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" (873,937 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 :2
Zhanqing Li
Climate Change and Environment
Remote Sensing
Atmospheric Physics
Metrics
H-Index
i10 Index
Citation
96
378
34,241
Ross Salawitch
Atmospheric Chemistry and Composition
Ozone Layer
Air Pollution
Climate Change
Metrics
H-Index
i10 Index
Citation
72
196
18,728
* Rankings
Ranking Based On Selection :6
Mark A Cochrane
Interdisciplinary Science
Land Cover/Use Change
Climate Change
Conservation Biology
Landscape Dynamics
Metrics
H-Index
i10 Index
Citation
61
145
25,942
* Rankings
Ranking Based On Selection :8
Michael Roman
Biological oceanography
zooplankton ecology
hypoxia effects on pelagic food webs
Metrics
H-Index
i10 Index
Citation
59
103
13,767
* Rankings
Ranking Based On Selection :11
Laixiang Sun
Regional sciences and regional economics
Climate change mitigation and adaptation
Integrated modelling and applied systems ana
Metrics
H-Index
i10 Index
Citation
48
109
9,219
* Rankings
Ranking Based On Selection :15
Michael Gonsior
Marine and freshwater biogeochemistry
Environmental Engineering
Environmental Chemistry
Metrics
H-Index
i10 Index
Citation
43
78
5,989
* Rankings
Ranking Based On Selection :20
Amir Sapkota
Climate Change and Health
Air Pollution
Cardiopulmonary Diseases
Renal disease
Metrics
H-Index
i10 Index
Citation
39
79
35,462
* Rankings
Ranking Based On Selection :22
Lee Blaney
environmental engineering
environmental chemistry
contaminants of emerging concern
ion exchange
Metrics
H-Index
i10 Index
Citation
35
64
5,308
* Rankings
Ranking Based On Selection :26
Xin Zhang
Environmental science and policy
food security and climate change
atmospheric science
Metrics
H-Index
i10 Index
Citation
33
55
7,395
Hao He
Atmospheric Chemistry
Chemical Transport Model
Climate Change
Metrics
H-Index
i10 Index
Citation
22
30
2,222
Yun Ya Yang
Environmental Soil Chemistry
Emerging Contaminants
Water Quality
Nutrient Management
Soil Health
Metrics
H-Index
i10 Index
Citation
20
22
1,908
* Rankings
Ranking Based On Selection :42
Susanne Lachmuth
Plant evolutionary ecology
quantitative ecology
biostatistics
research data management
Metrics
H-Index
i10 Index
Citation
18
25
1,048
* Rankings
Ranking Based On Selection :45
Leanne Powers
environmental photochemistry
marine chemistry
reactive oxygen species
aquatic biogeochemistry
ocean optics
Metrics
H-Index
i10 Index
Citation
17
28
1,067
Jifu Yin
Remote Sensing
Data assimilation
Land surface model
Drought
Climate change
Metrics
H-Index
i10 Index
Citation
17
28
1,012
Michael D Gerst
environmental systems analysis
risk science
decision science
climate change
Metrics
H-Index
i10 Index
Citation
15
20
1,182
Guangbin Li
Anaerobic ammonium oxidation (anammox)
Wastewater/water treatment
Environmental engineering
Biological degradation
Bioremedi
Metrics
H-Index
i10 Index
Citation
13
13
530
Sahar Souizi
Environmental Engineering
Chemical Engineering
Nutrient recovery
Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
2
1
29
Alexandra S Fries
marine biology
environmental management
science communication
environmental report cards
science visualizations
Metrics
H-Index
i10 Index
Citation
1
1
12
Yufeng Jia
Marine Microbial Ecology
Marine Biogeochemistry
Microbial Molecular Technology
Biological Oceanography
Metrics
H-Index
i10 Index
Citation
1
0
2
Rankings
Ranking Based On Selection: 2
Zhanqing Li
Metrics
H-Index
i10 Index
