Øyvind Hammer

24.1k total citations · 2 hit papers
124 papers, 19.9k citations indexed

About

Øyvind Hammer is a scholar working on Paleontology, Atmospheric Science and Oceanography. According to data from OpenAlex, Øyvind Hammer has authored 124 papers receiving a total of 19.9k indexed citations (citations by other indexed papers that have themselves been cited), including 62 papers in Paleontology, 41 papers in Atmospheric Science and 22 papers in Oceanography. Recurrent topics in Øyvind Hammer's work include Paleontology and Stratigraphy of Fossils (45 papers), Geology and Paleoclimatology Research (41 papers) and Methane Hydrates and Related Phenomena (20 papers). Øyvind Hammer is often cited by papers focused on Paleontology and Stratigraphy of Fossils (45 papers), Geology and Paleoclimatology Research (41 papers) and Methane Hydrates and Related Phenomena (20 papers). Øyvind Hammer collaborates with scholars based in Norway, United States and United Kingdom. Øyvind Hammer's co-authors include David A. T. Harper, Paul D. Ryan, Henrik H. Svensen, Hugo Bucher, Bjørn Jamtveit, Sverre Planke, Fernando Corfú, Stéphane Polteau, Hans Arne Nakrem and Dag Kristian Dysthe and has published in prestigious journals such as Science, Journal of Geophysical Research Atmospheres and PLoS ONE.

In The Last Decade

Øyvind Hammer

121 papers receiving 19.0k citations

Hit Papers

PAST: PALEONTOLOGICAL STATISTICAL SOFTWARE PACKAGE FOR ED... 2001 2026 2009 2017 2001 2005 5.0k 10.0k 15.0k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. PAST: PALEONTOLOGICAL STATISTICAL SOFTWARE PACKAGE FOR EDUCATION AND DATA ANALYSIS
    2001 16.7k citations Øyvind Hammer, David A. T. Harper et al. Palaeontologia Electronica profile →
  2. PAST - PAlaeontological STatistics, ver. 1.34
    2005 317 citations Øyvind Hammer profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Øyvind Hammer Norway 32 6.0k 3.9k 3.4k 3.1k 2.9k 124 19.9k
Paul D. Ryan Ireland 24 5.5k 0.9× 3.1k 0.8× 3.1k 0.9× 3.0k 1.0× 2.2k 0.8× 56 18.5k
David A. T. Harper United Kingdom 48 6.5k 1.1× 9.6k 2.5× 3.6k 1.0× 3.1k 1.0× 5.7k 1.9× 364 26.0k
Katherine J. Willis United Kingdom 61 4.6k 0.8× 2.1k 0.5× 3.3k 1.0× 2.5k 0.8× 4.9k 1.7× 229 16.6k
Charles E. Mitchell United States 45 3.2k 0.5× 2.1k 0.5× 2.6k 0.8× 3.0k 1.0× 1.3k 0.4× 262 12.9k
Robert J. Whittaker United Kingdom 63 6.7k 1.1× 1.5k 0.4× 5.6k 1.6× 2.0k 0.6× 1.5k 0.5× 234 17.4k
Brian Huntley United Kingdom 70 9.0k 1.5× 2.4k 0.6× 6.0k 1.8× 2.7k 0.9× 7.7k 2.6× 221 25.5k
Alexandre Antonelli Sweden 57 3.2k 0.5× 2.7k 0.7× 6.9k 2.0× 2.3k 0.7× 872 0.3× 247 15.2k
Carlos Jaramillo Panama 50 2.0k 0.3× 3.8k 1.0× 4.3k 1.3× 809 0.3× 1.6k 0.5× 274 11.8k
Anne Chao Taiwan 53 11.0k 1.9× 1.2k 0.3× 6.6k 1.9× 3.5k 1.1× 661 0.2× 138 27.0k
Eske Willerslev Denmark 86 11.7k 2.0× 4.1k 1.1× 1.6k 0.5× 1.2k 0.4× 2.0k 0.7× 238 24.6k

Countries citing papers authored by Øyvind Hammer

Since Specialization
Citations

This map shows the geographic impact of Øyvind Hammer'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 Øyvind Hammer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Øyvind Hammer more than expected).

Fields of papers citing papers by Øyvind Hammer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Øyvind Hammer. 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 Øyvind Hammer. The network helps show where Øyvind Hammer may publish in the future.

