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].
Rankings
Environmental Engineering | membrane technology | solid waste managmen
H-Index Metrics
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H-Index63
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i10 Index188
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Citation Counts13,561
Rankings
Environmental governance | climate change adaptation | sustainability science | knowledge systems | narrative
H-Index Metrics
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H-Index56
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i10 Index162
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Citation Counts25,015
Rankings
Energy and Climate Policy | Cities and Climate Change | Cross-border Power Trade | Energy Access | Energy Modelling and Scenari
H-Index Metrics
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H-Index50
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i10 Index105
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Citation Counts13,715
Rankings
Air pollution engineering and management | Short-lived climate pollutant
H-Index Metrics
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H-Index49
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i10 Index131
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Citation Counts10,414
Rankings
Microbial fuel cells | Photocatalysis | Adsorption | Phytoremediation | Wastewater treatmen
H-Index Metrics
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H-Index49
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i10 Index125
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Citation Counts16,950
Rankings
Environmental Engineering | Wastewater Treatment | Solid Waste Management
H-Index Metrics
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H-Index44
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i10 Index126
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Citation Counts6,956
Rankings
Environmental Technology and Managemen
H-Index Metrics
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H-Index43
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i10 Index147
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Citation Counts8,732
Rankings
photosynthesis | plant biology | microbiolog
H-Index Metrics
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H-Index39
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i10 Index91
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Citation Counts6,102
Rankings
Construction Engineering and Project Management | Environmental Management | Higher Educatio
H-Index Metrics
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H-Index38
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i10 Index63
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Citation Counts5,340
Rankings
Environmental Remediation | Environmental Engineering | Risk Management | Environmental Nanotechnology | Nanoscale Zerovalent Iro
H-Index Metrics
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H-Index37
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i10 Index59
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Citation Counts10,006
Rankings
Regenerative Sanitation | Fecal Sludge Treatment | Decentralized Wastewater Treatment Systems | Non-sewered Sanitation | Constructed Wetland
H-Index Metrics
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H-Index36
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i10 Index94
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Citation Counts5,064
Rankings
marine chemistry | atmospheric chemistry | toxicology | risk assessment | tsunam
H-Index Metrics
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H-Index33
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i10 Index73
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Citation Counts3,042
Rankings
International development | community development | NGOs | adaptation to climate chang
H-Index Metrics
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H-Index31
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i10 Index108
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Citation Counts5,128
Rankings
AI Signal Processing Image Processing AIoT Artificial Intelligence computer science computer visio
H-Index Metrics
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H-Index30
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i10 Index97
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Citation Counts2,816
Rankings
Dendroclimatology | Climate change impac
H-Index Metrics
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H-Index30
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i10 Index66
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Citation Counts3,157
Rankings
Rankings
Rankings
Environmental Engineering | Waste treatment
H-Index Metrics
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H-Index26
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i10 Index50
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Citation Counts2,094
Rankings
Heavy metal bio/phytoremediation | Biodegradation of bioplastics | Environmental Microbiolog
H-Index Metrics
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H-Index26
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i10 Index44
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Citation Counts2,593
Rankings
Environmental Engineering | water microbiolog
H-Index Metrics
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H-Index25
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i10 Index41
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Citation Counts2,530
Rankings
Wastewater Treatment and Reuse & Waste Managment | Bioga
H-Index Metrics
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H-Index25
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i10 Index53
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Citation Counts2,225
Rankings
Nanoscience and Nanotechnology | Materials Science and Engineering | Applied Sciences | Physic
H-Index Metrics
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H-Index24
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i10 Index31
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Citation Counts3,447
Rankings
Environmrntal management | Industrial waste management | climate chang
H-Index Metrics
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H-Index23
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i10 Index45
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Citation Counts2,365
Rankings
crop physiology | rubber | climate smart agriculture | CO2 flu
H-Index Metrics
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H-Index23
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i10 Index43
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Citation Counts1,973
Rankings
Anaerobic digestion | Anaerobic microbes | Biogas technology | Biological waste treatment and utilization | Bioenerg
H-Index Metrics
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H-Index23
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i10 Index41
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Citation Counts1,805
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