Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 276 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
High Energy Physics
Astrophysics
Quantum Field Theory
Elementary Particle Physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,707
22,307
0.510
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Mycology
Systematics
Evolutionary Biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,359
13,730
0.358
* Total Citation Counts Rankings
Ranking Based On Selection: 3
governance
extractive industry
development geography
socio-environmental conflicts
political ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,920
9,780
0.297
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Narrative
Narrative Analysis
Identity
Positioning
Narrative Criminolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,580
11,506
0.433
* Total Citation Counts Rankings
Ranking Based On Selection: 5
environmental sociology
natural resources valuation
contingent valuation
social movements
african independent religious move
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,438
2,853
0.140
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Geographic Information Science (GIS)
Land Change Science
Modelling
Statistic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,440
7,603
0.391
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,492
3,538
0.191
* Total Citation Counts Rankings
Ranking Based On Selection: 8
education
classroom discourse
academically productive tal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,254
6,014
0.329
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Terrestrial Ecosystem Ecology
Land Surface Hydrology
Ecosystem-Climate Interactions
Globa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,223
9,377
0.544
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Geographic Information Systems
Remote Sensing
Land Change Science
Conservation GI
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,397
4,113
0.251
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,488
7,531
0.558
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Geography
Ecology
Land use
cultural and political ecology
urban ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,962
9,785
0.755
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Environmental and Natural Resource Economic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,357
5,085
0.412
* Total Citation Counts Rankings
Ranking Based On Selection: 14
land change
fire
classification trees
random forests
urban forest assessmen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,319
6,354
0.516
* Total Citation Counts Rankings
Ranking Based On Selection: 15
clinical psycholog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,543
6,029
0.572
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Environmental politics
political economy
political ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,172
3,484
0.343
* Total Citation Counts Rankings
Ranking Based On Selection: 17
environmental economics
productivity
regulatory economic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,841
2,914
0.296
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Climate and Global Environmental Change
Polar Climate Change
Cryospheric Responses and Feedback
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,373
3,910
0.417
* Total Citation Counts Rankings
Ranking Based On Selection: 19
environment
spatial analysis
geographical information science
GIS
risk and hazard
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,176
2,553
0.278
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,761
2,371
0.271
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Policy analysis
climate change
scenarios
air quality and energy
social system
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,805
6,425
0.823
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,791
1,821
0.234
* Total Citation Counts Rankings
Ranking Based On Selection: 23
urban geography
qualitative methods
political geograph
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,090
3,006
0.424
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Culture
Developmental Psychology
Morality
Globalizatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,822
2,257
0.331
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Probiotics & Postbiotics
Prostate Cancer Biology
Bioremediation of Radionuclides
Metabolic Engineering
Systems Biotechnol
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,788
3,283
0.484
* Total Citation Counts Rankings
Rankings
13,378
6,278
1
Ranking Based On Selection: 1
George Japaridze
Clark Atlanta University
Atlanta, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,707
22,307
0.510
High Energy Physics
Astrophysics
Quantum Field Theory
Elementary Particle Physic
* Total Citation Counts Rankings
Rankings
16,493
7,695
1
Ranking Based On Selection: 2
David Hibbett
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,359
13,730
0.358
Mycology
Systematics
Evolutionary Biolog
* Total Citation Counts Rankings
Rankings
20,888
9,597
2
Ranking Based On Selection: 3
Anthony Bebbington
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,920
9,780
0.297
governance
extractive industry
development geography
socio-environmental conflicts
