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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 02, 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 (1.131.752) 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
33,607
World Rank
101
Country Rank
3
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Environmetal Sciences | Marine Sciences | Ecotoxicology | Analytical Chemistry | Nanoparticle
Environmetal Sciences | Marine Sciences | Ecotoxicology | Analytical Chemistry | Nanoparticle
H-Index Metrics
-
H-Index72
-
i10 Index211
-
Citation Counts17,006
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* Total H Index Rankings
Rankings
44,292
World Rank
139
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Numerical Weather Prediction | Climate Modelling | Climate Change | Land-Atmosphere Interactio
Numerical Weather Prediction | Climate Modelling | Climate Change | Land-Atmosphere Interactio
H-Index Metrics
-
H-Index66
-
i10 Index101
-
Citation Counts27,473
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* Total H Index Rankings
Rankings
54,248
World Rank
169
Country Rank
2
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Seafood quality | safety | climate chang
Seafood quality | safety | climate chang
H-Index Metrics
-
H-Index61
-
i10 Index181
-
Citation Counts12,205
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* Total H Index Rankings
Rankings
62,510
World Rank
197
Country Rank
6
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Air pollution and Human biomonitoring | Sensors and biosensors | Green technologies | Health risk
Air pollution and Human biomonitoring | Sensors and biosensors | Green technologies | Health risk
H-Index Metrics
-
H-Index58
-
i10 Index178
-
Citation Counts11,026
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* Total H Index Rankings
Rankings
77,299
World Rank
247
Country Rank
32
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Coastal pollution | estuaries | toxicology | sedimentary environment
Coastal pollution | estuaries | toxicology | sedimentary environment
H-Index Metrics
-
H-Index54
-
i10 Index171
-
Citation Counts13,010
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* Total H Index Rankings
Rankings
92,386
World Rank
299
Country Rank
56
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Regional Climate Modelling | Climate Change | Clouds and Turbulence and Energy and Sustainable Developmen
Regional Climate Modelling | Climate Change | Clouds and Turbulence and Energy and Sustainable Developmen
H-Index Metrics
-
H-Index50
-
i10 Index123
-
Citation Counts10,269
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* Total H Index Rankings
Rankings
113,209
World Rank
371
Country Rank
70
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Ecotoxicology | Stress physiology and biochemistry | Estuarine ecology | Food Traceability and Safet
Ecotoxicology | Stress physiology and biochemistry | Estuarine ecology | Food Traceability and Safet
H-Index Metrics
-
H-Index46
-
i10 Index149
-
Citation Counts8,503
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* Total H Index Rankings
Rankings
140,192
World Rank
473
Country Rank
1
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Fungal occupational exposure | Indoor air Qualit
Fungal occupational exposure | Indoor air Qualit
H-Index Metrics
-
H-Index42
-
i10 Index118
-
Citation Counts5,297
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* Total H Index Rankings
Rankings
141,017
World Rank
476
Country Rank
90
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Permafrost | Glacial and Periglacial Environments | Climate Change | Remote Sensing of Cryospher
Permafrost | Glacial and Periglacial Environments | Climate Change | Remote Sensing of Cryospher
H-Index Metrics
-
H-Index42
-
i10 Index114
-
Citation Counts7,629
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* Total H Index Rankings
Rankings
159,276
World Rank
562
Country Rank
112
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
173,950
World Rank
625
Country Rank
123
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Regional Climate Modelling | Climate Change | Land-sea-atmosphere interactions | Atmospheric flow ove
Regional Climate Modelling | Climate Change | Land-sea-atmosphere interactions | Atmospheric flow ove
H-Index Metrics
-
H-Index38
-
i10 Index74
-
Citation Counts5,704
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* Total H Index Rankings
Rankings
197,046
World Rank
721
Country Rank
26
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Water treatment | Waste managemen
Environmental Engineering | Water treatment | Waste managemen
H-Index Metrics
-
H-Index36
-
i10 Index62
-
Citation Counts4,908
