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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 03, 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
11,506
World Rank
512
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
environment | global changes | carbon cycl
environment | global changes | carbon cycl
H-Index Metrics
-
H-Index98
-
i10 Index285
-
Citation Counts70,412
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* Total H Index Rankings
Rankings
18,863
World Rank
778
Country Rank
17
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
environmental science | integrated assessment | sustainability science | life cycle assessment | ecoinnovatio
environmental science | integrated assessment | sustainability science | life cycle assessment | ecoinnovatio
H-Index Metrics
-
H-Index85
-
i10 Index217
-
Citation Counts27,354
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* Total H Index Rankings
Rankings
20,562
World Rank
855
Country Rank
1
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
21,510
World Rank
898
Country Rank
3
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Carbon cycle | ecology | climate change | research infrastructures | remote sensin
Carbon cycle | ecology | climate change | research infrastructures | remote sensin
H-Index Metrics
-
H-Index82
-
i10 Index155
-
Citation Counts49,128
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* Total H Index Rankings
Rankings
21,841
World Rank
909
Country Rank
2
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Physiological aspects of crop adaptation | Crop-livestock systems | Climate chang
Physiological aspects of crop adaptation | Crop-livestock systems | Climate chang
H-Index Metrics
-
H-Index82
-
i10 Index234
-
Citation Counts22,756
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* Total H Index Rankings
Rankings
34,319
World Rank
1,447
Country Rank
19
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Climate change economics | integrated assessment of climate chang
Climate change economics | integrated assessment of climate chang
H-Index Metrics
-
H-Index71
-
i10 Index167
-
Citation Counts30,774
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* Total H Index Rankings
Rankings
40,765
World Rank
1,717
Country Rank
23
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Systems and Control | Environmental Intelligence | Water Resources Management | Decision Makin
Systems and Control | Environmental Intelligence | Water Resources Management | Decision Makin
H-Index Metrics
-
H-Index67
-
i10 Index156
-
Citation Counts15,097
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* Total H Index Rankings
Rankings
42,667
World Rank
1,796
Country Rank
14
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
46,369
World Rank
1,962
Country Rank
13
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
50,430
World Rank
2,155
Country Rank
14
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
QSAR | Environmental Chemistry | Ecotoxicology | Molecular modelling | Chemoinformatic
QSAR | Environmental Chemistry | Ecotoxicology | Molecular modelling | Chemoinformatic
H-Index Metrics
-
H-Index63
-
i10 Index130
-
Citation Counts24,779
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* Total H Index Rankings
Rankings
66,246
World Rank
2,924
Country Rank
144
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
water resources | earth science | environmental science | engineerin
water resources | earth science | environmental science | engineerin
H-Index Metrics
-
H-Index57
-
i10 Index124
-
Citation Counts11,732
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* Total H Index Rankings
Rankings
66,741
World Rank
2,956
Country Rank
1
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Air pollution | Atmospheric modeling | Earth Observation | Environmental Polic
Air pollution | Atmospheric modeling | Earth Observation | Environmental Polic
H-Index Metrics
-
H-Index57
-
i10 Index165
-
Citation Counts17,754
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* Total H Index Rankings
Rankings
71,625
World Rank
3,223
Country Rank
3
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
climate change | agriculture | adaptation | biodiversity | conservatio
climate change | agriculture | adaptation | biodiversity | conservatio
H-Index Metrics
-
H-Index55
-
i10 Index112
-
Citation Counts14,587
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* Total H Index Rankings
Rankings
72,081
World Rank
3,235
Country Rank
4
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
climate change and variability | climate-smart agriculture | Climate information services | Scienc
climate change and variability | climate-smart agriculture | Climate information services | Scienc
H-Index Metrics
-
H-Index55
-
i10 Index131
-
Citation Counts14,629
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* Total H Index Rankings
Rankings
74,182
World Rank
3,350
Country Rank
34
University
Ranking Based On Selection:
15
* Total H Index Rankings
Rankings
79,109
World Rank
3,596
Country Rank
7
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
air pollution | climate change | impacts on ecosystem
air pollution | climate change | impacts on ecosystem
H-Index Metrics
-
H-Index53
-
i10 Index111
-
Citation Counts10,958
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* Total H Index Rankings
Rankings
79,897
World Rank
3,619
Country Rank
55
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
80,756
World Rank
3,666
Country Rank
56
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
81,779
World Rank
3,732
Country Rank
3
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
climate change impacts | crop physiology | plant phenology | use of stable isotpes in plant physiolog
climate change impacts | crop physiology | plant phenology | use of stable isotpes in plant physiolog
H-Index Metrics
-
H-Index53
-
i10 Index101
-
Citation Counts13,112
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* Total H Index Rankings
Rankings
84,614
World Rank
3,879
Country Rank
14
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
90,313
World Rank
4,191
Country Rank
60
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Soil Microbiology | Bioremediation | Environmental Biotechnology | Biological Processes for Waste Treatmen
Soil Microbiology | Bioremediation | Environmental Biotechnology | Biological Processes for Waste Treatmen
H-Index Metrics
-
H-Index51
-
i10 Index97
-
Citation Counts9,358
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* Total H Index Rankings
Rankings
91,944
World Rank
4,276
Country Rank
52
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
water treatment | membranes | advanced oxidation processe
water treatment | membranes | advanced oxidation processe
H-Index Metrics
-
H-Index50
-
i10 Index105
-
Citation Counts12,207
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* Total H Index Rankings
Rankings
100,478
World Rank
4,734
Country Rank
11
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
functional materials | gas sensors | air quality sensors | critical raw materials | environmental sustainability application
functional materials | gas sensors | air quality sensors | critical raw materials | environmental sustainability application
H-Index Metrics
-
H-Index49
-
i10 Index96
-
Citation Counts7,882
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* Total H Index Rankings
Rankings
107,949
World Rank
5,131
Country Rank
225
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
108,691
World Rank
5,165
Country Rank
284
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Wastewater treatment | Soil and sediment remediation | Biorefineries | Materials science and technology | Applied Chemistr
Wastewater treatment | Soil and sediment remediation | Biorefineries | Materials science and technology | Applied Chemistr
H-Index Metrics
-
H-Index47
-
i10 Index114
-
Citation Counts6,485
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