University, Subject, Country, Region, World
International Institute for Applied Systems Analysis 65 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Feb 03, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (870.057) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Metrics
H-Index
i10 Index
Citation Counts
97
202
44,436
* Total H IndexRankings
Ranking Based On Selection: 2
Land use
land cover
Earth Observation
citizen science
crowdsourcing
Metrics
H-Index
i10 Index
Citation Counts
80
226
22,133
* Total H IndexRankings
Ranking Based On Selection: 3
land cover
food security
GIS
remote sensing
crowdsourcing
Metrics
H-Index
i10 Index
Citation Counts
80
185
22,916
* Total H IndexRankings
Ranking Based On Selection: 4
Metrics
H-Index
i10 Index
Citation Counts
75
204
45,906
* Total H IndexRankings
Ranking Based On Selection: 5
Metrics
H-Index
i10 Index
Citation Counts
74
153
27,619
* Total H IndexRankings
Ranking Based On Selection: 6
Conservation Biology
Metrics
H-Index
i10 Index
Citation Counts
55
88
16,064
* Total H IndexRankings
Ranking Based On Selection: 7
cultural theory
rubbish theory
Metrics
H-Index
i10 Index
Citation Counts
54
128
16,252
* Total H IndexRankings
Ranking Based On Selection: 8
Metrics
H-Index
i10 Index
Citation Counts
50
103
10,592
* Total H IndexRankings
Ranking Based On Selection: 9
Biodiversity
conservation
climate change
Metrics
H-Index
i10 Index
Citation Counts
45
91
18,223
* Total H IndexRankings
Ranking Based On Selection: 10
Metrics
H-Index
i10 Index
Citation Counts
40
104
6,976
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* Total H IndexRankings
Ranking Based On Selection: 11
formal demography
aging
population forecasting
demography
Metrics
H-Index
i10 Index
Citation Counts
39
105
10,157
* Total H IndexRankings
Ranking Based On Selection: 12
Metrics
H-Index
i10 Index
Citation Counts
38
50
17,260
* Total H IndexRankings
Ranking Based On Selection: 13
Mitigation of non-CO2 greenhouse gases
in particular methane
Metrics
H-Index
i10 Index
Citation Counts
38
67
12,014
* Total H IndexRankings
Ranking Based On Selection: 14
Metrics
H-Index
i10 Index
Citation Counts
38
63
5,880
* Total H IndexRankings
Ranking Based On Selection: 15
water-energy nexus
climate impacts
infrastructure systems
Metrics
H-Index
i10 Index
Citation Counts
37
57
10,819
* Total H IndexRankings
Ranking Based On Selection: 16
Integrated Assessment Modeling
Energy Systems
Sustainable Development
Carbon Dioxide Removal
Metrics
H-Index
i10 Index
Citation Counts
35
57
9,353
* Total H IndexRankings
Ranking Based On Selection: 17
Metrics
H-Index
i10 Index
Citation Counts
35
71
5,186
* Total H IndexRankings
Ranking Based On Selection: 18
environmental monitoring
mathematical modeling
remote sensing
land cover/land use
Metrics
H-Index
i10 Index
Citation Counts
35
49
5,055
* Total H IndexRankings
Ranking Based On Selection: 19
Vehicle emissions
remote sensing
sustainable mobility
Metrics
H-Index
i10 Index
Citation Counts
34
56
5,613
* Total H IndexRankings
Ranking Based On Selection: 20
Metrics
H-Index
i10 Index
Citation Counts
31
46
4,203
* Total H IndexRankings
Ranking Based On Selection: 21
Metrics
H-Index
i10 Index
Citation Counts
30
39
5,363
* Total H IndexRankings
Ranking Based On Selection: 22
Integrated environmental modelling
Metrics
H-Index
i10 Index
Citation Counts
30
52
4,210
* Total H IndexRankings
Ranking Based On Selection: 23
Metrics
H-Index
i10 Index
Citation Counts
29
43
6,171
* Total H IndexRankings
Ranking Based On Selection: 24
Population Projections and Statistics
Metrics
H-Index
i10 Index
Citation Counts
29
49
11,482
* Total H IndexRankings
Ranking Based On Selection: 25
Energy Systems Modeling
Spatial Modeling
Low Carbon Transitions
Emerging Energy Technologies
Metrics
H-Index
i10 Index
Citation Counts
28
34
4,732
Petr Havlik
Metrics
H-Index
i10-Index
Citation Counts
97
202
44,436
Linda See
Metrics
H-Index
i10-Index
Citation Counts
80
226
22,133
Land use
land cover
Earth Observation
citizen science
crowdsourcing
Steffen Fritz
Metrics
H-Index
i10-Index
Citation Counts
80
185
22,916
Markus Amann
Metrics
H-Index
i10-Index
Citation Counts
75
204
45,906
Pavel Kabat
Metrics
H-Index
i10-Index
Citation Counts
74
153
27,619
Piero Visconti
Metrics
H-Index
i10-Index
Citation Counts
55
88
16,064
Michael Thompson
Metrics
H-Index
i10-Index
Citation Counts
54
128
16,252
Fabian Wagner
Metrics
H-Index
i10-Index
Citation Counts
50
103
10,592
Albert Van Jaarsveld
Metrics
H-Index
i10-Index
Citation Counts
45
91
18,223
Stefan Hochrainer-Stigler
Metrics
H-Index
i10-Index
Citation Counts
40
104
6,976
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Sergei Scherbov
Metrics
H-Index
i10-Index
Citation Counts
39
105
10,157
Oliver Fricko
Metrics
H-Index
i10-Index
Citation Counts
38
50
17,260
Lena Höglund Isaksson
Metrics
H-Index
i10-Index
Citation Counts
38
67
12,014
Sylvain Leduc
Metrics
H-Index
i10-Index
Citation Counts
38
63
5,880
Edward Byers
Metrics
H-Index
i10-Index
Citation Counts
37
57
10,819
Matthew Gidden
Metrics
H-Index
i10-Index
Citation Counts
35
57
9,353
Integrated Assessment Modeling
Energy Systems
Sustainable Development
Carbon Dioxide Removal
Nicklas Forsell
Metrics
H-Index
i10-Index
Citation Counts
35
71
5,186
Myroslava Lesiv
Metrics
H-Index
i10-Index
Citation Counts
35
49
5,055
environmental monitoring
mathematical modeling
remote sensing
land cover/land use
Jens Borken-Kleefeld
Metrics
H-Index
i10-Index
Citation Counts
34
56
5,613
Geoff Clarke
Metrics
H-Index
i10-Index
Citation Counts
31
46
4,203
David Leclère
Metrics
H-Index
i10-Index
Citation Counts
30
39
5,363
Leen Hordijk
Metrics
H-Index
i10-Index
Citation Counts
30
52
4,210
Amanda Palazzo
Metrics
H-Index
i10-Index
Citation Counts
29
43
6,171
Samir KC
Metrics
H-Index
i10-Index
Citation Counts
29
49
11,482
Nils Johnson
Metrics
H-Index
i10-Index
Citation Counts
28
34
4,732
Energy Systems Modeling
Spatial Modeling
Low Carbon Transitions
Emerging Energy Technologies