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Researcher · Norwegian University of Science and Technology · Norway

Geir Helge Johnsen

Geir Helge Johnsen publishes mostly in Oceanography, Ecology and Global and Planetary Change, on topics such as Marine and coastal ecosystems, Marine and coastal plant biology and Marine Biology and Ecology Research.

ORCID 0000-0002-2463-5903 OpenAlex
World rank
#261,281
of 7,710,434 ranked researchers
Rank in Norway
#1,513
of 33,005
Works
198
Citations
8.2k
Citations per work
41.6
h-index
53
i10-index 133Top 2.3% in Oceanography
Geir Helge Johnsen

What does Geir Helge Johnsen research?

Geir Helge Johnsen's work is mostly in Earth and Planetary Sciences (28%), Environmental Science (26%), Biochemistry, Genetics and Molecular Biology (5%).

Physical Sciences: 115 works · 58.3% of their workEarth and Planetary Sciences: 56 works · 28.2% of their workOceanography: 56 works · 28.2% of their workEnvironmental Science: 52 works · 26.1% of their workEcology: 32 works · 16.1% of their workGlobal and Planetary Change: 12 works · 6.0% of their workEnvironmental Chemistry: 8 works · 4.0% of their workEnergy: 8 works · 4.0% of their workRenewable Energy, Sustainability and the Environment: 8 works · 4.0% of their workEverything else: 72 works · 36.3% of their workLife Sciences: 11 works · 5.4% of their workBiochemistry, Genetics and Molecular Biology: 11 works · 5.4% of their workMolecular Biology: 11 works · 5.4% of their workTHEIR WORKGeir HelgeJohnsen198works
Life Sciences5%Physical Sciences58%

Their six largest subfields, inside their fields and domains; the grey slice is everything else they publish. The interactive view splits every one of their works down to single topics.

The fields and subfields, with their numbers
    1. Earth and Planetary Sciences5628.2%
    2. Environmental Science5226.1%
    3. Energy84.0%
  2. Everything else7236.3%
    1. Biochemistry, Genetics and Molecular Biology115.4%
  1. 1Oceanography28% of their works
  2. 2Ecology16% of their works
  3. 3Global and Planetary Change6% of their works
  4. 4Molecular Biology5% of their works
  5. 5Renewable Energy, Sustainability and the Environment4% of their works
  6. 6Environmental Chemistry4% of their works

Research topics

Which keywords describe Geir Helge Johnsen's research?

The keywords of their largest research topics: Climate Change, Eutrophication, Harmful Algal Blooms, Dissolved Organic Matter, Oceanic Carbon Cycle, Benthic Communities, Marine Biodiversity and Kelp Forests.

Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most.

All 21 words, with their numbers
  1. Climate Change1083 topics
  2. Eutrophication902 topics
  3. Harmful Algal Blooms902 topics
  4. Dissolved Organic Matter761 topic
  5. Oceanic Carbon Cycle761 topic
  6. Benthic Communities512 topics
  7. Marine Biodiversity512 topics
  8. Kelp Forests261 topic
  9. Seagrasses261 topic
  10. Deep-Sea Ecology251 topic
  11. Ecosystem Functioning251 topic
  12. Stable Isotopes211 topic
  13. Trophic Position211 topic
  14. Biodiesel201 topic
  15. Microalgae201 topic
  16. Anthropogenic Noise181 topic
  17. Marine Mammals181 topic
  18. Marine Microbes171 topic
  19. Microbial Biogeography171 topic
  20. Cyanobacteria141 topic
  21. Nutrient Control141 topic

Where does Geir Helge Johnsen work?

Geir Helge Johnsen's main affiliation in the publication record is Norwegian University of Science and Technology, Norway.

How many publications and citations does Geir Helge Johnsen have?

OpenAlex counts 198 works and 8,230 citations for Geir Helge Johnsen, an h-index of 53, ranking #261,281 of 7,710,434 researchers worldwide on the quality score.

Ranked on field-normalised excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.

Papers, co-authors, who cited this work and researchers on the nearest topics have tabs of their own, above. Is this your page? Claim it with your ORCID iD, or request a correction or removal.

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