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* Total H Index Rankings
Rankings
234,884
World Rank
865
Country Rank
178
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Invasion Biology | Conservation Biology | Larval fish ecology | Risk Assessment | Invasion Route
Invasion Biology | Conservation Biology | Larval fish ecology | Risk Assessment | Invasion Route
H-Index Metrics
-
H-Index33
-
i10 Index56
-
Citation Counts3,324
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* Total H Index Rankings
Rankings
235,917
World Rank
869
Country Rank
2
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Tree ecophysiology | Adaptation to Climate Change | Ecohydrolog
Tree ecophysiology | Adaptation to Climate Change | Ecohydrolog
H-Index Metrics
-
H-Index33
-
i10 Index48
-
Citation Counts4,375
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* Total H Index Rankings
Rankings
248,085
World Rank
904
Country Rank
2
University
Ranking Based On Selection:
15
* Total H Index Rankings
Rankings
279,019
World Rank
1,029
Country Rank
226
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
antifouling surfaces | polymers | catalysis | environmental science
antifouling surfaces | polymers | catalysis | environmental science
H-Index Metrics
-
H-Index30
-
i10 Index70
-
Citation Counts3,462
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* Total H Index Rankings
Rankings
310,230
World Rank
1,162
Country Rank
39
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Air pollution | Forest fires | Occupational exposure | Human biomonitoring | Health risks assessmen
Air pollution | Forest fires | Occupational exposure | Human biomonitoring | Health risks assessmen
H-Index Metrics
-
H-Index28
-
i10 Index41
-
Citation Counts2,774
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* Total H Index Rankings
Rankings
325,713
World Rank
1,225
Country Rank
15
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Natural products | Biological activities | Pharmacological and biotechnological application
Natural products | Biological activities | Pharmacological and biotechnological application
H-Index Metrics
-
H-Index27
-
i10 Index54
-
Citation Counts2,697
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* Total H Index Rankings
Rankings
417,733
World Rank
1,604
Country Rank
11
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Lignocellulosic material | Chemical engineerin
Lignocellulosic material | Chemical engineerin
H-Index Metrics
-
H-Index23
-
i10 Index56
-
Citation Counts2,314
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* Total H Index Rankings
Rankings
483,522
World Rank
1,860
Country Rank
64
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Environmetrics. Pedrometrics. DOE. Acquisition and data analysis. Risk Analysi
Environmetrics. Pedrometrics. DOE. Acquisition and data analysis. Risk Analysi
H-Index Metrics
-
H-Index21
-
i10 Index35
-
Citation Counts1,809
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* Total H Index Rankings
Rankings
497,345
World Rank
1,925
Country Rank
411
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Small-scale fisheries | multi-species fisheries | climate change | time series analysis | fisheries managemen
Small-scale fisheries | multi-species fisheries | climate change | time series analysis | fisheries managemen
H-Index Metrics
-
H-Index21
-
i10 Index23
-
Citation Counts1,220
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* Total H Index Rankings
Rankings
508,223
World Rank
1,957
Country Rank
416
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
536,818
World Rank
2,077
Country Rank
7
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Water quality and pollution control. | Environmental Awareness | Modeling | GIS | Sustainability
Water quality and pollution control. | Environmental Awareness | Modeling | GIS | Sustainability
H-Index Metrics
-
H-Index19
-
i10 Index35
-
Citation Counts1,470
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* Total H Index Rankings
Rankings
541,381
World Rank
2,099
Country Rank
22
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Air quality | air quality modelling | Tropospheric Ozone | Urban Air Quality | Indoor Air Qualit
Air quality | air quality modelling | Tropospheric Ozone | Urban Air Quality | Indoor Air Qualit
H-Index Metrics
-
H-Index19
-
i10 Index34
-
Citation Counts1,377
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* Total H Index Rankings
Rankings
544,848
World Rank
2,117
Country Rank
46
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Environmental sciences | water researc
Environmental sciences | water researc
H-Index Metrics
-
H-Index19
-
i10 Index22
-
Citation Counts1,926
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