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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
9,388
World Rank
31
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Waste/wastewater treatment | cellulose/algae biofuels | Environmental Remediation. Nanotechnolog
Waste/wastewater treatment | cellulose/algae biofuels | Environmental Remediation. Nanotechnolog
H-Index Metrics
-
H-Index103
-
i10 Index378
-
Citation Counts35,273
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* Total H Index Rankings
Rankings
11,879
World Rank
44
Country Rank
7
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
27,706
World Rank
126
Country Rank
47
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
36,660
World Rank
181
Country Rank
2
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Climate change impact | past climate change
Climate change impact | past climate change
H-Index Metrics
-
H-Index70
-
i10 Index165
-
Citation Counts14,858
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* Total H Index Rankings
Rankings
39,051
World Rank
204
Country Rank
37
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
53,765
World Rank
308
Country Rank
105
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
climate extremes | climate risk | systemic risk | storylines | adaptatio
climate extremes | climate risk | systemic risk | storylines | adaptatio
H-Index Metrics
-
H-Index61
-
i10 Index106
-
Citation Counts40,725
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* Total H Index Rankings
Rankings
60,713
World Rank
353
Country Rank
66
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Environmental Toxicology | Ecotoxicology | Environmental Physiolog
Environmental Toxicology | Ecotoxicology | Environmental Physiolog
H-Index Metrics
-
H-Index59
-
i10 Index199
-
Citation Counts11,047
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* Total H Index Rankings
Rankings
80,998
World Rank
508
Country Rank
26
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Non-market Valuation | Benefit transfer | Valuation of Ecosystem Services & Cultural Heritage & Public Health | Energy Externalitie
Non-market Valuation | Benefit transfer | Valuation of Ecosystem Services & Cultural Heritage & Public Health | Energy Externalitie
H-Index Metrics
-
H-Index53
-
i10 Index125
-
Citation Counts10,783
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* Total H Index Rankings
Rankings
102,822
World Rank
670
Country Rank
35
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
climate change | vulnerability | adaptatio
climate change | vulnerability | adaptatio
H-Index Metrics
-
H-Index48
-
i10 Index90
-
Citation Counts24,628
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* Total H Index Rankings
Rankings
110,899
World Rank
735
Country Rank
43
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
124,954
World Rank
839
Country Rank
152
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Professor (Full) of Environmental Chemistr
Professor (Full) of Environmental Chemistr
H-Index Metrics
-
H-Index44
-
i10 Index80
-
Citation Counts6,849
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* Total H Index Rankings
Rankings
127,839
World Rank
854
Country Rank
6
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Environmental geochemistry | environmental engineerin
Environmental geochemistry | environmental engineerin
H-Index Metrics
-
H-Index44
-
i10 Index75
-
Citation Counts7,009
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* Total H Index Rankings
Rankings
134,497
World Rank
899
Country Rank
16
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Plant biology | Ecology | Biodiversity | Climate change impact assessments | Taxonom
Plant biology | Ecology | Biodiversity | Climate change impact assessments | Taxonom
H-Index Metrics
-
H-Index43
-
i10 Index95
-
Citation Counts9,546
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* Total H Index Rankings
Rankings
135,704
World Rank
911
Country Rank
17
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
environmental science | spatial ecology | marine ecolog
environmental science | spatial ecology | marine ecolog
H-Index Metrics
-
H-Index43
-
i10 Index84
-
Citation Counts7,443
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* Total H Index Rankings
Rankings
153,386
World Rank
1,042
Country Rank
12
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Environmental Sciences | Ecotoxicology | Environmental chemistr
Environmental Sciences | Ecotoxicology | Environmental chemistr
H-Index Metrics
-
H-Index41
-
i10 Index59
-
Citation Counts4,727
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* Total H Index Rankings
Rankings
156,321
World Rank
1,058
Country Rank
9
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
environmental science | aquatic ecotoxicology | bioaccumulation | plastic pollution | trace metal
environmental science | aquatic ecotoxicology | bioaccumulation | plastic pollution | trace metal
H-Index Metrics
-
H-Index40
-
i10 Index68
-
Citation Counts6,400
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* Total H Index Rankings
Rankings
158,249
World Rank
1,071
Country Rank
14
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Environmental chemistry | passive sampling | environmental sciences | pollutio
Environmental chemistry | passive sampling | environmental sciences | pollutio
H-Index Metrics
-
H-Index40
-
i10 Index75
-
Citation Counts7,638
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* Total H Index Rankings
Rankings
159,255
World Rank
1,079
Country Rank
8
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
environmental sciences | air pollution | environmental epidemiolog
environmental sciences | air pollution | environmental epidemiolog
H-Index Metrics
-
H-Index40
-
i10 Index76
-
Citation Counts7,299
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* Total H Index Rankings
Rankings
197,041
World Rank
1,364
Country Rank
77
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Governance | institutions | protected areas | livelihood analysi
Governance | institutions | protected areas | livelihood analysi
H-Index Metrics
-
H-Index36
-
i10 Index62
-
Citation Counts6,253
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* Total H Index Rankings
Rankings
200,175
World Rank
1,385
Country Rank
17
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Risk assessment | contaminants | PFAS | PAH | pharmaceutical
Risk assessment | contaminants | PFAS | PAH | pharmaceutical
H-Index Metrics
-
H-Index36
-
i10 Index77
-
Citation Counts4,903
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* Total H Index Rankings
Rankings
221,865
World Rank
1,531
Country Rank
13
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
glaciology | climate change | earth syste
glaciology | climate change | earth syste
H-Index Metrics
-
H-Index34
-
i10 Index73
-
Citation Counts6,934
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* Total H Index Rankings
Rankings
232,867
World Rank
1,616
Country Rank
212
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
climate change adaptation | urban resilience | uncertainty | framing | science-policy interfac
climate change adaptation | urban resilience | uncertainty | framing | science-policy interfac
H-Index Metrics
-
H-Index33
-
i10 Index58
-
Citation Counts4,339
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* Total H Index Rankings
Rankings
242,515
World Rank
1,695
Country Rank
15
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Satellite Remote Sensing | Land Surface Temperature | Air Quality | Trend Analysis | Spatial Data Scienc
Satellite Remote Sensing | Land Surface Temperature | Air Quality | Trend Analysis | Spatial Data Scienc
H-Index Metrics
-
H-Index32
-
i10 Index44
-
Citation Counts7,176
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* Total H Index Rankings
Rankings
244,191
World Rank
1,707
Country Rank
16
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Environmental science | organic contaminants | indoor environmen
Environmental science | organic contaminants | indoor environmen
H-Index Metrics
-
H-Index32
-
i10 Index46
-
Citation Counts3,181
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* Total H Index Rankings
Rankings
247,376
World Rank
1,731
Country Rank
486
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Peacebuilding | Sustainable Development | Business and Peace | Climate Change and Conflict | Polycrisi
Peacebuilding | Sustainable Development | Business and Peace | Climate Change and Conflict | Polycrisi
H-Index Metrics
-
H-Index32
-
i10 Index45
-
Citation Counts2,863
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