University, Subject, Country, Region, World
United Nations University 154 Scientists Subject Rankings - 2025
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 28, 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 (873.688) 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
Economics
Labor Economics
Population Economics
Migration
Metrics
H-Index
i10 Index
Citation Counts
89
320
29,602
* Total H IndexRankings
Ranking Based On Selection: 2
Unconventional water resources
water recycling and reuse
water quality and environmental health
water security
land degradat
Metrics
H-Index
i10 Index
Citation Counts
65
132
20,961
* Total H IndexRankings
Ranking Based On Selection: 3
Computer Science
Software Engineering
Metrics
H-Index
i10 Index
Citation Counts
57
237
13,094
* Total H IndexRankings
Ranking Based On Selection: 4
Sustainability Research
Digital Transformations
Global Governance
Climate Politics
Metrics
H-Index
i10 Index
Citation Counts
51
153
12,815
* Total H IndexRankings
Ranking Based On Selection: 5
Water
hydrology
floods
droughts
environmental flows
Metrics
H-Index
i10 Index
Citation Counts
49
118
13,748
* Total H IndexRankings
Ranking Based On Selection: 6
Oil and gas
Mining
Extractives
Aid
Poverty
Metrics
H-Index
i10 Index
Citation Counts
46
112
7,649
* Total H IndexRankings
Ranking Based On Selection: 7
Disaster risk reduction and adptation
risk tipping points
ecosystem loss and damege
Metrics
H-Index
i10 Index
Citation Counts
39
60
8,413
* Total H IndexRankings
Ranking Based On Selection: 8
Professor of Environmental Health
Metrics
H-Index
i10 Index
Citation Counts
38
71
4,913
* Total H IndexRankings
Ranking Based On Selection: 9
Human Mobility
Climate Mobility
Environmental Migration
Displacement
Loss and Damage
Metrics
H-Index
i10 Index
Citation Counts
34
54
3,885
* Total H IndexRankings
Ranking Based On Selection: 10
Decision Support Systems
Crisis Response and Management
Policy Analysis
Metrics
H-Index
i10 Index
Citation Counts
34
90
5,365
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* Total H IndexRankings
Ranking Based On Selection: 11
Economic Development
International Economics
Metrics
H-Index
i10 Index
Citation Counts
32
71
4,382
* Total H IndexRankings
Ranking Based On Selection: 12
Hydrology
Climate Change and Impacts
Urban Water
Disaster Risk Reduction
Numerical Modeling
Metrics
H-Index
i10 Index
Citation Counts
32
68
4,551
* Total H IndexRankings
Ranking Based On Selection: 13
Development Economics
Labour markets
Foreign Aid
Education
Mozambique
Metrics
H-Index
i10 Index
Citation Counts
30
51
3,951
* Total H IndexRankings
Ranking Based On Selection: 14
vulnerability
systemic risk
risk management
adaptation
hydrological extremes
Metrics
H-Index
i10 Index
Citation Counts
29
41
3,130
* Total H IndexRankings
Ranking Based On Selection: 15
Development Economics
Social Protection
Poverty
Inequality
Political Economy
Metrics
H-Index
i10 Index
Citation Counts
29
63
4,390
* Total H IndexRankings
Ranking Based On Selection: 16
E-waste
Sustainable Production
Consumption and Disposal
Technology Transfer
Environmental Policies
Metrics
H-Index
i10 Index
Citation Counts
29
40
10,586
* Total H IndexRankings
Ranking Based On Selection: 17
innovation
Metrics
H-Index
i10 Index
Citation Counts
26
40
2,685
* Total H IndexRankings
Ranking Based On Selection: 18
Remote Sensing/GIS
Environment
Water Resources
Agriculture
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
25
29
2,759
* Total H IndexRankings
Ranking Based On Selection: 19
sustainability
waste management
circular economy
geotechnical engineering
Metrics
H-Index
i10 Index
Citation Counts
24
36
3,170
* Total H IndexRankings
Ranking Based On Selection: 20
Inequality
Political Economics
Development Economics
Metrics
H-Index
i10 Index
Citation Counts
24
45
2,283
* Total H IndexRankings
Ranking Based On Selection: 21
firm growth innovation entrepreneurship employment empowerment developing countries
Metrics
H-Index
i10 Index
Citation Counts
22
36
3,947
* Total H IndexRankings
Ranking Based On Selection: 22
Natural resources management
poverty analysis
capacity building
agricultural economics
Metrics
H-Index
i10 Index
Citation Counts
22
31
1,838