Citation Counts
96
378
34,241
Climate Change and Environment
Remote Sensing
Atmospheric Physics
Rankings
Ranking Based On Selection: 3
Patricia Glibert
Metrics
H-Index
i10 Index
Citation Counts
88
217
34,523
Rankings
Ranking Based On Selection: 4
Ross Salawitch
Metrics
H-Index
i10 Index
Citation Counts
72
196
18,728
Atmospheric Chemistry and Composition
Ozone Layer
Air Pollution
Climate Change
Rankings
Ranking Based On Selection: 6
Mark A Cochrane
Metrics
H-Index
i10 Index
Citation Counts
61
145
25,942
Interdisciplinary Science
Land Cover/Use Change
Climate Change
Conservation Biology
Landscape Dynamics
Rankings
Ranking Based On Selection: 8
Michael Roman
Metrics
H-Index
i10 Index
Citation Counts
59
103
13,767
Biological oceanography
zooplankton ecology
hypoxia effects on pelagic food webs
Rankings
Ranking Based On Selection: 10
Feng Chen
Metrics
H-Index
i10 Index
Citation Counts
53
117
10,569
Rankings
Ranking Based On Selection: 11
Laixiang Sun
Metrics
H-Index
i10 Index
Citation Counts
48
109
9,219
Regional sciences and regional economics
Climate change mitigation and adaptation
Integrated modelling and applied systems ana
Rankings
Ranking Based On Selection: 12
Jeffrey Cornwell
Metrics
H-Index
i10 Index
Citation Counts
48
91
11,402
Rankings
Ranking Based On Selection: 13
Thomas R Fisher
Metrics
H-Index
i10 Index
Citation Counts
46
77
10,752
biogeochemistry
watershed hydrology
watershed ecology
estuarine ecology
Rankings
Ranking Based On Selection: 14
Matthew C Fitzpatrick
Metrics
H-Index
i10 Index
Citation Counts
45
72
10,401
species distribution modelling
global change
biodiversity
macroecology
biogeography
Rankings
Ranking Based On Selection: 15
Michael Gonsior
Metrics
H-Index
i10 Index
Citation Counts
43
78
5,989
Marine and freshwater biogeochemistry
Environmental Engineering
Environmental Chemistry
Rankings
Ranking Based On Selection: 16
Louise Chini
Metrics
H-Index
i10 Index
Citation Counts
43
58
36,563
Rankings
Ranking Based On Selection: 17
Upal Ghosh
Metrics
H-Index
i10 Index
Citation Counts
43
79
7,270
Rankings
Ranking Based On Selection: 19
Alba Torrents
Metrics
H-Index
i10 Index
Citation Counts
41
81
5,092
Rankings
Ranking Based On Selection: 20
Amir Sapkota
Metrics
H-Index
i10 Index
Citation Counts
39
79
35,462
Climate Change and Health
Air Pollution
Cardiopulmonary Diseases
Renal disease
Rankings
Ranking Based On Selection: 21
J Edward Gates
Metrics
H-Index
i10 Index
Citation Counts
36
59
5,714
Rankings
Ranking Based On Selection: 22
Lee Blaney
Metrics
H-Index
i10 Index
Citation Counts
35
64
5,308
environmental engineering
environmental chemistry
contaminants of emerging concern
ion exchange
Rankings
Ranking Based On Selection: 23
Judith M O Neil
Metrics
H-Index
i10 Index
Citation Counts
34
51
6,384
Rankings
Ranking Based On Selection: 24
Christopher L Rowe
Metrics
H-Index
i10 Index
Citation Counts
34
53
4,042
Rankings
Ranking Based On Selection: 25
Zhen Zhang
Metrics
H-Index
i10 Index
Citation Counts
33
59
7,185
Rankings
Ranking Based On Selection: 26
Xin Zhang
Metrics
H-Index
i10 Index
Citation Counts
33
55
7,395
Environmental science and policy
food security and climate change
atmospheric science
Rankings
Ranking Based On Selection: 27
Puneet Srivastava
Metrics
H-Index
i10 Index
Citation Counts
33
85
3,488
Water Resources
Climate Change
Drought
Ecological Engineering
Rankings
Ranking Based On Selection: 28
David M Nelson
Metrics
H-Index
i10 Index
Citation Counts
30
