Per Ahlberg

2.5k total citations
90 papers, 1.8k citations indexed

About

Per Ahlberg is a scholar working on Paleontology, Geology and Atmospheric Science. According to data from OpenAlex, Per Ahlberg has authored 90 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 85 papers in Paleontology, 35 papers in Geology and 30 papers in Atmospheric Science. Recurrent topics in Per Ahlberg's work include Paleontology and Stratigraphy of Fossils (84 papers), Geology and Paleoclimatology Research (30 papers) and Geological Studies and Exploration (22 papers). Per Ahlberg is often cited by papers focused on Paleontology and Stratigraphy of Fossils (84 papers), Geology and Paleoclimatology Research (30 papers) and Geological Studies and Exploration (22 papers). Per Ahlberg collaborates with scholars based in Sweden, United States and Germany. Per Ahlberg's co-authors include Mats E. Eriksson, Fredrik Terfelt, Loren E. Babcock, Jan Bergström, Jörg Maletz, Shanchi Peng, Stig M. Bergström, Birger Schmitz, Arne Thorshøj Nielsen and Maoyan Zhu and has published in prestigious journals such as Nature, Journal of the American Chemical Society and Scientific Reports.

In The Last Decade

Per Ahlberg

90 papers receiving 1.7k citations

Peers

Per Ahlberg
Małgorzata Moczydłowska Sweden
Jackie A. Lees United Kingdom
Jörg Maletz Germany
Jiayong Wei United States
Markus Aretz France
Mikhail Rogov Russia
Mats E. Eriksson Sweden
Weihong He China
Martin A. Pearce United Kingdom
Petr Štorch Czechia
Małgorzata Moczydłowska Sweden
Per Ahlberg
Citations per year, relative to Per Ahlberg Per Ahlberg (= 1×) peers Małgorzata Moczydłowska

Countries citing papers authored by Per Ahlberg

Since Specialization
Citations

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

Fields of papers citing papers by Per Ahlberg

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Per Ahlberg

This figure shows the co-authorship network connecting the top 25 collaborators of Per Ahlberg. A scholar is included among the top collaborators of Per Ahlberg 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 Per Ahlberg. Per Ahlberg 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.
Goswami, Vineet, Judith L. Hannah, Holly J. Stein, et al.. (2024). Re-Os geochronology and geochemical evolution of late Cambrian to Middle Ordovician Alum and Tøyen shales, Sweden. Global and Planetary Change. 242. 104580–104580. 1 indexed citations
2.
Young, Seth A., et al.. (2023). Progressive marine oxygenation and climatic cooling at the height of the Great Ordovician Biodiversification Event. Global and Planetary Change. 227. 104183–104183. 8 indexed citations
3.
4.
Maletz, Jörg & Per Ahlberg. (2021). Upper Darriwilian (Middle Ordovician) graptolite biostratigraphy and correlation of the Krapperup drill core, Scania, Sweden. GFF. 143(4). 360–383. 3 indexed citations
5.
6.
Nielsen, Arne Thorshøj, Magne Høyberget, & Per Ahlberg. (2020). The Furongian (upper Cambrian) Alum Shale of Scandinavia: revision of zonation. Lethaia. 53(4). 462–485. 23 indexed citations
7.
Bergström, Stig M., Mats E. Eriksson, & Per Ahlberg. (2020). Ordovician δ13C chemostratigraphy: A global review of major excursions and their ties to graptolite and conodont biostratigraphy. Lund University Publications (Lund University). 319–351. 9 indexed citations
8.
Harper, David A. T., Timothy P. Topper, Borja Cascales‐Miñana, et al.. (2019). The Furongian (late Cambrian) Biodiversity Gap: Real or apparent?. Palaeoworld. 28(1-2). 4–12. 51 indexed citations
9.
Lindgren, Johan, Dan-Eric Nilsson, Peter Sjövall, et al.. (2019). Fossil insect eyes shed light on trilobite optics and the arthropod pigment screen. Nature. 573(7772). 122–125. 26 indexed citations
10.
Lindskog, Anders, et al.. (2018). The Cambrian–Ordovician succession at Lanna, Sweden: stratigraphy and depositional environments; pp. 133–148. Proceedings of the Estonian Academy of Sciences Geology. 67(2). 133–148. 9 indexed citations
11.
Babcock, Loren E., Shanchi Peng, Maoyan Zhu, Shuhai Xiao, & Per Ahlberg. (2014). Proposed reassessment of the Cambrian GSSP. Journal of African Earth Sciences. 98. 3–10. 58 indexed citations
12.
Lehnert, Oliver, et al.. (2012). Multiple palaeokarst horizons in the Lower Palaeozoic of Baltoscandia challenging the dogma of a deep epicontinental sea. EGUGA. 11362. 7 indexed citations
13.
Terfelt, Fredrik, Per Ahlberg, & Mats E. Eriksson. (2010). Complete record of Furongian polymerid trilobites and agnostoids of Scandinavia – a biostratigraphical scheme. Lethaia. 44(1). 8–14. 47 indexed citations
14.
Terfelt, Fredrik, Mats E. Eriksson, Per Ahlberg, & Loren E. Babcock. (2008). Furongian Series (Cambrian) biostratigraphy of Scandinavia - a revision. Lund University Publications (Lund University). 88(1). 73–87. 54 indexed citations
15.
Terfelt, Fredrik, Per Ahlberg, Mats E. Eriksson, & Euan N. K. Clarkson. (2005). Furongian (upper Cambrian) biostratigraphy and trilobites of the Håslöv-1 drill core, Scania, S. Sweden. GFF. 127(3). 195–203. 21 indexed citations
16.
Ahlberg, Per, et al.. (2004). Agnostoids and intercontinental tie points in the middle and upper Cambrian of Scandinavia. Lund University Publications (Lund University). 126(1). 108–108. 4 indexed citations
17.
Ahlberg, Per, et al.. (2003). The post-persculptus and pre-ascensus graptolite fauna in Scania, south-western Sweden: Ordovician or Silurian?. Lund University Publications (Lund University). 22 indexed citations
18.
Erlström, Mikael, Per Ahlberg, & Anita Löfgren. (2001). Lower Palaeozoic stratigraphy at Lyby and Tängelsås, central Scania, southern Sweden. GFF. 123(1). 7–14. 10 indexed citations
19.
Ahlberg, Per. (1989). The type species of the Ordovician agnostid trilobiteGeragnostus Howell, 1935. Paläontologische Zeitschrift. 63(3-4). 309–317. 6 indexed citations
20.
Ahlberg, Per & Jan Bergström. (1983). Lower Cambrian trilobites from southern Swedish Lapland. Geologiska Föreningen i Stockholm Förhandlingar. 104(3). 241–246. 17 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Małgorzata Moczydłowska Breakdown of academic impact, for papers by Jackie A. Lees Breakdown of academic impact, for papers by Jörg Maletz Breakdown of academic impact, for papers by Jiayong Wei Breakdown of academic impact, for papers by Markus Aretz Breakdown of academic impact, for papers by Mikhail Rogov Breakdown of academic impact, for papers by Mats E. Eriksson Breakdown of academic impact, for papers by Weihong He Breakdown of academic impact, for papers by Martin A. Pearce Breakdown of academic impact, for papers by Petr Štorch
Rankless by CCL
2026