Top 100 Scientists

World Top 100 Scientists 2026

The Top 100 scientists are ranked based on total H-index scores at the global, regional, national, and institutional levels. Rankings cover 10 regions, 13 main fields, and 221 subfields. Subject field rankings (at world, region, country, and university levels) are currently in Beta version and updated in near real-time.
Note: Researchers classified as "others" (currently 1,122,060 profiles whose fields are undetermined or unedited) are excluded from subject and regional rankings. These rankings will dynamically evolve as the “others” profiles are reviewed and properly categorized.

Country

* Total H Index Rankings

Rankings

491

World Rank

174

Country Rank

University

Ranking Based On Selection:

Menachem Elimelech

Rice University Houston, United States

Engineering & Technology / Environmental Science & Engineering
environmental engineering | membrane separations | environmental nanotechnology | desalination | wate

H-Index Metrics

H-Index

215
i10 Index

580
Citation Counts

168,703

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* Total H Index Rankings

Rankings

909

World Rank

Country Rank

University

Ranking Based On Selection:

Pete Smith

University of Aberdeen Aberdeen, United Kingdom

Engineering & Technology / Environmental Science & Engineering
Global change | soils | carbon | climate change | mitigatio

H-Index Metrics

H-Index

184
i10 Index

874
Citation Counts

145,906

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* Total H Index Rankings

Rankings

1,001

World Rank

Country Rank

University

Ranking Based On Selection:

Zhanhu Guo

Northumbria University Newcastle upon Tyne, United Kingdom

Engineering & Technology / Environmental Science & Engineering
Polymer nanocomposites | Conducting Polymers | Sustainability | Environmental Engineering | Electronic

H-Index Metrics

H-Index

179
i10 Index

1,029
Citation Counts

110,716

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* Total H Index Rankings

Rankings

1,028

World Rank

399

Country Rank

University

Ranking Based On Selection:

Robert B Jackson

Stanford University Stanford, United States

Engineering & Technology / Environmental Science & Engineering
biogeochemistry | ecology | environmental science | climate change | ecohydrolog

H-Index Metrics

H-Index

178
i10 Index

507
Citation Counts

177,606

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* Total H Index Rankings

Rankings

1,123

World Rank

Country Rank

University

Ranking Based On Selection:

Philip Jones

University of East Anglia Norwich, United Kingdom

Engineering & Technology / Environmental Science & Engineering
Climate | Climate Change | Paleoclimat

H-Index Metrics

H-Index

174
i10 Index

586
Citation Counts

168,532

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* Total H Index Rankings

Rankings

1,167

World Rank

465

Country Rank

University

Ranking Based On Selection:

Bruce E Logan

Pennsylvania State University University Park, United States

Engineering & Technology / Environmental Science & Engineering
Microbial fuel cells | microbial electrolysis cells | thermal batteries | desalination | water electrolyzer

H-Index Metrics

H-Index

173
i10 Index

554
Citation Counts

126,009

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* Total H Index Rankings

Rankings

1,222

World Rank

Country Rank

University

Ranking Based On Selection:

Detlef P. Van Vuuren

Netherlands Environmental Assessment Agency Hague, Netherlands

Engineering & Technology / Environmental Science & Engineering
integrated assessment | climate change | environmental science | global change | sustainable developmen

H-Index Metrics

H-Index

169
i10 Index

588
Citation Counts

198,672

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* Total H Index Rankings

Rankings

1,232

World Rank

499

Country Rank

University

Ranking Based On Selection:

Christopher B Field

Stanford University Stanford, United States

Engineering & Technology / Environmental Science & Engineering
climate change | ecology | carbon cycle | leaf nitroge

H-Index Metrics

H-Index

169
i10 Index

392
Citation Counts

172,411

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* Total H Index Rankings

Rankings

1,251

World Rank

Country Rank

University

Ranking Based On Selection:

Yong-Guan Zhu

Institute of Urban Environment, Chinese Academy of Sciences Xiamen, China

Engineering & Technology / Environmental Science & Engineering
Environmental Soil Science & Biogeochemistr

H-Index Metrics

H-Index

170
i10 Index

785
Citation Counts

106,672

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* Total H Index Rankings

Rankings

1,478

World Rank

609

Country Rank

University

Ranking Based On Selection:

Baoshan Xing

University of Massachusetts Amherst Amherst, United States

Engineering & Technology / Environmental Science & Engineering
Environmental & soil chemistry | adsorption | nanoparticles | microplastics | food safet

H-Index Metrics

H-Index

161
i10 Index

916
Citation Counts

108,792

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* Total H Index Rankings

Rankings

1,703

World Rank

Country Rank

University

Ranking Based On Selection:

Michael Brauer

University of British Columbia Vancouver, Canada

Engineering & Technology / Environmental Science & Engineering
air pollution | environmental health | environmental epidemiology | built environmen

H-Index Metrics

H-Index

155
i10 Index

459
Citation Counts

191,202

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* Total H Index Rankings

Rankings

1,771

World Rank

140

Country Rank

University

Ranking Based On Selection:

Kevin C Jones

Lancaster University Lancaster, United Kingdom

Engineering & Technology / Environmental Science & Engineering
Environmental behaviour and effects of organic contaminants | passive sampling technique

H-Index Metrics

H-Index

154
i10 Index

837
Citation Counts

95,043

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* Total H Index Rankings

Rankings

1,993

World Rank

161

Country Rank

University

Ranking Based On Selection:

Kevin Jones

Lancaster University Lancaster, United Kingdom

Engineering & Technology / Environmental Science & Engineering
Environmental scienc

H-Index Metrics

H-Index

150
i10 Index

747
Citation Counts

81,777

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* Total H Index Rankings

Rankings

2,067

World Rank

Country Rank

University

Ranking Based On Selection:

Ravi Naidu

University of South Australia Adelaide, Australia

Engineering & Technology / Environmental Science & Engineering
environmental science | pollution | risk and remediatio

H-Index Metrics

H-Index

148
i10 Index

945
Citation Counts

92,084

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* Total H Index Rankings

Rankings

2,069

World Rank

Country Rank

University

Ranking Based On Selection:

Peter Verburg

VU University of Amsterdam Amsterdam, Netherlands

Engineering & Technology / Environmental Science & Engineering
land use change | global environmental change | geography | land use | land cove

H-Index Metrics

H-Index

148
i10 Index

476
Citation Counts

74,787

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* Total H Index Rankings

Rankings

2,123

World Rank

Country Rank

University

Ranking Based On Selection:

Sonia I Seneviratne

Eidgenössische Technische Hochschule ETH Zürich Zurich, Switzerland

Engineering & Technology / Environmental Science & Engineering
climate change | land-climate dynamics | climate extreme

H-Index Metrics

H-Index

147
i10 Index

355
Citation Counts

108,088

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* Total H Index Rankings

Rankings

2,347

World Rank

Country Rank

University

Ranking Based On Selection:

Mika Sillanpää

King Saud University Riyadh, Saudi Arabia

Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Green Chemistry | Chemical Engineering | Water Treatment | Environmenta

H-Index Metrics

H-Index

144
i10 Index

1,073
Citation Counts

101,742

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* Total H Index Rankings

Rankings

2,402

World Rank

1,051

Country Rank

University

Ranking Based On Selection:

John C Wingfield

University of California Davis Davis, United States

Engineering & Technology / Environmental Science & Engineering
Environmental endocrinolog

H-Index Metrics

H-Index

144
i10 Index

518
Citation Counts

75,331

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* Total H Index Rankings

Rankings

2,493

World Rank

Country Rank

University

Ranking Based On Selection:

Jun Ma 马军

Harbin Institute of Technology Harbin, China

Engineering & Technology / Environmental Science & Engineering
Water Treatment Processes | Environmental Nanotechnology | Advanced Oxidation | Membrane Technolog