Geir Johnsen
Impact in
- Oceanography top 0.2%
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Marine and coastal plant biology
- Environmental Chemistry top 0.5%
- Aquatic Ecosystems and Phytoplankton Dynamics
Papers in
- Oceanography 86
- Marine and coastal ecosystems 63
- Marine Biology and Ecology Research 21
- Marine and coastal plant biology 21
- Ecology 61
- Microbial Community Ecology and Physiology 15
- Marine animal studies overview 14
- Isotope Analysis in Ecology 14
- Co-authors
- Egil Sakshaug (16 shared papers)Per J. Jakobsen (9 shared papers)Jørgen Berge (28 shared papers)Martin Ludvigsen (19 shared papers)Kjersti Andresen (5 shared papers)Kasper Hancke (8 shared papers)Einar Skarstad Egeland (2 shared papers)Carole A. Llewellyn (1 shared paper)
- Journals
- Journal of Phycology (11 papers)Marine Ecology Progress Series (8 papers)Polar Biology (8 papers)PLoS ONE (6 papers)Scientific Reports (5 papers)
- Partner nations
- NorwayUnited StatesUnited Kingdom
In The Last Decade
Geir Johnsen
140 papers receiving 5.1k citations
Peers
Comparison fields: 5 of 145
- Oceanography 3.0k
- Environmental Chemistry 957
- Ecology 2.0k
- Renewable Energy, Sustainability and the Environment 716
- Global and Planetary Change 829
Countries citing papers authored by Geir Johnsen
This map shows the geographic impact of Geir Johnsen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Geir Johnsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Geir Johnsen more than expected).
Fields of papers citing papers by Geir Johnsen
This network shows the impact of papers produced by Geir Johnsen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Geir Johnsen. The network helps show where Geir Johnsen may publish in the future.
Co-authors
The 25 scholars most cited alongside Geir Johnsen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 145 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | 2011 | 262 | |
| 2 | 2005 | 216 | |
| 3 | 2009 | 204 | |
| 4 | 1997 | 167 | |
| 5 | 2007 | 158 | |
| 6 | 2015 | 153 | |
| 7 | 2008 | 152 | |
| 8 | 1987 | 148 | |
| 9 | 2008 | 135 | |
| 10 | 1994 | 112 | |
| 11 | 1993 | 110 | |
| 12 | 2013 | 104 | |
| 13 | 1997 | 100 | |
| 14 | 2005 | 92 | |
| 15 | 2002 | 90 | |
| 16 | 2021 | 86 | |
| 17 | 2018 | 81 | |
| 18 | 1991 | 80 | |
| 19 | 2018 | 78 | |
| 20 | 2007 | 76 |
About Geir Johnsen
Geir Johnsen is a scholar working on Oceanography, Ecology, Global and Planetary Change, Molecular Biology and Environmental Chemistry, having authored 145 papers that have together received 5.4k indexed citations. Recurring topics across this work include Marine and coastal ecosystems (63 papers), Marine Biology and Ecology Research (21 papers), Marine and coastal plant biology (21 papers), Algal biology and biofuel production (16 papers), Microbial Community Ecology and Physiology (15 papers), Marine animal studies overview (14 papers), Isotope Analysis in Ecology (14 papers) and Aquatic Ecosystems and Phytoplankton Dynamics (11 papers). The work is most often cited by research in Oceanography (3.0k citations), Environmental Chemistry (957 citations), Ecology (2.0k citations), Renewable Energy, Sustainability and the Environment (716 citations) and Global and Planetary Change (829 citations). Geir Johnsen has collaborated with scholars based in Norway, United States and United Kingdom. Frequent co-authors include Egil Sakshaug, Per J. Jakobsen, Jørgen Berge, Martin Ludvigsen, Kjersti Andresen, Kasper Hancke, Einar Skarstad Egeland, Carole A. Llewellyn, Suzanne Roy and Oscar Schofield. Their work appears in journals such as Journal of Phycology, Marine Ecology Progress Series, Polar Biology, PLoS ONE and Scientific Reports.
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.