The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 6 years. As of Jan 31, 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 (870.053) 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 IndexRankings
Ranking Based On Selection: 1
Environmental Engineering
Biogeochemistry
Advanced Oxidation Processes
Membrane Technologies
Capacitive Deionization
Metrics
H-Index
i10 Index
Citation Counts
112
431
43,212
* Total H IndexRankings
Ranking Based On Selection: 2
tuberculosis
asthma
COPD
air pollution
Metrics
H-Index
i10 Index
Citation Counts
105
388
116,147
* Total H IndexRankings
Ranking Based On Selection: 3
climate change
sea level
Metrics
H-Index
i10 Index
Citation Counts
92
218
131,450
* Total H IndexRankings
Ranking Based On Selection: 4
Hydrology
Hydroclimatology
Water Resources
Statistical Hydrology
Metrics
H-Index
i10 Index
Citation Counts
76
262
20,256
* Total H IndexRankings
Ranking Based On Selection: 5
Environmental epidemiology
air pollution
population health
Metrics
H-Index
i10 Index
Citation Counts
73
257
16,292
* Total H IndexRankings
Ranking Based On Selection: 6
Archaea and Antarctic microbiology
Metrics
H-Index
i10 Index
Citation Counts
67
129
16,355
* Total H IndexRankings
Ranking Based On Selection: 7
Water quality and treatment
water reuse
sustainability
Metrics
H-Index
i10 Index
Citation Counts
64
182
15,708
* Total H IndexRankings
Ranking Based On Selection: 8
Environmental Science and Engineering
Metrics
H-Index
i10 Index
Citation Counts
59
180
14,873
* Total H IndexRankings
Ranking Based On Selection: 9
climate extremes
climate change
climate variability
predictability
Metrics
H-Index
i10 Index
Citation Counts
58
107
20,526
* Total H IndexRankings
Ranking Based On Selection: 10
Climate
extremes
temperature
projections
climate models
Metrics
H-Index
i10 Index
Citation Counts
53
96
19,562
* Total H IndexRankings
Ranking Based On Selection: 11
Concrete Structures
SFRC
Fibre Reinforced Concrete
Geopolymer Concrete
Shear
Metrics
H-Index
i10 Index
Citation Counts
52
147
8,626
* Total H IndexRankings
Ranking Based On Selection: 12
Environmental and applied microbiology
Metrics
H-Index
i10 Index
Citation Counts
50
119
15,295
* Total H IndexRankings
Ranking Based On Selection: 13
environmental management and policy
remote sensing
spatial modelling
sustainable land management
land degradation
Metrics
H-Index
i10 Index
Citation Counts
49
114
12,332
* Total H IndexRankings
Ranking Based On Selection: 14
PFAS
Fate of Emerging Contaminants
Environmental Nanotechnology
Groundwater Contamination
Innovative Groundwater Remediation
Metrics
H-Index
i10 Index
Citation Counts
49
91
9,848
* Total H IndexRankings
Ranking Based On Selection: 15
Water Treatment - Membrane Processes
Metrics
H-Index
i10 Index
Citation Counts
46
110
6,837
* Total H IndexRankings
Ranking Based On Selection: 16
Climate Modeling- Paleoclimate - Carbon Cycle
Metrics
H-Index
i10 Index
Citation Counts
43
73
5,227
* Total H IndexRankings
Ranking Based On Selection: 17
Climate model dependence
model benchmarking
land surface modelling
model evaluation
Metrics
H-Index
i10 Index
Citation Counts
43
73
6,789
* Total H IndexRankings
Ranking Based On Selection: 18
climate
oceanography
enso
climate models
climate change
Metrics
H-Index
i10 Index
Citation Counts
42
73
13,764
* Total H IndexRankings
Ranking Based On Selection: 19
hybrid structures
timber structures
timber engineering
timber
Metrics
H-Index
i10 Index
Citation Counts
40
100
4,642
* Total H IndexRankings
Ranking Based On Selection: 20
Transportation
Networks
Traffic Flow Theory
Active Transportation
Mixed Autonomy
Metrics
H-Index
i10 Index
Citation Counts
37
75
4,203
* Total H IndexRankings
Ranking Based On Selection: 21
empirical shoreline modelling
dune erosion
climate impacts on sandy shorelines
machine learning applications to coastal proce
Metrics
H-Index
i10 Index
Citation Counts
37
