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
Andrew C. Johnson
Impact of pollutants on the aquatic environment
Metrics
H-Index
i10 Index
Citation
75
200
18,865
* Rankings
Ranking Based On Selection :2
Ute Skiba
Greenhouse gases
nitrogen
agriculture
nitric oxide
Metrics
H-Index
i10 Index
Citation
73
180
20,309
* Rankings
Ranking Based On Selection :5
Prudhomme
hydrological forecasting
flood
drought
Metrics
H-Index
i10 Index
Citation
61
128
14,247
* Rankings
Ranking Based On Selection :7
Simon Smart
conservation of wild plants
monitoring
plant traits
species niche modelling
Metrics
H-Index
i10 Index
Citation
52
126
10,581
* Rankings
Ranking Based On Selection :8
Mike Bowes
Phosphorus
Eutrophication
Algal Blooms
Rivers
Metrics
H-Index
i10 Index
Citation
48
91
7,646
* Rankings
Ranking Based On Selection :9
Don Monteith
Environmental Change
Acidification
Dissolved Organic Carbon
Metrics
H-Index
i10 Index
Citation
48
94
13,387
* Rankings
Ranking Based On Selection :13
Monika D. Jürgens
water quality
chemical contamination
fish
Metrics
H-Index
i10 Index
Citation
33
44
4,299
* Rankings
Ranking Based On Selection :18
Susan Tandy
soil
metal(loid)s
bioavailability
plants
phosphorus
Metrics
H-Index
i10 Index
Citation
28
46
3,793
* Rankings
Ranking Based On Selection :20
Mhairi Coyle
land-atmosphere exchange
eddy covariance
trace gases
ozone
vegetation
Metrics
H-Index
i10 Index
Citation
27
37
7,344
* Rankings
Ranking Based On Selection :23
Clare Rowland
Remote Sensing
Land Cover Mapping
LCM2015
Metrics
H-Index
i10 Index
Citation
22
44
2,884
* Rankings
Ranking Based On Selection :24
Simon Oakley
Soil
Carbon
Greenhouse Gas
Nitrogen
Metrics
H-Index
i10 Index
Citation
22
25
4,521
* Rankings
Ranking Based On Selection :25
Jan Baas
mixtures
bio diversity
species sensitivity
Metrics
H-Index
i10 Index
Citation
21
28
1,782
* Rankings
Ranking Based On Selection :29
Edward Carnell
Ammonia
Greenhouse gases
Agriculture
Metrics
H-Index
i10 Index
Citation
16
21
914
* Rankings
Ranking Based On Selection :30
Cornelia Klein
land-atmosphere interactions
organised convection
monsoon dynamics
Metrics
H-Index
i10 Index
Citation
16
20
1,121
* Rankings
Ranking Based On Selection :36
Sue Rennie
Environmental data
Long-term environmental research (LTER)
Metrics
H-Index
i10 Index
Citation
11
12
367
* Rankings
Ranking Based On Selection :37
Aneurin W O'Neil
Remote Sensing
GIS
Land Cover Mapping
Metrics
H-Index
i10 Index
Citation
10
11
653
* Rankings
Ranking Based On Selection :39
Faiza Samreen
Distributed Systems
Cloud Computing
Machine Learning
Environmental science
Cloud brokerage
Metrics
H-Index
i10 Index
Citation
10
10
317
* Rankings
Ranking Based On Selection :40
Sam Harrison
exposure modelling
fate modelling
environmental contaminants
environmental modelling
physics
Metrics
H-Index
i10 Index
Citation
9
9
453
Festus Asaaga
Land Tenure
One Health
Knowledge co-production
Social Ecology
Zoonoses
Metrics
H-Index
i10 Index
Citation
9
9
282
Kasia Sawicka
biogeochemical modelling
spatial ecosystem modelling
Metrics
H-Index
i10 Index
Citation
9
8
426
Hollie M Cooper
Environmental monitoring
land surface science
Metrics
H-Index
i10 Index
Citation
9
7
618
Elizabeth S Cooper
hydrological processes
land surface processes
data assimilation
mathematical modelling
Metrics
H-Index
i10 Index
Citation
9
9
360
Adam Griffin
Statistics
Extreme Value Analysis
Hydrology
Probability Theory
Metrics
H-Index
