Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Climate-Migration-Conflict
Energy-Water-Food Nexus
Rural-Urban-Coastal Relations
Complexity-Stability-Sustainability
ABM
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,836
9,207
0.665
* Total Citation Counts Rankings
Ranking Based On Selection :2
Physical Geography
Climatology
GIS
Remote Sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,639
9,743
0.714
* Total Citation Counts Rankings
Ranking Based On Selection :3
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,942
808
0.275
* Total Citation Counts Rankings
Ranking Based On Selection :4
Climate Change Adaptation
Island Studies
Integrative Geographie
Complexity Theory
Coastal Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,904
1,807
0.622
* Total Citation Counts Rankings
Ranking Based On Selection :5
maritime spatial planning
marine conservation
protected area management
transboundary governance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
799
527
0.660
* Total Citation Counts Rankings
Ranking Based On Selection :6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
69
0.873
Jürgen Scheffran
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,836
9,207
0.665
Climate-Migration-Conflict
Energy-Water-Food Nexus
Rural-Urban-Coastal Relations
Complexity-Stability-Sustainability
ABM
Jürgen Böhner
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,639
9,743
0.714
Physical Geography
Climatology
GIS
Remote Sensing
Parnreiter
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,942
808
0.275
Beate Ratter
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,904
1,807
0.622
Climate Change Adaptation
Island Studies
Integrative Geographie
Complexity Theory
Coastal Management
Cormac Walsh
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
799
527
0.660
maritime spatial planning
marine conservation
protected area management
transboundary governance
Christin Bernhold
Universität Hamburg
Hamburg, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
69
0.873