North America Scientist and University Rankings 2025
North America Engineering & Technology / Marine Sciences and Engineering 3.177 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
Biological Oceanography
nutrients
phytoplankton
Metrics
H-Index
i10 Index
Citation Counts
173
996
136,405
* Total H IndexRankings
Ranking Based On Selection: 2
microbiology
oceanography
earth sciences
biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
137
476
76,888
* Total H IndexRankings
Ranking Based On Selection: 3
Climate change
climate variability
climate modeling
ocean-atmospheric dynamics
Metrics
H-Index
i10 Index
Citation Counts
127
421
74,525
* Total H IndexRankings
Ranking Based On Selection: 4
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Metrics
H-Index
i10 Index
Citation Counts
123
459
78,803
* Total H IndexRankings
Ranking Based On Selection: 5
Environment
Climate Change
Ecology
Metrics
H-Index
i10 Index
Citation Counts
119
269
79,321
* Total H IndexRankings
Ranking Based On Selection: 6
Marine ecology
conservation biology
Metrics
H-Index
i10 Index
Citation Counts
118
267
82,348
* Total H IndexRankings
Ranking Based On Selection: 7
harmful algal blooms
HABs
marine biotoxins
toxins
red tides
Metrics
H-Index
i10 Index
Citation Counts
118
428
54,159
* Total H IndexRankings
Ranking Based On Selection: 8
Chemical Oceanographer Carbon Cycle Ocean Acidiification
Metrics
H-Index
i10 Index
Citation Counts
117
387
83,198
* Total H IndexRankings
Ranking Based On Selection: 9
Marine Benthic Ecology
Biodiversity
Metrics
H-Index
i10 Index
Citation Counts
116
335
52,292
* Total H IndexRankings
Ranking Based On Selection: 10
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
115
260
60,969
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
marine conservation
coral reefs
small scale fisheries
social ecological systems
climate change
Metrics
H-Index
i10 Index
Citation Counts
115
321
44,939
* Total H IndexRankings
Ranking Based On Selection: 12
Biological oceanography
Marine microbiology
Microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
114
226
60,270
* Total H IndexRankings
Ranking Based On Selection: 13
Atmospheric chemistry
aerosols
climate
Metrics
H-Index
i10 Index
Citation Counts
113
228
53,044
* Total H IndexRankings
Ranking Based On Selection: 14
Oceanography
Climate
Metrics
H-Index
i10 Index
Citation Counts
112
356
51,062
* Total H IndexRankings
Ranking Based On Selection: 15
Oceanography
Microbiology
Ecology
Metrics
H-Index
i10 Index
Citation Counts
112
207
50,435
* Total H IndexRankings
Ranking Based On Selection: 16
biogeochemistry
geobiology
astrobiology
paleoceanography
Metrics
H-Index
i10 Index
Citation Counts
109
284
47,411
* Total H IndexRankings
Ranking Based On Selection: 17
Bioactive marine natural products
marine algae and cyanobacteria
biosynthesis
genomics and microbial interactions
chemical e
Metrics
H-Index
i10 Index
Citation Counts
107
441
42,993
* Total H IndexRankings
Ranking Based On Selection: 18
Oceanography
Metrics
H-Index
i10 Index
Citation Counts
106
283
45,736
* Total H IndexRankings
Ranking Based On Selection: 19
Marine microbiology
Metrics
H-Index
i10 Index
Citation Counts
104
217
53,100
* Total H IndexRankings
Ranking Based On Selection: 20
microbial ecology
microbial oceanography
Metrics
H-Index
i10 Index
Citation Counts
104
224
35,842
* Total H IndexRankings
Ranking Based On Selection: 21
climate
biogeochemical cycles
energy / environment
ocean acidification
Metrics
H-Index
i10 Index
Citation Counts
103
272
58,159
* Total H IndexRankings
Ranking Based On Selection: 22
Global Change
Marine biodiversity
Fisheries
Conservation Biology
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
102
286
52,192
* Total H IndexRankings
Ranking Based On Selection: 23
Oceanography
Marine Science
Biogeochemistry
Remote Sensing
Spatial Ecology
Metrics
H-Index
i10 Index
Citation Counts
102
210
40,972
* Total H IndexRankings
Ranking Based On Selection: 24
Geosciences
Metrics
H-Index
i10 Index
