World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

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

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

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring Environmental Sciences in the USA opens doors to a variety of related online degrees that align with global sustainability and conservation goals. For those seeking flexible learning options, some programs rank among the easiest bachelors degree programs, balancing accessibility with essential knowledge in sciences.

Specializations like geology offer critical insights into earth processes and resource management. Students interested can consider a geology online degree, which provides practical skills applicable to environmental assessment and natural disaster mitigation careers.

With the growing importance of spatial data in environmental analysis, pursuing advanced education in Geographic Information Systems is a smart move. Top-tier options include top GIS masters programs, which prepare graduates for roles in urban planning, conservation, and resource management.

For those interested in policy and public administration tied to environmental issues, top online MPA programs offer pathways to leadership roles that influence environmental regulations and sustainable development initiatives.

Best Scientists Citing Toshimasa Ohara

Trending Scientists

Recently Published Articles