2026 Toshinobu Machida: Environmental Sciences Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Environmental Sciences	60	2892	2763	37	35	298	14867

Overview

Toshinobu Machida is affiliated with the National Institute for Environmental Studies in Japan. Their research spans several interconnected domains within Earth and Environmental Sciences, with notable contributions in Atmospheric Science, Global and Planetary Change, and Environmental Chemistry. Their work primarily intersects topics such as Atmospheric and Environmental Gas Dynamics, Atmospheric chemistry and aerosols, and Atmospheric Ozone and Climate.

Their publication record includes numerous articles featured in prominent journals, reflecting ongoing engagement with current scientific dialogues. Frequent publication venues include:

Atmospheric chemistry and physics
Journal of Geophysical Research Atmospheres
Progress in Earth and Planetary Science
Scientific Reports
Polar Science

Machida has collaborated extensively with several researchers, particularly with:

Prabir K. Patra (16 joint publications)
Motoki Sasakawa (11 joint publications)
Yosuke Niwa (10 joint publications)
Yasunori Tohjima (9 joint publications)
Hiroshi Tanimoto (8 joint publications)

Selected recent papers authored or co-authored by Toshinobu Machida include:

"The Global Methane Budget 2000-2017" (2020), published in NOAA Institutional Repository
"Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO ₂ seasonal amplification" (2020), published in Proceedings of the National Academy of Sciences
"Technical note: A high-resolution inverse modelling technique for estimating surface CO ₂ fluxes based on the NIES-TM-FLEXPART coupled transport model and its adjoint" (2021), published in Atmospheric chemistry and physics
"Detection of fossil-fuel CO2 plummet in China due to COVID-19 by observation at Hateruma" (2020), published in Scientific Reports
"Statistical characterization of urban CO2 emission signals observed by commercial airliner measurements" (2020), published in Scientific Reports

Their research focuses on understanding atmospheric phenomena, with particular attention to greenhouse gas dynamics, emission patterns, and climate-related atmospheric processes. The scientist's work addresses environmental challenges by quantifying sources and sinks of gases such as methane and carbon dioxide in various ecosystems, including urban and Siberian regions.

Machida's contributions to atmospheric modeling involve advanced inverse modeling techniques designed to improve the estimation of surface CO ₂ fluxes. These techniques support more accurate tracking of anthropogenic and natural emissions over time, which is crucial for climate change research.

Throughout their career, the scientist has concentrated on topics including:

Atmospheric and Environmental Gas Dynamics
Atmospheric chemistry and aerosols
Atmospheric Ozone and Climate
Climate variability and models
Climate change and permafrost
Meteorological Phenomena and Simulations
Methane Hydrates and Related Phenomena

Best Publications

The global methane budget 2000–2017

Marielle Saunois;Ann R. Stavert;Ben Poulter;Philippe Bousquet

3060
Citations
The global methane budget 2000–2012

Marielle Saunois;Philippe Bousquet;Ben Poulter;Anna Peregon

1161
Citations
Weak northern and strong tropical land carbon uptake from vertical profiles of atmospheric CO2

Britton B. Stephens;Kevin R. Gurney;Pieter P. Tans;Colm Sweeney

935
Citations
Calibration of the Total Carbon Column Observing Network using aircraft profile data

Debra Wunch;Geoffrey C. Toon;Paul O. Wennberg;Steven C. Wofsy

518
Citations
CO2 surface fluxes at grid point scale estimated from a global 21 year reanalysis of atmospheric measurements

F. Chevallier;P. Ciais;T. J. Conway;T. Aalto

470
Citations
Worldwide Measurements of Atmospheric CO2 and Other Trace Gas Species Using Commercial Airlines

T. Machida;H. Matsueda;Y. Sawa;Y. Nakagawa

335
Citations
Increase in the atmospheric nitrous oxide concentration during the last 250 years

T. Machida;T. Nakazawa;Y. Fujii;S. Aoki

239
Citations
First year of upper tropospheric integrated content of CO 2 from IASI hyperspectral infrared observations

C. Crevoisier;A. Chédin;H. Matsueda;T. Machida

213
Citations
A strong source of methyl chloride to the atmosphere from tropical coastal land.

Y. Yokouchi;Y. Noijiri;L. A. Barrie;D. Toom-Sauntry

200
Citations
Regional methane emission from West Siberia mire landscapes

M. Glagolev;M. Glagolev;I. Kleptsova;I. Filippov;S. Maksyutov

165
Citations
Continuous measurements of methane from a tower network over Siberia

M. Sasakawa;K. Shimoyama;T. Machida;N. Tsuda

155
Citations
Top–down assessment of the Asian carbon budget since the mid 1990s

Rona Louise Thompson;P.K. Patra;F Chevallier;S. Maksyutov

150
Citations
Rapamycin causes upregulation of autophagy and impairs islets function both in vitro and in vivo.

M. Tanemura;Y. Ohmura;T. Deguchi;T. Machida

145
Citations
Isoprene in the marine boundary layer (southeast Asian Sea, eastern Indian Ocean, and Southern Ocean): Comparison with dimethyl sulfide and bromoform

Yoko Yokouchi;Hong Jun Li;Hong Jun Li;Toshinobu Machida;Shuji Aoki

142
Citations
Variability and quasi-decadal changes in the methane budget over the period 2000-2012

Marielle Saunois;Philippe Bousquet;Ben Poulter;Anna Peregon

139
Citations
Modeling global atmospheric CO 2 with improved emission inventories and CO 2 production from the oxidation of other carbon species

R. Nassar;R. Nassar;D. B. A. Jones;P. Suntharalingam;J. M. Chen

128
Citations
Characterization of Tropospheric Emission Spectrometer (TES) CO 2 for carbon cycle science

S. S. Kulawik;D. B. A. Jones;R. Nassar;F. W. Irion

124
Citations
Global and regional emissions estimates for N 2 O

E. Saikawa;E. Saikawa;R. G. Prinn;E. Dlugokencky;K. Ishijima

123
Citations
A comprehensive estimate of recent carbon sinks in China using both top-down and bottom-up approaches

Fei Jiang;Jing M Chen;Jing M Chen;Lingxi Zhou;Weimin Ju

120
Citations
Combined transplantation of pancreatic islets and adipose tissue-derived stem cells enhances the survival and insulin function of islet grafts in diabetic mice.

Yoshiaki Ohmura;Masahiro Tanemura;Naomasa Kawaguchi;Tomohiko Machida

118
Citations
Aircraft measurements of the concentrations of CO2, CH4, N2O, and CO and the carbon and oxygen isotopic ratios of CO2 in the troposphere over Russia

Takakiyo Nakazawa;Satoshi Sugawara;Gen Inoue;Toshinobu Machida

115
Citations
Global Methane Budget 2000-2012

M. Saunois;P. Bousquet;B. Poulter;A. Peregon

1
Citations

Frequent Co-Authors

Hidekazu Matsueda Japan Meteorological Agency

Shamil Maksyutov National Institute for Environmental Studies

Prabir K. Patra Japan Agency for Marine-Earth Science and Technology

Shuji Aoki Tohoku University

Takakiyo Nakazawa Tohoku University

Hitoshi Mukai National Institute for Environmental Studies

Akihiko Ito University of Tokyo

Isamu Morino National Institute for Environmental Studies

Edward J. Dlugokencky National Oceanic and Atmospheric Administration

Colm Sweeney National Oceanic and Atmospheric Administration

External Links

Personal website of Toshinobu Machida

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