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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 05, 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
4,647
World Rank
86
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
climate | climate change | Earth system modelling | aerosols | aerosol-radiation interaction
climate | climate change | Earth system modelling | aerosols | aerosol-radiation interaction
H-Index Metrics
-
H-Index124
-
i10 Index390
-
Citation Counts72,429
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* Total H Index Rankings
Rankings
8,858
World Rank
157
Country Rank
3
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Regional climate | Climate Change | Extreme Events | Energy | Air pollutio
Regional climate | Climate Change | Extreme Events | Energy | Air pollutio
H-Index Metrics
-
H-Index105
-
i10 Index280
-
Citation Counts67,431
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* Total H Index Rankings
Rankings
9,596
World Rank
175
Country Rank
17
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
oceanography | biogeochemistry | climate change | ocean solution
oceanography | biogeochemistry | climate change | ocean solution
H-Index Metrics
-
H-Index103
-
i10 Index263
-
Citation Counts48,897
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* Total H Index Rankings
Rankings
17,783
World Rank
349
Country Rank
6
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
30,443
World Rank
666
Country Rank
4
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
35,470
World Rank
788
Country Rank
1
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | water treatments | air treatments | adsorption | VO
Environmental Engineering | water treatments | air treatments | adsorption | VO
H-Index Metrics
-
H-Index71
-
i10 Index244
-
Citation Counts19,475
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* Total H Index Rankings
Rankings
50,269
World Rank
1,191
Country Rank
12
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
59,780
World Rank
1,439
Country Rank
93
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Land surface modeling | Hydrology | Climate change impacts | Remote sensin
Land surface modeling | Hydrology | Climate change impacts | Remote sensin
H-Index Metrics
-
H-Index59
-
i10 Index103
-
Citation Counts13,333
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* Total H Index Rankings
Rankings
67,387
World Rank
1,661
Country Rank
6
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
77,854
World Rank
1,983
Country Rank
63
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
grassland | livestock | agroecology | ecosystem services | climate chang
grassland | livestock | agroecology | ecosystem services | climate chang
H-Index Metrics
-
H-Index54
-
i10 Index185
-
Citation Counts11,356
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* Total H Index Rankings
Rankings
83,729
World Rank
2,160
Country Rank
1
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
84,740
World Rank
2,180
Country Rank
30
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
86,585
World Rank
2,274
Country Rank
1
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
biotechnology | microbiology | wastewater treatment | environmental engineering | pollution prevention and resource recover
biotechnology | microbiology | wastewater treatment | environmental engineering | pollution prevention and resource recover
H-Index Metrics
-
H-Index52
-
i10 Index110
-
Citation Counts9,595
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* Total H Index Rankings
Rankings
99,706
World Rank
2,699
Country Rank
70
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Environmental virology - Phages - Enteric viruses - Inactivation - Behavior - Adhesion/agregation - surface propertie
Environmental virology - Phages - Enteric viruses - Inactivation - Behavior - Adhesion/agregation - surface propertie
H-Index Metrics
-
H-Index49
-
i10 Index92
-
Citation Counts7,265
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* Total H Index Rankings
Rankings
113,166
World Rank
3,157
Country Rank
2
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
hydrology | remote sensing | water resources | climate change | sno
hydrology | remote sensing | water resources | climate change | sno
H-Index Metrics
-
H-Index46
-
i10 Index112
-
Citation Counts8,312
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* Total H Index Rankings
Rankings
119,588
World Rank
3,356
Country Rank
91
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
Climate change | Soil biogeochemistry | Ecology | Carbon cycle | Grassland managemen
Climate change | Soil biogeochemistry | Ecology | Carbon cycle | Grassland managemen
H-Index Metrics
-
H-Index45
-
i10 Index97
-
Citation Counts8,572
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* Total H Index Rankings
Rankings
120,385
World Rank
3,385
Country Rank
47
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
biotechnologie | génie des procédés | technologies membranaires | agroalimentair
biotechnologie | génie des procédés | technologies membranaires | agroalimentair
H-Index Metrics
-
H-Index45
-
i10 Index121
-
Citation Counts6,687
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* Total H Index Rankings
Rankings
133,012
World Rank
3,806
Country Rank
81
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Climate Change | Climate Services | Extreme Events | Renewable Energy | Afric
Climate Change | Climate Services | Extreme Events | Renewable Energy | Afric
H-Index Metrics
-
H-Index43
-
i10 Index106
-
Citation Counts12,294
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* Total H Index Rankings
Rankings
133,159
World Rank
3,814
Country Rank
32
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
climate change | peatlands | microbial food web | plant-soil interactions | functional trait
climate change | peatlands | microbial food web | plant-soil interactions | functional trait
H-Index Metrics
-
H-Index43
-
i10 Index80
-
Citation Counts4,826
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* Total H Index Rankings
Rankings
136,176
World Rank
3,909
Country Rank
8
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
144,544
World Rank
4,214
Country Rank
78
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
146,292
World Rank
4,293
Country Rank
54
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Conservation | Biogeography | Conservation Biology | Ecology | Climate Chang
Conservation | Biogeography | Conservation Biology | Ecology | Climate Chang
H-Index Metrics
-
H-Index41
-
i10 Index68
-
Citation Counts9,465
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* Total H Index Rankings
Rankings
151,147
World Rank
4,432
Country Rank
54
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Statistical mechanics | climate sciences | extreme events | rare events | energy transitio
Statistical mechanics | climate sciences | extreme events | rare events | energy transitio
H-Index Metrics
-
H-Index41
-
i10 Index87
-
Citation Counts5,610
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* Total H Index Rankings
Rankings
156,822
World Rank
4,615
Country Rank
21
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
166,847
World Rank
4,949
Country Rank
16
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Air quality | tropospheric ozone | aerosols | remote sensin
Air quality | tropospheric ozone | aerosols | remote sensin
H-Index Metrics
-
H-Index39
-
i10 Index70
-
Citation Counts5,007
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