Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Architecture and Design, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
![Julia Pongratz](https://cdn.adscientificindex.com/pictures/e5/1761813.jpg)
climate change
carbon cycle
Earth system modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,684
28,377
0.795
![Jan Petzold](https://cdn.adscientificindex.com/pictures/8d/1784319.jpg)
climate change
small islands
island studies
social capital
geography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,021
5,868
0.975
* Last 6 Years Citation Counts Rankings
![Ralf Ludwig](https://cdn.adscientificindex.com/pictures/49/4987445.jpg)
Physical Geography
Hydrology
Climate Science
Environmental Modeling
Remote Sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,257
4,075
0.651
* Last 6 Years Citation Counts Rankings
![Martin Dohrmann](https://cdn.adscientificindex.com/pictures/f7/1761950.jpg)
Evolution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,554
1,428
0.559
* Last 6 Years Citation Counts Rankings
![Adriana López Arbarello](https://cdn.adscientificindex.com/pictures/b0/1762021.jpg)
Evolution
Systematics
Phylogeny
Palaeontology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,446
553
0.382
* Last 6 Years Citation Counts Rankings
![David Gampe](https://cdn.adscientificindex.com/pictures/b5/4568698.jpg)
Climate Change
Biosphere-Atmosphere-Interactions
Climate Extremes
Ecosystem Productivity
Climate Extremes & Health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
526
482
0.916
* Last 6 Years Citation Counts Rankings
![Paul Martin Ayris](https://cdn.adscientificindex.com/pictures/75/1762101.jpg)
Environmental impacts of ashfall
In-plume processing of ash
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
442
0.610
* Last 6 Years Citation Counts Rankings
![Michael Wack](https://cdn.adscientificindex.com/pictures/77/4575300.jpg)
Magnetism
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
275
176
0.640
Julia Pongratz
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,684
28,377
0.795
climate change
carbon cycle
Earth system modeling
Jan Petzold
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,021
5,868
0.975
climate change
small islands
island studies
social capital
geography
Ralf Ludwig
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,257
4,075
0.651
Physical Geography
Hydrology
Climate Science
Environmental Modeling
Remote Sensing
Martin Dohrmann
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,554
1,428
0.559
Adriana López Arbarello
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,446
553
0.382
Evolution
Systematics
Phylogeny
Palaeontology
David Gampe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
526
482
0.916
Climate Change
Biosphere-Atmosphere-Interactions
Climate Extremes
Ecosystem Productivity
Climate Extremes & Health
Paul Martin Ayris
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
442
0.610
Environmental impacts of ashfall
In-plume processing of ash
Michael Wack
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
275
176
0.640