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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 60 2895 2766 37 35 298 14867

Toshinobu Machida publications per year

The chart shows the history of publications by Toshinobu Machida between 1992 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Toshinobu Machida published across 34 years, from 1992 to 2025, averaging 10.4 papers a year. Output peaked at 30 publications in 2016. 25 of the 354 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1992 to 2025. Vertical axis: number of publications, 0 to 30. Peak 30 publications in 2016. 1992: 2 publications 1993: 2 publications 1994: 1 publication 1995: 3 publications 1996: 2 publications 1997: 3 publications 1998: 0 publications 1999: 2 publications 2000: 5 publications 2001: 1 publication 2002: 5 publications 2003: 16 publications 2004: 6 publications 2005: 4 publications 2006: 8 publications 2007: 5 publications 2008: 16 publications 2009: 18 publications 2010: 19 publications 2011: 18 publications 2012: 17 publications 2013: 13 publications 2014: 16 publications 2015: 20 publications 2016: 30 publications 2017: 25 publications 2018: 17 publications 2019: 17 publications 2020: 18 publications 2021: 7 publications 2022: 3 publications 2023: 10 publications 2024: 12 publications 2025: 13 publications
1992 2025

354 publications in total across all disciplines

View publications per year as a table
Toshinobu Machida: publications per year, 1992 to 2025
Year Publications
1992 2
1993 2
1994 1
1995 3
1996 2
1997 3
1998 0
1999 2
2000 5
2001 1
2002 5
2003 16
2004 6
2005 4
2006 8
2007 5
2008 16
2009 18
2010 19
2011 18
2012 17
2013 13
2014 16
2015 20
2016 30
2017 25
2018 17
2019 17
2020 18
2021 7
2022 3
2023 10
2024 12
2025 13
Total 354
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Toshinobu Machida 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 Toshinobu Machida sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 291–300 publications, is where this scientist sits. 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: 282 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: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 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 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 298 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127 298
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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Toshinobu Machida 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 Toshinobu Machida sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 60 D-Index, is where this scientist sits. 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: 198 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: 20 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: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 60 D-Index — 71st percentile

71% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166 60
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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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

  • The global methane budget 2000–2012

    Marielle Saunois;Philippe Bousquet;Ben Poulter;Anna Peregon

  • 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

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

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

  • 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

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

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

  • Increase in the atmospheric nitrous oxide concentration during the last 250 years

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

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

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

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

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

  • Regional methane emission from West Siberia mire landscapes

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

  • Continuous measurements of methane from a tower network over Siberia

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

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

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

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

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

  • 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

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

    Marielle Saunois;Philippe Bousquet;Ben Poulter;Anna Peregon

  • 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

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

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

  • Global and regional emissions estimates for N 2 O

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

  • 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

  • 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

  • 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

  • Global Methane Budget 2000-2012

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

Frequent Co-Authors

Hidekazu Matsueda
Hidekazu Matsueda Japan Meteorological Agency
Shamil Maksyutov
Shamil Maksyutov National Institute for Environmental Studies
Prabir K. Patra
Prabir K. Patra Japan Agency for Marine-Earth Science and Technology
Shuji Aoki
Shuji Aoki Tohoku University
Takakiyo Nakazawa
Takakiyo Nakazawa Tohoku University
Hitoshi Mukai
Hitoshi Mukai National Institute for Environmental Studies
Akihiko Ito
Akihiko Ito University of Tokyo
Isamu Morino
Isamu Morino National Institute for Environmental Studies
Edward J. Dlugokencky
Edward J. Dlugokencky National Oceanic and Atmospheric Administration
Colm Sweeney
Colm Sweeney National Oceanic and Atmospheric Administration

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