Total 2,424,675 scientists, country 221, and institutions 24,468 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
![David Vanko](https://cdn.adscientificindex.com/pictures/ee/1732329.jpg)
Geosciences
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
14
0.326
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Wendy Nelson](/user/assets/images/profile/no-profile-photo.png)
geology (igneous petrology and geochemistry)
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
22
16
0.727
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Joel Moore](https://cdn.adscientificindex.com/pictures/ec/1734875.jpg)
geochemistry
biogeochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
17
0.944
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Martin C Roberge](/user/assets/images/profile/no-profile-photo.png)
geomorphology
hydrology
education
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
2
0.250
* Total i10 IndexRankings
Ranking Based On Selection: 5
![George Guice](https://cdn.adscientificindex.com/pictures/0b/5196079.jpg)
Geology
Geochemistry
Archean
Petrology
Economic Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
5
1.000
David Vanko
Towson University
Towson, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
14
0.326
Wendy Nelson
Towson University
Towson, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
22
16
0.727
geology (igneous petrology and geochemistry)
Joel Moore
Towson University
Towson, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
17
0.944
geochemistry
biogeochemistry
Martin C Roberge
Towson University
Towson, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
2
0.250
geomorphology
hydrology
education
George Guice
Towson University
Towson, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
5
1.000
Geology
Geochemistry
Archean
Petrology
Economic Geology