Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (870,053 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Robert J Nicholls
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Metrics
H-Index
i10 Index
Citation
112
411
63,544
* Rankings
Ranking Based On Selection: 4
Thomas Mock
Genomics
Reverse Genetics
Evolution
Phytoplankton
Microbes
Metrics
H-Index
i10 Index
Citation
48
92
13,211
* Rankings
Ranking Based On Selection: 5
Jonathan D Todd
Organosulfur cycling
Environmental microbiology
DMSP
DMS
Marine Microbiology
Metrics
H-Index
i10 Index
Citation
43
76
6,228
Jan Kaiser
Stable Isotope Geochemistry
Marine Biogeochemistry
Atmospheric Chemistry
Metrics
H-Index
i10 Index
Citation
39
79
5,361
Phillip Williamson
marine biogeochemistry
climate change impacts
ocean acidification
blue carbon
Metrics
H-Index
i10 Index
Citation
39
69
7,415
* Rankings
Ranking Based On Selection: 10
Neil Dawson
Environmental justice
wellbeing
conservation governance
climate
agriculture
Metrics
H-Index
i10 Index
Citation
27
38
3,419

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* Rankings
Ranking Based On Selection: 11
Martin Johnson
Marine biogeochemistry
Earth-system Science
Knowledge Exchange
Aquaculture
marine CDR
Metrics
H-Index
i10 Index
Citation
24
37
2,719
* Rankings
Ranking Based On Selection: 12
clive wilkinson
maritime history
navigation
meteorology
oceanography
glaciology
Metrics
H-Index
i10 Index
Citation
19
25
2,277
* Rankings
Ranking Based On Selection: 15
Rebecca M Wright
marine science
climate change
biogeochemistry
plankton ecosystem
gelatinous zooplankton
Metrics
H-Index
i10 Index
Citation
12
12
4,026
James M Booty
marine and terrestrial ecology
ecosystem functioning
ornithology
Metrics
H-Index
i10 Index
Citation
1
1
16
Rankings
Ranking Based On Selection: 1
Robert J Nicholls
Metrics
H-Index
i10 Index
Citation Counts
112
411
63,544
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Rankings
Ranking Based On Selection: 2
Andrew Watkinson
Metrics
H-Index
i10 Index
Citation Counts
87
206
30,098
Rankings
Ranking Based On Selection: 3
Karen J Heywood
Metrics
H-Index
i10 Index
Citation Counts
64
148
12,006
Rankings
Ranking Based On Selection: 4
Thomas Mock
Metrics
H-Index
i10 Index
Citation Counts
48
92
13,211
Genomics
Reverse Genetics
Evolution
Phytoplankton
Microbes
Rankings
Ranking Based On Selection: 5
Jonathan D Todd
Metrics
H-Index
i10 Index
Citation Counts
43
76
6,228
Organosulfur cycling
Environmental microbiology
DMSP
DMS
Marine Microbiology
Rankings
Ranking Based On Selection: 6
Adrian Matthews
Metrics
H-Index
i10 Index
Citation Counts
40
76
6,546
Rankings
Ranking Based On Selection: 7
Carol Robinson
Metrics
H-Index
i10 Index
Citation Counts
40
67
8,157
Rankings
Ranking Based On Selection: 8
Jan Kaiser
Metrics
H-Index
i10 Index
Citation Counts
39
79
5,361
Stable Isotope Geochemistry
Marine Biogeochemistry
Atmospheric Chemistry
Rankings
Ranking Based On Selection: 9
Phillip Williamson
Metrics
H-Index
i10 Index
Citation Counts
39
69
7,415
marine biogeochemistry
climate change impacts
ocean acidification
blue carbon
Rankings
Ranking Based On Selection: 10
Neil Dawson
Metrics
H-Index
i10 Index
Citation Counts
27
38
3,419
Environmental justice
wellbeing
conservation governance
climate
agriculture

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

Rankings
Ranking Based On Selection: 11
Martin Johnson
Metrics
H-Index
i10 Index
Citation Counts
24
37
2,719
Marine biogeochemistry
Earth-system Science
Knowledge Exchange
Aquaculture
marine CDR
Rankings
Ranking Based On Selection: 12
clive wilkinson
Metrics
H-Index
i10 Index
Citation Counts
19
25
2,277
maritime history
navigation
meteorology
oceanography
glaciology
Rankings
Ranking Based On Selection: 13
Nicolas Mayot
Metrics
H-Index
i10 Index
Citation Counts
13
15
6,212
Rankings
Ranking Based On Selection: 14
Gillian Damerell
Metrics
H-Index
i10 Index
Citation Counts
13
13
849
Rankings
Ranking Based On Selection: 15
Rebecca M Wright
Metrics
H-Index
i10 Index
Citation Counts
12
12
4,026
marine science
climate change
biogeochemistry
plankton ecosystem
gelatinous zooplankton
Rankings
Ranking Based On Selection: 16
John Bacon
Metrics
H-Index
i10 Index
Citation Counts
11
13
412
Rankings
Ranking Based On Selection: 17
James M Booty
Metrics
H-Index
i10 Index
Citation Counts
1
1
16
marine and terrestrial ecology
ecosystem functioning
ornithology
Rankings
Ranking Based On Selection: 18
Aparna Ar|Aparna Anitha Reghunathan
Metrics
H-Index
i10 Index
Citation Counts
1
1
12