Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Architecture and Design, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
![Paul J Harrison](https://cdn.adscientificindex.com/pictures/39/641065.jpg)
Biological Oceanography
nutrients
phytoplankton
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
131,823
52,882
0.401
![Richard Thompson](https://cdn.adscientificindex.com/pictures/9d/1043868.jpg)
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100,857
75,261
0.746
![Benjamin S Halpern](/user/assets/images/profile/no-profile-photo.png)
Marine ecology
conservation biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
78,419
39,951
0.509
![Frank Millero](https://cdn.adscientificindex.com/pictures/4c/1301054.jpg)
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,215
20,143
0.261
![Veerabhadran Ramanathan](https://cdn.adscientificindex.com/pictures/d5/1771479.jpg)
Environment
Climate Change
Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,882
29,439
0.383
![David Karl](https://cdn.adscientificindex.com/pictures/77/1614305.jpg)
microbiology
oceanography
earth sciences
biogeochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
74,720
24,563
0.329
![Shang Ping Xie](https://cdn.adscientificindex.com/pictures/bb/1771510.jpg)
Climate change
climate variability
climate modeling
ocean-atmospheric dynamics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
71,452
37,718
0.528
![Katherine Richardson](/user/assets/images/profile/no-profile-photo.png)
plankton ecosystems
carbon cycling in the ocean
Earth System science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,060
35,856
0.587
![Robert J Nicholls](https://cdn.adscientificindex.com/pictures/e6/1364664.jpg)
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,050
29,296
0.480
![Valerie J Smith](https://cdn.adscientificindex.com/pictures/4e/1189761.jpg)
comparative immunology
fish immunology
marine microbiology
marine biotechnology
SOI-USTAN
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60,703
32,113
0.529
![Edward Francis Delong](https://cdn.adscientificindex.com/pictures/76/1614310.jpg)
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,731
16,531
0.277
![Jed A Fuhrman](https://cdn.adscientificindex.com/pictures/67/1623501.jpg)
Biological oceanography
Marine microbiology
Microbial ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,232
23,117
0.397
![Robert Steneck](https://cdn.adscientificindex.com/pictures/ed/1293018.jpg)
Marine Ecology
Evolutionary Biology
Conservation Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,679
19,117
0.337
![NL Bindoff](https://cdn.adscientificindex.com/pictures/b0/65693.jpg)
Oceanography
Physical Oceanography
Climate Change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,225
24,505
0.436
![Malcolm Mcculloch](https://cdn.adscientificindex.com/pictures/d1/126432.jpg)
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,866
16,742
0.311
![Harry Swinney](https://cdn.adscientificindex.com/pictures/f6/1640694.jpg)
instabilities
fluid dynamics
bacterial dynamics
physical oceanography
granular media
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,855
9,813
0.182
![James Zachos](https://cdn.adscientificindex.com/pictures/2e/1848276.jpg)
Paleoceanography
Paleoclimatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,024
17,813
0.336
![Joseph M Prospero](https://cdn.adscientificindex.com/pictures/e7/1303577.jpg)
Atmospheric chemistry
aerosols
climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52,050
13,335
0.256
![Farooq Azam](/user/assets/images/profile/no-profile-photo.png)
Marine microbiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,967
13,560
0.261
![Lisa Levin](https://cdn.adscientificindex.com/pictures/d9/1771565.jpg)
Marine Benthic Ecology
Biodiversity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,701
24,469
0.492
![Christopher Sabine](https://cdn.adscientificindex.com/pictures/f3/1614313.jpg)
carbon cycle
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,668
18,009
0.378
![William Cheung](https://cdn.adscientificindex.com/pictures/1f/641811.jpg)
Global Change
Marine biodiversity
Fisheries
Conservation Biology
Climate Change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,400
33,852
0.714
![Villy Christensen](https://cdn.adscientificindex.com/pictures/2e/641675.jpg)
Ecosystems
Ecosystem modeling
Fisheries
Fisheries management
Ecopath
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,152
15,230
0.323
![Lynne Talley](https://cdn.adscientificindex.com/pictures/4f/1771610.jpg)
oceanography
ocean circulation
ocean climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,159
16,715
0.362
![Timothy W Lyons](https://cdn.adscientificindex.com/pictures/97/1770527.jpg)
biogeochemistry
geobiology
astrobiology
