North America Scientist and University Rankings 2025
North America Engineering & Technology / Environmental Science & Engineering 3.915 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 Mar 06, 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 (943.645) 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
environmental engineering
membrane separations
environmental nanotechnology
desalination
water
Metrics
H-Index
i10 Index
Citation Counts
208
554
159,289
* Total H IndexRankings
Ranking Based On Selection: 2
biogeochemistry
ecology
environmental science
climate change
ecohydrology
Metrics
H-Index
i10 Index
Citation Counts
172
492
163,902
* Total H IndexRankings
Ranking Based On Selection: 3
Microbial fuel cells
microbial electrolysis cells
thermal batteries
desalination
water electrolyzers
Metrics
H-Index
i10 Index
Citation Counts
169
545
121,898
* Total H IndexRankings
Ranking Based On Selection: 4
climate change
ecology
carbon cycle
leaf nitrogen
Metrics
H-Index
i10 Index
Citation Counts
163
383
172,287
* Total H IndexRankings
Ranking Based On Selection: 5
Environmental & soil chemistry
adsorption
nanoparticles
microplastics
food safety
Metrics
H-Index
i10 Index
Citation Counts
154
874
100,749
* Total H IndexRankings
Ranking Based On Selection: 6
air pollution
environmental health
environmental epidemiology
built environment
Metrics
H-Index
i10 Index
Citation Counts
149
447
168,916
* Total H IndexRankings
Ranking Based On Selection: 7
Environmental endocrinology
Metrics
H-Index
i10 Index
Citation Counts
142
508
73,508
* Total H IndexRankings
Ranking Based On Selection: 8
environmental chemistry
atmospheric chemistry
environmental engineering
Metrics
H-Index
i10 Index
Citation Counts
132
431
84,392
* Total H IndexRankings
Ranking Based On Selection: 9
Oceanography
Biogeochemistry
Marine Ecosystems
Climate
Carbon Cycle
Metrics
H-Index
i10 Index
Citation Counts
129
378
92,046
* Total H IndexRankings
Ranking Based On Selection: 10
air pollution
exposure
built environment
health effects
GIS
Metrics
H-Index
i10 Index
Citation Counts
124
303
58,341
360° Institutional Performance & Benchmarking Click Here for Live Demo
Through advanced, institution-specific analytics and benchmarking, gain data-driven strategic insights into your academic performance, global standing, and competitive strengths. Compare your institution with 20 similarly ranked institutions at city, country, regional, and global levels, as well as with those in similar standings across 13 subjects, to uncover your institution’s strengths. More Info
* Total H IndexRankings
Ranking Based On Selection: 11
Climate change
atmospheric chemistry
climate policy
Metrics
H-Index
i10 Index
Citation Counts
124
282
101,283
* Total H IndexRankings
Ranking Based On Selection: 12
Conservation Biology
stable isotopes
Metrics
H-Index
i10 Index
Citation Counts
124
577
62,289
* Total H IndexRankings
Ranking Based On Selection: 13
Biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
123
248
75,400
* Total H IndexRankings
Ranking Based On Selection: 14
Environmental Nanotechnology
Environmental Science & Engineering
Nanotoxicology
Environmental Chemistry
Phytoremediation
Metrics
H-Index
i10 Index
Citation Counts
122
392
49,080
* Total H IndexRankings
Ranking Based On Selection: 15
conservation science
ecosystem services
environmental science
sustainable agriculture
sustainable development
Metrics
H-Index
i10 Index
Citation Counts
122
248
99,507
* Total H IndexRankings
Ranking Based On Selection: 16
Environmental Biotechnology
Environmental Engineering
Biogeochemistry
Resource Recovery
Metrics
H-Index
i10 Index
Citation Counts
122
627
66,495
* Total H IndexRankings
Ranking Based On Selection: 17
Environmental Science & Engineering
Contaminant Hydrology
Environmental Nanotechnology
Biochar
Metrics
H-Index
i10 Index
Citation Counts
121
404
61,599
* Total H IndexRankings
Ranking Based On Selection: 18
environmental engineering
environmental nanotechnology
water treatment
biodegradation
Metrics
H-Index
i10 Index
Citation Counts
119
394
62,646
* Total H IndexRankings
Ranking Based On Selection: 19
environmental engineering
environmental science
biogeochemistry
air pollution effects
human disturbance of ecosystems
Metrics
H-Index
i10 Index
Citation Counts
119
512
56,515
* Total H IndexRankings
Ranking Based On Selection: 20
water treatment
environmental nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
118
397
60,948
* Total H IndexRankings
Ranking Based On Selection: 21
Environmental Science
Air Pollution
Aerosol
Metrics
H-Index
i10 Index
Citation Counts
117
461
50,449
* Total H IndexRankings
Ranking Based On Selection: 22
Environmental Health
Air pollution
Epidemiology
Metrics
H-Index
i10 Index
Citation Counts
116
256
50,638
* Total H IndexRankings
Ranking Based On Selection: 23
Environmental Engineering
Environmental science
Biotechnology
Metrics
H-Index
i10 Index
Citation Counts
116
409
42,687
* Total H IndexRankings
Ranking Based On Selection: 24
Microbiology
Ecology
Evolution
Metrics
H-Index
