World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 39 6287 5828 2232 1984 127 4610

Nicolas Cassar publications per year

The chart shows the history of publications by Nicolas Cassar between 1998 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Nicolas Cassar published across 29 years, from 1998 to 2026, averaging 6.8 papers a year. Output peaked at 26 publications in 2021. 16 of the 196 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1998 to 2026. Vertical axis: number of publications, 0 to 26. Peak 26 publications in 2021. 1998: 5 publications 1999: 2 publications 2000: 1 publication 2001: 0 publications 2002: 5 publications 2003: 1 publication 2004: 1 publication 2005: 1 publication 2006: 1 publication 2007: 2 publications 2008: 7 publications 2009: 3 publications 2010: 5 publications 2011: 2 publications 2012: 8 publications 2013: 15 publications 2014: 10 publications 2015: 6 publications 2016: 5 publications 2017: 7 publications 2018: 8 publications 2019: 9 publications 2020: 14 publications 2021: 26 publications 2022: 10 publications 2023: 15 publications 2024: 11 publications 2025: 13 publications 2026: 3 publications
1998 2026

196 publications in total across all disciplines

View publications per year as a table
Nicolas Cassar: publications per year, 1998 to 2026
Year Publications
1998 5
1999 2
2000 1
2001 0
2002 5
2003 1
2004 1
2005 1
2006 1
2007 2
2008 7
2009 3
2010 5
2011 2
2012 8
2013 15
2014 10
2015 6
2016 5
2017 7
2018 8
2019 9
2020 14
2021 26
2022 10
2023 15
2024 11
2025 13
2026 3
Total 196
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Nicolas Cassar 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 Nicolas Cassar 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, 118–127 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: 127 publications — 26th percentile

26% 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
118–127 540 127
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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Nicolas Cassar 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 Nicolas Cassar 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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Research.com Recognitions

  • 2012 - Fellow of Alfred P. Sloan Foundation

Overview

Nicolas Cassar is affiliated with Duke University in the United States and has contributed extensively to the fields of Earth and Planetary Sciences and Environmental Science. Their research predominantly focuses on oceanographic processes, marine ecosystems, and environmental dynamics.

The scientist's main areas of study include:

  • Earth and Planetary Sciences
  • Environmental Science

Within these broad fields, Cassar works across several subfields, such as:

  • Oceanography
  • Ecology
  • Global and Planetary Change
  • Atmospheric Science
  • Environmental Chemistry

The topics addressed in their work emphasize marine environments and atmospheric interactions, comprising:

  • Marine and coastal ecosystems
  • Oceanographic and Atmospheric Processes
  • Marine Biology and Ecology Research
  • Marine and fisheries research
  • Isotope Analysis in Ecology
  • Atmospheric and Environmental Gas Dynamics
  • Methane Hydrates and Related Phenomena

Cassar has published scientific papers in several prominent venues, including:

  • Zenodo (CERN European Organization for Nuclear Research)
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Global Biogeochemical Cycles
  • Elementa Science of the Anthropocene
  • Nature Communications

Some of their recent scientific papers include:

  • Widespread phytoplankton blooms triggered by 2019-2020 Australian wildfires (2021, Nature)
  • Global Estimates of Marine Gross Primary Production Based on Machine Learning Upscaling of Field Observations (2021, Global Biogeochemical Cycles)
  • New insights into the distributions of nitrogen fixation and diazotrophs revealed by high-resolution sensing and sampling methods (2020, The ISME Journal)
  • An operational overview of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Northeast Pacific field deployment (2021, Elementa Science of the Anthropocene)
  • A call for refining the role of humic-like substances in the oceanic iron cycle (2020, Scientific Reports)

Frequent collaborators in their research include:

  • Yajuan Lin
  • Guillaume Bourdin
  • Weiyi Tang
  • Emmanuel Boss
  • Yibin Huang

In 2012, Nicolas Cassar was recognized as a Fellow of the Alfred P. Sloan Foundation.

Best Publications

  • Isotope fractionation and atmospheric oxygen: implications for phanerozoic O(2) evolution

    R. A. Berner;S. T. Petsch;J. A. Lake;D. J. Beerling

  • The Southern Ocean Biological Response to Aeolian Iron Deposition

    Nicolas Cassar;Nicolas Cassar;Nicolas Cassar;Michael L. Bender;Michael L. Bender;Michael L. Bender;Bruce A. Barnett;Bruce A. Barnett;Bruce A. Barnett;Songmiao Fan;Songmiao Fan;Songmiao Fan

  • Widespread phytoplankton blooms triggered by 2019–2020 Australian wildfires

    Weiyi Tang;Weiyi Tang;Joan Llort;Jakob Weis;Jakob Weis;Morgane M. G. Perron

  • Interannual sea-air CO2 flux variability from an observation-driven ocean mixed-layer scheme

    Christian Rödenbeck;Dorothée C.E. Bakker;Nicolas Metzl;Are Olsen;Are Olsen

  • Revisiting the distribution of oceanic N2 fixation and estimating diazotrophic contribution to marine production