56
4,911
paleoecology
stable isotope ecology
biogeochemistry
global change
Rankings
Ranking Based On Selection: 30
James Pierson
Metrics
H-Index
i10 Index
Citation Counts
27
40
2,051
Rankings
Ranking Based On Selection: 31
Brian Needelman
Metrics
H-Index
i10 Index
Citation Counts
26
41
3,743
Soils
wetlands
agriculture
climate change
geospatial analyses
Rankings
Ranking Based On Selection: 32
Robert H Hilderbrand
Metrics
H-Index
i10 Index
Citation Counts
26
38
3,420
Rankings
Ranking Based On Selection: 33
Cathy O Brien Stephens
Metrics
H-Index
i10 Index
Citation Counts
25
31
5,277
Rankings
Ranking Based On Selection: 34
William Nardin
Metrics
H-Index
i10 Index
Citation Counts
23
36
1,804
Rankings
Ranking Based On Selection: 35
Emily B Cohen
Metrics
H-Index
i10 Index
Citation Counts
22
28
2,127
Rankings
Ranking Based On Selection: 36
Hao He
Metrics
H-Index
i10 Index
Citation Counts
22
30
2,222
Atmospheric Chemistry
Chemical Transport Model
Climate Change
Rankings
Ranking Based On Selection: 37
Greg M Silsbe
Metrics
H-Index
i10 Index
Citation Counts
22
29
1,536
Biological Oceanography
Limnology
Phytoplankton Physiology
Remote Sensing
Rankings
Ranking Based On Selection: 39
Vyacheslav Lyubchich
Metrics
H-Index
i10 Index
Citation Counts
20
32
1,218
Rankings
Ranking Based On Selection: 40
Yun Ya Yang
Metrics
H-Index
i10 Index
Citation Counts
20
22
1,908
Environmental Soil Chemistry
Emerging Contaminants
Water Quality
Nutrient Management
Soil Health
Rankings
Ranking Based On Selection: 41
Simon Costanzo
Metrics
H-Index
i10 Index
Citation Counts
20
24
5,877
Rankings
Ranking Based On Selection: 42
Susanne Lachmuth
Metrics
H-Index
i10 Index
Citation Counts
18
25
1,048
Plant evolutionary ecology
quantitative ecology
biostatistics
research data management
Rankings
Ranking Based On Selection: 43
K Halimeda Kilbourne
Metrics
H-Index
i10 Index
Citation Counts
18
24
2,555
Rankings
Ranking Based On Selection: 44
Lora Harris
Metrics
H-Index
i10 Index
Citation Counts
18
24
1,107
Rankings
Ranking Based On Selection: 45
Leanne Powers
Metrics
H-Index
i10 Index
Citation Counts
17
28
1,067
environmental photochemistry
marine chemistry
reactive oxygen species
aquatic biogeochemistry
ocean optics
Rankings
Ranking Based On Selection: 46
Jifu Yin
Metrics
H-Index
i10 Index
Citation Counts
17
28
1,012
Remote Sensing
Data assimilation
Land surface model
Drought
Climate change
Rankings
Ranking Based On Selection: 47
Haitham Khraishah
Metrics
H-Index
i10 Index
Citation Counts
16
19
906
Rankings
Ranking Based On Selection: 48
David T Elliott
Metrics
H-Index
i10 Index
Citation Counts
16
17
818
Environmental Science
Oceanography
Aquatic Ecology
Plankton Ecology
Rankings
Ranking Based On Selection: 50
Michael D Gerst
Metrics
H-Index
i10 Index
Citation Counts
15
20
1,182
environmental systems analysis
risk science
decision science
climate change
Rankings
Ranking Based On Selection: 52
Rodney Richardson
Metrics
H-Index
i10 Index
Citation Counts
14
17
1,181
Statistics
Applied Ecology
Pollinators
Bioinformatics
Ecological Metagenetics
Rankings
Ranking Based On Selection: 53
Yu Mo
Metrics
H-Index
i10 Index
Citation Counts
14
16
1,016
Rankings
Ranking Based On Selection: 55
Guangbin Li
Metrics
H-Index
i10 Index
Citation Counts
13
13
530
Anaerobic ammonium oxidation (anammox)
Wastewater/water treatment
Environmental engineering
Biological degradation
Bioremedi
Rankings
Ranking Based On Selection: 56
Ruben Delgado
Metrics
