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
Caroline A Sullivan
Ecological economics
environmental managment
water poverty
ecosystem services
climate vulnerability
Metrics
H-Index
i10 Index
Citation
37
72
25,208
* Rankings
Ranking Based On Selection: 2
Malcolm Clark
Geochemistry
waste-material utilisation
acid mine drainage
trace metals
Metrics
H-Index
i10 Index
Citation
35
72
3,738
* Rankings
Ranking Based On Selection: 3
Amy Cutter-Mackenzie-Knowles
Climate Change Education
Environmental Education
Childhood Studies
Posthuman
Metrics
H-Index
i10 Index
Citation
32
68
4,429
John Charles Ryan
Cultural Studies
Literary Studies
Environmental Studies
Creative Writing
Digital Art
Metrics
H-Index
i10 Index
Citation
17
41
1,683
Nicholas J Ward
Environmental analysis
Acid sulfate soil analysis
Acid sulfate soil assessment
Water quality
Sulfide oxidation
Metrics
H-Index
i10 Index
Citation
14
19
697
Praktan Wadnerkar
Environmental scientist
Water quality
Bio-geochemistry
Waterways expert
Water utility
Metrics
H-Index
i10 Index
Citation
10
11
302
Rankings
Ranking Based On Selection: 1
Caroline A Sullivan
Metrics
H-Index
i10 Index
Citation Counts
37
72
25,208
Ecological economics
environmental managment
water poverty
ecosystem services
climate vulnerability
Rankings
Ranking Based On Selection: 2
Malcolm Clark
Metrics
H-Index
i10 Index
Citation Counts
35
72
3,738
Geochemistry
waste-material utilisation
acid mine drainage
trace metals
Rankings
Ranking Based On Selection: 3
Amy Cutter-Mackenzie-Knowles
Metrics
H-Index
i10 Index
Citation Counts
32
68
4,429
Climate Change Education
Environmental Education
Childhood Studies
Posthuman
Rankings
Ranking Based On Selection: 4
Lachlan H Yee
Metrics
H-Index
i10 Index
Citation Counts
23
31
1,471
Rankings
Ranking Based On Selection: 5
John Charles Ryan
Metrics
H-Index
i10 Index
Citation Counts
17
41
1,683
Cultural Studies
Literary Studies
Environmental Studies
Creative Writing
Digital Art
Rankings
Ranking Based On Selection: 6
Steve Dalton
Metrics
H-Index
i10 Index
Citation Counts
17
22
4,368
Rankings
Ranking Based On Selection: 7
Nicholas J Ward
Metrics
H-Index
i10 Index
Citation Counts
14
19
697
Environmental analysis
Acid sulfate soil analysis
Acid sulfate soil assessment
Water quality
Sulfide oxidation
Rankings
Ranking Based On Selection: 8
Praktan Wadnerkar
Metrics
H-Index
i10 Index
Citation Counts
10
11
302
Environmental scientist
Water quality
Bio-geochemistry
Waterways expert
Water utility
Rankings
Ranking Based On Selection: 9
Mohammad Rastegari
Metrics
H-Index
i10 Index
Citation Counts
7
5
124
Rankings
Ranking Based On Selection: 10
Sedigheh Mohamadi|Sady Mohamadi, Sedigheh Mohammadi
Metrics
H-Index
i10 Index
Citation Counts
5
3
96
soil remediation
environmental geochemistry
metal speciation