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Shigenobu Takeda

Shigenobu Takeda

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 39 6016 5569 162 151 109 8448

Shigenobu Takeda publications per year

The chart shows the history of publications by Shigenobu Takeda between 1990 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Shigenobu Takeda published across 36 years, from 1990 to 2025, averaging 4.1 papers a year. Output peaked at 12 publications in 2009. 7 of the 147 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1990 to 2025. Vertical axis: number of publications, 0 to 12. Peak 12 publications in 2009. 1990: 1 publication 1991: 2 publications 1992: 1 publication 1993: 0 publications 1994: 0 publications 1995: 2 publications 1996: 0 publications 1997: 3 publications 1998: 1 publication 1999: 2 publications 2000: 1 publication 2001: 4 publications 2002: 6 publications 2003: 2 publications 2004: 5 publications 2005: 10 publications 2006: 5 publications 2007: 11 publications 2008: 3 publications 2009: 12 publications 2010: 12 publications 2011: 4 publications 2012: 3 publications 2013: 6 publications 2014: 3 publications 2015: 4 publications 2016: 1 publication 2017: 4 publications 2018: 5 publications 2019: 5 publications 2020: 2 publications 2021: 10 publications 2022: 8 publications 2023: 2 publications 2024: 6 publications 2025: 1 publication
1990 2025

147 publications in total across all disciplines

View publications per year as a table
Shigenobu Takeda: publications per year, 1990 to 2025
Year Publications
1990 1
1991 2
1992 1
1993 0
1994 0
1995 2
1996 0
1997 3
1998 1
1999 2
2000 1
2001 4
2002 6
2003 2
2004 5
2005 10
2006 5
2007 11
2008 3
2009 12
2010 12
2011 4
2012 3
2013 6
2014 3
2015 4
2016 1
2017 4
2018 5
2019 5
2020 2
2021 10
2022 8
2023 2
2024 6
2025 1
Total 147
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Shigenobu Takeda publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Shigenobu Takeda sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 108–117 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 109 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484 109
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Shigenobu Takeda D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Shigenobu Takeda sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 39 D-Index — 35th percentile

35% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349 39
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Shigenobu Takeda is affiliated with Nagasaki University in Japan and has contributed extensively to the fields of Earth and Planetary Sciences and Environmental Science. The primary focus of their research lies within the subfields of Oceanography, Ecology, Health, Toxicology and Mutagenesis, Atmospheric Science, and Environmental Chemistry.

The main topics covered in their work include:

  • Marine and coastal ecosystems
  • Marine Biology and Ecology Research
  • Microbial Community Ecology and Physiology
  • Mercury impact and mitigation studies
  • Oceanographic and Atmospheric Processes
  • Atmospheric chemistry and aerosols
  • Atmospheric and Environmental Gas Dynamics

Takeda has published multiple papers, with notable works including:

  • "Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation," 2020, Proceedings of the National Academy of Sciences
  • "Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific," 2021, Scientific Reports
  • "Phytoplankton Distributions in the Kuroshio-Oyashio Region of the Northwest Pacific Ocean: Implications for Marine Ecology and Carbon Cycle," 2022, Frontiers in Marine Science
  • "Nitrogen burden from atmospheric deposition in East Asian oceans in 2010 based on high-resolution regional numerical modeling," 2021, Environmental Pollution
  • "Photodecomposition of natural organic metal-binding ligands from deep seawater," 2021, Marine Chemistry

The frequent publication venues for their research include Marine Chemistry, Environmental Pollution, Microbiology Spectrum, Estuarine Coastal and Shelf Science, and Journal of Oceanography.

Takeda has collaborated frequently with several researchers, including:

  • M. Sato
  • Hajime Obata
  • Takuhei Shiozaki
  • Ken Furuya
  • Yoshiko Kondo

This body of work contributes to the understanding of marine ecosystem dynamics, biogeochemical cycles, and atmospheric interactions, reflecting a multidisciplinary approach that spans oceanographic and environmental science disciplines. The research outputs also highlight the role of various chemical and biological processes affecting marine environments, which have implications for broader ecological and environmental modeling efforts.

Best Publications

  • Mesoscale iron enrichment experiments 1993-2005 : Synthesis and future directions

    P. W. Boyd;T. Jickells;C. S. Law;S. Blain

  • Influence of iron availability on nutrient consumption ratio of diatoms in oceanic waters

    Shigenobu Takeda

  • A mesoscale iron enrichment in the western subarctic Pacific induces a large centric diatom bloom.

