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" (873,864 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
Megharaj Mallavarapu|Mallavarapu Megharaj
Bioremediation
Ecotoxicology
Environmental Science
Environmental Microbiology
Mixed Contaminants
Metrics
H-Index
i10 Index
Citation
100
481
39,032
Oliver Heidrich
Civil and Environmental Engineering
Climate Change
cities and resource management
Metrics
H-Index
i10 Index
Citation
44
67
12,912
Anthony Stevenson
Mediterranean Palaeoecology
Climate change and its impact in the british uplands and mediterranean region
Metrics
H-Index
i10 Index
Citation
42
72
7,821
* Rankings
Ranking Based On Selection :10
Yanju Liu
Environmental Soil Chemistry
waste utilisation
sorption remediation
Metrics
H-Index
i10 Index
Citation
38
69
5,665
* Rankings
Ranking Based On Selection :12
Russell Davenport
Microbial Ecology
Wastewater Treatment
Biodegradation
Micropollutants
Metrics
H-Index
i10 Index
Citation
36
59
6,017
* Rankings
Ranking Based On Selection :17
Wojciech Mrozik
environmental science
battery safety
battery recycling
environmental and analytical chemistry
environmental risk assesment
Metrics
H-Index
i10 Index
Citation
29
33
3,019
* Rankings
Ranking Based On Selection :20
In Young Yeo
Catchment hydrology
GIS and Remote Sensing
Environmental Planning
Spatial Analysis
Spatial Optimization
Metrics
H-Index
i10 Index
Citation
26
50
2,129
* Rankings
Ranking Based On Selection :21
Phil James
environmental sensing
spatial data
urban systems
digital twins
IoT
Metrics
H-Index
i10 Index
Citation
26
46
2,984
* Rankings
Ranking Based On Selection :22
Rajarathnam D
Analytical Chemistry
Environmental Analysis
Materials Characterization
Metrics
H-Index
i10 Index
Citation
25
47
3,769
* Rankings
Ranking Based On Selection :23
Velasquez Orta
bioelectrochemical systems microagal technology process intensification environmental engineering
Metrics
H-Index
i10 Index
Citation
25
39
2,973
* Rankings
Ranking Based On Selection :25
Kannan Krishnan
Environmental Science
Biomedical
Protein Biophysics
Laser Confocal Microscopy
Metrics
H-Index
i10 Index
Citation
20
32
1,365
* Rankings
Ranking Based On Selection :26
Claire Walsh
Water Security
Blue-Green Infrastructure
Climate change
Adaptation
Integrated Assessment
Metrics
H-Index
i10 Index
Citation
20
31
1,949
* Rankings
Ranking Based On Selection :29
Liam Phelan
sustainability
political economy
climate change
complex adaptive systems
teaching and learning
Metrics
H-Index
i10 Index
Citation
18
23
1,180
* Rankings
Ranking Based On Selection :30
SM Zobaidul Kabir
Environmental impact assessment
renewable energy
climate change
sustainable development
Metrics
H-Index
i10 Index
Citation
17
27
1,131
* Rankings
Ranking Based On Selection :32
Craig Evans
Water quality
environmental monitoring
aquatic ecology
environmental microbiology
Metrics
H-Index
i10 Index
Citation
17
22
2,060
* Rankings
Ranking Based On Selection :33
Phillip M Geary
Small wastewater systems
pollution source tracking
contaminated soil and groundwater
constructed wetlands
Metrics
H-Index
i10 Index
Citation
17
26
1,202
* Rankings
Ranking Based On Selection :37
Burhan Shamurad
Environmental_Engineering_&_Biotechnology
Renewable_Energy
Solid_Waste_Management
Metrics
H-Index
i10 Index
Citation
11
11
350
* Rankings
Ranking Based On Selection :38
Nathan Forsythe
hydrology
water resources
climate change
downscaling
remote sensing
Metrics
H-Index
i10 Index
Citation
11
11
3,168
* Rankings
