2026 James C. Zachos: 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	104	105	87	53	43	534	55994

Research.com Recognitions

2026 - Research.com Earth Science in United States Leader Award
2025 - Research.com Earth Science in United States Leader Award
2018 - Royal Netherlands Academy of Arts and Sciences
2017 - Member of the National Academy of Sciences
2011 - Fellow of the American Academy of Arts and Sciences
2008 - Fellow of American Geophysical Union (AGU)

Overview

James C. Zachos is affiliated with the University of California, Santa Cruz in the United States. Their research primarily focuses on Earth and Planetary Sciences, with a significant concentration in several related subfields.

The main subfields of study include Atmospheric Science, Ocean Engineering, Oceanography, Paleontology, and Ecology. These areas reflect the scope of their investigation into Earth's climatic and geological history.

The key topics covered in their work are:

Geology and Paleoclimatology Research
Paleontology and Stratigraphy of Fossils
Drilling and Well Engineering
Isotope Analysis in Ecology
Reservoir Engineering and Simulation Methods
Methane Hydrates and Related Phenomena
Marine and Coastal Ecosystems

Zachos has contributed significantly to scientific literature, with recent papers published in prestigious journals. Selected recent works include:

"An astronomically dated record of Earth's climate and its predictability over the last 66 million years," 2020, Science
"On impact and volcanism across the Cretaceous-Paleogene boundary," 2020, Science
"Global warming in the pipeline," 2023, Oxford Open Climate Change
"Toward a Cenozoic history of atmospheric CO ₂," 2023, Science
"Ice retreat in Wilkes Basin of East Antarctica during a warm interglacial," 2020, Nature

Their frequent co-authors include Isabella Raffi, Jan Backman, Paul N. Pearson, Ursula Röhl, and Timothy J. Bralower, with multiple joint publications.

Zachos has published extensively in venues such as Zenodo (CERN European Organization for Nuclear Research), Paleoceanography and Paleoclimatology, Abstracts with programs - Geological Society of America, OPAL (Open@LaTrobe) from La Trobe University, and Science.

Recognition of their scientific contributions is reflected in several awards, including:

Royal Netherlands Academy of Arts and Sciences, 2018
Member of the National Academy of Sciences, 2017
Fellow of the American Academy of Arts and Sciences, 2011
Fellow of American Geophysical Union (AGU), 2008

Best Publications

Trends, Rhythms, and Aberrations in Global Climate 65 Ma to Present

James Zachos;Mark Pagani;Lisa Sloan;Ellen Thomas;Ellen Thomas

12161
Citations
An early Cenozoic perspective on greenhouse warming and carbon-cycle dynamics

James C. Zachos;Gerald R. Dickens;Richard E. Zeebe

3859
Citations
Target atmospheric CO2: Where should humanity aim?

James Hansen;Makiko Sato;Pushker Kharecha;David Beerling

2000
Citations
An astronomically dated record of Earth's climate and its predictability over the last 66 million years.

Thomas Westerhold;Norbert Marwan;Norbert Marwan;Anna Joy Drury;Anna Joy Drury;Diederik Liebrand

1871
Citations
Rapid acidification of the ocean during the Paleocene-Eocene thermal maximum.

James C. Zachos;Ursula Röhl;Stephen A. Schellenberg;Appy Sluijs

1382
Citations
The Geological Record of Ocean Acidification

Bärbel Hönisch;Andy Ridgwell;Daniela N. Schmidt;Ellen Thomas;Ellen Thomas

1239
Citations
Marked Decline in Atmospheric Carbon Dioxide Concentrations During the Paleogene

Mark Pagani;James C. Zachos;James C. Zachos;James C. Zachos;Katherine H. Freeman;Katherine H. Freeman;Katherine H. Freeman;Brett Tipple;Brett Tipple;Brett Tipple

1116
Citations
Assessing "dangerous climate change": required reduction of carbon emissions to protect young people, future generations and nature.

James E. Hansen;Pushker A. Kharecha;Pushker A. Kharecha;Makiko H. Sato;Valerie Masson-Delmotte

981
Citations
Evolution of Early Cenozoic marine temperatures

James C. Zachos;Lowell D. Stott;Kyger C. Lohmann

960
Citations
A Transient Rise in Tropical Sea Surface Temperature During the Paleocene-Eocene Thermal Maximum

James C. Zachos;Michael W. Wara;Steven Bohaty;Margaret L. Delaney

816
Citations
Correlation between isotope records in marine and continental carbon reservoirs near the Palaeocene/Eocene boundary

Paul L. Koch;James C. Zachos;Philip D. Gingerich

815
Citations
Abrupt climate change and transient climates during the Paleogene: a marine perspective.

James C. Zachos;Kyger C. Lohmann;James C. G. Walker;Sherwood W. Wise

687
Citations
Astronomical pacing of late Palaeocene to early Eocene global warming events

Lucas J. Lourens;Appy Sluijs;Dick Kroon;James C. Zachos

677
Citations
Climate response to orbital forcing across the Oligocene-Miocene boundary.

James C. Zachos;Nicholas J. Shackleton;Justin S. Revenaugh;Heiko Pälike

631
Citations
High‐resolution (104 years) deep‐sea foraminiferal stable isotope records of the Eocene‐Oligocene climate transition

James C. Zachos;Terrence M. Quinn;Karen A. Salamy

557
Citations
On the duration of the Paleocene-Eocene thermal maximum (PETM)

Ursula Röhl;Thomas Westerhold;Timothy J. Bralower;James C. Zachos

532
Citations
Carbon dioxide forcing alone insufficient to explain Palaeocene–Eocene Thermal Maximum warming

Richard E. Zeebe;James C. Zachos;Gerald R. Dickens

510
Citations
Significant Southern Ocean warming event in the late middle Eocene

Steven M. Bohaty;James C. Zachos

505
Citations
Extreme warming of mid-latitude coastal ocean during the Paleocene-Eocene Thermal Maximum: Inferences from TEX86 and isotope data

J.C. Zachos;S. Schouten;S. Bohaty;T. Quattlebaum

468
Citations
Early Cenozoic decoupling of the global carbon and sulfur cycles

A. C. Kurtz;L. R. Kump;M. A. Arthur;J. C. Zachos

455
Citations
The geological record of ocean acidification

B. Hoenisch;A. J. Ridgwell;E. Thomas;J. C. Zachos

0
Citations

Frequent Co-Authors

Thomas Westerhold University of Bremen

Ellen Thomas Yale University

Isabella Raffi University of Chieti-Pescara

Steven M Bohaty University of Southampton

Appy Sluijs Utrecht University

Roy H Wilkens University of Hawaiʻi Sea Grant

Lucas Joost Lourens Utrecht University

Richard E. Zeebe University of Hawaii at Manoa

Timothy J. Bralower Pennsylvania State University

Dick Kroon University of Edinburgh

External Links

Wikipedia of James C. Zachos Personal website of James C. Zachos

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