University, Subject, Country, Region, World
International Institute for Applied Systems Analysis 130 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 Jan 28, 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 (873.688) 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: 26
Demography
Education
Religion
Metrics
H-Index
i10 Index
Citation Counts
38
86
5,931
* Total H IndexRankings
Ranking Based On Selection: 27
Earth system
Climate change
Carbon cycle
Land-use change
Metrics
H-Index
i10 Index
Citation Counts
37
61
17,359
* Total H IndexRankings
Ranking Based On Selection: 28
Hydrology
Hydrological Modelling
Water Cycle
Metrics
H-Index
i10 Index
Citation Counts
37
52
7,298
* Total H IndexRankings
Ranking Based On Selection: 29
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: 30
Energy Storage
Hydropower
Climate Change
Renewable Energies
Water Management
Metrics
H-Index
i10 Index
Citation Counts
36
79
4,828
* Total H IndexRankings
Ranking Based On Selection: 31
air pollution
energy modelling
climate
Metrics
H-Index
i10 Index
Citation Counts
36
68
10,488
* Total H IndexRankings
Ranking Based On Selection: 32
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: 33
Metrics
H-Index
i10 Index
Citation Counts
35
71
5,186
* Total H IndexRankings
Ranking Based On Selection: 34
Energy Storage
Energy Systems Analysis
Data Aanalytics and Energy Transitions
Economics of
Metrics
H-Index
i10 Index
Citation Counts
35
58
6,365
* Total H IndexRankings
Ranking Based On Selection: 35
air pollution
climate change
atmospheric science
Metrics
H-Index
i10 Index
Citation Counts
35
54
12,473
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* Total H IndexRankings
Ranking Based On Selection: 36
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: 37
Vehicle emissions
remote sensing
sustainable mobility
Metrics
H-Index
i10 Index
Citation Counts
34
56
5,613
* Total H IndexRankings
Ranking Based On Selection: 38
energy economics
sustainable development
integrated assessment
optimization and equilibrium
Metrics
H-Index
i10 Index
Citation Counts
32
46
8,387
* Total H IndexRankings
Ranking Based On Selection: 39
Agricultural economics
Land use change
Partial equilibrium model
Deforestation
REDD+
Metrics
H-Index
i10 Index
Citation Counts
32
46
7,387
* Total H IndexRankings
Ranking Based On Selection: 40
Metrics
H-Index
i10 Index
Citation Counts
31
46
4,203
* Total H IndexRankings
Ranking Based On Selection: 41
Metrics
H-Index
i10 Index
Citation Counts
30
39
5,363
* Total H IndexRankings
Ranking Based On Selection: 42
ecology
forest
modeling
soil
Metrics
H-Index
i10 Index
Citation Counts
30
44
4,522
* Total H IndexRankings
Ranking Based On Selection: 43
Integrated environmental modelling
Metrics
H-Index
i10 Index
Citation Counts
30
52
4,210
* Total H IndexRankings
Ranking Based On Selection: 44
Metrics
H-Index
i10 Index
Citation Counts
29
43
6,171
* Total H IndexRankings
Ranking Based On Selection: 45
Population Projections and Statistics
Metrics
H-Index
i10 Index
Citation Counts
29
49
11,482
* Total H IndexRankings
Ranking Based On Selection: 46
Geosciences
Metrics
H-Index
i10 Index
Citation Counts
28
37
7,359
* Total H IndexRankings
Ranking Based On Selection: 47
Biodiversity
Ecology
Plant functional traits
Metrics
H-Index
i10 Index
Citation Counts
28
41
4,424
* Total H IndexRankings
Ranking Based On Selection: 48
Energy Systems Modeling
Spatial Modeling
Low Carbon Transitions
Emerging Energy Technologies
Metrics
H-Index
i10 Index
Citation Counts
28
34
4,732
* Total H IndexRankings
Ranking Based On Selection: 49
mathematical modeling
optimization
multiple-criteria analysis
Metrics
H-Index
i10 Index
Citation Counts
27
71
2,993
* Total H IndexRankings
Ranking Based On Selection: 50
Metrics
H-Index
i10 Index
Citation Counts
26
31
2,998
Anne Goujon
Metrics
H-Index
i10-Index
Citation Counts
38
86
5,931
Thomas Gasser
Metrics
H-Index
i10-Index
Citation Counts
37
61
17,359
Earth system
Climate change
Carbon cycle
Land-use change
Peter Burek
Metrics
H-Index
i10-Index
Citation Counts
37
52
7,298
Hydrology
Hydrological Modelling
Water Cycle
Edward Byers
Metrics
H-Index
i10-Index
Citation Counts
37
57
10,819
Julian David Hunt
Metrics
H-Index
i10-Index
Citation Counts
36
79
4,828
Energy Storage
Hydropower
Climate Change
Renewable Energies
Water Management
Peter Rafaj
Metrics
H-Index
i10-Index
Citation Counts
36
68
10,488
air pollution
energy modelling
climate
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
Behnam Zakeri
Metrics
H-Index
i10-Index
Citation Counts
35
58
6,365
Energy Storage
Energy Systems Analysis
Data Aanalytics and Energy Transitions
Economics of
Gregor Kiesewetter
Metrics
H-Index
i10-Index
Citation Counts
35
54
12,473
air pollution
climate change
atmospheric science
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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
Daniel Huppmann
Metrics
H-Index
i10-Index
Citation Counts
32
46
8,387
energy economics
sustainable development
integrated assessment
optimization and equilibrium
Aline Mosnier
Metrics
H-Index
i10-Index
Citation Counts
32
46
7,387
Agricultural economics
Land use change
Partial equilibrium model
Deforestation
REDD+
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
Oskar Franklin
Metrics
H-Index
i10-Index
Citation Counts
30
44
4,522
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
Peter Greve
Metrics
H-Index
i10-Index
Citation Counts
28
37
7,359
Florian Hofhansl
Metrics
H-Index
i10-Index
Citation Counts
28
41
4,424
Biodiversity
Ecology
Plant functional traits
Nils Johnson
Metrics
H-Index
i10-Index
Citation Counts
28
34
4,732
Energy Systems Modeling
Spatial Modeling
Low Carbon Transitions
Emerging Energy Technologies
Marek Makowski
Metrics
H-Index
i10-Index
Citation Counts
27
71
2,993
mathematical modeling
optimization
multiple-criteria analysis
Alessio Mastrucci
Metrics
H-Index
i10-Index
Citation Counts
26
31
2,998