Citation Rankings
Highly Cited Researchers
Natural Sciences / Geography Highly Cited Researchers 777 Scientists Citation in United States Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Forest ecology
fire ecology
biogeography
disturbance ecology
geography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
71,256
17,985
0.252
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Remote Sensing
Environment
GIS
Land cover
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60,031
20,405
0.340
* Total Citation Counts Rankings
Ranking Based On Selection: 3
geography
sustainability
land change
anthropology
archaeology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,289
16,197
0.278
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Ecology
Landscape
Global Change
Land Use
Urban
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,256
22,021
0.447
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,718
27,607
0.579
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,310
22,555
0.498
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Land use and land cover change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,817
12,921
0.295
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Geopolitics
territorial politics
international political economy
territory
Italy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,027
9,245
0.243
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Remote sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,462
12,217
0.326
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Remote Sensing
fire
land use and land cover change
geography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,310
17,365
0.465
* Total Citation Counts Rankings
Ranking Based On Selection: 11
land use change
supply chain governance
sustainable agriculture
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,452
16,396
0.450
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Global Ecology
Anthropocene
Land use change
Landscape Ecology
Sustainable Land Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,959
21,569
0.600
* Total Citation Counts Rankings
Ranking Based On Selection: 13
physical geography
climatology
paleoclimatology
paleoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,883
9,277
0.259
* Total Citation Counts Rankings
Ranking Based On Selection: 14
race and ethnic groups
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,147
19,985
0.569
* Total Citation Counts Rankings
Ranking Based On Selection: 15
geographic information science
lidar
geovisualization
spatial cognition
navigation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,435
33,788
0.981
* Total Citation Counts Rankings
Ranking Based On Selection: 16
governance
extractive industry
development geography
socio-environmental conflicts
political ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,429
9,180
0.283
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Agriculture
Soils
Climate Change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,232
11,610
0.426
* Total Citation Counts Rankings
Ranking Based On Selection: 18
polar weather
polar climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,210
7,373
0.271
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Cartography
geographic information systems
urban modeling
geocomputation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,751
9,288
0.347
* Total Citation Counts Rankings
Ranking Based On Selection: 20
GIScience
visual analytics
cartography
spatial cognition
geovisualization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,654
4,522
0.183
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Remote Sensing
Terrestrial Carbon Cycle
Biodiversity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,366
10,586
0.434
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Paleoecology
Paleoclimatology
Global Climate Change
Open Data
Novel Ecosystems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,747
9,721
0.409
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,047
8,548
0.371
* Total Citation Counts Rankings
Ranking Based On Selection: 24
location modeling
GIScience
operations research
transportation
Regional Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,310
5,835
0.262
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Migration
housing
residential mobility
neighborhoods
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,180
5,393
0.243
* Total Citation Counts Rankings
Rankings
5,806
2,742
12
Ranking Based On Selection: 1
Veblen TT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
71,256
17,985
0.252
Forest ecology
fire ecology
biogeography
disturbance ecology
geography
* Total Citation Counts Rankings
Rankings
7,647
3,626
29
Ranking Based On Selection: 2
John Townshend
University of Maryland
College Park, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
60,031
20,405
0.340
Remote Sensing
Environment
GIS
Land cover
* Total Citation Counts Rankings
Rankings
8,021
3,812
33
Ranking Based On Selection: 3
Bl Turner II
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,289
16,197
0.278
geography
sustainability
land change
anthropology
archaeology
* Total Citation Counts Rankings
Rankings
10,504
4,988
31
Ranking Based On Selection: 4
Jiquan Chen
Michigan State University
East Lansing, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,256
22,021
