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].
Rankings
Rankings
Environmental and Occupational Medicin
H-Index Metrics
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H-Index71
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i10 Index326
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Citation Counts18,014
Rankings
Modern and paleoclimate changes | Geochemistry | U-Th datin
H-Index Metrics
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H-Index66
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i10 Index249
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Citation Counts22,350
Rankings
water electrolysis | green hydrogen production | zinc air battery | electrochemical energy storag
H-Index Metrics
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H-Index62
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i10 Index192
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Citation Counts13,018
Rankings
Rankings
Rankings
Rankings
Environment | Agriculture | and everything in betwee
H-Index Metrics
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H-Index56
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i10 Index109
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Citation Counts12,463
Rankings
Indoor Air Quality | Bioaerosols | Climate Change | Public Healt
H-Index Metrics
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H-Index54
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i10 Index129
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Citation Counts11,033
Rankings
air pollution | nonthermal plasma | dioxi
H-Index Metrics
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H-Index53
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i10 Index159
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Citation Counts9,553
Rankings
Water Pollution | Chemicals of Emerging Concern | Photochemistry | Water Reus
H-Index Metrics
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H-Index48
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i10 Index83
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Citation Counts9,635
Rankings
Exposure and Risk Assessment | Organic Aerosols | Environmental Health Management | Health Adaptation | Heat Vulnerability Assessmen
H-Index Metrics
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H-Index48
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i10 Index129
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Citation Counts7,935
Rankings
Rankings
Environmental Engineering and Technolog
H-Index Metrics
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H-Index46
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i10 Index139
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Citation Counts8,096
Rankings
Rankings
Hydrology | Water Resources | Aritificial Intelligence | Neural Networ
H-Index Metrics
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H-Index45
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i10 Index61
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Citation Counts6,114
Rankings
Rankings
Membrane Process | Photocatalysis | Environmental Nanotechnolog
H-Index Metrics
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H-Index44
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i10 Index105
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Citation Counts6,588
Rankings
Water treatment and recovery | Membrane separation and fabrication | Disinfection and disinfection by-products | Torrefactio
H-Index Metrics
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H-Index43
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i10 Index101
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Citation Counts4,894
Rankings
Air quality | Regional Climate Changes | Urban heat isalnd effect | Mesoscale Meteorolog
H-Index Metrics
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H-Index41
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i10 Index94
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Citation Counts5,750
Rankings
Earth and environmental science | biotechnology | Nanotechnolog | biosurfactants | environmental microbiology/DN
H-Index Metrics
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H-Index41
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i10 Index80
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Citation Counts6,074
Rankings
Hg control technology | environmental nanotechnology | air quality engineering | soil remediatio
H-Index Metrics
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H-Index41
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i10 Index100
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Citation Counts5,396
Rankings
environmental engineering | environmental science | bioresourc
H-Index Metrics
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H-Index41
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i10 Index63
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Citation Counts5,987
Rankings
Environmental studies | Comparative Education | Buddhism | Japa
H-Index Metrics
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H-Index40
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i10 Index120
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Citation Counts5,482
Rankings
Wastewater treatment | nanomaterials | catalyst | advanced oxidation processes
H-Index Metrics
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H-Index39
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i10 Index78
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Citation Counts4,704

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