World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
49
Citations
15464
World Ranking
5131
National Ranking
214

Mark W. Shephard 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 Mark W. Shephard 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: 145 publications — 39th percentile

39% of scientists in this discipline score the same or lower.

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

Mark W. Shephard 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 Mark W. Shephard 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: 49 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

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

Overview

Mark W. Shephard is affiliated with Environment and Climate Change Canada. Their research mainly focuses on Earth and Planetary Sciences as well as Environmental Science. These broad areas encompass several subfields including Atmospheric Science, Global and Planetary Change, Environmental Engineering, Aerospace Engineering, and Astronomy and Astrophysics.

The scientist's work covers a variety of topics within the atmospheric and environmental domain. Key topics in their research include:

  • Atmospheric chemistry and aerosols
  • Atmospheric and Environmental Gas Dynamics
  • Planetary Science and Exploration
  • Spacecraft Design and Technology
  • Atmospheric Ozone and Climate
  • Air Quality Monitoring and Forecasting
  • Wind and Air Flow Studies

Mark W. Shephard has contributed to numerous publications, with a significant number appearing in venues such as Zenodo (CERN European Organization for Nuclear Research), Atmospheric chemistry and physics, Atmospheric measurement techniques, Environmental Research Letters, and the Journal of Geophysical Research Atmospheres.

Frequent co-authors include:

  • Jason N. S. Cole
  • Howard W. Barker
  • Zhipeng Qu
  • David P. Donovan
  • Karen Cady-Pereira

Their recent noteworthy papers are:

  • "Ammonia measurements from space with the Cross-track Infrared Sounder: characteristics and applications", 2020, Atmospheric chemistry and physics
  • "Inverse modeling of NH3 sources using CrIS remote sensing measurements", 2020, Environmental Research Letters
  • "UK Ammonia Emissions Estimated With Satellite Observations and GEOS-Chem", 2021, Journal of Geophysical Research Atmospheres
  • "10-year satellite-constrained fluxes of ammonia improve performance of chemistry transport models", 2021, Atmospheric chemistry and physics
  • "Atmospheric ammonia variability and link with particulate matter formation: a case study over the Paris area", 2020, Atmospheric chemistry and physics

Best Publications

  • Radiative forcing by long‐lived greenhouse gases: Calculations with the AER radiative transfer models

    Michael J. Iacono;Jennifer S. Delamere;Eli J. Mlawer;Mark W. Shephard

  • Atmospheric radiative transfer modeling: a summary of the AER codes

    Shepard A. Clough;Mark W. Shephard;Eli J. Mlawer;J. S. Delamere

  • The EarthCARE Satellite: The Next Step Forward in Global Measurements of Clouds, Aerosols, Precipitation, and Radiation

    A. J. Illingworth;H. W. Barker;A. Beljaars;Marie Ceccaldi

  • Tropospheric emission spectrometer: retrieval method and error analysis

    K.W. Bowman;C.D. Rodgers;S.S. Kulawik;J. Worden

  • Comparisons of Tropospheric Emission Spectrometer (TES) ozone profiles to ozonesondes: Methods and initial results

    H. M. Worden;J. A. Logan;J. R. Worden;R. Beer

  • Space-based detection of missing sulfur dioxide sources of global air pollution

    Chris A. McLinden;Vitali Fioletov;Mark W. Shephard;Nick Krotkov

  • Predicted errors of tropospheric emission spectrometer nadir retrievals from spectral window selection

    John Worden;Susan S. Kulawik;Mark W. Shephard;Shepard A. Clough

  • Tropospheric Emission Spectrometer observations of the tropospheric HDO/H2O ratio: Estimation approach and characterization

    John Worden;Kevin Bowman;David Noone;Reinhard Beer

  • Satellite monitoring of ammonia: A case study of the San Joaquin Valley

    Lieven Clarisse;Mark W. Shephard;Franck Dentener;Daniel Hurtmans

  • Cross-track Infrared Sounder (CrIS) satellite observations of tropospheric ammonia

    M. W. Shephard;K. E. Cady-Pereira

  • Constraining U.S. ammonia emissions using TES remote sensing observations and the GEOS‐Chem adjoint model

    L. Zhu;D. K. Henze;K. E. Cady-Pereira;M. W. Shephard

  • NH 3 emissions from large point sources derived from CrIS and IASI satellite observations

    Enrico Dammers;Chris A. McLinden;Debora Griffin;Mark W. Shephard

  • TES ammonia retrieval strategy and global observations of the spatial and seasonal variability of ammonia

    M.W Shephard;K.E Cady-Pereira;M. Luo;D.K Henze

  • First satellite observations of lower tropospheric ammonia and methanol

    Reinhard Beer;Mark W. Shephard;Susan S. Kulawik;Shepard A. Clough

  • The QME AERI LBLRTM: A Closure Experiment for Downwelling High Spectral Resolution Infrared Radiance

    David D. Turner;D. C. Tobin;Shepard A. Clough;Patrick D. Brown

  • Comparison of carbon monoxide measurements by TES and MOPITT: Influence of a priori data and instrument characteristics on nadir atmospheric species retrievals

    M. Luo;C. P. Rinsland;C. D. Rodgers;J. A. Logan

  • Performance of the Line-By-Line Radiative Transfer Model (LBLRTM) for temperature, water vapor, and trace gas retrievals: recent updates evaluated with IASI case studies

    M. J. Alvarado;V. H. Payne;E. J. Mlawer;G. Uymin

  • Implementation of cloud retrievals for Tropospheric Emission Spectrometer (TES) atmospheric retrievals: part 1. Description and characterization of errors on trace gas retrievals

    Susan S. Kulawik;John Worden;Annmarie Eldering;Kevin Bowman

  • Forward model and Jacobians for Tropospheric Emission Spectrometer retrievals

    S.A. Clough;M.W. Shephard;J. Worden;P.D. Brown

  • Performance of the line-by-line radiative transfer model (LBLRTM) for temperature and species retrievals: IASI case studies from JAIVEx

    M. W. Shephard;S. A. Clough;V. H. Payne;W. L. Smith;W. L. Smith

  • Ozone-CO correlations determined by the TES satellite instrument in continental outflow regions

    Lin Zhang;Daniel J. Jacob;Kevin W. Bowman;Jennifer A. Logan

  • Satellite monitoring of ammonia: A case study of the

    Lieven Clarisse;Mark W. Shephard;Frank Dentener;Daniel Hurtmans

Frequent Co-Authors

Karen Cady-Pereira
Karen Cady-Pereira Atmospheric and Environmental Research
Shepard A. Clough
Shepard A. Clough Hanscom Air Force Base
Daven K. Henze
Daven K. Henze University of Colorado Boulder
Helen M. Worden
Helen M. Worden National Center for Atmospheric Research
Susan S. Kulawik
Susan S. Kulawik Ames Research Center
Kevin W. Bowman
Kevin W. Bowman California Institute of Technology
Annmarie Eldering
Annmarie Eldering California Institute of Technology
Curtis P. Rinsland
Curtis P. Rinsland Langley Research Center
Lieven Clarisse
Lieven Clarisse Université Libre de Bruxelles
Jesse O. Bash
Jesse O. Bash Environmental Protection Agency

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