Co-authorship network of co-authors of Øyvind Hammer

This figure shows the co-authorship network connecting the top 25 collaborators of Øyvind Hammer. A scholar is included among the top collaborators of Øyvind Hammer based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Øyvind Hammer. Øyvind Hammer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kear, Benjamin P., et al.. (2025). Earliest oceanic tetrapod ecosystem reveals rapid complexification of Triassic marine communities. Science. 390(6774). 722–727. 1 indexed citations
2.
Schneebeli‐Hermann, Elke, et al.. (2024). Palaeoenvironmental variability and carbon cycle perturbations during the Smithian-Spathian (Early Triassic) in Central Spitsbergen. Lethaia. 57(2). 1–14. 3 indexed citations
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Little, Crispin T. S., et al.. (2023). Bivalve-barnacle pseudoplanktonic colonisation of wood from the Toarcian, Lower Jurassic, Strawberry Bank Lagerstätte, Somerset UK. Acta Palaeontologica Polonica. 68. 4 indexed citations
7.
Dupret, Vincent, Øyvind Hammer, Kenneth T. Higgs, et al.. (2023). Non-tetrapod sarcopterygians from the Valentia Slate Formation (Givetian, Devonian) of the Iveragh Peninsula, south-western Ireland: systematic reappraisal and palaeobiogeographic implications. Spanish Journal of Palaeontology. 38(1). 37–45. 1 indexed citations
8.
Hammer, Øyvind, et al.. (2023). Exceptional X-Ray contrast: Radiography imaging of a Middle Triassic mixosaurid from Svalbard. PLoS ONE. 18(5). e0285939–e0285939. 2 indexed citations
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Petri, Benoît, Bjarne Almqvist, William McCarthy, et al.. (2021). Decrypting Magnetic Fabrics (AMS, AARM, AIRM) Through the Analysis of Mineral Shape Fabrics and Distribution Anisotropy. Journal of Geophysical Research Solid Earth. 126(6). 12 indexed citations
11.
Burchardt, Steffi, Olivier Galland, Bjarne Almqvist, et al.. (2019). Progressive Growth of the Cerro Bayo Cryptodome, Chachahuén Volcano, Argentina—Implications for Viscous Magma Emplacement. Journal of Geophysical Research Solid Earth. 124(8). 7934–7961. 25 indexed citations
12.
Haverkamp, Thomas, Øyvind Hammer, & Kjetill S. Jakobsen. (2014). Linking Geology and Microbiology: Inactive Pockmarks Affect Sediment Microbial Community Structure. PLoS ONE. 9(1). e85990–e85990. 13 indexed citations
13.
Hammer, Øyvind, et al.. (2013). Beak and skull shapes of human commensal and non-commensal house sparrows Passer domesticus. BMC Evolutionary Biology. 13(1). 200–200. 14 indexed citations
14.
Jamtveit, Bjørn & Øyvind Hammer. (2012). Section 7. Hierarchical Fracturing During Weathering and Serpentinisation. 1(3). 418–432. 6 indexed citations
15.
Jamtveit, Bjørn & Øyvind Hammer. (2012). Section 5. Replacement Processes. 1(3). 388–402. 1 indexed citations
16.
Gradstein, Felix M., et al.. (2010). Norwegian Offshore Stratigraphic Lexicon (NORLEX). EGU General Assembly Conference Abstracts. 8933. 1 indexed citations
17.
Jamtveit, Bjørn, et al.. (2005). Travertine formation and other pattern forming processes on sloping surfaces. GeCAS. 69(10). 2 indexed citations
18.
Hammer, Øyvind, David A. T. Harper, & Paul D. Ryan. (2001). PAST: PALEONTOLOGICAL STATISTICAL SOFTWARE PACKAGE FOR EDUCATION AND DATA ANALYSIS. Palaeontologia Electronica. 4(1). 1–9. 16725 indexed citations breakdown →
19.
Hammer, Øyvind. (2000). Spatial organization of tubercles and terrace lines in Paradoxides forchhammeri - evidence of lateral inhibition. Acta Palaeontologica Polonica. 45(3). 251–270. 10 indexed citations
20.
Hammer, Øyvind. (1998). Regulation of astogeny in halysitid tabulates. Acta Palaeontologica Polonica. 43(4). 635–651. 9 indexed citations

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.

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