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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 Sep 02, 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 (1.122.044) 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
4,023
World Rank
18
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-Index126
-
i10 Index298
-
Citation Counts148,581
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* Total H Index Rankings
Rankings
5,419
World Rank
21
Country Rank
2
University
Ranking Based On Selection:
2
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-Index117
-
i10 Index312
-
Citation Counts55,388
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* Total H Index Rankings
Rankings
5,770
World Rank
23
Country Rank
3
University
Ranking Based On Selection:
3
Engineering & Technology / Civil Engineering
Hydrology | Groundwater | Environment | Agriculture | Systems Scienc
Hydrology | Groundwater | Environment | Agriculture | Systems Scienc
H-Index Metrics
-
H-Index115
-
i10 Index225
-
Citation Counts53,560
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* Total H Index Rankings
Rankings
8,805
World Rank
41
Country Rank
4
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
13,421
World Rank
72
Country Rank
5
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
20,209
World Rank
96
Country Rank
6
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
20,216
World Rank
97
Country Rank
7
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
27,489
World Rank
147
Country Rank
8
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
27,652
World Rank
149
Country Rank
9
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
31,132
World Rank
173
Country Rank
10
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
42,442
World Rank
235
Country Rank
11
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
48,540
World Rank
270
Country Rank
12
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
61,587
World Rank
345
Country Rank
13
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
68,466
World Rank
395
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-Index55
-
i10 Index132
-
Citation Counts12,251
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* Total H Index Rankings
Rankings
71,155
World Rank
411
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-Index54
-
i10 Index112
-
Citation Counts11,354
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* Total H Index Rankings
Rankings
74,529
World Rank
433
Country Rank
16
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
79,359
World Rank
462
Country Rank
17
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
92,108
World Rank
542
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-Index49
-
i10 Index95
-
Citation Counts14,693
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* Total H Index Rankings
Rankings
118,008
World Rank
681
Country Rank
19
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
125,578
World Rank
732
Country Rank
20
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
131,670
World Rank
765
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-Index42
-
i10 Index65
-
Citation Counts16,431
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* Total H Index Rankings
Rankings
139,047
World Rank
804
Country Rank
22
University
Ranking Based On Selection:
22
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 Index62
-
Citation Counts11,609
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* Total H Index Rankings
Rankings
139,493
World Rank
807
Country Rank
23
University
Ranking Based On Selection:
23
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-Index41
-
i10 Index56
-
Citation Counts10,401
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* Total H Index Rankings
Rankings
140,020
World Rank
812
Country Rank
24
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
147,323
World Rank
849
Country Rank
25
University
Ranking Based On Selection:
25
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-Index40
-
i10 Index88
-
Citation Counts5,746
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