Ranking Based On Selection :39
Charles CC Lee
environmental remediation
sustainability
ecological rehabilitation
hyperaccummulator plants
Metrics
H-Index
i10 Index
Citation
11
11
612
Xianfeng Liu
Unsaturated soil mechanics
rock mechanics
Geoenvironmental engineering
Metrics
H-Index
i10 Index
Citation
1
1
11
Rankings
Ranking Based On Selection: 1
Megharaj Mallavarapu|Mallavarapu Megharaj
Metrics
H-Index
i10 Index
Citation Counts
100
481
39,032
Bioremediation
Ecotoxicology
Environmental Science
Environmental Microbiology
Mixed Contaminants
Rankings
Ranking Based On Selection: 2
Mohammad Mahmudur Rahman
Metrics
H-Index
i10 Index
Citation Counts
64
177
16,257
Rankings
Ranking Based On Selection: 3
Chris Kilsby
Metrics
H-Index
i10 Index
Citation Counts
55
117
11,535
Rankings
Ranking Based On Selection: 4
Garry Willgoose
Metrics
H-Index
i10 Index
Citation Counts
52
110
9,658
Rankings
Ranking Based On Selection: 5
Rob Upstill Goddard
Metrics
H-Index
i10 Index
Citation Counts
50
77
8,869
Rankings
Ranking Based On Selection: 6
John Bythell
Metrics
H-Index
i10 Index
Citation Counts
46
75
7,790
Rankings
Ranking Based On Selection: 7
Jetse Kalma
Metrics
H-Index
i10 Index
Citation Counts
45
108
8,333
Rankings
Ranking Based On Selection: 8
Oliver Heidrich
Metrics
H-Index
i10 Index
Citation Counts
44
67
12,912
Civil and Environmental Engineering
Climate Change
cities and resource management
Rankings
Ranking Based On Selection: 9
Anthony Stevenson
Metrics
H-Index
i10 Index
Citation Counts
42
72
7,821
Mediterranean Palaeoecology
Climate change and its impact in the british uplands and mediterranean region
Rankings
Ranking Based On Selection: 10
Yanju Liu
Metrics
H-Index
i10 Index
Citation Counts
38
69
5,665
Environmental Soil Chemistry
waste utilisation
sorption remediation
Rankings
Ranking Based On Selection: 11
Timothy Boswell
Metrics
H-Index
i10 Index
Citation Counts
37
63
3,547
Rankings
Ranking Based On Selection: 12
Russell Davenport
Metrics
H-Index
i10 Index
Citation Counts
36
59
6,017
Microbial Ecology
Wastewater Treatment
Biodegradation
Micropollutants
Rankings
Ranking Based On Selection: 13
JINGMING HOU
Metrics
H-Index
i10 Index
Citation Counts
33
88
3,649
Rankings
Ranking Based On Selection: 14
Patricia M Saco
Metrics
H-Index
i10 Index
Citation Counts
33
56
3,635
Rankings
Ranking Based On Selection: 15
Geoff R MacFarlane
Metrics
H-Index
i10 Index
Citation Counts
32
61
4,888
Rankings
Ranking Based On Selection: 16
Jaime Amezaga
Metrics
H-Index
i10 Index
Citation Counts
30
46
3,111
Rankings
Ranking Based On Selection: 17
Wojciech Mrozik
Metrics
H-Index
i10 Index
Citation Counts
29
33
3,019
environmental science
battery safety
battery recycling
environmental and analytical chemistry
environmental risk assesment
Rankings
Ranking Based On Selection: 18
Richard Yu
Metrics
H-Index
i10 Index
Citation Counts
28
48
2,980
Rankings
Ranking Based On Selection: 19
Xanne AK Janse de Jonge
Metrics
H-Index
i10 Index
Citation Counts
27
36
4,976
Rankings
Ranking Based On Selection: 20
In Young Yeo
Metrics
H-Index
i10 Index
Citation Counts
26
50
2,129
Catchment hydrology
GIS and Remote Sensing
Environmental Planning
Spatial Analysis
Spatial Optimization
Rankings
Ranking Based On Selection: 21
Phil James
Metrics
H-Index
i10 Index
Citation Counts
26
46
2,984
environmental sensing
spatial data
urban systems
digital twins
IoT
Rankings
Ranking Based On Selection: 22
Rajarathnam D
Metrics
H-Index
i10 Index
Citation Counts
25
47
3,769
Analytical Chemistry
