2026 John Southon: Earth Science Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Earth Science	98	144	123	71	59	439	61571

Research.com Recognitions

2026 - Research.com Earth Science in United States Leader Award
2025 - Research.com Earth Science in United States Leader Award

Overview

John Southon is affiliated with the University of California, Irvine in the United States. Their research spans multiple fields and topics primarily within Earth and Planetary Sciences and Environmental Science.

The main fields of study for John Southon include:

Earth and Planetary Sciences
Environmental Science

Within these broader areas, their work also touches on several specialized subfields:

Atmospheric Science
Ecology
Paleontology
Anthropology
Genetics

The primary research topics John Southon focuses on comprise:

Geology and Paleoclimatology Research
Archaeology and ancient environmental studies
Pleistocene-Era Hominins and Archaeology
Isotope Analysis in Ecology
Wildlife Ecology and Conservation
Methane Hydrates and Related Phenomena
Genetic diversity and population structure

John Southon's publications appear frequently in several scientific journals and conference programs, including:

Radiocarbon
Abstracts with programs - Geological Society of America
Science Advances
Quaternary Science Reviews
Science

Some notable recent papers featuring John Southon's contributions are:

The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (2020), published in Radiocarbon
SHCal20 Southern Hemisphere Calibration, 0-55,000 Years cal BP (2020), published in Radiocarbon
The origins and spread of domestic horses from the Western Eurasian steppes (2021), published in Nature
Estimating US fossil fuel CO ₂ emissions from measurements of ¹⁴ C in atmospheric CO ₂ (2020), published in Proceedings of the National Academy of Sciences
Female hunters of the early Americas (2020), published in Science Advances

The scientist collaborates frequently with a consistent group of coauthors, which include:

Emily Lindsey
Beth Shapiro
Stéphanie Schiavinato
Loreleï Chauvey
Andaine Seguin-Orlando

Best Publications

IntCal13 and Marine13 radiocarbon age calibration curves 0-50,000 years cal BP

Paula J Reimer;Edouard Bard;Alex Bayliss;J Warren Beck

12384
Citations
The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0-55 cal kBP)

Paula J Reimer;William E N Austin;Edouard Bard;Alex Bayliss

6818
Citations
IntCal04 terrestrial radiocarbon age calibration, 0-26 cal kyr BP

Paula J. Reimer;Mike G.L. Baillie;Edouard Bard;Alex Bayliss

4923
Citations
IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0–50,000 Years cal BP

Unknown

2965
Citations
Absolute calibration of 10Be AMS standards

Kunihiko Nishiizumi;Mineo Imamura;Marc W. Caffee;John R. Southon

1737
Citations
Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurentide lakes

Donald C. Barber;Arthur S. Dyke;Claude Hillaire-Marcel;Anne E. Jennings

1502
Citations
Marine04 marine radiocarbon age calibration, 0-26 cal kyr BP

Konrad A Hughen;Mike G L Baillie;Edouard Bard;J Warren Beck

1359
Citations
SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP

Alan G. Hogg;Alan G. Hogg;Timothy J. Heaton;Quan Hua;Jonathan G. Palmer

1278
Citations
Marine Reservoir Corrections for the Indian Ocean and Southeast Asia

John Southon;Michaele Kashgarian;Michel Fontugne;Bernard Metivier

832
Citations
Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea‐ice/ocean feedbacks

Gifford H. Miller;Gifford H. Miller;Áslaug Geirsdóttir;Yafang Zhong;Darren J. Larsen;Darren J. Larsen

774
Citations
14C activity and global carbon cycle changes over the past 50,000 years.

K. Hughen;S. Lehman;J. Southon;J. Overpeck

582
Citations
Volcanism and deformation since 12,000 years at the Campi Flegrei caldera (Italy)

M.A Di Vito;R Isaia;G Orsi;J Southon

560
Citations
Forest-killing diffuse CO2 emission at Mammoth Mountain as a sign of magmatic unrest

C.D. Farrar;M.L. Sorey;William C. Evans;J.F. Howle

474
Citations
Synchronous radiocarbon and climate shifts during the last deglaciation.

Konrad A. Hughen;John R. Southon;Scott J. Lehman;Jonathan T. Overpeck

469
Citations
Deglacial changes in ocean circulation from an extended radiocarbon calibration

Konrad A. Hughen;Konrad A. Hughen;Jonathan T. Overpeck;Jonathan T. Overpeck;Scott J. Lehman;Michaele Kashgarian

437
Citations
The origins and spread of domestic horses from the Western Eurasian steppes.

Pablo Librado;Naveed Khan;Naveed Khan;Antoine Fages;Mariya A. Kusliy

381
Citations
Carbon-14 in methane sources and in atmospheric methane: the contribution from fossil carbon.

M. Wahlen;N. Tanaka;R. Henry;B. Deck

344
Citations
Marine-derived 14C calibration and activity record for the past 50,000 years updated from the Cariaco Basin

Konrad A. Hughen;John R. Southon;Scott J. Lehman;Chanda J. H. Bertrand

328
Citations
Radiocarbon Variability in the Western North Atlantic During the Last Deglaciation

Laura F. Robinson;Jess F. Adkins;Lloyd D. Keigwin;John Southon

326
Citations
Reservoir Ages in Eastern Pacific Coastal and Estuarine Waters

B. Lynn Ingram;John R. Southon

313
Citations
Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility

G.M. Santos;J.R. Southon;S. Griffin;S.R. Beaupre

292
Citations
Marine04 Marine radiocarbon age calibration, 26 ? 0 ka BP

K Hughen;M Baille;E Bard;J Beck

250
Citations

Frequent Co-Authors

Scott J. Lehman Institute of Arctic and Alpine Research

John B. Miller National Oceanic and Atmospheric Administration

Guaciara M. Santos University of California, Irvine

Alan G. Hogg University of Waikato

Konrad A Hughen Woods Hole Oceanographic Institution

Hendrik N. Poinar McMaster University

Ross D. E. MacPhee American Museum of Natural History

Hai Cheng Xi'an Jiaotong University

Grant D. Zazula Simon Fraser University

Bernd Kromer Heidelberg University

External Links

Personal website of John Southon

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