0.447
Ecology
Landscape
Global Change
Land Use
Urban
* Total Citation Counts Rankings
Rankings
11,025
5,209
85
Ranking Based On Selection: 5
Karen C Seto
Yale University
New Haven, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,718
27,607
0.579
* Total Citation Counts Rankings
Rankings
11,964
5,674
41
Ranking Based On Selection: 6
Shunlin Liang
University of Maryland
College Park, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,310
22,555
0.498
* Total Citation Counts Rankings
Rankings
12,673
5,995
39
Ranking Based On Selection: 7
Emilio Moran
Michigan State University
East Lansing, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,817
12,921
0.295
* Total Citation Counts Rankings
Rankings
15,916
7,466
162
Ranking Based On Selection: 8
J Agnew
University of California Los Angeles
Los Angeles, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,027
9,245
0.243
Geopolitics
territorial politics
international political economy
territory
Italy
* Total Citation Counts Rankings
Rankings
16,289
7,635
58
Ranking Based On Selection: 9
Dar A Roberts
University of California Santa Barbara
Santa Barbara, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,462
12,217
0.326
* Total Citation Counts Rankings
Rankings
16,381
7,676
48
Ranking Based On Selection: 10
David P Roy
Michigan State University
East Lansing, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,310
17,365
0.465
Remote Sensing
fire
land use and land cover change
geography
* Total Citation Counts Rankings
Rankings
16,978
7,955
81
Ranking Based On Selection: 11
Holly Gibbs
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,452
16,396
0.450
land use change
supply chain governance
sustainable agriculture
* Total Citation Counts Rankings
Rankings
17,358
8,130
4
Ranking Based On Selection: 12
Erle C Ellis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,959
21,569
0.600
Global Ecology
Anthropocene
Land use change
Landscape Ecology
Sustainable Land Management
* Total Citation Counts Rankings
Rankings
17,426
8,151
22
Ranking Based On Selection: 13
Patrick J Bartlein
University of Oregon
Eugene, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,883
9,277
0.259
physical geography
climatology
paleoclimatology
paleoecology
* Total Citation Counts Rankings
Rankings
17,978
8,386
1
Ranking Based On Selection: 14
James P Allen
California State University Northridge
Northridge, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,147
19,985
0.569
* Total Citation Counts Rankings
Rankings
18,540
8,637
17
Ranking Based On Selection: 15
Thomas J Pingel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,435
33,788
0.981
geographic information science
lidar
geovisualization
spatial cognition
navigation
* Total Citation Counts Rankings
Rankings
20,356
9,418
2
Ranking Based On Selection: 16
Anthony Bebbington
Clark University
Worcester, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,429
9,180
0.283
governance
extractive industry
development geography
socio-environmental conflicts
political ecology
* Total Citation Counts Rankings
Rankings
26,588
12,158
103
Ranking Based On Selection: 17
Roberto Cesar Izaurralde
University of Maryland
College Park, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,232
11,610
0.426
* Total Citation Counts Rankings
Rankings
26,627
12,174
70
Ranking Based On Selection: 18
David Bromwich
Ohio State University
Columbus, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,210
7,373
0.271
* Total Citation Counts Rankings
Rankings
27,352
12,498
102
Ranking Based On Selection: 19
Keith C Clarke
University of California Santa Barbara
Santa Barbara, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,751
9,288
0.347
Cartography
geographic information systems
urban modeling
geocomputation
* Total Citation Counts Rankings
Rankings
30,903
13,989
137
Ranking Based On Selection: 20
Alan M Maceachren
Pennsylvania State University
University Park, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,654
4,522
0.183
GIScience
visual analytics
cartography
spatial cognition
geovisualization
* Total Citation Counts Rankings
Rankings
31,430
14,206
121
Ranking Based On Selection: 21
Ralph Dubayah
University of Maryland
College Park, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,366
10,586
0.434
Remote Sensing
Terrestrial Carbon Cycle
Biodiversity
* Total Citation Counts Rankings
Rankings
32,586
14,680
173
Ranking Based On Selection: 22
John Williams
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,747
9,721
0.409
Paleoecology
Paleoclimatology
Global Climate Change
Open Data
Novel Ecosystems
* Total Citation Counts Rankings
Rankings
33,988
15,262
352
Ranking Based On Selection: 23
Jeffrey Chambers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,047
8,548
0.371
* Total Citation Counts Rankings
Rankings
35,582
15,942
125
Ranking Based On Selection: 24
Rick Church Richard L Church
University of California Santa Barbara
Santa Barbara, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,310
5,835
0.262
location modeling
GIScience
operations research
transportation
Regional Science
* Total Citation Counts Rankings
Rankings
35,873
16,048
322
Ranking Based On Selection: 25
William Av Clark
University of California Los Angeles
Los Angeles, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,180
5,393
0.243
Migration
housing
residential mobility
neighborhoods