxygen species bioassay activity from atmospheric particulate matter.

    Yuanxun Zhang;James J. Schauer;Martin M. Shafer;Michael P. Hannigan

  • Iron Solubility Related to Particle Sulfur Content in Source Emission and Ambient Fine Particles

    M. Oakes;E. D. Ingall;B. Lai;M. M. Shafer

  • The influence of dissolved organic carbon, suspended particulates, and hydrology on the concentration, partitioning and variability of trace metals in two contrasting Wisconsin watersheds (U.S.A.)

    Martin M. Shafer;Joel T. Overdier;James P. Hurley;James P. Hurley;David Armstrong

  • Increased biomass burning due to the economic crisis in Greece and its adverse impact on wintertime air quality in Thessaloniki.

    Arian Saffari;Nancy Daher;Constantini Samara;Dimitra Voutsa

  • Toxic metals in the atmosphere in Lahore, Pakistan.

    Erika von Schneidemesser;Elizabeth A. Stone;Tauseef A. Quraishi;Martin M. Shafer

Frequent Co-Authors

James J. Schauer
James J. Schauer University of Wisconsin–Madison
Constantinos Sioutas
Constantinos Sioutas University of Southern California
David E. Armstrong
David E. Armstrong University of Wisconsin–Madison
Polly A. Newcomb
Polly A. Newcomb Fred Hutchinson Cancer Research Center
Michael H. Bergin
Michael H. Bergin Duke University
Ralph J. Delfino
Ralph J. Delfino University of California, Irvine
Paul A. Solomon
Paul A. Solomon Environmental Protection Agency
Sina Hasheminassab
Sina Hasheminassab University of Southern California
James P. Hurley
James P. Hurley University of Wisconsin–Madison
Johanna W. Lampe
Johanna W. Lampe Fred Hutchinson Cancer Research Center

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