John Lignum

409 total citations
5 papers, 333 citations indexed

About

John Lignum is a scholar working on Paleontology, Geophysics and Atmospheric Science. According to data from OpenAlex, John Lignum has authored 5 papers receiving a total of 333 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Paleontology, 3 papers in Geophysics and 2 papers in Atmospheric Science. Recurrent topics in John Lignum's work include Paleontology and Stratigraphy of Fossils (5 papers), Geological formations and processes (2 papers) and Geological and Geochemical Analysis (2 papers). John Lignum is often cited by papers focused on Paleontology and Stratigraphy of Fossils (5 papers), Geological formations and processes (2 papers) and Geological and Geochemical Analysis (2 papers). John Lignum collaborates with scholars based in United Kingdom, Norway and Australia. John Lignum's co-authors include Ian Jarvis, Martin A. Pearce, Hugh C. Jenkyns, Darren R. Gröcke, Espen M. Knutsen, Eric M. Roberts, Jiří Laurin, Andrew S. Gale, David Selby and Jim Kennedy and has published in prestigious journals such as Gondwana Research, Review of Palaeobotany and Palynology and Journal of Micropalaeontology.

In The Last Decade

John Lignum

5 papers receiving 321 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John Lignum United Kingdom 4 278 172 103 102 60 5 333
Ivan Bour France 6 318 1.1× 154 0.9× 118 1.1× 153 1.5× 90 1.5× 6 382
Heda Agić Sweden 13 371 1.3× 238 1.4× 92 0.9× 123 1.2× 47 0.8× 33 433
Gabriele Gambacorta Italy 13 329 1.2× 181 1.1× 114 1.1× 163 1.6× 102 1.7× 25 411
Paul Dodsworth United Kingdom 11 374 1.3× 229 1.3× 116 1.1× 116 1.1× 98 1.6× 20 444
Magne Høyberget Sweden 11 311 1.1× 142 0.8× 58 0.6× 109 1.1× 74 1.2× 35 392
A. Förster Netherlands 4 399 1.4× 249 1.4× 154 1.5× 149 1.5× 93 1.6× 7 457
Lucyna Leda Germany 9 369 1.3× 161 0.9× 113 1.1× 119 1.2× 60 1.0× 13 384
Letizia Reggiani Italy 5 314 1.1× 158 0.9× 109 1.1× 152 1.5× 48 0.8× 7 344
Richard Morante Australia 5 366 1.3× 144 0.8× 99 1.0× 122 1.2× 72 1.2× 6 402
K. G. Miller United States 6 204 0.7× 165 1.0× 61 0.6× 103 1.0× 59 1.0× 7 292

Countries citing papers authored by John Lignum

Since Specialization
Citations

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

Fields of papers citing papers by John Lignum

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John Lignum

This figure shows the co-authorship network connecting the top 25 collaborators of John Lignum. A scholar is included among the top collaborators of John Lignum 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 John Lignum. John Lignum is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

5 of 5 papers shown
1.
2.
Jarvis, Ian, Darren R. Gröcke, Jiří Laurin, et al.. (2016). Paired carbon stable-isotope records for the Cenomanian Stage (100.5 -93.9 Ma): correlation tool and Late Cretaceous pCO2 record?. EGUGA. 1 indexed citations
3.
Jarvis, Ian, John Lignum, Darren R. Gröcke, Hugh C. Jenkyns, & Martin A. Pearce. (2011). Black shale deposition, atmospheric CO2 drawdown, and cooling during the Cenomanian‐Turonian Oceanic Anoxic Event. Paleoceanography. 26(3). 279 indexed citations
4.
5.
Lignum, John, Ian Jarvis, & Martin A. Pearce. (2007). A critical assessment of standard processing methods for the preparation of palynological samples. Review of Palaeobotany and Palynology. 149(3-4). 133–149. 31 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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