    Weiyi Tang;Seaver Wang;Debany Fonseca-Batista;Frank Dehairs

  • Bicarbonate uptake by Southern Ocean phytoplankton

    Nicolas Cassar;Nicolas Cassar;Edward A. Laws;Robert R. Bidigare;Brian N. Popp

  • Iron fertilization enhanced net community production but not downward particle flux during the Southern Ocean iron fertilization experiment LOHAFEX

    Patrick Martin;Michiel Rutgers van der Loeff;Nicolas Cassar;Pieter Vandromme;Pieter Vandromme

  • Net community production and gross primary production rates in the western equatorial Pacific

    Rachel H. R. Stanley;Rachel H. R. Stanley;John B. Kirkpatrick;Nicolas Cassar;Nicolas Cassar;Bruce A. Barnett

  • Atmospheric O2/N2 changes, 1993–2002: Implications for the partitioning of fossil fuel CO2 sequestration

    Michael L. Bender;David T. Ho;Melissa B. Hendricks;Robert Mika

  • Diatom elemental and morphological changes in response to iron limitation: a brief review with potential paleoceanographic applications

    A. Marchetti;N. Cassar

  • 13C discrimination patterns in oceanic phytoplankton: likely influence of CO2 concentrating mechanisms, and implications for palaeoreconstructions

    Edward A Laws;Brian N Popp;Nicolas Cassar;Jamie Tanimoto

  • The influence of iron and light on net community production in the Subantarctic and Polar Frontal Zones

    N. Cassar;N. Cassar;P. J. DiFiore;B. A. Barnett;M. L. Bender

  • NanoSIMS single cell analyses reveal the contrasting nitrogen sources for small phytoplankton

    Hugo Berthelot;Solange Duhamel;Stéphane L’Helguen;Jean-Francois Maguer

  • Dissolved O2/Ar and other methods reveal rapid changes in productivity during a Lagrangian experiment in the Southern Ocean

    Roberta C. Hamme;Nicolas Cassar;Veronica P. Lance;Veronica P. Lance;Robert D. Vaillancourt

  • Marine diatom proteorhodopsins and their potential role in coping with low iron availability.

    Adrian Marchetti;Dylan Catlett;Brian M Hopkinson;Kelsey Ellis

  • The Southern Kalahari: a potential new dust source in the Southern Hemisphere?

    Abinash Bhattachan;Paolo D’Odorico;Matthew C Baddock;Ted M Zobeck

  • Machine Learning Estimates of Global Marine Nitrogen Fixation

    Weiyi Tang;Zuchuan Li;Nicolas Cassar;Nicolas Cassar

  • Export production and its regulating factors in the West Antarctica Peninsula region of the Southern Ocean

    Kuan Huang;Hugh W. Ducklow;Maria Vernet;Nicolas Cassar

  • Towards Quantitative Microbiome Community Profiling Using Internal Standards

    Yajuan Lin;Yajuan Lin;Scott Gifford;Hugh Ducklow;Oscar Schofield

  • Evaluating gas transfer velocity parameterizations using upper ocean radon distributions

    Michael L. Bender;Saul Kinter;Nicolas Cassar;Nicolas Cassar;Rik Wanninkhof

  • Data-Driven Modeling of the Distribution of Diazotrophs in the Global Ocean

    Weiyi Tang;Weiyi Tang;Nicolas Cassar;Nicolas Cassar

  • Carbon isotopic fractionation by the marine diatom Phaeodactylum tricornutum under nutrient- and light-limited growth conditions

    Nicolas Cassar;Edward A. Laws;Brian N. Popp

Frequent Co-Authors

Michael L. Bender
Michael L. Bender Princeton University
Bronte Tilbrook
Bronte Tilbrook CSIRO Marine and Atmospheric Research
Michiel M Rutgers van der Loeff
Michiel M Rutgers van der Loeff Alfred Wegener Institute for Polar and Marine Research
Richard S. Lampitt
Richard S. Lampitt National Oceanography Centre
Lars Stemmann
Lars Stemmann Sorbonne University
Humberto E. González
Humberto E. González Austral University of Chile
Hiram Levy
Hiram Levy Geophysical Fluid Dynamics Laboratory
Francesco Cinelli
Francesco Cinelli University of Pisa
Edward A. Laws
Edward A. Laws Louisiana State University
Brian N. Popp
Brian N. Popp University of Hawaii at Manoa

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Related Online Degrees & Career Pathways

For those interested in expanding their expertise alongside Earth Science, pursuing related online degrees can open diverse career pathways. For example, creative professionals might explore affordable options by checking out mfa online programs, which offer flexible study plans that blend artistic skills with environmental themes.

Additionally, management roles within environmental organizations often require strong leadership capabilities. An online masters degree in human resource management helps develop essential skills in team coordination and organizational development, which are valuable when managing multidisciplinary Earth Science teams.

Many Earth Science learners and professionals are lifelong learners, including seniors seeking to enhance their knowledge or pivot careers. The growing availability of online degrees for seniors makes continuing education accessible without disrupting personal commitments.

Lastly, professionals interested in integrating information science with Earth Science research may consider programs from ala-accredited schools. These courses provide skills in data management and archiving, essential for handling large environmental datasets.

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