Citation Rankings
Highly Cited Researchers
International Institute for Applied Systems Analysis Highly Cited Researchers Citation Rankings 2025
The Citation Rankings (Highly Cited Researchers) 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
climate change
energy economics
integrated assessment
technological change
sustainable development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
126,477
76,620
0.606
* Total Citation Counts Rankings
Ranking Based On Selection :2
Air quality
Climate
Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,759
32,916
0.560
* Total Citation Counts Rankings
Ranking Based On Selection :3
Biodiversity
Food Security
Sustainability
Environmental Economics
Land-Use Modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,659
32,313
0.664
* Total Citation Counts Rankings
Ranking Based On Selection :4
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,912
21,490
0.478
* Total Citation Counts Rankings
Ranking Based On Selection :5
Hydrology
Groundwater
Environment
Agriculture
Systems Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,611
35,481
0.795
* Total Citation Counts Rankings
Ranking Based On Selection :6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,140
32,727
0.777
* Total Citation Counts Rankings
Ranking Based On Selection :7
Demography
Population
Human Capital
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,758
14,412
0.501
* Total Citation Counts Rankings
Ranking Based On Selection :8
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,125
10,344
0.381
* Total Citation Counts Rankings
Ranking Based On Selection :9
energy demand
climate change mitigation
behavior change
agent-based modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,357
15,637
0.699
* Total Citation Counts Rankings
Ranking Based On Selection :10
land cover
food security
GIS
remote sensing
crowdsourcing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,996
13,846
0.629
* Total Citation Counts Rankings
Ranking Based On Selection :11
Land use
land cover
Earth Observation
citizen science
crowdsourcing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,358
13,668
0.640
* Total Citation Counts Rankings
Ranking Based On Selection :12
Biodiversity
conservation
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,006
4,528
0.251
* Total Citation Counts Rankings
Ranking Based On Selection :13
Socio-economics of risk management and climate adaptation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,931
11,401
0.636
* Total Citation Counts Rankings
Ranking Based On Selection :14
Energy economics
Energy and development
Energy Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,954
11,177
0.659
* Total Citation Counts Rankings
Ranking Based On Selection :15
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,228
14,876
0.917
* Total Citation Counts Rankings
Ranking Based On Selection :16
cultural theory
rubbish theory
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,115
3,556
0.221
* Total Citation Counts Rankings
Ranking Based On Selection :17
Earth system
Climate change
Carbon cycle
Land-use change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,981
14,502
0.907
* Total Citation Counts Rankings
Ranking Based On Selection :18
Conservation Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,247
11,973
0.785
* Total Citation Counts Rankings
Ranking Based On Selection :19
Integrated Assessment Modeling
Climate Change
Energy Demand
Macro Energy Systems
Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,499
8,428
0.674
* Total Citation Counts Rankings
Ranking Based On Selection :20
Mitigation of non-CO2 greenhouse gases
in particular methane
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,465
8,497
0.741
* Total Citation Counts Rankings
Ranking Based On Selection :21
air pollution
climate change
atmospheric science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,420
10,688
0.936
* Total Citation Counts Rankings
Ranking Based On Selection :22
Population Projections and Statistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,865
7,964
0.733
* Total Citation Counts Rankings
Ranking Based On Selection :23
Energy Economics
Air Pollution
Fluorinated Greenhouse Gases
Climate Change Mitigation
Short-lived Climate Forcers (SLCPs)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,779
7,235
0.671
* Total Citation Counts Rankings
Ranking Based On Selection :24
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,332
7,180
0.695
* Total Citation Counts Rankings
Ranking Based On Selection :25
water-energy nexus
climate impacts
infrastructure systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,111
9,697
0.959
* Total Citation Counts Rankings
Rankings
1,981
9
1
Ranking Based On Selection: 1
Keywan Riahi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
126,477
76,620
0.606
climate change
energy economics
integrated assessment
technological change
