Subject Rankings

International Institute for Applied Systems Analysis Subject Rankings 2025

Agriculture and Forestry, Architecture and Design, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings along with their 197 sub-branches, can be analyzed at global, national, and regional levels. You can also evaluate them based on the i10 index and citation numbersAs of Sep 18, 2024, rankings are according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in beta. This is due to the exclusion of (1.014.193) scientists categorized under 'others,' whose profiles cannot yet be determined, edited, or classified. As these fields are updated, the rankings will adjust accordingly. Please keep this in mind. See Also: [University Subject Rankings]

* Total H IndexRankings
Ranking Based On Selection :1
Keywan Riahi
climate change
energy economics
integrated assessment
technological change
sustainable development
Metrics
H-Index
i10 Index
Citation Counts
120
287
124,085
* Total H IndexRankings
Ranking Based On Selection :2
Michael Obersteiner
Biodiversity
Food Security
Sustainability
Environmental Economics
Land-Use Modeling
Metrics
H-Index
i10 Index
Citation Counts
109
287
47,362
* Total H IndexRankings
Ranking Based On Selection :3
Yoshihide Wada
Hydrology
Groundwater
Environment
Agriculture
Systems Science
Metrics
H-Index
i10 Index
Citation Counts
103
207
43,308
* Total H IndexRankings
Ranking Based On Selection :7
Steffen Fritz
land cover
food security
GIS
remote sensing
crowdsourcing
Metrics
H-Index
i10 Index
Citation Counts
77
181
21,374
* Total H IndexRankings
Ranking Based On Selection :10
Wolfgang Lutz
Demography
Population
Human Capital
Metrics
H-Index
i10 Index
Citation Counts
70
221
27,678
* Total H IndexRankings
Ranking Based On Selection :11
Shonali Pachauri
Energy economics
Energy and development
Energy Policy
Metrics
H-Index
i10 Index
Citation Counts
59
107
16,427
* Total H IndexRankings
Ranking Based On Selection :12
Reinhard Mechler
Socio-economics of risk management and climate adaptation
Metrics
H-Index
i10 Index
Citation Counts
59
143
17,468
* Total H IndexRankings
Ranking Based On Selection :13
Michael Thompson
cultural theory
rubbish theory
Metrics
H-Index
i10 Index
Citation Counts
54
127
15,948
* Total H IndexRankings
Ranking Based On Selection :14
Piero Visconti
Conservation Biology
Metrics
H-Index
i10 Index
Citation Counts
53
86
14,747
* Total H IndexRankings
Ranking Based On Selection :15
Pallav Purohit
Energy Economics
Air Pollution
Fluorinated Greenhouse Gases
Climate Change Mitigation
Short-lived Climate Forcers (SLCPs)
Metrics
H-Index
i10 Index
Citation Counts
52
124
10,534
* Total H IndexRankings
Ranking Based On Selection :17
Jinfeng Chang
Grassland management
Climate change
Agriculture
Biogeochemical cycle
Land-use change
Metrics
H-Index
i10 Index
Citation Counts
46
87
8,127
* Total H IndexRankings
Ranking Based On Selection :18
Bas J. Van Ruijven
Integrated Assessment Modeling
Climate Change
Energy Demand
Macro Energy Systems
Energy
Metrics
H-Index
i10 Index
Citation Counts
46
75
12,130
* Total H IndexRankings
Ranking Based On Selection :19
Albert Van Jaarsveld
Biodiversity
conservation
climate change
Metrics
H-Index
i10 Index
Citation Counts
45
90
17,869
* Total H IndexRankings
Ranking Based On Selection :21
Sergei Scherbov
formal demography
aging
population forecasting
demography
Metrics
H-Index
i10 Index
Citation Counts
39
103
9,871
* Total H IndexRankings
Ranking Based On Selection :22
Stefan Frank
Land-use Modelling
Climate Change Mitigation
Food Security
Sustainable Development
Metrics
H-Index
i10 Index
Citation Counts
38
52
9,165
* Total H IndexRankings
Ranking Based On Selection :24
Peter Burek
Hydrology
Hydrological Modelling
Water Cycle
Metrics
H-Index
i10 Index
Citation Counts
37
51
6,714
* Total H IndexRankings
Ranking Based On Selection :25
Lena Höglund Isaksson
Mitigation of non-CO2 greenhouse gases
in particular methane
Metrics
H-Index
i10 Index
Citation Counts
37
65
11,174
* Total H Index Rankings
Rankings
Ranking Based On Selection: 1
Keywan Riahi
Metrics
H-Index
i10-Index
Citation Counts
120
287
124,085
climate change
energy economics
integrated assessment
