University, Subject, Country, Region, World
US Environmental Protection Agency 84 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Jan 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (873.690) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Lung diseases
iron homeostasis
fibers
particles
air pollution
Metrics
H-Index
i10 Index
Citation Counts
85
291
25,327
* Total H IndexRankings
Ranking Based On Selection: 2
Environmental Soil Chemistry
Synchrotron Techniques
Bioavailability
Nanoparticles in the Environment
Plant Uptake
Metrics
H-Index
i10 Index
Citation Counts
72
192
21,901
* Total H IndexRankings
Ranking Based On Selection: 3
Environment
landscape ecology
remote sensing
GIS
Metrics
H-Index
i10 Index
Citation Counts
55
104
21,351
* Total H IndexRankings
Ranking Based On Selection: 4
air pollution immunology host defence
Metrics
H-Index
i10 Index
Citation Counts
50
118
7,742
* Total H IndexRankings
Ranking Based On Selection: 5
emissions
air quality
biomass burning
Metrics
H-Index
i10 Index
Citation Counts
46
77
7,552
* Total H IndexRankings
Ranking Based On Selection: 6
regulatory air methods
wildland fire emissions
air quality sensors
source apportionment
Metrics
H-Index
i10 Index
Citation Counts
42
83
6,813
* Total H IndexRankings
Ranking Based On Selection: 7
fossil & biofuel combustion
air pollution
flame generated fine particles
oxy-coal combustion
PFAS incineration
Metrics
H-Index
i10 Index
Citation Counts
41
81
6,066
* Total H IndexRankings
Ranking Based On Selection: 8
Drinking Water
Metrics
H-Index
i10 Index
Citation Counts
40
95
5,127
* Total H IndexRankings
Ranking Based On Selection: 9
Environment
Metrics
H-Index
i10 Index
Citation Counts
40
57
9,051
* Total H IndexRankings
Ranking Based On Selection: 10
environmental statistics
spatial survey design
statistical graphics
Metrics
H-Index
i10 Index
Citation Counts
39
80
7,404
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* Total H IndexRankings
Ranking Based On Selection: 11
Biosphere-Atmosphere Interactions
Air-Quality
Climate Change
Biogeochemistry
Nitrogen
Metrics
H-Index
i10 Index
Citation Counts
38
63
5,176
* Total H IndexRankings
Ranking Based On Selection: 12
Environmental Science
Air Quality
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
38
49
6,391
* Total H IndexRankings
Ranking Based On Selection: 13
climate
global change
environmental science
Metrics
H-Index
i10 Index
Citation Counts
37
62
9,096
* Total H IndexRankings
Ranking Based On Selection: 14
risk analysis
air pollution
benefit cost analysis
Metrics
H-Index
i10 Index
Citation Counts
36
62
31,649
* Total H IndexRankings
Ranking Based On Selection: 15
Air Pollution
Metrics
H-Index
i10 Index
Citation Counts
35
47
7,453
* Total H IndexRankings
Ranking Based On Selection: 16
air quality
air monitoring technology
mobile monitoring
sensors
Metrics
H-Index
i10 Index
Citation Counts
34
47
5,799
* Total H IndexRankings
Ranking Based On Selection: 17
Air Quality
Metrics
H-Index
i10 Index
Citation Counts
33
51
3,539
* Total H IndexRankings
Ranking Based On Selection: 18
Air Quality
Metrics
H-Index
i10 Index
Citation Counts
33
53
3,380
* Total H IndexRankings
Ranking Based On Selection: 19
Environmental Health
Air Pollution
Epidemiology
Metrics
H-Index
i10 Index
Citation Counts
32
45
3,567
* Total H IndexRankings
Ranking Based On Selection: 20
Air Quality
Chemical Transport Models
Organic aerosol
Gas-Particle Interactions
Cloud-Aerosol Interactions
Metrics
H-Index
i10 Index
Citation Counts
29
42
2,600
* Total H IndexRankings
Ranking Based On Selection: 21
Combustion Emissions
Biomass Burning
Air Quality
Aerosol Measurement
Metrics
H-Index
i10 Index
Citation Counts
29
39
2,701
* Total H IndexRankings
Ranking Based On Selection: 22
Aquatic Ecology
Environmental Science
Metrics
H-Index
i10 Index
Citation Counts
29
53
2,435
* Total H IndexRankings
Ranking Based On Selection: 23
environmental engineering
contaminated sediments
emerging contaminants
Metrics
H-Index
i10 Index
Citation Counts
29
47
3,507
* Total H IndexRankings
Ranking Based On Selection: 24
enviroment
SAS
Metrics
H-Index
i10 Index
Citation Counts
29
39
3,674
* Total H IndexRankings
Ranking Based On Selection: 25
Air Pollution
Intervention
Signal Transduction
Metrics
H-Index
i10 Index
Citation Counts
28
45
3,502
Andrew Ghio
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
85
291
25,327
Lung diseases
iron homeostasis
fibers
particles
air pollution
Kirk G Scheckel
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
72
192
21,901
Environmental Soil Chemistry
Synchrotron Techniques
Bioavailability
Nanoparticles in the Environment
Plant Uptake
James Wickham
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
55
104
21,351
Environment
landscape ecology
remote sensing
GIS
M Ian Gilmour
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
50
118
7,742
air pollution immunology host defence
George Pouliot
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
46
77
7,552
emissions
air quality
biomass burning
Matthew S Landis
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
42
83
6,813
regulatory air methods
wildland fire emissions
air quality sensors
source apportionment
William Linak
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
41
81
6,066
fossil & biofuel combustion
air pollution
flame generated fine particles
oxy-coal combustion
PFAS incineration
Darren Lytle
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
40
95
5,127
Jane Bare
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
40
57
9,051
Tony Olsen
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
39
80
7,404
environmental statistics
spatial survey design
statistical graphics
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Jesse Bash
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
38
63
5,176
Biosphere-Atmosphere Interactions
Air-Quality
Climate Change
Biogeochemistry
Nitrogen
Robert W Pinder
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
38
49
6,391
Environmental Science
Air Quality
Climate Change
Christopher P Weaver
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
37
62
9,096
climate
global change
environmental science
Bryan Hubbell
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
36
62
31,649
risk analysis
air pollution
benefit cost analysis
Neal Fann
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
35
47
7,453
Gayle Sw Hagler
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
34
47
5,799
air quality
air monitoring technology
mobile monitoring
sensors
Sergey L Napelenok
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
33
51
3,539
Daiwen Kang
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
33
53
3,380
Tom Luben
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
32
45
3,567
Environmental Health
Air Pollution
Epidemiology
Benjamin N Murphy
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
29
42
2,600
Air Quality
Chemical Transport Models
Organic aerosol
Gas-Particle Interactions
Cloud-Aerosol Interactions
Amara Holder
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
29
39
2,701
Combustion Emissions
Biomass Burning
Air Quality
Aerosol Measurement
Joel Hoffman
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
29
53
2,435
Aquatic Ecology
Environmental Science
Marc A Mills
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
29
47
3,507
environmental engineering
contaminated sediments
emerging contaminants
Carry Croghan
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
29
39
3,674
Haiyan Tong
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
28
45
3,502
Air Pollution
Intervention
Signal Transduction