University, Subject, Country, Region, World
National Institute for Environmental Studies, Japan 21 Scientists Subject Rankings - 2025
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 6 years. As of Jun 19, 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 (1.121.318) 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
63,337
World Rank
1,143
Country Rank
4
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
63,772
World Rank
1,147
Country Rank
5
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
climate change | biogeochemistry | inverse modeling | data assimilation | remote sensin
climate change | biogeochemistry | inverse modeling | data assimilation | remote sensin
H-Index Metrics
-
H-Index56
-
i10 Index180
-
Citation Counts16,889
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* Total H Index Rankings
Rankings
119,237
World Rank
2,359
Country Rank
16
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Industrial Ecology | Environmental Engineerin
Industrial Ecology | Environmental Engineerin
H-Index Metrics
-
H-Index44
-
i10 Index95
-
Citation Counts8,818
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* Total H Index Rankings
Rankings
122,539
World Rank
2,437
Country Rank
17
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
128,692
World Rank
2,598
Country Rank
19
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
186,000
World Rank
3,831
Country Rank
27
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Climate Change | Water Resource Management | Environmental Monitoring and Assessmen
Climate Change | Water Resource Management | Environmental Monitoring and Assessmen
H-Index Metrics
-
H-Index36
-
i10 Index110
-
Citation Counts4,847
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* Total H Index Rankings
Rankings
231,449
World Rank
4,885
Country Rank
29
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
338,720
World Rank
7,246
Country Rank
38
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Risk Assessmen
Environmental Engineering | Risk Assessmen
H-Index Metrics
-
H-Index26
-
i10 Index34
-
Citation Counts2,461
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* Total H Index Rankings
Rankings
487,719
World Rank
10,301
Country Rank
48
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
environmental engineering | wastewater treatment | stable isotope ratios | anaerobic digestio
environmental engineering | wastewater treatment | stable isotope ratios | anaerobic digestio
H-Index Metrics
-
H-Index20
-
i10 Index27
-
Citation Counts1,607
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* Total H Index Rankings
Rankings
487,821
World Rank
10,303
Country Rank
49
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Climate change | impact | adaptation | crops | modelin
Climate change | impact | adaptation | crops | modelin
H-Index Metrics
-
H-Index20
-
i10 Index27
-
Citation Counts1,153
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* Total H Index Rankings
Rankings
497,151
World Rank
10,481
Country Rank
50
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
climate change | international relation
climate change | international relation
H-Index Metrics
-
H-Index20
-
i10 Index29
-
Citation Counts1,330
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* Total H Index Rankings
Rankings
550,537
World Rank
11,437
Country Rank
59
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
sustainable development | climate change mitigation scenari
sustainable development | climate change mitigation scenari
H-Index Metrics
-
H-Index18
-
i10 Index20
-
Citation Counts2,063
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* Total H Index Rankings
Rankings
583,569
World Rank
12,092
Country Rank
64
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
climate change | geoengineering | carbon dioxide removal | science and technology studies | IPC
climate change | geoengineering | carbon dioxide removal | science and technology studies | IPC
H-Index Metrics
-
H-Index17
-
i10 Index20
-
Citation Counts914
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* Total H Index Rankings
Rankings
584,285
World Rank
12,103
Country Rank
65
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
627,050
World Rank
12,836
Country Rank
67
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Climate change mitigation | energy policy | land-use polic
Climate change mitigation | energy policy | land-use polic
H-Index Metrics
-
H-Index16
-
i10 Index25
-
Citation Counts1,620
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* Total H Index Rankings
Rankings
894,182
World Rank
17,214
Country Rank
91
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
1,039,997
World Rank
19,366
Country Rank
97
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
air pollution | epidemiology | flood | heat | infectious diseas
air pollution | epidemiology | flood | heat | infectious diseas
H-Index Metrics
-
H-Index9
-
i10 Index9
-
Citation Counts396
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* Total H Index Rankings
Rankings
1,188,193
World Rank
21,495
Country Rank
102
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Climate Change | Microalgae | Disinfection | Geo-Environment | Waste Managemen
Climate Change | Microalgae | Disinfection | Geo-Environment | Waste Managemen
H-Index Metrics
-
H-Index8
-
i10 Index7
-
Citation Counts314
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* Total H Index Rankings
Rankings
1,279,400
World Rank
22,732
Country Rank
107
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
hydrology | water resources management | climate chang
hydrology | water resources management | climate chang
H-Index Metrics
-
H-Index7
-
i10 Index6
-
Citation Counts162
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* Total H Index Rankings
Rankings
1,566,518
World Rank
26,419
Country Rank
113
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Environmental Science | Plastic additives | Passive dosing metho
Environmental Science | Plastic additives | Passive dosing metho
H-Index Metrics
-
H-Index5
-
i10 Index4
-
Citation Counts286
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* Total H Index Rankings
Rankings
2,017,251
World Rank
32,243
Country Rank
117
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
environmental engineering | municipal solid waste managemen
environmental engineering | municipal solid waste managemen
H-Index Metrics
-
H-Index3
-
i10 Index2
-
Citation Counts27
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