Robert P. Speijer

8.0k total citations
128 papers, 3.8k citations indexed

About

Robert P. Speijer is a scholar working on Atmospheric Science, Paleontology and Oceanography. According to data from OpenAlex, Robert P. Speijer has authored 128 papers receiving a total of 3.8k indexed citations (citations by other indexed papers that have themselves been cited), including 104 papers in Atmospheric Science, 61 papers in Paleontology and 55 papers in Oceanography. Recurrent topics in Robert P. Speijer's work include Geology and Paleoclimatology Research (104 papers), Paleontology and Stratigraphy of Fossils (51 papers) and Marine Biology and Ecology Research (41 papers). Robert P. Speijer is often cited by papers focused on Geology and Paleoclimatology Research (104 papers), Paleontology and Stratigraphy of Fossils (51 papers) and Marine Biology and Ecology Research (41 papers). Robert P. Speijer collaborates with scholars based in Belgium, Germany and Netherlands. Robert P. Speijer's co-authors include Christian Scheibner, Birger Schmitz, Peter Stassen, Étienne Steurbaut, Abdel-Mohsen M. Morsi, André Bornemann, G.J. van der Zwaan, Joen G.V. Widmark, Ellen Thomas and Tanja J. Kouwenhoven and has published in prestigious journals such as Nature Communications, PLoS ONE and Earth and Planetary Science Letters.

In The Last Decade

Robert P. Speijer

125 papers receiving 3.6k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Robert P. Speijer Belgium 38 3.1k 2.3k 1.3k 959 714 128 3.8k
Thomas Westerhold Germany 35 3.9k 1.3× 2.6k 1.1× 937 0.7× 1.0k 1.1× 707 1.0× 100 4.6k
Torsten Bickert Germany 35 3.0k 1.0× 1.4k 0.6× 939 0.7× 1.1k 1.2× 886 1.2× 69 3.7k
Bridget S. Wade United Kingdom 34 3.9k 1.3× 2.4k 1.1× 1.4k 1.1× 1.3k 1.3× 715 1.0× 102 4.9k
Christopher J. Hollis New Zealand 33 2.5k 0.8× 1.7k 0.7× 790 0.6× 744 0.8× 510 0.7× 99 3.6k
Eliana Fornaciari Italy 28 2.7k 0.9× 1.7k 0.8× 813 0.6× 658 0.7× 710 1.0× 93 3.5k
Helen K. Coxall Sweden 28 3.1k 1.0× 1.8k 0.8× 1.1k 0.8× 1.1k 1.1× 447 0.6× 76 3.8k
Isabella Premoli Silvá Italy 30 2.8k 0.9× 2.6k 1.2× 755 0.6× 504 0.5× 641 0.9× 61 3.7k
W.J. Zachariasse Netherlands 40 4.2k 1.4× 1.7k 0.8× 1.4k 1.1× 1.2k 1.3× 1.2k 1.7× 68 5.2k
Wolfgang Oschmann Germany 33 1.6k 0.5× 2.0k 0.9× 858 0.7× 1.0k 1.1× 706 1.0× 59 3.9k
Hans R. Thierstein Switzerland 29 2.3k 0.7× 1.5k 0.7× 1.5k 1.1× 1.0k 1.1× 520 0.7× 45 3.5k

Countries citing papers authored by Robert P. Speijer

Since Specialization
Citations

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

Fields of papers citing papers by Robert P. Speijer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert P. Speijer. 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 Robert P. Speijer. The network helps show where Robert P. Speijer may publish in the future.