i10 Index
Citation
7
5
154
Joshua Talib
Tropical Meteorology
Land-Atmosphere Interactions
Climate Science
Hydrology
Metrics
H-Index
i10 Index
Citation
7
5
130
Muhammad Afzal
Climate variability
Water resources management
Metrics
H-Index
i10 Index
Citation
7
5
191
Rishma Chengot
Climate change
Hydrology
Water Resources Management
Metrics
H-Index
i10 Index
Citation
7
3
107
Bethan L. Harris
Tropical meteorology
land-atmosphere interactions
Metrics
H-Index
i10 Index
Citation
6
4
75
Laura Bentley
Land management for soil health and carbon sequestration
Metrics
H-Index
i10 Index
Citation
5
5
227
Samuel Jb Robinson
Land use and climate change impacts on biodiversity and ecosystem functions
Metrics
H-Index
i10 Index
Citation
5
4
135
Anita Lazurko
scenarios
transformation
social-ecological systems
resilience
epistemology
Metrics
H-Index
i10 Index
Citation
5
4
94
Guillaume Chagnaud
Land-atmosphere interactions
humid heat waves
climate change
Metrics
H-Index
i10 Index
Citation
5
2
369
Isabelle Fournier
freshwater
phytoplankton
microbial activity
contaminants
chemistry
Metrics
H-Index
i10 Index
Citation
4
4
97
Hermann Kam
Land management
Agri-environmental policy
Rural geography
Metrics
H-Index
i10 Index
Citation
4
3
49
Amy Thorpe
Molecular ecology
Environmental DNA
Ancient DNA
Microbial ecology
Metrics
H-Index
i10 Index
Citation
4
2
39
Holly Tipper
antimicrobial resistance
AMR
environmental pollution
freshwater pollution
Metrics
H-Index
i10 Index
Citation
2
2
52
Rankings
Ranking Based On Selection: 1
Andrew C. Johnson
Metrics
H-Index
i10 Index
Citation Counts
75
200
18,865
Impact of pollutants on the aquatic environment
Rankings
Ranking Based On Selection: 2
Ute Skiba
Metrics
H-Index
i10 Index
Citation Counts
73
180
20,309
Greenhouse gases
nitrogen
agriculture
nitric oxide
Rankings
Ranking Based On Selection: 3
Jonathan G Evans
Metrics
H-Index
i10 Index
Citation Counts
72
294
21,840
Rankings
Ranking Based On Selection: 4
David Spurgeon
Metrics
H-Index
i10 Index
Citation Counts
70
151
17,951
Pollution and Ecotoxicology
Rankings
Ranking Based On Selection: 5
Prudhomme
Metrics
H-Index
i10 Index
Citation Counts
61
128
14,247
hydrological forecasting
flood
drought
Rankings
Ranking Based On Selection: 6
Richard Shore
Metrics
H-Index
i10 Index
Citation Counts
56
166
10,775
vertebrate ecotoxicology
Rankings
Ranking Based On Selection: 7
Simon Smart
Metrics
H-Index
i10 Index
Citation Counts
52
126
10,581
conservation of wild plants
monitoring
plant traits
species niche modelling
Rankings
Ranking Based On Selection: 8
Mike Bowes
Metrics
H-Index
i10 Index
Citation Counts
48
91
7,646
Phosphorus
Eutrophication
Algal Blooms
Rivers
Rankings
Ranking Based On Selection: 9
Don Monteith
Metrics
H-Index
i10 Index
Citation Counts
48
94
13,387
Environmental Change
Acidification
Dissolved Organic Carbon
Rankings
Ranking Based On Selection: 10
Michael Dunbar
Metrics
H-Index
i10 Index
Citation Counts
39
65
5,997
Rankings
Ranking Based On Selection: 11
David C Howard
Metrics
H-Index
i10 Index
Citation Counts
38
79
5,867
Rankings
Ranking Based On Selection: 12
Alice J Robson
Metrics
H-Index
i10 Index
Citation Counts
38
63
6,141
Rankings
Ranking Based On Selection: 13
Monika D. Jürgens
Metrics
H-Index
i10 Index
Citation Counts
33
44
4,299
water quality
chemical contamination
fish
Rankings
Ranking Based On Selection: 14
Felicity Hayes
Metrics
H-Index
i10 Index
Citation Counts
33
65
3,798
Rankings
