Subject Rankings
Engineering & Technology / Marine Sciences and Engineering 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 Dec 21, 2024, 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 (873.897) 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
172
992
134,209
* Total H IndexRankings
Ranking Based On Selection: 2
organic geochemistry
microbiology
Metrics
H-Index
i10 Index
Citation Counts
164
846
103,195
* Total H IndexRankings
Ranking Based On Selection: 3
Marine biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
139
352
68,836
* Total H IndexRankings
Ranking Based On Selection: 4
microbiology
oceanography
earth sciences
biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
135
475
75,994
* Total H IndexRankings
Ranking Based On Selection: 5
Climate change
climate variability
climate modeling
ocean-atmospheric dynamics
Metrics
H-Index
i10 Index
Citation Counts
126
414
73,047
* Total H IndexRankings
Ranking Based On Selection: 6
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Metrics
H-Index
i10 Index
Citation Counts
124
458
78,210
* Total H IndexRankings
Ranking Based On Selection: 7
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
Metrics
H-Index
i10 Index
Citation Counts
121
361
54,720
* Total H IndexRankings
Ranking Based On Selection: 8
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Metrics
H-Index
i10 Index
Citation Counts
120
273
105,148
* Total H IndexRankings
Ranking Based On Selection: 9
Environment
Climate Change
Ecology
Metrics
H-Index
i10 Index
Citation Counts
118
269
78,300
* Total H IndexRankings
Ranking Based On Selection: 10
harmful algal blooms
HABs
marine biotoxins
toxins
red tides
Metrics
H-Index
i10 Index
Citation Counts
118
426
53,484
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* Total H IndexRankings
Ranking Based On Selection: 11
Marine ecology
conservation biology
Metrics
H-Index
i10 Index
Citation Counts
117
261
80,696
* Total H IndexRankings
Ranking Based On Selection: 12
Chemical Oceanographer Carbon Cycle Ocean Acidiification
Metrics
H-Index
i10 Index
Citation Counts
116
381
81,618
* Total H IndexRankings
Ranking Based On Selection: 13
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
115
257
60,408
* Total H IndexRankings
Ranking Based On Selection: 14
Marine Benthic Ecology
Biodiversity
Metrics
H-Index
i10 Index
Citation Counts
115
332
51,098
* Total H IndexRankings
Ranking Based On Selection: 15
Biological oceanography
Marine microbiology
Microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
114
225
59,445
* Total H IndexRankings
Ranking Based On Selection: 16
marine conservation
coral reefs
small scale fisheries
social ecological systems
climate change
Metrics
H-Index
i10 Index
Citation Counts
114
319
44,429
* Total H IndexRankings
Ranking Based On Selection: 17
Atmospheric chemistry
aerosols
climate
Metrics
H-Index
i10 Index
Citation Counts
113
225
52,582
* Total H IndexRankings
Ranking Based On Selection: 18
Hydrological Modelling
Climate analysis
Statistics
Programming
Oceanography
Metrics
H-Index
i10 Index
Citation Counts
112
175
89,193
* Total H IndexRankings
Ranking Based On Selection: 19
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Metrics
H-Index
i10 Index
Citation Counts
111
411
62,283
* Total H IndexRankings
Ranking Based On Selection: 20
Oceanography
Climate
Metrics
H-Index
i10 Index
Citation Counts
111
355
50,152
* Total H IndexRankings
Ranking Based On Selection: 21
Oceanography
Microbiology
Ecology
Metrics
H-Index
i10 Index
Citation Counts
111
207
49,984
* Total H IndexRankings
Ranking Based On Selection: 22
biogeochemistry
geobiology
astrobiology
paleoceanography
Metrics
H-Index
i10 Index
Citation Counts
109
280
46,586
* Total H IndexRankings
Ranking Based On Selection: 23
Ocean optics (海洋光学）
Metrics
H-Index
i10 Index
Citation Counts
109
1,028
59,313
* Total H IndexRankings
Ranking Based On Selection: 24
Marine Biology
Deep-sea Biology
Marine Ecology
Microbial Ecology
Marine Biodiversity
Metrics
H-Index
i10 Index
Citation Counts
106
385
41,866