political ecolog
* Total Citation Counts Rankings
Rankings
28,928
13,074
3
Ranking Based On Selection: 4
Michael Bamberg
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,580
11,506
0.433
Narrative
Narrative Analysis
Identity
Positioning
Narrative Criminolog
* Total Citation Counts Rankings
Rankings
42,159
18,446
4
Ranking Based On Selection: 5
Robert Cameron Mitchell
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,438
2,853
0.140
environmental sociology
natural resources valuation
contingent valuation
social movements
african independent religious move
* Total Citation Counts Rankings
Rankings
45,100
19,595
5
Ranking Based On Selection: 6
Robert Gilmore Pontius Jr
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,440
7,603
0.391
Geographic Information Science (GIS)
Land Change Science
Modelling
Statistic
* Total Citation Counts Rankings
Rankings
48,361
20,870
6
Ranking Based On Selection: 7
Richard Peet
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,492
3,538
0.191
* Total Citation Counts Rankings
Rankings
49,229
21,229
7
Ranking Based On Selection: 8
Sarah Michaels
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,254
6,014
0.329
education
classroom discourse
academically productive tal
* Total Citation Counts Rankings
Rankings
53,145
22,744
8
Ranking Based On Selection: 9
Christopher A Williams
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,223
9,377
0.544
Terrestrial Ecosystem Ecology
Land Surface Hydrology
Ecosystem-Climate Interactions
Globa
* Total Citation Counts Rankings
Rankings
56,791
24,132
9
Ranking Based On Selection: 10
J Ronald Eastman
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,397
4,113
0.251
Geographic Information Systems
Remote Sensing
Land Change Science
Conservation GI
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Total Citation Counts Rankings
Rankings
73,260
30,233
10
Ranking Based On Selection: 11
Abbie E Goldberg
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,488
7,531
0.558
* Total Citation Counts Rankings
Rankings
77,008
31,571
11
Ranking Based On Selection: 12
Rinku Roy Chowdhury
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,962
9,785
0.755
Geography
Ecology
Land use
cultural and political ecology
urban ecolog
* Total Citation Counts Rankings
Rankings
81,539
33,189
12
Ranking Based On Selection: 13
Robert J Johnston
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,357
5,085
0.412
Environmental and Natural Resource Economic
* Total Citation Counts Rankings
Rankings
81,879
33,299
13
Ranking Based On Selection: 14
John Rogan
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,319
6,354
0.516
land change
fire
classification trees
random forests
urban forest assessmen
* Total Citation Counts Rankings
Rankings
98,612
39,212
14
Ranking Based On Selection: 15
Douglas Gazarian
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,543
6,029
0.572
* Total Citation Counts Rankings
Rankings
102,829
40,642
15
Ranking Based On Selection: 16
James Mccarthy
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,172
3,484
0.343
Environmental politics
political economy
political ecolog
* Total Citation Counts Rankings
Rankings
106,711
41,992
16
Ranking Based On Selection: 17
Wayne Gray
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,841
2,914
0.296
environmental economics
productivity
regulatory economic
* Total Citation Counts Rankings
Rankings
112,827
44,123
17
Ranking Based On Selection: 18
Karen E Frey
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,373
3,910
0.417
Climate and Global Environmental Change
Polar Climate Change
Cryospheric Responses and Feedback
* Total Citation Counts Rankings
Rankings
115,644
45,071
18
Ranking Based On Selection: 19
Samuel Ratick
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,176
2,553
0.278
environment
spatial analysis
geographical information science
GIS
risk and hazard
* Total Citation Counts Rankings
Rankings
121,771
47,040
19
Ranking Based On Selection: 20
Kate Bielaczyc
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,761
2,371
0.271
* Total Citation Counts Rankings
Rankings
138,307
52,485
20
Ranking Based On Selection: 21
Elisabeth Gilmore
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,805
6,425
0.823
Policy analysis
climate change
scenarios
air quality and energy
social system
* Total Citation Counts Rankings
Rankings
138,595
52,576
21
Ranking Based On Selection: 22
Arshad Kudrolli
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,791
1,821
0.234
* Total Citation Counts Rankings
Rankings
153,184
57,224
22
Ranking Based On Selection: 23
Deborah G Martin
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,090
3,006
0.424
urban geography
qualitative methods
political geograph
* Total Citation Counts Rankings
Rankings
159,399
59,160
23
Ranking Based On Selection: 24
Lene Arnett Jensen
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,822
2,257
0.331
Culture
Developmental Psychology
Morality
Globalizatio
* Total Citation Counts Rankings
Rankings
160,248
59,414
2
Ranking Based On Selection: 25
Hyun D Shin
Clark Atlanta University
Atlanta, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,788
3,283
0.484
Probiotics & Postbiotics
Prostate Cancer Biology
Bioremediation of Radionuclides
Metabolic Engineering
Systems Biotechnol