sustainable development
* Total Citation Counts Rankings
Rankings
7,747
31
2
Ranking Based On Selection: 2
Zbigniew Klimont
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,759
32,916
0.560
Air quality
Climate
Energy
* Total Citation Counts Rankings
Rankings
10,463
45
3
Ranking Based On Selection: 3
Michael Obersteiner
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48,659
32,313
0.664
Biodiversity
Food Security
Sustainability
Environmental Economics
Land-Use Modeling
* Total Citation Counts Rankings
Rankings
11,883
51
4
Ranking Based On Selection: 4
Markus Amann
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,912
21,490
0.478
* Total Citation Counts Rankings
Rankings
12,019
52
5
Ranking Based On Selection: 5
Yoshihide Wada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,611
35,481
0.795
Hydrology
Groundwater
Environment
Agriculture
Systems Science
* Total Citation Counts Rankings
Rankings
13,177
60
6
Ranking Based On Selection: 6
Petr Havlik
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,140
32,727
0.777
* Total Citation Counts Rankings
Rankings
24,040
116
7
Ranking Based On Selection: 7
Wolfgang Lutz
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,758
14,412
0.501
* Total Citation Counts Rankings
Rankings
26,218
131
8
Ranking Based On Selection: 8
Pavel Kabat
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,125
10,344
0.381
* Total Citation Counts Rankings
Rankings
34,794
183
9
Ranking Based On Selection: 9
Leila Niamir
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,357
15,637
0.699
energy demand
climate change mitigation
behavior change
agent-based modelling
* Total Citation Counts Rankings
Rankings
35,616
185
10
Ranking Based On Selection: 10
Steffen Fritz
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,996
13,846
0.629
* Total Citation Counts Rankings
Rankings
37,145
188
11
Ranking Based On Selection: 11
Linda See
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,358
13,668
0.640
Land use
land cover
Earth Observation
citizen science
crowdsourcing
* Total Citation Counts Rankings
Rankings
46,995
252
12
Ranking Based On Selection: 12
Albert Van Jaarsveld
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,006
4,528
0.251
* Total Citation Counts Rankings
Rankings
47,253
254
13
Ranking Based On Selection: 13
Reinhard Mechler
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,931
11,401
0.636
Socio-economics of risk management and climate adaptation
* Total Citation Counts Rankings
Rankings
50,985
280
14
Ranking Based On Selection: 14
Shonali Pachauri
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,954
11,177
0.659
Energy economics
Energy and development
Energy Policy
* Total Citation Counts Rankings
Rankings
54,073
297
15
Ranking Based On Selection: 15
Oliver Fricko
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,228
14,876
0.917
* Total Citation Counts Rankings
Rankings
54,594
303
16
Ranking Based On Selection: 16
Michael Thompson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,115
3,556
0.221
* Total Citation Counts Rankings
Rankings
55,216
308
17
Ranking Based On Selection: 17
Thomas Gasser
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,981
14,502
0.907
Earth system
Climate change
Carbon cycle
Land-use change
* Total Citation Counts Rankings
Rankings
58,712
332
18
Ranking Based On Selection: 18
Piero Visconti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,247
11,973
0.785
* Total Citation Counts Rankings
Rankings
75,937
422
19
Ranking Based On Selection: 19
Bas J. Van Ruijven
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,499
8,428
0.674
Integrated Assessment Modeling
Climate Change
Energy Demand
Macro Energy Systems
Energy
* Total Citation Counts Rankings
Rankings
84,311
481
20
Ranking Based On Selection: 20
Lena Höglund Isaksson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,465
8,497
0.741
* Total Citation Counts Rankings
Rankings
84,681
483
21
Ranking Based On Selection: 21
Gregor Kiesewetter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,420
10,688
0.936
air pollution
climate change
atmospheric science
* Total Citation Counts Rankings
Rankings
89,936
515
22
Ranking Based On Selection: 22
Samir KC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,865
7,964
0.733
* Total Citation Counts Rankings
Rankings
90,804
522
23
Ranking Based On Selection: 23
Pallav Purohit
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,779
7,235
0.671
Energy Economics
Air Pollution
Fluorinated Greenhouse Gases
Climate Change Mitigation
Short-lived Climate Forcers (SLCPs)
* Total Citation Counts Rankings
Rankings
95,377
558
24
Ranking Based On Selection: 24
Fabian Wagner
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,332
7,180
0.695
* Total Citation Counts Rankings
Rankings
97,810
565
25
Ranking Based On Selection: 25
Edward Byers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,111
9,697
0.959