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)
![Steven Running](https://cdn.adscientificindex.com/pictures/23/4327187.jpg)
earth science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
114,949
36,238
0.315
![Jonathan Richard Lloyd](https://cdn.adscientificindex.com/pictures/ff/1548572.jpg)
geomicrobiology
environmental microbiology
nanotechnology
biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,679
32,780
0.387
![M Santosh](https://cdn.adscientificindex.com/pictures/f3/676920.jpg)
Earth and Environmental Sciences [Univ. of Adelaide]
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,288
47,572
0.564
![Michele Limon](https://cdn.adscientificindex.com/pictures/11/1464004.jpg)
Observational Cosmology
Astronomical Instrumentation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
83,758
18,140
0.217
![Kenneth H Nealson](https://cdn.adscientificindex.com/pictures/da/1623470.jpg)
environmental microbiology
bioluminescence
geobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79,344
22,358
0.282
![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
![Eske Willerslev](/user/assets/images/profile/no-profile-photo.png)
evolution
genomics
population genetics
ancient DNA
environmental DNA
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,777
41,027
0.556
![James Randerson](https://cdn.adscientificindex.com/pictures/0c/1748877.jpg)
carbon cycle
biogeochemistry
climate change
land use change
sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
70,742
31,536
0.446
![T Mark Harrison](https://cdn.adscientificindex.com/pictures/f4/1750485.jpg)
Geochemistry
Geology
Early Earth
SIMS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
69,202
20,406
0.295
![Robert Dickinson](/user/assets/images/profile/no-profile-photo.png)
land surface processes
climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
64,664
14,524
0.225
![Donald E Canfield](/user/assets/images/profile/no-profile-photo.png)
oxygen
evolution
oceanography
geobiology
biogeochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,103
22,710
0.366
![Stephen Sparks](https://cdn.adscientificindex.com/pictures/ff/4322675.jpg)
geology
volcanology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,413
16,966
0.276
![Zhidan Zhao / 赵志丹](https://cdn.adscientificindex.com/pictures/bb/710104.jpg)
Lithospheric Geochemistry
Cenozoic evolution of Tibetan Plateaau and adjacent region through magmatic study
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,281
27,412
0.447
![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
![CJ Hawkesworth](/user/assets/images/profile/no-profile-photo.png)
Geology
Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,348
16,909
0.285
![Yang Shen](/user/assets/images/profile/no-profile-photo.png)
seismology
marine geophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,093
36,215
0.613
![Paul D Ryan](https://cdn.adscientificindex.com/pictures/4f/1845961.jpg)
Geology
Tectonics
Statistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,670
26,449
0.459
![Matthew Colless](https://cdn.adscientificindex.com/pictures/9e/127034.jpg)
Observational cosmology
galaxy formation and evolution
clusters of galaxies
astronomical instrumentation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,777
18,374
0.324
![Donald L Turcotte](https://cdn.adscientificindex.com/pictures/e9/1742168.jpg)
Geodynamics
Complexity
Fractals
Natural Hazards
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,995
10,365
0.188
![Øyvind Hammer](https://cdn.adscientificindex.com/pictures/f6/1852235.jpg)
Geology
biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,837
25,315
0.498
![Thomas P Guilderson](https://cdn.adscientificindex.com/pictures/ef/1848277.jpg)
applied isotope geochemistry
carbon cycle
natural climate variability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,490
18,808
0.373
![George Gehrels](/user/assets/images/profile/no-profile-photo.png)
Geosciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,229
21,398
0.426
![Eric Rignot](https://cdn.adscientificindex.com/pictures/1a/1748900.jpg)
Cryosphere
Greenland
Antarctica
Glaciology
Polar Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,053
22,129
0.442
![Yong-Fei Zheng 郑永飞|Zheng Yongfei, Zheng YF](https://cdn.adscientificindex.com/pictures/e9/710108.jpg)
Plate tectonics
Convergent margin
Subduction zone
Collisional orogen
Chemical geodynamics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,100
19,200
0.399
![Roger Powell](https://cdn.adscientificindex.com/pictures/14/65456.jpg)
Earth Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,828
15,893
0.332
Steven Running
University of Montana, Missoula
Missoula, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
114,949
36,238
0.315
Jonathan Richard Lloyd
University of Manchester
Manchester, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,679
32,780
0.387
geomicrobiology
environmental microbiology
nanotechnology
biotechnology
M Santosh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,288
47,572
0.564
Earth and Environmental Sciences [Univ. of Adelaide]
Michele Limon
University of Pennsylvania
Philadelphia, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
83,758
18,140
0.217
Observational Cosmology
Astronomical Instrumentation
Kenneth H Nealson
University of Southern California
Los Angeles, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79,344
22,358
0.282
environmental microbiology
bioluminescence
geobiology
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
Eske Willerslev
University of Copenhagen
Copenhagen, Denmark
![Denmark](/flags/dk.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,777
41,027
0.556
evolution
genomics
population genetics
ancient DNA
environmental DNA
James Randerson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
70,742
31,536
0.446
carbon cycle
biogeochemistry
climate change
land use change
sustainability
T Mark Harrison
University of California Los Angeles
Los Angeles, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
69,202
20,406
0.295
Geochemistry
Geology
Early Earth
SIMS
Robert Dickinson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
64,664
14,524
0.225
land surface processes
climate
Donald E Canfield
University of Southern Denmark
Tianjin, Denmark
![Denmark](/flags/dk.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,103
22,710
0.366
oxygen
evolution
oceanography
geobiology
biogeochemistry
Stephen Sparks
University of Bristol
Bristol, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,413
16,966
0.276
Zhidan Zhao / 赵志丹
China University of Geosciences, Beijing
Beijing, Beijing, China
![China](/flags/cn.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,281
27,412
0.447
Lithospheric Geochemistry
Cenozoic evolution of Tibetan Plateaau and adjacent region through magmatic study
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
CJ Hawkesworth
University of Bristol
Bristol, United Kingdom
![United Kingdom](/flags/gb.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,348
16,909
0.285
Yang Shen
University of Rhode Island
Kingston, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,093
36,215
0.613
seismology
marine geophysics
Paul D Ryan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,670
26,449
0.459
Geology
Tectonics
Statistics
Matthew Colless
Australian National University
Canberra, Australia
![Australia](/flags/au.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,777
18,374
0.324
Observational cosmology
galaxy formation and evolution
clusters of galaxies
astronomical instrumentation
Donald L Turcotte
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,995
10,365
0.188
Geodynamics
Complexity
Fractals
Natural Hazards
Øyvind Hammer
University of Oslo
Oslo, Norway
![Norway](/flags/no.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,837
25,315
0.498
Thomas P Guilderson
University of California Santa Cruz
Santa Cruz, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,490
18,808
0.373
applied isotope geochemistry
carbon cycle
natural climate variability
George Gehrels
University of Arizona
Tucson, United States
![United States](/flags/us.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,229
21,398
0.426
Eric Rignot
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
50,053
22,129
0.442
Cryosphere
Greenland
Antarctica
Glaciology
Polar Science
Yong-Fei Zheng 郑永飞|Zheng Yongfei, Zheng YF
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,100
19,200
0.399
Plate tectonics
Convergent margin
Subduction zone
Collisional orogen
Chemical geodynamics
Roger Powell
University of Melbourne
Melbourne, Australia
![Australia](/flags/au.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,828
15,893
0.332