World's Best Scientists 2026 revealed!
Shigenobu Takeda

Shigenobu Takeda

D-Index & Metrics

Earth Science

D-Index
39
Citations
8448
World Ranking
6016
National Ranking
162

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.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

This scientist: 109 publications — 14th percentile

14% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 510 publications or more.

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.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

This scientist: 39 D-Index — 23rd percentile

23% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 94 D-Index or more.

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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