Co-authorship network of co-authors of Robert P. Speijer

This figure shows the co-authorship network connecting the top 25 collaborators of Robert P. Speijer. A scholar is included among the top collaborators of Robert P. Speijer 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 Robert P. Speijer. Robert P. Speijer 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.
Winter, Niels J. de, et al.. (2025). A European monsoon-like climate in a warmhouse world. Nature Communications. 16(1). 9207–9207.
2.
Vellekoop, Johan, Philippe Claeys, Linda C. Ivany, et al.. (2024). Making sense of variation in sclerochronological stable isotope profiles of mollusks and fish otoliths from the early Eocene southern North Sea Basin. Palaeogeography Palaeoclimatology Palaeoecology. 659. 112627–112627. 1 indexed citations
3.
4.
Vellekoop, Johan, Pim Kaskes, Matthias Sinnesael, et al.. (2022). The benthic foraminiferal response to the mid-Maastrichtian event in the NW-European chalk sea of the Maastrichtian type area. Netherlands Journal of Geosciences – Geologie en Mijnbouw. 101. 5 indexed citations
5.
Vellekoop, Johan, et al.. (2022). Hydrological differences between the Lutetian Paris and Hampshire basins revealed by stable isotopes of conid gastropods. Bulletin de la Société Géologique de France. 193. 3–3. 5 indexed citations
6.
Babila, Tali L., Donald E. Penman, Christopher D. Standish, et al.. (2022). Surface ocean warming and acidification driven by rapid carbon release precedes Paleocene-Eocene Thermal Maximum. Science Advances. 8(11). eabg1025–eabg1025. 33 indexed citations
7.
8.
Winter, Niels J. de, et al.. (2020). The Giant Marine Gastropod Campanile Giganteum (Lamarck, 1804) as a High‐Resolution Archive of Seasonality in the Eocene Greenhouse World. Geochemistry Geophysics Geosystems. 21(4). 25 indexed citations
9.
10.
Vellekoop, Johan, Lineke Woelders, Appy Sluijs, Kenneth G. Miller, & Robert P. Speijer. (2019). Phytoplankton community disruption caused by latest Cretaceous global warming. Biogeosciences. 16(21). 4201–4210. 18 indexed citations
11.
Vellekoop, Johan, et al.. (2019). Type‐Maastrichtian gastropod faunas show rapid ecosystem recovery following the Cretaceous–Palaeogene boundary catastrophe. Palaeontology. 63(2). 349–367. 15 indexed citations
12.
Winter, Niels J. de, Johan Vellekoop, Jeroen Soete, et al.. (2018). An assessment of latest Cretaceous Pycnodonte vesicularis (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation. Climate of the past. 14(6). 725–749. 29 indexed citations
13.
Woelders, Lineke, Johan Vellekoop, Gert Jan Weltje, et al.. (2018). Robust multi-proxy data integration, using late Cretaceous paleotemperature records as a case study. Earth and Planetary Science Letters. 500. 215–224. 28 indexed citations
14.
Woelders, Lineke, Johan Vellekoop, Dick Kroon, et al.. (2017). Latest Cretaceous climatic and environmental change in the South Atlantic region. Paleoceanography. 32(5). 466–483. 55 indexed citations
15.
Vellekoop, Johan, Lineke Woelders, Sanem Açıkalın, et al.. (2017). Ecological response to collapse of the biological pump following the mass extinction at the Cretaceous–Paleogene boundary. Biogeosciences. 14(4). 885–900. 29 indexed citations
16.
Pirkenseer, Claudius, Étienne Steurbaut, Hemmo A. Abels, Chris King, & Robert P. Speijer. (2013). An expanded lower Eocene shelf sequence from the eastern Aquitaine Basin, SW France: biostratigraphy, biofacies, and stable carbon and oxygen isotopes. Newsletters on Stratigraphy. 46(3). 339–361. 3 indexed citations
17.
Speijer, Robert P., Christian Scheibner, Peter Stassen, & Abdel-Mohsen M. Morsi. (2012). Response of marine ecosystems to deep-time global warming: a synthesis of biotic patterns across the Paleocene-Eocene thermal maximum (PETM). Lirias (KU Leuven). 85 indexed citations
18.
Stassen, Peter, et al.. (2012). Intra- and intertaxon stable O and C isotope variability of fossil fish otoliths: an early Eocene test case. Lirias (KU Leuven). 7 indexed citations
19.
20.
Speijer, Robert P., et al.. (1996). Stable isotope (delta O-18,delta C-13) records across the Cretaceous/Tertiary boundary at Geulhemmerberg, southern Netherlands. Netherlands Journal of Geosciences – Geologie en Mijnbouw. 75. 245–253. 2 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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