i10 Index
Citation Counts
114
313
84,040
* Total H IndexRankings
Ranking Based On Selection: 25
Environment
Pollution
Cardiometabolic
Planetary Health
Metrics
H-Index
i10 Index
Citation Counts
113
370
85,307
Menachem Elimelech
Rice University
Houston, United States
Metrics
H-Index
i10-Index
Citation Counts
208
554
159,289
environmental engineering
membrane separations
environmental nanotechnology
desalination
water
Robert B Jackson
Stanford University
Stanford, United States
Metrics
H-Index
i10-Index
Citation Counts
172
492
163,902
biogeochemistry
ecology
environmental science
climate change
ecohydrology
Bruce E Logan
Pennsylvania State University
University Park, United States
Metrics
H-Index
i10-Index
Citation Counts
169
545
121,898
Microbial fuel cells
microbial electrolysis cells
thermal batteries
desalination
water electrolyzers
Christopher B Field
Stanford University
Stanford, United States
Metrics
H-Index
i10-Index
Citation Counts
163
383
172,287
climate change
ecology
carbon cycle
leaf nitrogen
Baoshan Xing
Metrics
H-Index
i10-Index
Citation Counts
154
874
100,749
Environmental & soil chemistry
adsorption
nanoparticles
microplastics
food safety
Michael Brauer
University of British Columbia
Vancouver, Canada
Metrics
H-Index
i10-Index
Citation Counts
149
447
168,916
air pollution
environmental health
environmental epidemiology
built environment
John C Wingfield
Metrics
H-Index
i10-Index
Citation Counts
142
508
73,508
Environmental endocrinology
Michael R Hoffmann
Metrics
H-Index
i10-Index
Citation Counts
132
431
84,392
environmental chemistry
atmospheric chemistry
environmental engineering
Scott Doney
University of Virginia
Charlottesville, United States
Metrics
H-Index
i10-Index
Citation Counts
129
378
92,046
Oceanography
Biogeochemistry
Marine Ecosystems
Climate
Carbon Cycle
Michael Jerrett
University of California Los Angeles
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
124
303
58,341
air pollution
exposure
built environment
health effects
GIS
360° Institutional Performance & Benchmarking Click Here for Live Demo
Through advanced, institution-specific analytics and benchmarking, gain data-driven strategic insights into your academic performance, global standing, and competitive strengths. Compare your institution with 20 similarly ranked institutions at city, country, regional, and global levels, as well as with those in similar standings across 13 subjects, to uncover your institution’s strengths. More Info
Drew Shindell
Duke University
Durham, United States
Metrics
H-Index
i10-Index
Citation Counts
124
282
101,283
Climate change
atmospheric chemistry
climate policy
Keith A Hobson
Environment Canada
Ottawa, Canada
Metrics
H-Index
i10-Index
Citation Counts
124
577
62,289
Conservation Biology
stable isotopes
Eric A Davidson
Metrics
H-Index
i10-Index
Citation Counts
123
248
75,400
Jorge Gardea Torresdey
University of Texas El Paso
El Paso, United States
Metrics
H-Index
i10-Index
Citation Counts
122
392
49,080
Environmental Nanotechnology
Environmental Science & Engineering
Nanotoxicology
Environmental Chemistry
Phytoremediation
Gretchen C Daily
Stanford University
Stanford, United States
Metrics
H-Index
i10-Index
Citation Counts
122
248
99,507
conservation science
ecosystem services
environmental science
sustainable agriculture
sustainable development
Bruce E Rittmann
Metrics
H-Index
i10-Index
Citation Counts
122
627
66,495
Environmental Biotechnology
Environmental Engineering
Biogeochemistry
Resource Recovery
Bin Gao
University of Florida
Gainesville, United States
Metrics
H-Index
i10-Index
Citation Counts
121
404
61,599
Environmental Science & Engineering
Contaminant Hydrology
Environmental Nanotechnology
Biochar
Pedro Jj Alvarez
Rice University
Houston, United States
Metrics
H-Index
i10-Index
Citation Counts
119
394
62,646
environmental engineering
environmental nanotechnology
water treatment
biodegradation
Charles T Driscoll
Syracuse University
Syracuse, United States
Metrics
H-Index
i10-Index
Citation Counts
119
512
56,515
environmental engineering
environmental science
biogeochemistry
air pollution effects
human disturbance of ecosystems
Paul Westerhoff
Metrics
H-Index
i10-Index
Citation Counts
118
397
60,948
water treatment
environmental nanotechnology
John G Watson
Metrics
H-Index
i10-Index
Citation Counts
117
461
50,449
Environmental Science
Air Pollution
Aerosol
Antonella Zanobetti
Harvard University
Cambridge, United States
Metrics
H-Index
i10-Index
Citation Counts
116
256
50,638
Environmental Health
Air pollution
Epidemiology
Joo Hwa Tay
University of Calgary
Calgary, Canada
Metrics
H-Index
i10-Index
Citation Counts
116
409
42,687
Environmental Engineering
Environmental science
Biotechnology
David A Stahl
University of Washington
Seattle, United States
Metrics
H-Index
i10-Index
Citation Counts
114
313
84,040
Microbiology
Ecology
Evolution
Sanjay Rajagopalan
Case Western Reserve University
Cleveland, United States
Metrics
H-Index
i10-Index
Citation Counts
113
370
85,307
Environment
Pollution
Cardiometabolic
Planetary Health