technological change
sustainable development
* Total H Index Rankings
Rankings
Ranking Based On Selection: 2
Michael Obersteiner
Metrics
H-Index
i10-Index
Citation Counts
109
287
47,362
Biodiversity
Food Security
Sustainability
Environmental Economics
Land-Use Modeling
* Total H Index Rankings
Rankings
Ranking Based On Selection: 3
Yoshihide Wada
Metrics
H-Index
i10-Index
Citation Counts
103
207
43,308
Hydrology
Groundwater
Environment
Agriculture
Systems Science
* Total H Index Rankings
Rankings
Ranking Based On Selection: 4
Petr Havlik
Metrics
H-Index
i10-Index
Citation Counts
95
195
40,855
* Total H Index Rankings
Rankings
Ranking Based On Selection: 5
Zbigniew Klimont
Metrics
H-Index
i10-Index
Citation Counts
89
224
57,684
* Total H Index Rankings
Rankings
Ranking Based On Selection: 6
Linda See
Metrics
H-Index
i10-Index
Citation Counts
78
219
20,937
* Total H Index Rankings
Rankings
Ranking Based On Selection: 7
Steffen Fritz
Metrics
H-Index
i10-Index
Citation Counts
77
181
21,374
land cover
food security
GIS
remote sensing
crowdsourcing
* Total H Index Rankings
Rankings
Ranking Based On Selection: 8
Markus Amann
Metrics
H-Index
i10-Index
Citation Counts
74
204
44,304
* Total H Index Rankings
Rankings
Ranking Based On Selection: 9
Pavel Kabat
Metrics
H-Index
i10-Index
Citation Counts
73
151
26,844
* Total H Index Rankings
Rankings
Ranking Based On Selection: 10
Wolfgang Lutz
Metrics
H-Index
i10-Index
Citation Counts
70
221
27,678
* Total H Index Rankings
Rankings
Ranking Based On Selection: 11
Shonali Pachauri
Metrics
H-Index
i10-Index
Citation Counts
59
107
16,427
Energy economics
Energy and development
Energy Policy
* Total H Index Rankings
Rankings
Ranking Based On Selection: 12
Reinhard Mechler
Metrics
H-Index
i10-Index
Citation Counts
59
143
17,468
Socio-economics of risk management and climate adaptation
* Total H Index Rankings
Rankings
Ranking Based On Selection: 13
Michael Thompson
Metrics
H-Index
i10-Index
Citation Counts
54
127
15,948
cultural theory
rubbish theory
* Total H Index Rankings
Rankings
Ranking Based On Selection: 14
Piero Visconti
Metrics
H-Index
i10-Index
Citation Counts
53
86
14,747
* Total H Index Rankings
Rankings
Ranking Based On Selection: 15
Pallav Purohit
Metrics
H-Index
i10-Index
Citation Counts
52
124
10,534
Energy Economics
Air Pollution
Fluorinated Greenhouse Gases
Climate Change Mitigation
Short-lived Climate Forcers (SLCPs)
* Total H Index Rankings
Rankings
Ranking Based On Selection: 16
Fabian Wagner
Metrics
H-Index
i10-Index
Citation Counts
48
113
9,957
* Total H Index Rankings
Rankings
Ranking Based On Selection: 17
Jinfeng Chang
Metrics
H-Index
i10-Index
Citation Counts
46
87
8,127
Grassland management
Climate change
Agriculture
Biogeochemical cycle
Land-use change
* Total H Index Rankings
Rankings
Ranking Based On Selection: 18
Bas J. Van Ruijven
Metrics
H-Index
i10-Index
Citation Counts
46
75
12,130
Integrated Assessment Modeling
Climate Change
Energy Demand
Macro Energy Systems
Energy
* Total H Index Rankings
Rankings
Ranking Based On Selection: 19
Albert Van Jaarsveld
Metrics
H-Index
i10-Index
Citation Counts
45
90
17,869
Biodiversity
conservation
climate change
* Total H Index Rankings
Rankings
Ranking Based On Selection: 20
Stefan Hochrainer-Stigler
Metrics
H-Index
i10-Index
Citation Counts
39
101
6,530
* Total H Index Rankings
Rankings
Ranking Based On Selection: 21
Sergei Scherbov
Metrics
H-Index
i10-Index
Citation Counts
39
103
9,871
formal demography
aging
population forecasting
demography
* Total H Index Rankings
Rankings
Ranking Based On Selection: 22
Stefan Frank
Metrics
H-Index
i10-Index
Citation Counts
38
52
9,165
Land-use Modelling
Climate Change Mitigation
Food Security
Sustainable Development
* Total H Index Rankings
Rankings
Ranking Based On Selection: 23
Oliver Fricko
Metrics
H-Index
i10-Index
Citation Counts
37
49
15,636
* Total H Index Rankings
Rankings
Ranking Based On Selection: 24
Peter Burek
Metrics
H-Index
i10-Index
Citation Counts
37
51
6,714
* Total H Index Rankings
Rankings
Ranking Based On Selection: 25
Lena Höglund Isaksson
Metrics
H-Index
i10-Index
Citation Counts
37
65
11,174
Mitigation of non-CO2 greenhouse gases
in particular methane