Citation Rankings
Highly Cited Researchers

Universität Hamburg Highly Cited Researchers CitationNatural Sciences / Geography Rankings 2025

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 IndexUniversities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025

* Total Citation Counts Rankings
Ranking Based On Selection :1
Germany
Jürgen Scheffran
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
Germany
Jürgen Böhner
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
Germany
Parnreiter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,942
808
0.275
* Total Citation Counts Rankings
Ranking Based On Selection :4
Germany
Beate Ratter
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
Germany
Cormac Walsh
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
Germany
Christin Bernhold
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
69
0.873
* Total Citation Counts Rankings
Rankings
64,420
Germany
2,836
51
Ranking Based On Selection: 1
Jürgen Scheffran
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
* Total Citation Counts Rankings
Rankings
65,639
Germany
2,889
53
Ranking Based On Selection: 2
Jürgen Böhner
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,639
9,743
0.714
Physical Geography
Climatology
GIS
Remote Sensing
* Total Citation Counts Rankings
Rankings
320,058
Germany
12,325
269
Ranking Based On Selection: 3
Parnreiter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,942
808
0.275
* Total Citation Counts Rankings
Rankings
323,368
Germany
12,432
271
Ranking Based On Selection: 4
Beate Ratter
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
* Total Citation Counts Rankings
Rankings
746,653
Germany
25,308
523
Ranking Based On Selection: 5
Cormac Walsh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
799
527
0.660
maritime spatial planning
marine conservation
protected area management
transboundary governance
* Total Citation Counts Rankings
Rankings
1,650,972
Germany
54,359
1,020
Ranking Based On Selection: 6
Christin Bernhold
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
69
0.873