Ranking Based On Selection: 15
Gloria Pereira
Metrics
H-Index
i10 Index
Citation Counts
32
82
4,225
Rankings
Ranking Based On Selection: 16
Julia Drewer
Metrics
H-Index
i10 Index
Citation Counts
30
53
3,298
Rankings
Ranking Based On Selection: 17
Michael Hutchins
Metrics
H-Index
i10 Index
Citation Counts
30
51
3,220
Rankings
Ranking Based On Selection: 18
Susan Tandy
Metrics
H-Index
i10 Index
Citation Counts
28
46
3,793
soil
metal(loid)s
bioavailability
plants
phosphorus
Rankings
Ranking Based On Selection: 19
Gary D. Powney
Metrics
H-Index
i10 Index
Citation Counts
27
41
3,785
Rankings
Ranking Based On Selection: 20
Mhairi Coyle
Metrics
H-Index
i10 Index
Citation Counts
27
37
7,344
land-atmosphere exchange
eddy covariance
trace gases
ozone
vegetation
Rankings
Ranking Based On Selection: 21
Tom August
Metrics
H-Index
i10 Index
Citation Counts
26
42
3,835
Rankings
Ranking Based On Selection: 22
France Gerard
Metrics
H-Index
i10 Index
Citation Counts
26
46
2,847
vegetation remote sensing
Rankings
Ranking Based On Selection: 23
Clare Rowland
Metrics
H-Index
i10 Index
Citation Counts
22
44
2,884
Remote Sensing
Land Cover Mapping
LCM2015
Rankings
Ranking Based On Selection: 24
Simon Oakley
Metrics
H-Index
i10 Index
Citation Counts
22
25
4,521
Soil
Carbon
Greenhouse Gas
Nitrogen
Rankings
Ranking Based On Selection: 25
Jan Baas
Metrics
H-Index
i10 Index
Citation Counts
21
28
1,782
mixtures
bio diversity
species sensitivity
Rankings
Ranking Based On Selection: 26
Amanda Thomson
Metrics
H-Index
i10 Index
Citation Counts
21
37
2,052
Rankings
Ranking Based On Selection: 27
Denise Pallett
Metrics
H-Index
i10 Index
Citation Counts
21
27
1,164
Rankings
Ranking Based On Selection: 28
Annette Burden
Metrics
H-Index
i10 Index
Citation Counts
20
29
2,026
Rankings
Ranking Based On Selection: 29
Edward Carnell
Metrics
H-Index
i10 Index
Citation Counts
16
21
914
Ammonia
Greenhouse gases
Agriculture
Rankings
Ranking Based On Selection: 30
Cornelia Klein
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,121
land-atmosphere interactions
organised convection
monsoon dynamics
Rankings
Ranking Based On Selection: 31
Amy Thomas
Metrics
H-Index
i10 Index
Citation Counts
16
19
816
Soils
modelling
land use change
Rankings
Ranking Based On Selection: 32
Emma Gardner
Metrics
H-Index
i10 Index
Citation Counts
16
18
868
Rankings
Ranking Based On Selection: 33
Emma J Barton
Metrics
H-Index
i10 Index
Citation Counts
16
18
1,677
Land-atmosphere interaction
Rankings
Ranking Based On Selection: 34
John Watkins
Metrics
H-Index
i10 Index
Citation Counts
15
18
2,244
Environmental data science
Rankings
Ranking Based On Selection: 35
Klementyna A. Gawecka
Metrics
H-Index
i10 Index
Citation Counts
11
11
385
Rankings
Ranking Based On Selection: 36
Sue Rennie
Metrics
H-Index
i10 Index
Citation Counts
11
12
367
Environmental data
Long-term environmental research (LTER)
Rankings
Ranking Based On Selection: 37
Aneurin W O'Neil
Metrics
H-Index
i10 Index
Citation Counts
10
11
653
Remote Sensing
GIS
Land Cover Mapping
Rankings
Ranking Based On Selection: 39
Faiza Samreen
Metrics
H-Index
i10 Index
Citation Counts
10
10
317
Distributed Systems
Cloud Computing
Machine Learning
Environmental science
Cloud brokerage
Rankings
Ranking Based On Selection: 40
Sam Harrison
Metrics
H-Index
i10 Index
Citation Counts
9
9
453
exposure modelling
fate modelling
environmental contaminants
environmental modelling
