World's Best Scientists 2026 revealed!
Barbara Sherwood Lollar

Barbara Sherwood Lollar

D-Index & Metrics

Environmental Sciences

D-Index
63
Citations
12115
World Ranking
2518
National Ranking
105

Barbara Sherwood Lollar 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 Barbara Sherwood Lollar 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: 179 publications — 56th percentile

56% of scientists in this discipline score the same or lower.

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

Barbara Sherwood Lollar 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 Barbara Sherwood Lollar 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: 63 D-Index — 75th percentile

75% of scientists in this discipline score the same or lower.

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

Overview

Barbara Sherwood Lollar is affiliated with the University of Toronto in Canada. Their research primarily focuses on environmental science and engineering, with significant contributions in environmental chemistry, mechanics of materials, global and planetary change, environmental engineering, and ecology.

The scientist's work concentrates on topics including methane hydrates and related phenomena, hydrocarbon exploration and reservoir analysis, atmospheric and environmental gas dynamics, groundwater flow and contamination studies, geology and paleoclimatology research, groundwater and isotope geochemistry, and CO2 sequestration and geologic interactions.

Frequent co-authors collaborating with Barbara Sherwood Lollar include:

  • Oliver Warr
  • C. J. Ballentine
  • Thomas Giunta
  • Jon Gluyas
  • Anran Cheng

The scientist's recent papers illustrate a range of research interests and publication venues:

  • "Hydrothermal 15N15N abundances constrain the origins of mantle nitrogen," 2020, Nature
  • "Sulfidated nano zerovalent iron (S-nZVI) for in situ treatment of chlorinated solvents: A field study," 2020, Water Research
  • "A window into the abiotic carbon cycle - Acetate and formate in fracture waters in 2.7 billion year-old host rocks of the Canadian Shield," 2020, Geochimica et Cosmochimica Acta
  • "Crustal Groundwater Volumes Greater Than Previously Thought," 2021, Geophysical Research Letters
  • "High-resolution, long-term isotopic and isotopologue variation identifies the sources and sinks of methane in a deep subsurface carbon cycle," 2020, Geochimica et Cosmochimica Acta

Barbara Sherwood Lollar frequently publishes in the following venues:

  • Geochimica et Cosmochimica Acta
  • Goldschmidt Abstracts
  • Abstracts with programs - Geological Society of America
  • Nature Communications
  • Goldschmidt2021 abstracts

Best Publications

  • ABIOTIC METHANE ON EARTH

    Giuseppe Etiope;Giuseppe Etiope;Barbara Sherwood Lollar

  • Solubility trapping in formation water as dominant CO2 sink in natural gas fields

    Stuart M V Gilfillan;Barbara Sherwood Lollar;Greg Holland;David Blagburn

  • Long-term sustainability of a high-energy, low-diversity crustal biome.

    Li-Hung Lin;Li-Hung Lin;Pei-Ling Wang;Douglas Rumble;Johanna Lippmann-Pipke

  • A new analysis of Mars "Special Regions": findings of the second MEPAG Special Regions Science Analysis Group (SR-SAG2)

    John D. Rummel;David W. Beaty;Melissa A. Jones;Corien Bakermans

  • The contribution of the Precambrian continental lithosphere to global H2 production.

    Barbara Sherwood Lollar;T. C. Onstott;G. Lacrampe-Couloume;C. J. Ballentine

  • The noble gas geochemistry of natural CO2 gas reservoirs from the Colorado Plateau and Rocky Mountain provinces, USA

    Stuart M V Gilfillan;Chris J. Ballentine;Greg Holland;David Blagburn

  • The yield and isotopic composition of radiolytic H2, a potential energy source for the deep subsurface biosphere

    Li-Hung Lin;Greg F. Slater;Greg F. Slater;Barbara Sherwood Lollar;Georges Lacrampe-Couloume

  • Radiolytic H2 in continental crust: Nuclear power for deep subsurface microbial communities

    Li-Hung Lin;Li-Hung Lin;James Hall;James Hall;Johanna Lippmann-Pipke;Julie A. Ward

  • Nonequilibrium clumped isotope signals in microbial methane

    David T. Wang;David T. Wang;Danielle S. Gruen;Danielle S. Gruen;Barbara Sherwood Lollar;Kai-Uwe Hinrichs

  • Variability in carbon isotopic fractionation during biodegradation of chlorinated ethenes: implications for field applications.

    Gregory F. Slater;Barbara Sherwood Lollar;Brent E. Sleep;Elizabeth A. Edwards

  • Regional groundwater focusing of nitrogen and noble gases into the Hugoton-Panhandle giant gas field, USA

    Chris J. Ballentine;Barbara Sherwood Lollar

  • An oligotrophic deep-subsurface community dependent on syntrophy is dominated by sulfur-driven autotrophic denitrifiers

    Maggie C. Y. Lau;Thomas L. Kieft;Olukayode Kuloyo;Borja Linage-Alvarez

  • Desulfotomaculum and Methanobacterium spp. Dominate a 4- to 5-Kilometer-Deep Fault

    Duane P. Moser;Thomas M. Gihring;Fred J. Brockman;James K. Fredrickson

  • Ammonium stability and nitrogen isotope fractionations for NH4+–NH3(aq)–NH3(gas) systems at 20–70 °C and pH of 2–13: Applications to habitability and nitrogen cycling in low-temperature hydrothermal systems

    Long Li;Barbara Sherwood Lollar;Hong Li;Ulrich G. Wortmann

  • Headspace analysis: A new application for isotopic characterization of dissolved organic contaminants

    Gregory F. Slater;Helen S. Dempster;Barbara Sherwood Lollar;Jason Ahad

  • Carbon and hydrogen isotopic fractionation during anaerobic biodegradation of benzene.

    Silvia A. Mancini;Ania C. Ulrich;Georges Lacrampe-Couloume;Brent Sleep

  • Tracing Organic Contaminants in Groundwater: A New Methodology Using Compound-Specific Isotopic Analysis

    Helen S. Dempster;Barbara Sherwood Lollar;Stanley Feenstra

  • Abiotic formation of hydrocarbons under hydrothermal conditions: Constraints from chemical and isotope data

    Qi Fu;Barbara Sherwood Lollar;Juske Horita;Georges Lacrampe-Couloume

  • Neon isotopes constrain convection and volatile origin in the Earth's mantle

    Chris J. Ballentine;Bernard Marty;Barbara Sherwood Lollar;Martin Cassidy

  • The influence of carbon source on abiotic organic synthesis and carbon isotope fractionation under hydrothermal conditions

    Thomas M. McCollom;Barbara Sherwood Lollar;Georges Lacrampe-Couloume;Jeffrey S. Seewald

Frequent Co-Authors

Georges Lacrampe-Couloume
Georges Lacrampe-Couloume University of Toronto
Tullis C. Onstott
Tullis C. Onstott Princeton University
Elizabeth A. Edwards
Elizabeth A. Edwards University of Toronto
Thomas L. Kieft
Thomas L. Kieft New Mexico Institute of Mining and Technology
Chris J. Ballentine
Chris J. Ballentine University of Oxford
Martin Elsner
Martin Elsner Technical University of Munich
Brent E. Sleep
Brent E. Sleep University of Toronto
Lisa M. Pratt
Lisa M. Pratt Indiana University
Jon Telling
Jon Telling Newcastle University
Elizabeth J. Phillips
Elizabeth J. Phillips Vanderbilt University Medical Center

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