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" (870,057 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
Bird Michael I
environmental change
stable isotopes
radiocarbon
geoarchaeology
biochar
Metrics
H-Index
i10 Index
Citation
90
259
29,705
* Rankings
Ranking Based On Selection: 3
Jon Brodie
Environmental science
environmental management
coral reefs
Metrics
H-Index
i10 Index
Citation
66
206
15,791
* Rankings
Ranking Based On Selection: 4
Georgina Gurney
environmental social science
conservation equity
OECMs
conservation governance
Metrics
H-Index
i10 Index
Citation
42
73
5,411
* Rankings
Ranking Based On Selection: 5
Catherine Collier
Seagrass
Great Barrier Reef
Water quality
SAV
Climate change
Metrics
H-Index
i10 Index
Citation
39
72
5,630
* Rankings
Ranking Based On Selection: 6
Marcus B Lane
environmental management and governance
envrionmental and regional planning
geography
Indigenous peoples
environment and dev
Metrics
H-Index
i10 Index
Citation
36
66
4,997
* Rankings
Ranking Based On Selection: 7
Nathan Waltham
Marine science
floodplain
blue carbon
urban ecology
conservation
Metrics
H-Index
i10 Index
Citation
34
74
3,582
Michele L Barnes
sustainability
social networks
social-ecological systems
climate change
climate adaptation
Metrics
H-Index
i10 Index
Citation
32
44
6,916
* Rankings
Ranking Based On Selection: 10
Helen J Boon
Ethics
climate change
sustainability
disasters
resilience
Metrics
H-Index
i10 Index
Citation
31
56
3,576

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
Vanessa Messmer
Coral reef fish
ecology
climate change
crown-of-thorns starfish
Metrics
H-Index
i10 Index
Citation
27
36
2,568
* Rankings
Ranking Based On Selection: 16
Meryl Pearce Churchill|Meryl Churchill, M W Pearce, Meryl Churchill Pearce
continuing professional development
student employability
social determinants of health
climate change and health and wellbei
Metrics
H-Index
i10 Index
Citation
15
22
618
* Rankings
Ranking Based On Selection: 17
Milena Kiatkoski Kim
Environmental Policy
Environmental Governance
Indigenous Natural Resource Management
Metrics
H-Index
i10 Index
Citation
14
15
549
* Rankings
Ranking Based On Selection: 20
Sharon Harwood
community planning
place based planning
remote community planning
Metrics
H-Index
i10 Index
Citation
10
10
459
Mahsa Amir Abdollahian
Water Resources Management
Hydraulic Engineering
Environmental Engineering
Optimization techniques
Artificial Intelligence
Metrics
H-Index
i10 Index
Citation
7
5
156
Sonia Leonard
Climate Change
Fluvial Geomorphology
Land Governance
Customary Tenure
International Development
Metrics
H-Index
i10 Index
Citation
6
6
774
Rankings
Ranking Based On Selection: 1
Bird Michael I
Metrics
H-Index
i10 Index
Citation Counts
90
259
29,705
environmental change
stable isotopes
radiocarbon
geoarchaeology
biochar
Rankings
Ranking Based On Selection: 2
Helene Marsh
Metrics
H-Index
i10 Index
Citation Counts
77
248
20,124
Rankings
Ranking Based On Selection: 3
Jon Brodie
Metrics
H-Index
i10 Index
Citation Counts
66
206
15,791
Rankings
Ranking Based On Selection: 4
Georgina Gurney
Metrics
H-Index
i10 Index
Citation Counts
42
73
5,411
environmental social science
conservation equity
OECMs
conservation governance
Rankings
Ranking Based On Selection: 5
Catherine Collier
Metrics
H-Index
i10 Index
Citation Counts
39
72
5,630
Seagrass
Great Barrier Reef
Water quality
SAV
Climate change
Rankings
Ranking Based On Selection: 6
Marcus B Lane
Metrics
H-Index
i10 Index
Citation Counts
36
66
4,997
environmental management and governance
envrionmental and regional planning
geography
Indigenous peoples
environment and dev
Rankings
Ranking Based On Selection: 7
Nathan Waltham
Metrics
H-Index
i10 Index
Citation Counts
34
74
3,582
Marine science
floodplain
blue carbon
urban ecology
conservation
Rankings
Ranking Based On Selection: 8
Christopher Wurster
Metrics
H-Index
i10 Index
Citation Counts
33
56
3,872
Rankings
Ranking Based On Selection: 9
Michele L Barnes
Metrics
H-Index
i10 Index
Citation Counts
32
44
6,916
sustainability
social networks
social-ecological systems
climate change
climate adaptation
Rankings
Ranking Based On Selection: 10
Helen J Boon
Metrics
H-Index
i10 Index
Citation Counts
31
56
3,576

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
Vanessa Messmer
Metrics
H-Index
i10 Index
Citation Counts
27
36
2,568
Coral reef fish
ecology
climate change
crown-of-thorns starfish
Rankings
Ranking Based On Selection: 12
Zoe Bainbridge
Metrics
H-Index
i10 Index
Citation Counts
27
48
3,796
Rankings
Ranking Based On Selection: 13
Wade Sinclair
Metrics
H-Index
i10 Index
Citation Counts
21
38
1,336
Rankings
Ranking Based On Selection: 14
Felipe Gusmão
Metrics
H-Index
i10 Index
Citation Counts
15
19
1,622
Rankings
Ranking Based On Selection: 15
Emma Gyuris
Metrics
H-Index
i10 Index
Citation Counts
15
18
1,285
Rankings
Ranking Based On Selection: 16
continuing professional development
student employability
social determinants of health
climate change and health and wellbei
Rankings
Ranking Based On Selection: 17
Milena Kiatkoski Kim
Metrics
H-Index
i10 Index
Citation Counts
14
15
549
Environmental Policy
Environmental Governance
Indigenous Natural Resource Management
Rankings
Ranking Based On Selection: 18
Michael D Jarrold
Metrics
H-Index
i10 Index
Citation Counts
12
12
567
Rankings
Ranking Based On Selection: 19
Mahmoud Ibrahim Mahmoud
Metrics
H-Index
i10 Index
Citation Counts
10
11
2,484
Rankings
Ranking Based On Selection: 20
Sharon Harwood
Metrics
H-Index
i10 Index
Citation Counts
10
10
459
community planning
place based planning
remote community planning
Rankings
Ranking Based On Selection: 21
Yvette Williams
Metrics
H-Index
i10 Index
Citation Counts
9
9
636
Rankings
Ranking Based On Selection: 23
Mahsa Amir Abdollahian
Metrics
H-Index
i10 Index
Citation Counts
7
5
156
Water Resources Management
Hydraulic Engineering
Environmental Engineering
Optimization techniques
Artificial Intelligence
Rankings
Ranking Based On Selection: 24
Sonia Leonard
Metrics
H-Index
i10 Index
Citation Counts
6
6
774
Climate Change
Fluvial Geomorphology
Land Governance
Customary Tenure
International Development
Rankings
Ranking Based On Selection: 25
Monica Gratani
Metrics
H-Index
i10 Index
Citation Counts
6
5
395
Rankings
Ranking Based On Selection: 26
Hamed K Esfahani
Metrics
H-Index
i10 Index
Citation Counts
6
5
102
Rankings
Ranking Based On Selection: 27
Paula Cartwright
Metrics
H-Index
i10 Index
Citation Counts
4
3
69
Rankings
Ranking Based On Selection: 28
James Milner
Metrics
H-Index
i10 Index
Citation Counts
2
1
19