H-Index
i10 Index
Citation Counts
13
15
684
Rankings
Ranking Based On Selection: 57
Jyoteshwar R Nagol Jyothy
Metrics
H-Index
i10 Index
Citation Counts
12
13
1,788
Remote Sensing
Climate Change
Vegetation Dynamics
Uncertainty
UAV
Rankings
Ranking Based On Selection: 58
Ana Prados
Metrics
H-Index
i10 Index
Citation Counts
12
12
1,137
Rankings
Ranking Based On Selection: 59
Genevieve M Nesslage
Metrics
H-Index
i10 Index
Citation Counts
10
11
344
Rankings
Ranking Based On Selection: 62
Maureen Brooks
Metrics
H-Index
i10 Index
Citation Counts
9
9
866
Coupled biological-physical modeling
macroalgae
trophic dynamics
systems ecology
Rankings
Ranking Based On Selection: 70
Tan Zou
Metrics
H-Index
i10 Index
Citation Counts
5
5
615
Sustainable Development
Nutrient Budgets
Water Quality
Global Change
Rankings
Ranking Based On Selection: 71
Donya Hamidi
Metrics
H-Index
i10 Index
Citation Counts
5
4
199
Environmental Engineering
Contaminants of Emerging Concern
Ion Exchange
Rankings
Ranking Based On Selection: 73
Carol Kim
Metrics
H-Index
i10 Index
Citation Counts
5
4
91
Microbial Ecology
Geomicrobiology
Biogeochemistry
Sediment Biogeochemistry
Rankings
Ranking Based On Selection: 74
Lauren Rodriguez
Metrics
H-Index
i10 Index
Citation Counts
5
3
86
Environmental DNA
Marine Mammals
Bioinformatics
Geographic Information Systems
Rankings
Ranking Based On Selection: 75
Nicole Mattocks
Metrics
H-Index
i10 Index
Citation Counts
5
2
116
Environmental social work
environmental justice
urban neighborhoods
Rankings
Ranking Based On Selection: 78
Joel Bostic
Metrics
H-Index
i10 Index
Citation Counts
4
4
89
Rankings
Ranking Based On Selection: 79
Brennan Smith
Metrics
H-Index
i10 Index
Citation Counts
4
2
90
Rankings
Ranking Based On Selection: 80
Hilda Fadaei
Metrics
H-Index
i10 Index
Citation Counts
3
2
94
Rankings
Ranking Based On Selection: 81
Claire Nemes
Metrics
H-Index
i10 Index
Citation Counts
3
2
50
Migration biology
avian ecology
bird conservation
phenology
anthropogenic threats
Rankings
Ranking Based On Selection: 83
Lauren Jonas
Metrics
H-Index
i10 Index
Citation Counts
2
1
71
microbiology
molecular biology
microbial ecology
carbon capture technology
Rankings
Ranking Based On Selection: 84
Sahar Souizi
Metrics
H-Index
i10 Index
Citation Counts
2
1
29
Environmental Engineering
Chemical Engineering
Nutrient recovery
Wastewater Treatment
Rankings
Ranking Based On Selection: 85
Brian Tsuru
Metrics
H-Index
i10 Index
Citation Counts
2
1
26
Rankings
Ranking Based On Selection: 86
Brendan Campbell
Metrics
H-Index
i10 Index
Citation Counts
2
0
13
aquaculture
shellfish
hydrodynamics
production
ecosystem services
Rankings
Ranking Based On Selection: 87
Katherine Wencheng Liu
Metrics
H-Index
i10 Index
Citation Counts
1
1
164
Rankings
Ranking Based On Selection: 88
Sarah E Roth
Metrics
H-Index
i10 Index
Citation Counts
1
1
20
Rankings
Ranking Based On Selection: 89
Alexandra S Fries
Metrics
H-Index
i10 Index
Citation Counts
1
1
12
marine biology
environmental management
science communication
environmental report cards
science visualizations
Rankings
Ranking Based On Selection: 90
Yeganeh Mansourian
Metrics
H-Index
i10 Index
Citation Counts
1
0
7
Environmental Science
Immunology
Cardiology
Nano Particles
Medicine
Rankings
Ranking Based On Selection: 91
Yufeng Jia
Metrics
H-Index
i10 Index
Citation Counts
1
0
2
Marine Microbial Ecology
Marine Biogeochemistry
Microbial Molecular Technology
Biological Oceanography