World Scientist and University Rankings 2025
Engineering & Technology / Marine Sciences and Engineering 11.080 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 Feb 16, 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 (888.752) 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
organic geochemistry
microbiology
Metrics
H-Index
i10 Index
Citation Counts
165
848
104,224
* Total H IndexRankings
Ranking Based On Selection: 3
Marine biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
139
353
69,402
* Total H IndexRankings
Ranking Based On Selection: 4
microbiology
oceanography
earth sciences
biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
137
476
76,888
* Total H IndexRankings
Ranking Based On Selection: 5
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: 6
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: 7
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Metrics
H-Index
i10 Index
Citation Counts
121
281
108,829
* Total H IndexRankings
Ranking Based On Selection: 8
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
Metrics
H-Index
i10 Index
Citation Counts
121
362
55,350
* Total H IndexRankings
Ranking Based On Selection: 9
Environment
Climate Change
Ecology
Metrics
H-Index
i10 Index
Citation Counts
119
269
79,321
* Total H IndexRankings
Ranking Based On Selection: 10
Marine ecology
conservation biology
Metrics
H-Index
i10 Index
Citation Counts
118
267
82,348
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* Total H IndexRankings
Ranking Based On Selection: 11
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: 12
Chemical Oceanographer Carbon Cycle Ocean Acidiification
Metrics
H-Index
i10 Index
Citation Counts
117
387
83,198
* Total H IndexRankings
Ranking Based On Selection: 13
Marine Benthic Ecology
Biodiversity
Metrics
H-Index
i10 Index
Citation Counts
116
335
52,292
* Total H IndexRankings
Ranking Based On Selection: 14
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
115
260
60,969
* Total H IndexRankings
Ranking Based On Selection: 15
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: 16
Biological oceanography
Marine microbiology
Microbial ecology
Metrics
H-Index
i10 Index
Citation Counts
114
226
60,270
* Total H IndexRankings
Ranking Based On Selection: 17
Hydrological Modelling
Climate analysis
Statistics
Programming
Oceanography
Metrics
H-Index
i10 Index
Citation Counts
113
176
90,557
* Total H IndexRankings
Ranking Based On Selection: 18
Atmospheric chemistry
aerosols
climate
Metrics
H-Index
i10 Index
Citation Counts
113
228
53,044
* Total H IndexRankings
Ranking Based On Selection: 19
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Metrics
H-Index
i10 Index
Citation Counts
112
411
63,544
* Total H IndexRankings
Ranking Based On Selection: 20
Oceanography
Climate
Metrics
H-Index
i10 Index
Citation Counts
112
356
51,062
* Total H IndexRankings
Ranking Based On Selection: 21
Oceanography
Microbiology
Ecology
Metrics
H-Index
i10 Index
Citation Counts
112
207
50,435
* Total H IndexRankings
Ranking Based On Selection: 22
Ocean optics (海洋光学）
Metrics
H-Index
i10 Index
Citation Counts
110
1,031
60,073
* Total H IndexRankings
Ranking Based On Selection: 23
biogeochemistry
geobiology
astrobiology
paleoceanography
Metrics
H-Index
i10 Index
Citation Counts
109
284
47,411
* 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
107
392
42,666
* 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
107
441
42,993
Paul J Harrison
University of British Columbia
Vancouver, Canada
Metrics
H-Index
i10-Index
Citation Counts
173
996
136,405
Biological Oceanography
nutrients
phytoplankton
Jaap Sinninghe Damste
Metrics
H-Index
i10-Index
Citation Counts
165
848
104,224
organic geochemistry
microbiology
Bo Barker Jørgensen
Aarhus University
Aarhus, Denmark
Metrics
H-Index
i10-Index
Citation Counts
139
353
69,402
Marine biogeochemistry
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
Richard Thompson
University of Plymouth
Plymouth, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
121
281
108,829
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Malcolm Mcculloch
University of Western Australia
Crawley, Australia
Metrics
H-Index
i10-Index
Citation Counts
121
362
55,350
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
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
Maximize your institution's potential with our 360° Institutional Analysis Subscription and Institutional Exclusive Package, offering comprehensive insights and strategic advantages.
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
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
Letizia Lusito
Università del Salento
Lecce, Italy
Metrics
H-Index
i10-Index
Citation Counts
113
176
90,557
Hydrological Modelling
Climate analysis
Statistics
Programming
Oceanography
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
Robert J Nicholls
University of East Anglia
Norwich, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
112
411
63,544
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Sallie W Chisholm
Metrics
H-Index
i10-Index
Citation Counts
112
207
50,435
Oceanography
Microbiology
Ecology
Guifen Wang (王桂芬）
Metrics
H-Index
i10-Index
Citation Counts
110
1,031
60,073
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
Roberto Danovaro
Metrics
H-Index
i10-Index
Citation Counts
107
392
42,666
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
107
441
42,993
Bioactive marine natural products
marine algae and cyanobacteria
biosynthesis
genomics and microbial interactions
chemical e