70
5,528
* Total H IndexRankings
Ranking Based On Selection: 22
Soil mechanics
geotechnical engineering
Metrics
H-Index
i10 Index
Citation Counts
37
64
4,617
* Total H IndexRankings
Ranking Based On Selection: 23
Water
Wastewater
Recycled Water
Metrics
H-Index
i10 Index
Citation Counts
35
66
3,812
* Total H IndexRankings
Ranking Based On Selection: 24
Climate Science
Metrics
H-Index
i10 Index
Citation Counts
33
61
5,978
* Total H IndexRankings
Ranking Based On Selection: 25
hydrology
climate change
IFDs and extreme rainfall
flooding
Metrics
H-Index
i10 Index
Citation Counts
32
70
4,870
T David Waite
Metrics
H-Index
i10-Index
Citation Counts
112
431
43,212
Environmental Engineering
Biogeochemistry
Advanced Oxidation Processes
Membrane Technologies
Capacitive Deionization
Guy B Marks
Metrics
H-Index
i10-Index
Citation Counts
105
388
116,147
tuberculosis
asthma
COPD
air pollution
John Church
Metrics
H-Index
i10-Index
Citation Counts
92
218
131,450
climate change
sea level
Ashish Sharma
Metrics
H-Index
i10-Index
Citation Counts
76
262
20,256
Hydrology
Hydroclimatology
Water Resources
Statistical Hydrology
Bin Jalaludin
Metrics
H-Index
i10-Index
Citation Counts
73
257
16,292
Environmental epidemiology
air pollution
population health
Ricardo Cavicchioli
Metrics
H-Index
i10-Index
Citation Counts
67
129
16,355
Archaea and Antarctic microbiology
Stuart Khan
Metrics
H-Index
i10-Index
Citation Counts
64
182
15,708
Water quality and treatment
water reuse
sustainability
Richard M Stuetz
Metrics
H-Index
i10-Index
Citation Counts
59
180
14,873
Environmental Science and Engineering
Markus G Donat
Metrics
H-Index
i10-Index
Citation Counts
58
107
20,526
climate extremes
climate change
climate variability
predictability
Sarah Perkins Kirkpatrick
Metrics
H-Index
i10-Index
Citation Counts
53
96
19,562
Climate
extremes
temperature
projections
climate models
Stephen Foster
Metrics
H-Index
i10-Index
Citation Counts
52
147
8,626
Concrete Structures
SFRC
Fibre Reinforced Concrete
Geopolymer Concrete
Shear
Mike Manefield
Metrics
H-Index
i10-Index
Citation Counts
50
119
15,295
Environmental and applied microbiology
Graciela Metternicht
Metrics
H-Index
i10-Index
Citation Counts
49
114
12,332
environmental management and policy
remote sensing
spatial modelling
sustainable land management
land degradation
Denis O Carroll
Metrics
H-Index
i10-Index
Citation Counts
49
91
9,848
PFAS
Fate of Emerging Contaminants
Environmental Nanotechnology
Groundwater Contamination
Innovative Groundwater Remediation
Greg Leslie
Metrics
H-Index
i10-Index
Citation Counts
46
110
6,837
Water Treatment - Membrane Processes
Laurie Menviel
Metrics
H-Index
i10-Index
Citation Counts
43
73
5,227
Climate Modeling- Paleoclimate - Carbon Cycle
Gab Abramowitz
Metrics
H-Index
i10-Index
Citation Counts
43
73
6,789
Climate model dependence
model benchmarking
land surface modelling
model evaluation
Agus Santoso
Metrics
H-Index
i10-Index
Citation Counts
42
73
13,764
climate
oceanography
enso
climate models
climate change
Hamid Valipour
Metrics
H-Index
i10-Index
Citation Counts
40
100
4,642
hybrid structures
timber structures
timber engineering
timber
Meead Saberi
Metrics
H-Index
i10-Index
Citation Counts
37
75
4,203
Transportation
Networks
Traffic Flow Theory
Active Transportation
Mixed Autonomy
Kristen D Splinter
Metrics
H-Index
i10-Index
Citation Counts
37
70
5,528
empirical shoreline modelling
dune erosion
climate impacts on sandy shorelines
machine learning applications to coastal proce
Adrian Russell
Metrics
H-Index
i10-Index
Citation Counts
37
64
4,617
Soil mechanics
geotechnical engineering
Arash Zamyadi
Metrics
H-Index
i10-Index
Citation Counts
35
66
3,812
Water
Wastewater
Recycled Water
Andrea S Taschetto
Metrics
H-Index
i10-Index
Citation Counts
33
61
5,978
Fiona Johnson
Metrics
H-Index
i10-Index
Citation Counts
32
70
4,870
hydrology
climate change
IFDs and extreme rainfall
flooding