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International Institute for Applied Systems Analysis 130 Scientists Subject Rankings
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 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 5 years. As of Jan 04, 2026, 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 (1.131.911) 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 Index Rankings
Rankings
3,953
World Rank
17
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
climate change | energy economics | integrated assessment | technological change | sustainable developmen
climate change | energy economics | integrated assessment | technological change | sustainable developmen
H-Index Metrics
-
H-Index129
-
i10 Index304
-
Citation Counts155,637
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* Total H Index Rankings
Rankings
5,219
World Rank
20
Country Rank
2
University
Ranking Based On Selection:
2
Engineering & Technology / Civil Engineering
Hydrology | Groundwater | Environment | Agriculture | Systems Scienc
Hydrology | Groundwater | Environment | Agriculture | Systems Scienc
H-Index Metrics
-
H-Index120
-
i10 Index232
-
Citation Counts57,929
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* Total H Index Rankings
Rankings
5,252
World Rank
21
Country Rank
3
University
Ranking Based On Selection:
3
Economics & Econometrics / Environmental Economics
Biodiversity | Food Security | Sustainability | Environmental Economics | Land-Use Modelin
Biodiversity | Food Security | Sustainability | Environmental Economics | Land-Use Modelin
H-Index Metrics
-
H-Index120
-
i10 Index321
-
Citation Counts58,822
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* Total H Index Rankings
Rankings
9,080
World Rank
42
Country Rank
4
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
12,339
World Rank
65
Country Rank
5
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
19,820
World Rank
93
Country Rank
6
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
20,665
World Rank
98
Country Rank
7
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
26,989
World Rank
141
Country Rank
8
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
28,033
World Rank
151
Country Rank
9
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
33,065
World Rank
184
Country Rank
10
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
39,229
World Rank
218
Country Rank
11
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
46,880
World Rank
257
Country Rank
12
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
56,443
World Rank
307
Country Rank
13
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
65,812
World Rank
370
Country Rank
14
University
Ranking Based On Selection:
14
Engineering & Technology / Meteorology & Atmospheric Sciences
Energy Economics | Air Pollution | Fluorinated Greenhouse Gases | Climate Change Mitigation | Short-lived Climate Forcers (SLCPs
Energy Economics | Air Pollution | Fluorinated Greenhouse Gases | Climate Change Mitigation | Short-lived Climate Forcers (SLCPs
H-Index Metrics
-
H-Index57
-
i10 Index135
-
Citation Counts13,067
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* Total H Index Rankings
Rankings
68,125
World Rank
387
Country Rank
15
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Grassland management | Climate change | Agriculture | Biogeochemical cycle | Land-use chang
Grassland management | Climate change | Agriculture | Biogeochemical cycle | Land-use chang
H-Index Metrics
-
H-Index56
-
i10 Index122
-
Citation Counts12,734
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* Total H Index Rankings
Rankings
78,733
World Rank
451
Country Rank
16
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
79,763
World Rank
462
Country Rank
17
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
92,266
World Rank
537
Country Rank
18
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Energy Demand | Integrated Assessment | Macro Energy Systems | Scenarios | Energy and Developmen
Energy Demand | Integrated Assessment | Macro Energy Systems | Scenarios | Energy and Developmen
H-Index Metrics
-
H-Index50
-
i10 Index100
-
Citation Counts15,767
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* Total H Index Rankings
Rankings
117,973
World Rank
683
Country Rank
19
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
118,763
World Rank
689
Country Rank
20
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
124,390
World Rank
724
Country Rank
21
University
Ranking Based On Selection:
21
Engineering & Technology / Earth Sciences
Earth system | Climate change | Carbon cycle | Land-use chang
Earth system | Climate change | Carbon cycle | Land-use chang
H-Index Metrics
-
H-Index44
-
i10 Index70
-
Citation Counts18,628
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* Total H Index Rankings
Rankings
126,025
World Rank
732
Country Rank
22
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
138,973
World Rank
805
Country Rank
23
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Energy Storage | Hydropower | Climate Change | Renewable Energies | Water Managemen
Energy Storage | Hydropower | Climate Change | Renewable Energies | Water Managemen
H-Index Metrics
-
H-Index42
-
i10 Index99
-
Citation Counts6,286
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* Total H Index Rankings
Rankings
139,142
World Rank
806
Country Rank
24
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Land-use Modelling | Climate Change Mitigation | Food Security | Sustainable Developmen
Land-use Modelling | Climate Change Mitigation | Food Security | Sustainable Developmen
H-Index Metrics
-
H-Index42
-
i10 Index56
-
Citation Counts11,203
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* Total H Index Rankings
Rankings
146,104
World Rank
849
Country Rank
25
University
Ranking Based On Selection:
25
Others
Carbon Dioxide Removal | Sustainable Development | Deep Decarbonization | Integrated Assessmen
Carbon Dioxide Removal | Sustainable Development | Deep Decarbonization | Integrated Assessmen
H-Index Metrics
-
H-Index41
-
i10 Index70
-
Citation Counts12,914
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