* Total H IndexRankings
Ranking Based On Selection: 23
E-waste
Waste Management
Life Cycle Asssessment
Metrics
H-Index
i10 Index
Citation Counts
21
25
3,975
* Total H IndexRankings
Ranking Based On Selection: 24
Economics of science
Emerging technologies
Digitalisation and society
Green transition and
Metrics
H-Index
i10 Index
Citation Counts
21
30
1,692
* Total H IndexRankings
Ranking Based On Selection: 25
Industrialization
Technology and Innovation
Metrics
H-Index
i10 Index
Citation Counts
21
31
1,579
Klaus F Zimmermann
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
89
320
29,602
Economics
Labor Economics
Population Economics
Migration
Manzoor Qadir
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
65
132
20,961
Unconventional water resources
water recycling and reuse
water quality and environmental health
water security
land degradat
Zhiming Liu
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
57
237
13,094
Computer Science
Software Engineering
Dirk Messner
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
51
153
12,815
Sustainability Research
Digital Transformations
Global Governance
Climate Politics
Vladimir Smakhtin
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
49
118
13,748
Water
hydrology
floods
droughts
environmental flows
Tony Addison
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
46
112
7,649
Oil and gas
Mining
Extractives
Aid
Poverty
Zita Sebesvari
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
39
60
8,413
Disaster risk reduction and adptation
risk tipping points
ecosystem loss and damege
Jamal Hisham Hashim
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
38
71
4,913
Kees Van Der Geest
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
34
54
3,885
Human Mobility
Climate Mobility
Environmental Migration
Displacement
Loss and Damage
Bartel Van De Walle
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
34
90
5,365
Decision Support Systems
Crisis Response and Management
Policy Analysis
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Foster Mcgregor Neil
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
32
71
4,382
Economic Development
International Economics
Srikantha Herath
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
32
68
4,551
Hydrology
Climate Change and Impacts
Urban Water
Disaster Risk Reduction
Numerical Modeling
Sam Jones
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
30
51
3,951
Development Economics
Labour markets
Foreign Aid
Education
Mozambique
Michael Enlocher
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
29
41
3,130
vulnerability
systemic risk
risk management
adaptation
hydrological extremes
Miguel Niño Zarazúa
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
29
63
4,390
Development Economics
Social Protection
Poverty
Inequality
Political Economy
Ruediger Kuehr
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
29
40
10,586
E-waste
Sustainable Production
Consumption and Disposal
Technology Transfer
Environmental Policies
Fred Gault
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
26
40
2,685
Gerald Forkuor
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
25
29
2,759
Remote Sensing/GIS
Environment
Water Resources
Agriculture
Climate Change
Hiroshan Hettiarachchi
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
24
36
3,170
sustainability
waste management
circular economy
geotechnical engineering
Bruno Martorano
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
24
45
2,283
Inequality
Political Economics
Development Economics
Micheline Goedhuys
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
22
36
3,947
firm growth innovation entrepreneurship employment empowerment developing countries
Elias Ayuk
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
22
31
1,838
Natural resources management
poverty analysis
capacity building
agricultural economics
Feng Wang
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
21
25
3,975
Lili Wang
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
21
30
1,692
Economics of science
Emerging technologies
Digitalisation and society
Green transition and
Ludovico Alcorta
United Nations University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
21
31
1,579