* Total H IndexRankings
Ranking Based On Selection: 25
Bioactive marine natural products
marine algae and cyanobacteria
biosynthesis
genomics and microbial interactions
chemical e
Metrics
H-Index
i10 Index
Citation Counts
105
438
42,204
Paul J Harrison
University of British Columbia
Vancouver, Canada
Metrics
H-Index
i10-Index
Citation Counts
172
992
134,209
Biological Oceanography
nutrients
phytoplankton
Jaap Sinninghe Damste
Metrics
H-Index
i10-Index
Citation Counts
164
846
103,195
organic geochemistry
microbiology
Bo Barker Jørgensen
Aarhus University
Aarhus, Denmark
Metrics
H-Index
i10-Index
Citation Counts
139
352
68,836
Marine biogeochemistry
David Karl
University of Hawaii System
Honolulu, United States
Metrics
H-Index
i10-Index
Citation Counts
135
475
75,994
microbiology
oceanography
earth sciences
biogeochemistry
Shang Ping Xie
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
126
414
73,047
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
124
458
78,210
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Malcolm Mcculloch
University of Western Australia
Crawley, Australia
Metrics
H-Index
i10-Index
Citation Counts
121
361
54,720
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
Richard Thompson
University of Plymouth
Plymouth, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
120
273
105,148
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Veerabhadran Ramanathan
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
118
269
78,300
Environment
Climate Change
Ecology
Donald M Anderson
Metrics
H-Index
i10-Index
Citation Counts
118
426
53,484
harmful algal blooms
HABs
marine biotoxins
toxins
red tides
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Benjamin S Halpern
University of California Santa Barbara
Santa Barbara, United States
Metrics
H-Index
i10-Index
Citation Counts
117
261
80,696
Marine ecology
conservation biology
Richard Feely
Metrics
H-Index
i10-Index
Citation Counts
116
381
81,618
Chemical Oceanographer Carbon Cycle Ocean Acidiification
Edward Francis Delong
University of Hawaii System
Honolulu, United States
Metrics
H-Index
i10-Index
Citation Counts
115
257
60,408
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Lisa Levin
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
115
332
51,098
Marine Benthic Ecology
Biodiversity
Jed A Fuhrman
University of Southern California
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
114
225
59,445
Biological oceanography
Marine microbiology
Microbial ecology
Tim Mcclanahan
Wildlife Conservation Society
New York, United States
Metrics
H-Index
i10-Index
Citation Counts
114
319
44,429
marine conservation
coral reefs
small scale fisheries
social ecological systems
climate change
Joseph M Prospero
University of Miami
Coral Gables, United States
Metrics
H-Index
i10-Index
Citation Counts
113
225
52,582
Atmospheric chemistry
aerosols
climate
Letizia Lusito
Università del Salento
Lecce, Italy
Metrics
H-Index
i10-Index
Citation Counts
112
175
89,193
Hydrological Modelling
Climate analysis
Statistics
Programming
Oceanography
Robert J Nicholls
University of East Anglia
Norwich, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
111
411
62,283
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Sallie W Chisholm
Metrics
H-Index
i10-Index
Citation Counts
111
207
49,984
Oceanography
Microbiology
Ecology
Timothy W Lyons
University of California Riverside
Riverside, United States
Metrics
H-Index
i10-Index
Citation Counts
109
280
46,586
biogeochemistry
geobiology
astrobiology
paleoceanography
Guifen Wang (王桂芬）
Metrics
H-Index
i10-Index
Citation Counts
109
1,028
59,313
Roberto Danovaro
Metrics
H-Index
i10-Index
Citation Counts
106
385
41,866
Marine Biology
Deep-sea Biology
Marine Ecology
Microbial Ecology
Marine Biodiversity
William Gerwick
University of California San Diego
San Diego, United States
Metrics
H-Index
i10-Index
Citation Counts
105
438
42,204
Bioactive marine natural products
marine algae and cyanobacteria
biosynthesis
genomics and microbial interactions
chemical e