physics
Rankings
Ranking Based On Selection: 41
Festus Asaaga
Metrics
H-Index
i10 Index
Citation Counts
9
9
282
Land Tenure
One Health
Knowledge co-production
Social Ecology
Zoonoses
Rankings
Ranking Based On Selection: 42
Alan Radbourne
Metrics
H-Index
i10 Index
Citation Counts
9
9
210
Rankings
Ranking Based On Selection: 43
Kasia Sawicka
Metrics
H-Index
i10 Index
Citation Counts
9
8
426
biogeochemical modelling
spatial ecosystem modelling
Rankings
Ranking Based On Selection: 44
Hollie M Cooper
Metrics
H-Index
i10 Index
Citation Counts
9
7
618
Environmental monitoring
land surface science
Rankings
Ranking Based On Selection: 45
Elizabeth S Cooper
Metrics
H-Index
i10 Index
Citation Counts
9
9
360
hydrological processes
land surface processes
data assimilation
mathematical modelling
Rankings
Ranking Based On Selection: 46
Kelly E. Mason
Metrics
H-Index
i10 Index
Citation Counts
8
8
4,216
Rankings
Ranking Based On Selection: 47
James M. Cash
Metrics
H-Index
i10 Index
Citation Counts
7
7
166
Rankings
Ranking Based On Selection: 48
Adam Griffin
Metrics
H-Index
i10 Index
Citation Counts
7
5
154
Statistics
Extreme Value Analysis
Hydrology
Probability Theory
Rankings
Ranking Based On Selection: 49
Joshua Talib
Metrics
H-Index
i10 Index
Citation Counts
7
5
130
Tropical Meteorology
Land-Atmosphere Interactions
Climate Science
Hydrology
Rankings
Ranking Based On Selection: 50
Muhammad Afzal
Metrics
H-Index
i10 Index
Citation Counts
7
5
191
Climate variability
Water resources management
Rankings
Ranking Based On Selection: 51
Rishma Chengot
Metrics
H-Index
i10 Index
Citation Counts
7
3
107
Climate change
Hydrology
Water Resources Management
Rankings
Ranking Based On Selection: 52
Bethan L. Harris
Metrics
H-Index
i10 Index
Citation Counts
6
4
75
Tropical meteorology
land-atmosphere interactions
Rankings
Ranking Based On Selection: 53
Laura Bentley
Metrics
H-Index
i10 Index
Citation Counts
5
5
227
Land management for soil health and carbon sequestration
Rankings
Ranking Based On Selection: 54
Samuel Jb Robinson
Metrics
H-Index
i10 Index
Citation Counts
5
4
135
Land use and climate change impacts on biodiversity and ecosystem functions
Rankings
Ranking Based On Selection: 55
Anita Lazurko
Metrics
H-Index
i10 Index
Citation Counts
5
4
94
scenarios
transformation
social-ecological systems
resilience
epistemology
Rankings
Ranking Based On Selection: 56
Guillaume Chagnaud
Metrics
H-Index
i10 Index
Citation Counts
5
2
369
Land-atmosphere interactions
humid heat waves
climate change
Rankings
Ranking Based On Selection: 57
Isabelle Fournier
Metrics
H-Index
i10 Index
Citation Counts
4
4
97
freshwater
phytoplankton
microbial activity
contaminants
chemistry
Rankings
Ranking Based On Selection: 58
Hermann Kam
Metrics
H-Index
i10 Index
Citation Counts
4
3
49
Land management
Agri-environmental policy
Rural geography
Rankings
Ranking Based On Selection: 59
Amy Thorpe
Metrics
H-Index
i10 Index
Citation Counts
4
2
39
Molecular ecology
Environmental DNA
Ancient DNA
Microbial ecology
Rankings
Ranking Based On Selection: 60
Clare Brewster
Metrics
H-Index
i10 Index
Citation Counts
3
0
19
air pollution effects on plants
Rankings
Ranking Based On Selection: 61
Holly Tipper
Metrics
H-Index
i10 Index
Citation Counts
2
2
52
antimicrobial resistance
AMR
environmental pollution
freshwater pollution
Rankings
Ranking Based On Selection: 62
John Robotham
Metrics
H-Index
i10 Index
Citation Counts
2
1
40