Citation Counts
102
221
48,045
* Total H IndexRankings
Ranking Based On Selection: 25
Paleoceanography
Paleoclimatology
Metrics
H-Index
i10 Index
Citation Counts
101
199
54,779
Paul J Harrison
University of British Columbia
Vancouver, Canada
Metrics
H-Index
i10-Index
Citation Counts
173
996
136,405
Biological Oceanography
nutrients
phytoplankton
David Karl
University of Hawaii System
Honolulu, United States
Metrics
H-Index
i10-Index
Citation Counts
137
476
76,888
microbiology
oceanography
earth sciences
biogeochemistry
Shang Ping Xie
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
127
421
74,525
Climate change
climate variability
climate modeling
ocean-atmospheric dynamics
Frank Millero
University of Miami
Coral Gables, United States
Metrics
H-Index
i10-Index
Citation Counts
123
459
78,803
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Veerabhadran Ramanathan
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
119
269
79,321
Environment
Climate Change
Ecology
Benjamin S Halpern
University of California Santa Barbara
Santa Barbara, United States
Metrics
H-Index
i10-Index
Citation Counts
118
267
82,348
Marine ecology
conservation biology
Donald M Anderson
Metrics
H-Index
i10-Index
Citation Counts
118
428
54,159
harmful algal blooms
HABs
marine biotoxins
toxins
red tides
Richard Feely
Metrics
H-Index
i10-Index
Citation Counts
117
387
83,198
Chemical Oceanographer Carbon Cycle Ocean Acidiification
Lisa Levin
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
116
335
52,292
Marine Benthic Ecology
Biodiversity
Edward Francis Delong
University of Hawaii System
Honolulu, United States
Metrics
H-Index
i10-Index
Citation Counts
115
260
60,969
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
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
Tim Mcclanahan
Wildlife Conservation Society
New York, United States
Metrics
H-Index
i10-Index
Citation Counts
115
321
44,939
marine conservation
coral reefs
small scale fisheries
social ecological systems
climate change
Jed A Fuhrman
University of Southern California
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
114
226
60,270
Biological oceanography
Marine microbiology
Microbial ecology
Joseph M Prospero
University of Miami
Coral Gables, United States
Metrics
H-Index
i10-Index
Citation Counts
113
228
53,044
Atmospheric chemistry
aerosols
climate
Sallie W Chisholm
Metrics
H-Index
i10-Index
Citation Counts
112
207
50,435
Oceanography
Microbiology
Ecology
Timothy W Lyons
University of California Riverside
Riverside, United States
Metrics
H-Index
i10-Index
Citation Counts
109
284
47,411
biogeochemistry
geobiology
astrobiology
paleoceanography
William Gerwick
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
107
441
42,993
Bioactive marine natural products
marine algae and cyanobacteria
biosynthesis
genomics and microbial interactions
chemical e
FP Chavez
Metrics
H-Index
i10-Index
Citation Counts
106
283
45,736
Farooq Azam
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
104
217
53,100
David Kirchman
University of Delaware
Newark, United States
Metrics
H-Index
i10-Index
Citation Counts
104
224
35,842
microbial ecology
microbial oceanography
Ken Caldeira
Carnegie Institution for Science
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
103
272
58,159
climate
biogeochemical cycles
energy / environment
ocean acidification
William Cheung
University of British Columbia
Vancouver, Canada
Metrics
H-Index
i10-Index
Citation Counts
102
286
52,192
Global Change
Marine biodiversity
Fisheries
Conservation Biology
Climate Change
David A Siegel
University of California Santa Barbara
Santa Barbara, United States
Metrics
H-Index
i10-Index
Citation Counts
102
210
40,972
Oceanography
Marine Science
Biogeochemistry
Remote Sensing
Spatial Ecology
Stanley R Hart
Metrics
H-Index
i10-Index
Citation Counts
102
221
48,045
James Zachos
University of California Santa Cruz
Santa Cruz, United States
Metrics
H-Index
i10-Index
Citation Counts
101
199
54,779
Paleoceanography
Paleoclimatology