    Atsushi Tsuda;Shigenobu Takeda;Hiroaki Saito;Jun Nishioka

  • The decline and fate of an iron-induced subarctic phytoplankton bloom

    Philip W. Boyd;Cliff S. Law;C.S. Wong;Yukihiro Nojiri

  • Comparison of factors controlling phytoplankton productivity in the NE and NW subarctic Pacific gyres

    P.J. Harrison;P.W. Boyda;D.E. Varela;S. Takeda

  • Iron supply to the western subarctic Pacific: Importance of iron export from the Sea of Okhotsk

    Jun Nishioka;Jun Nishioka;Tsuneo Ono;Hiroaki Saito;Takeshi Nakatsuka

  • Ocean iron fertilization-Moving forward in a sea of uncertainty

    Ken O. Buesseler;Scott C. Doney;David M. Karl;Philip W. Boyd

  • Size-fractionated iron concentrations in the northeast Pacific Ocean : distribution of soluble and small colloidal iron

    J Nishioka;S Takeda;C.S Wong;W.K Johnson

  • Ocean fertilization for geoengineering: A review of effectiveness, environmental impacts and emerging governance

    Phillip Williamson;Douglas W.R. Wallace;Cliff S. Law;Philip W. Boyd

  • The evolution and termination of an iron-induced mesoscale bloom in the northeast subarctic Pacific

    Philip W. Boyd;Robert Strzepek;Shigenobu Takeda;George Jackson

  • Basin scale variability of active diazotrophs and nitrogen fixation in the North Pacific, from the tropics to the subarctic Bering Sea

    Takuhei Shiozaki;Takuhei Shiozaki;Deniz Bombar;Lasse Riemann;Fuminori Hashihama

  • New estimation of N2 fixation in the western and central Pacific Ocean and its marginal seas

    Takuhei Shiozaki;Ken Furuya;Taketoshi Kodama;Satoshi Kitajima

  • Latitudinal distribution of diazotrophs and their nitrogen fixation in the tropical and subtropical western North Pacific

    Satoshi Kitajima;Ken Furuya;Fuminori Hashihama;Shigenobu Takeda

  • Distribution of the cyanobacterium Richelia intracellularis as an epiphyte of the diatom Chaetoceros compressus in the western Pacific Ocean

    Fernando Gómez;Ken Furuya;Shigenobu Takeda

  • Macro-scale exhaustion of surface phosphate by dinitrogen fixation in the western North Pacific

    Fuminori Hashihama;Ken Furuya;Satoshi Kitajima;Shigenobu Takeda

  • Iron regeneration and organic iron(III)-binding ligand production during in situ zooplankton grazing experiment

    Mitsuhide Sato;Shigenobu Takeda;Ken Furuya

  • Evidence for the grazing hypothesis: Grazing reduces phytoplankton responses of the HNLC ecosystem to iron enrichment in the western subarctic pacific (SEEDS II)

    Atsushi Tsuda;Shigenobu Takeda;Hiroaki Saito;Jun Nishioka

  • Heterotrophic bacteria as major nitrogen fixers in the euphotic zone of the Indian Ocean

    Takuhei Shiozaki;Minoru Ijichi;Taketoshi Kodama;Taketoshi Kodama;Shigenobu Takeda

  • Significant portion of dissolved organic Fe complexes in fact is Fe colloids

    Marie Boye;Jun Nishioka;Peter Croot;Patrick Laan

  • Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation.

    Jun Nishioka;Hajime Obata;Hiroshi Ogawa;Kazuya Ono

  • Distributions of particulate and dissolved organic and inorganic phosphorus in North Pacific surface waters

    Takeshi Yoshimura;Jun Nishioka;Hiroaki Saito;Shigenobu Takeda

Frequent Co-Authors

Ken Furuya
Ken Furuya Soka University
Jun Nishioka
Jun Nishioka Hokkaido University
Atsushi Tsuda
Atsushi Tsuda University of Tokyo
Hajime Obata
Hajime Obata University of Tokyo
Hiroaki Saito
Hiroaki Saito University of Tokyo
Philip W. Boyd
Philip W. Boyd University of Tasmania
Yukihiro Nojiri
Yukihiro Nojiri National Institute for Environmental Studies
Peter Croot
Peter Croot University of Galway
Cliff S. Law
Cliff S. Law National Institute of Water and Atmospheric Research
Maurice Levasseur
Maurice Levasseur Université Laval

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