World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
53
Citations
13907
World Ranking
4170
National Ranking
62

Toshimasa Ohara 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 Toshimasa Ohara 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: 212 publications — 68th percentile

68% of scientists in this discipline score the same or lower.

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

Toshimasa Ohara 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 Toshimasa Ohara 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: 53 D-Index — 57th percentile

57% of scientists in this discipline score the same or lower.

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

Overview

Toshimasa Ohara is affiliated with the National Institute for Environmental Studies in Japan. Their research primarily focuses on environmental science and earth and planetary sciences, with an emphasis on atmospheric processes and environmental change.

Their main fields of study include:

  • Environmental Science
  • Earth and Planetary Sciences

Subfields of their work cover:

  • Global and Planetary Change
  • Atmospheric Science
  • Health, Toxicology and Mutagenesis
  • Radiological and Ultrasound Technology
  • Automotive Engineering

The scientist's research topics encompass:

  • Atmospheric chemistry and aerosols
  • Air Quality and Health Impacts
  • Radioactive contamination and transfer
  • Atmospheric and Environmental Gas Dynamics
  • Radioactivity and Radon Measurements
  • Atmospheric Ozone and Climate
  • Atmospheric aerosols and clouds

Toshimasa Ohara's recent publications include the following:

  • "Long-term historical trends in air pollutant emissions in Asia: Regional Emission inventory in ASia (REAS) version 3" (2020), published in Atmospheric chemistry and physics
  • "Focus on land use cover changes and environmental impacts in South/Southeast Asia" (2020), published in Environmental Research Letters
  • "A development of reduction scenarios of the short-lived climate pollutants (SLCPs) for mitigating global warming and environmental problems" (2020), published in Progress in Earth and Planetary Science
  • "Reassessment of early 131I inhalation doses by the Fukushima nuclear accident based on atmospheric 137Cs and 131I/137Cs observation data and multi-ensemble of atmospheric transport and deposition models" (2020), published in Journal of Environmental Radioactivity
  • "Application of linear minimum variance estimation to the multi-model ensemble of atmospheric radioactive Cs-137 with observations" (2020), published in Atmospheric chemistry and physics

Frequent coauthors collaborating with Toshimasa Ohara include:

  • Teruyuki Nakajima
  • Haruo Tsuruta
  • Y. Oura
  • Junichi Kurokawa
  • Krishna Prasad Vadrevu

Their work has been published in several prominent academic venues, such as:

  • Atmospheric chemistry and physics
  • Environmental Pollution
  • Environmental Research Letters
  • Progress in Earth and Planetary Science
  • Journal of Environmental Radioactivity

Best Publications

  • An Asian emission inventory of anthropogenic emission sources for the period 1980-2020

    T. Ohara;T. Ohara;H. Akimoto;J. Kurokawa;N. Horii

  • MIX: a mosaic Asian anthropogenic emission inventory under the international collaboration framework of the MICS-Asia and HTAP

    Meng Li;Qiang Zhang;Jun-ichi Kurokawa;Jung-Hun Woo

  • Emissions of air pollutants and greenhouse gases over Asian regions during 2000–2008: Regional Emission inventory in ASia (REAS) version 2

    J. Kurokawa;T. Ohara;T. Morikawa;S. Hanayama

  • Evolution of anthropogenic and biomass burning emissions of air pollutants at global and regional scales during the 1980–2010 period

    Claire Granier;Bertrand Bessagnet;Tami Bond;Ariela D'Angiola

  • Atmospheric behavior, deposition, and budget of radioactive materials from the Fukushima Daiichi nuclear power plant in March 2011

    Yu Morino;Toshimasa Ohara;Masato Nishizawa

  • Long-term historical trends in air pollutant emissions in Asia: Regional Emission inventory in ASia (REAS) version 3

    Junichi Kurokawa;Toshimasa Ohara

  • Estimation of nitrous oxide, nitric oxide and ammonia emissions from croplands in East, Southeast and South Asia

    Xiaoyuan Yan;Hajime Akimoto;Toshimasa Ohara

  • Bottom-up estimate of biomass burning in mainland China.

    Xiaoyuan Yan;Xiaoyuan Yan;Toshimasa Ohara;Hajime Akimoto

  • Verification of energy consumption in China during 1996–2003 by using satellite observational data

    Hajime Akimoto;Toshimasa Ohara;Toshimasa Ohara;Jun ichi Kurokawa;Nobuhiro Horii

  • Key chemical NOx sink uncertainties and how they influence top-down emissions of nitrogen oxides

    T. Stavrakou;J.-F. Müller;K. F. Boersma;K. F. Boersma

  • Development of region-specific emission factors and estimation of methane emission from rice fields in the East, Southeast and South Asian countries

    Xiaoyuan Yan;Toshimasa Ohara;Hajime Akimoto

  • Methane emission from rice fields in mainland China: Amount and seasonal and spatial distribution

    Xiaoyuan Yan;Zucong Cai;Toshimasa Ohara;Hajime Akimoto

  • Episode Analysis of Deposition of Radiocesium from the Fukushima Daiichi Nuclear Power Plant Accident

    Yu Morino;Toshimasa Ohara;Mirai Watanabe;Seiji Hayashi

  • Systematic analysis of interannual and seasonal variations of model-simulated tropospheric NO 2 in Asia and comparison with GOME-satellite data

    I. Uno;Y. He;T. Ohara;K. Yamaji

  • Analysis of the seasonal variation of ozone in the boundary layer in East Asia using the Community Multi-scale Air Quality model: What controls surface ozone levels over Japan?

    Kazuyo Yamaji;Toshimasa Ohara;Toshimasa Ohara;Itsushi Uno;Hiroshi Tanimoto

  • Statistical modeling of global soil NOx emissions

    Xiaoyuan Yan;Toshimasa Ohara;Hajime Akimoto

  • MIX: a mosaic Asian anthropogenic emission inventory for the MICS-Asia and the HTAP projects

    M. Li;Q. Zhang;J. Kurokawa;J. H. Woo

  • First retrieval of hourly atmospheric radionuclides just after the Fukushima accident by analyzing filter-tapes of operational air pollution monitoring stations

    Haruo Tsuruta;Yasuji Oura;Mitsuru Ebihara;Toshimasa Ohara

  • Significant latitudinal gradient in the surface ozone spring maximum over East Asia

    Hiroshi Tanimoto;Yousuke Sawa;Hidekazu Matsueda;Itsushi Uno

  • Significant geographic gradients in particulate sulfate over Japan determined from multiple-site measurements and a chemical transport model: Impacts of transboundary pollution from the Asian continent

    Masahide Aikawa;Toshimasa Ohara;Takatoshi Hiraki;Okihiro Oishi

Frequent Co-Authors

Itsushi Uno
Itsushi Uno Kyushu University
Hajime Akimoto
Hajime Akimoto National Institute for Environmental Studies
Teruyuki Nakajima
Teruyuki Nakajima University of Tokyo
Haruo Tsuruta
Haruo Tsuruta University of Tokyo
Tatsuya Nagashima
Tatsuya Nagashima National Institute for Environmental Studies
Mitsuru Ebihara
Mitsuru Ebihara Tokyo Metropolitan University
Kengo Sudo
Kengo Sudo Nagoya University
Keiya Yumimoto
Keiya Yumimoto Kyushu University
Hitoshi Irie
Hitoshi Irie Chiba University
Xiaoyuan Yan
Xiaoyuan Yan Chinese Academy of Sciences

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