Environmental Analysis
Materials Characterization
Rankings
Ranking Based On Selection: 23
Velasquez Orta
Metrics
H-Index
i10 Index
Citation Counts
25
39
2,973
bioelectrochemical systems microagal technology process intensification environmental engineering
Rankings
Ranking Based On Selection: 24
Jeremy Franks
Metrics
H-Index
i10 Index
Citation Counts
24
36
2,027
environment schemes
agriculture
food
technology
productivity
Rankings
Ranking Based On Selection: 25
Kannan Krishnan
Metrics
H-Index
i10 Index
Citation Counts
20
32
1,365
Environmental Science
Biomedical
Protein Biophysics
Laser Confocal Microscopy
Rankings
Ranking Based On Selection: 26
Claire Walsh
Metrics
H-Index
i10 Index
Citation Counts
20
31
1,949
Water Security
Blue-Green Infrastructure
Climate change
Adaptation
Integrated Assessment
Rankings
Ranking Based On Selection: 27
Abinandan Sudharsanam
Metrics
H-Index
i10 Index
Citation Counts
19
30
1,583
Rankings
Ranking Based On Selection: 28
Alistair Ford
Metrics
H-Index
i10 Index
Citation Counts
18
23
2,885
Rankings
Ranking Based On Selection: 29
Liam Phelan
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,180
sustainability
political economy
climate change
complex adaptive systems
teaching and learning
Rankings
Ranking Based On Selection: 30
SM Zobaidul Kabir
Metrics
H-Index
i10 Index
Citation Counts
17
27
1,131
Environmental impact assessment
renewable energy
climate change
sustainable development
Rankings
Ranking Based On Selection: 31
Thomas D Linley
Metrics
H-Index
i10 Index
Citation Counts
17
25
1,377
Rankings
Ranking Based On Selection: 32
Craig Evans
Metrics
H-Index
i10 Index
Citation Counts
17
22
2,060
Water quality
environmental monitoring
aquatic ecology
environmental microbiology
Rankings
Ranking Based On Selection: 33
Phillip M Geary
Metrics
H-Index
i10 Index
Citation Counts
17
26
1,202
Small wastewater systems
pollution source tracking
contaminated soil and groundwater
constructed wetlands
Rankings
Ranking Based On Selection: 34
Peter Sanderson
Metrics
H-Index
i10 Index
Citation Counts
16
18
1,082
Rankings
Ranking Based On Selection: 35
Ying CHENG
Metrics
H-Index
i10 Index
Citation Counts
14
16
776
Rankings
Ranking Based On Selection: 36
Josephine Vaughan
Metrics
H-Index
i10 Index
Citation Counts
13
22
596
Rankings
Ranking Based On Selection: 37
Burhan Shamurad
Metrics
H-Index
i10 Index
Citation Counts
11
11
350
Environmental_Engineering_&_Biotechnology
Renewable_Energy
Solid_Waste_Management
Rankings
Ranking Based On Selection: 38
Nathan Forsythe
Metrics
H-Index
i10 Index
Citation Counts
11
11
3,168
hydrology
water resources
climate change
downscaling
remote sensing
Rankings
Ranking Based On Selection: 39
Charles CC Lee
Metrics
H-Index
i10 Index
Citation Counts
11
11
612
environmental remediation
sustainability
ecological rehabilitation
hyperaccummulator plants
Rankings
Ranking Based On Selection: 40
Zephan Chan Yu Yun
Metrics
H-Index
i10 Index
Citation Counts
4
4
1,768
Rankings
Ranking Based On Selection: 41
Andrew Oroke
Metrics
H-Index
i10 Index
Citation Counts
4
3
88
Environmental Engineering
Hydro biogeochemistry
Water quality management
Rankings
Ranking Based On Selection: 42
Katie Robins
Metrics
H-Index
i10 Index
Citation Counts
2
2
32
environmental engineering
epidemiology
environmental epidemiology
Rankings
Ranking Based On Selection: 43
Xianfeng Liu
Metrics
H-Index
i10 Index
Citation Counts
1
1
11
Unsaturated soil mechanics
rock mechanics
Geoenvironmental engineering