paleoceanography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,299
25,231
0.557
Paul J Harrison
University of British Columbia
Vancouver, Canada
![Canada](/flags/ca.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
131,823
52,882
0.401
Biological Oceanography
nutrients
phytoplankton
Richard Thompson
University of Plymouth
Plymouth, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100,857
75,261
0.746
Microplastics
ecology of coastal defences
marine ecology
marine pollution
Benjamin S Halpern
University of California Santa Barbara
Santa Barbara, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
78,419
39,951
0.509
Marine ecology
conservation biology
Frank Millero
University of Miami
Coral Gables, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,215
20,143
0.261
Physical Chemistry of Natural Waters
Chemical Oceanography
Marine Chemistry
Veerabhadran Ramanathan
University of California San Diego
San Diego, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,882
29,439
0.383
Environment
Climate Change
Ecology
David Karl
University of Hawaii System
Honolulu, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
74,720
24,563
0.329
microbiology
oceanography
earth sciences
biogeochemistry
Shang Ping Xie
University of California San Diego
San Diego, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
71,452
37,718
0.528
Climate change
climate variability
climate modeling
ocean-atmospheric dynamics
Katherine Richardson
University of Copenhagen
Copenhagen, Denmark
![Denmark](/flags/dk.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,060
35,856
0.587
plankton ecosystems
carbon cycling in the ocean
Earth System science
Robert J Nicholls
University of East Anglia
Norwich, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,050
29,296
0.480
Coastal Systems
Climate Change
Impacts
Adaptation
Integrated Assessment
Valerie J Smith
University of Saint Andrews
St Andrews, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60,703
32,113
0.529
comparative immunology
fish immunology
marine microbiology
marine biotechnology
SOI-USTAN
Edward Francis Delong
University of Hawaii System
Honolulu, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,731
16,531
0.277
microbiology
marine microbiology
microbial genomics
metagenomics
microbial ecology
Jed A Fuhrman
University of Southern California
Los Angeles, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,232
23,117
0.397
Biological oceanography
Marine microbiology
Microbial ecology
Robert Steneck
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,679
19,117
0.337
Marine Ecology
Evolutionary Biology
Conservation Biology
NL Bindoff
University of Tasmania
Hobart, Australia
![Australia](/flags/au.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,225
24,505
0.436
Oceanography
Physical Oceanography
Climate Change
Malcolm Mcculloch
University of Western Australia
Crawley, Australia
![Australia](/flags/au.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,866
16,742
0.311
coastal processes
coral reefs
coral calcification
ocean acidification
climate change
Harry Swinney
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,855
9,813
0.182
instabilities
fluid dynamics
bacterial dynamics
physical oceanography
granular media
James Zachos
University of California Santa Cruz
Santa Cruz, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
53,024
17,813
0.336
Paleoceanography
Paleoclimatology
Joseph M Prospero
University of Miami
Coral Gables, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52,050
13,335
0.256
Atmospheric chemistry
aerosols
climate
Farooq Azam
University of California San Diego
San Diego, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,967
13,560
0.261
Lisa Levin
University of California San Diego
San Diego, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,701
24,469
0.492
Marine Benthic Ecology
Biodiversity
Christopher Sabine
University of Hawaii System
Honolulu, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,668
18,009
0.378
William Cheung
University of British Columbia
Vancouver, Canada
![Canada](/flags/ca.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,400
33,852
0.714
Global Change
Marine biodiversity
Fisheries
Conservation Biology
Climate Change
Villy Christensen
University of British Columbia
Vancouver, Canada
![Canada](/flags/ca.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,152
15,230
0.323
Ecosystems
Ecosystem modeling
Fisheries
Fisheries management
Ecopath
Lynne Talley
University of California San Diego
San Diego, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,159
16,715
0.362
oceanography
ocean circulation
ocean climate
Timothy W Lyons
University of California Riverside
Riverside, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,299
25,231
0.557
biogeochemistry
geobiology
astrobiology
paleoceanography