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" (873,690 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
Ajit Sarmah
Bioenergy
Biochar
fate modelling and validation of emerging contaminants in the terrestrial and aquatic ecosystems
exposure modelling and risk assessment of veterinary medicinesFirst interest
Second interest
Metrics
H-Index
i10 Index
Citation
72
152
22,554
* Rankings
Ranking Based On Selection: 4
Vicente A González
Lean construction 4.0
Mixed-Reality
Serious Games
AI
Digital Twinning
Metrics
H-Index
i10 Index
Citation
43
109
6,618
* Rankings
Ranking Based On Selection: 7
Jennifer Salmond
Air pollution meteorology
urban meteorology
geography
urban climate risk
Metrics
H-Index
i10 Index
Citation
38
86
5,946
* Rankings
Ranking Based On Selection: 9
Naresh Singhal
Biological and chemical treatment technologies
contaminated soils remediation
bioremediation
phytoremediation
Metrics
H-Index
i10 Index
Citation
35
66
3,704
* Rankings
Ranking Based On Selection: 10
Andreas Neef
Climate Mobilities
Climate Change Adaptation
Natural Resource Governance
Participatory Research
Metrics
H-Index
i10 Index
Citation
34
97
5,278

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* Rankings
Ranking Based On Selection: 12
Jakobus Ernst Kobus van Zyl
Water distribution systems
leakage
pressure
water demand
modelling
Metrics
H-Index
i10 Index
Citation
30
69
3,691
* Rankings
Ranking Based On Selection: 13
Anthony Fowler
Climate Change
Palaeoclimatology
Dendroclimatology
Hydroclimatology
Tree Rings
Metrics
H-Index
i10 Index
Citation
30
45
3,872
* Rankings
Ranking Based On Selection: 14
Prakash Ranjitkar
Traffic Engineering
Traffic Flow Theory
Intelligent Transportation Systems
Metrics
H-Index
i10 Index
Citation
26
49
2,128
* Rankings
Ranking Based On Selection: 15
Meg Parsons
Climate Change Adaptation
Human Geography
Environmental History
Indigenous Studies
Environmental Justice
Metrics
H-Index
i10 Index
Citation
23
37
2,818
* Rankings
Ranking Based On Selection: 16
Victoria Metcalf
climate change
ocean acidification
marine biology
citizen science
scicomm
Metrics
H-Index
i10 Index
Citation
16
16
1,365
* Rankings
Ranking Based On Selection: 20
Macbeda Michael-Agwuoke
Optimal City and Waste Management
Next Generation City Environment
Resource and Environmental Planning.
Metrics
H-Index
i10 Index
Citation
3
1
29
Nikolai Siimes
more-than-human
economic geography
science and technology studies
agri-food
wine science
Metrics
H-Index
i10 Index
Citation
2
0
16
Rankings
Ranking Based On Selection: 1
Ajit Sarmah
Metrics
H-Index
i10 Index
Citation Counts
72
152
22,554
Bioenergy
Biochar
fate modelling and validation of emerging contaminants in the terrestrial and aquatic ecosystems
exposure modelling and risk assessment of veterinary medicinesFirst interest
Second interest
Rankings
Ranking Based On Selection: 2
Gary Brierley
Metrics
H-Index
i10 Index
Citation Counts
68
192
16,760
Rankings
Ranking Based On Selection: 3
Michael James Salinger
Metrics
H-Index
i10 Index
Citation Counts
51
116
17,468
Rankings
Ranking Based On Selection: 4
Vicente A González
Metrics
H-Index
i10 Index
Citation Counts
43
109
6,618
Lean construction 4.0
Mixed-Reality
Serious Games
AI
Digital Twinning
Rankings
Ranking Based On Selection: 5
Asaad Y Shamseldin
Metrics
H-Index
i10 Index
Citation Counts
43
118
7,579
Rankings
Ranking Based On Selection: 6
Roger Davies
Metrics
H-Index
i10 Index
Citation Counts
41
72
8,708
Rankings
Ranking Based On Selection: 7
Jennifer Salmond
Metrics
H-Index
i10 Index
Citation Counts
38
86
5,946
Air pollution meteorology
urban meteorology
geography
urban climate risk
Rankings
Ranking Based On Selection: 8
Melanie Kah
Metrics
H-Index
i10 Index
Citation Counts
37
60
8,674
Rankings
Ranking Based On Selection: 9
Naresh Singhal
Metrics
H-Index
i10 Index
Citation Counts
35
66
3,704
Biological and chemical treatment technologies
contaminated soils remediation
bioremediation
phytoremediation
Rankings
Ranking Based On Selection: 10
Andreas Neef
Metrics
H-Index
i10 Index
Citation Counts
34
97
5,278
Climate Mobilities
Climate Change Adaptation
Natural Resource Governance
Participatory Research

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
Kim Natasha Dirks
Metrics
H-Index
i10 Index
Citation Counts
31
70
4,507
Rankings
Ranking Based On Selection: 12
Jakobus Ernst Kobus van Zyl
Metrics
H-Index
i10 Index
Citation Counts
30
69
3,691
Water distribution systems
leakage
pressure
water demand
modelling
Rankings
Ranking Based On Selection: 13
Anthony Fowler
Metrics
H-Index
i10 Index
Citation Counts
30
45
3,872
Climate Change
Palaeoclimatology
Dendroclimatology
Hydroclimatology
Tree Rings
Rankings
Ranking Based On Selection: 14
Prakash Ranjitkar
Metrics
H-Index
i10 Index
Citation Counts
26
49
2,128
Traffic Engineering
Traffic Flow Theory
Intelligent Transportation Systems
Rankings
Ranking Based On Selection: 15
Meg Parsons
Metrics
H-Index
i10 Index
Citation Counts
23
37
2,818
Climate Change Adaptation
Human Geography
Environmental History
Indigenous Studies
Environmental Justice
Rankings
Ranking Based On Selection: 16
Victoria Metcalf
Metrics
H-Index
i10 Index
Citation Counts
16
16
1,365
climate change
ocean acidification
marine biology
citizen science
scicomm
Rankings
Ranking Based On Selection: 17
Brenda Flood
Metrics
H-Index
i10 Index
Citation Counts
10
11
215
Rankings
Ranking Based On Selection: 19
Gevargis Muramthookil Thomas
Metrics
H-Index
i10 Index
Citation Counts
5
3
63
Rankings
Ranking Based On Selection: 20
Macbeda Michael-Agwuoke
Metrics
H-Index
i10 Index
Citation Counts
3
1
29
Optimal City and Waste Management
Next Generation City Environment
Resource and Environmental Planning.
Rankings
Ranking Based On Selection: 21
Nikolai Siimes
Metrics
H-Index
i10 Index
Citation Counts
2
0
16
more-than-human
economic geography
science and technology studies
agri-food
wine science