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Earth Science

D-Index
72
Citations
20977
World Ranking
840
National Ranking
399

Research.com Recognitions

  • 2013 - Fellow of American Geophysical Union (AGU)
  • 2013 - Member of the National Academy of Sciences
  • 2010 - Fellow of John Simon Guggenheim Memorial Foundation
  • Fellow of the Geological Society of America
  • Fellow of the Geological Society of America

Overview

Katherine H. Freeman is affiliated with Pennsylvania State University in the United States. Their research spans a range of topics within Earth and Planetary Sciences and Environmental Science, with a focus on both broad and specialized areas.

The primary fields of study include:

  • Earth and Planetary Sciences
  • Environmental Science

More specific subfields investigated by Freeman encompass:

  • Atmospheric Science
  • Ecology
  • Astronomy and Astrophysics
  • Paleontology
  • Environmental Chemistry

Their work covers several main topics, including:

  • Geology and Paleoclimatology Research
  • Isotope Analysis in Ecology
  • Hydrocarbon exploration and reservoir analysis
  • Methane Hydrates and Related Phenomena
  • Astro and Planetary Science
  • Mass Spectrometry Techniques and Applications
  • Paleontology and Stratigraphy of Fossils

Freeman has published extensively, contributing to notable scientific venues. Frequent publication outlets feature:

  • Abstracts with programs - Geological Society of America
  • Annual Review of Earth and Planetary Sciences
  • Paleoceanography and Paleoclimatology
  • Palaeogeography Palaeoclimatology Palaeoecology
  • Geochimica et Cosmochimica Acta

Among recent published papers are:

  • "Fire distinguishers: Refined interpretations of polycyclic aromatic hydrocarbons for paleo-applications" (2020, Geochimica et Cosmochimica Acta)
  • "Organic matter from the Chicxulub crater exacerbated the K-Pg impact winter" (2020, Proceedings of the National Academy of Sciences)
  • "Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu" (2025, Nature Astronomy)
  • "Microbial life in the nascent Chicxulub crater" (2020, Geology)
  • "Origin of a global carbonate layer deposited in the aftermath of the Cretaceous-Paleogene boundary impact" (2020, Earth and Planetary Science Letters)

Freeman has collaborated frequently with several researchers, including:

  • Allison A. Baczynski
  • Allison T. Karp
  • Kliti Grice
  • Raymond Jeanloz
  • Shelby Lyons

The scientist has received recognition in the form of several awards and honors:

  • Member of the National Academy of Sciences (2013)
  • Fellow of American Geophysical Union (AGU) (2013)
  • Fellow of John Simon Guggenheim Memorial Foundation (2010)
  • Fellow of the Geological Society of America

Best Publications

  • 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

  • Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms

    Dirk Sachse;Isabelle Billault;Gabriel J. Bowen;Yoshito Chikaraishi

  • Compound-specific isotopic analyses: a novel tool for reconstruction of ancient biogeochemical processes.

    J.M. Hayes;Katherine H. Freeman;Brian N. Popp;Christopher H. Hoham

  • Global patterns in leaf 13C discrimination and implications for studies of past and future climate

    Aaron F. Diefendorf;Kevin E. Mueller;Scott. L. Wing;Paul L. Koch

  • Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO2 levels

    Katherine Haines Freeman;J. M. Hayes

  • Evidence from carbon isotope measurements for diverse origins of sedimentary hydrocarbons.

    Katherine H. Freeman;J. M. Hayes;Jean Michel Trendel;Pierre Albrecht

  • Transient Floral Change and Rapid Global Warming at the Paleocene-Eocene Boundary

    Scott L. Wing;Guy J. Harrington;Francesca A. Smith;Francesca A. Smith;Jonathan I. Bloch

  • Late Miocene Atmospheric CO2 Concentrations and the Expansion of C4 Grasses

    Mark Pagani;Katherine H. Freeman;Michael A. Arthur

  • Miocene evolution of atmospheric carbon dioxide

    Mark Pagani;Mark Pagani;Michael A. Arthur;Katherine H. Freeman

  • Consistent fractionation of 13C in nature and in the laboratory: growth-rate effects in some haptophyte algae.

    Robert R. Bidigare;Arnim Fluegge;Arnim Fluegge;Katherine H. Freeman;Kristi L. Hanson

  • Climate change as the dominant control on glacial-interglacial variations in C3 and C4 plant abundance

    Y. Huang;F. A. Street-Perrott;S. E. Metcalfe;M. Brenner

  • New insights into Archean sulfur cycle from mass-independent sulfur isotope records from the Hamersley Basin, Australia

    Shuhei Ono;Jennifer L. Eigenbrode;Alexander A. Pavlov;Pushker Kharecha

  • Influence of physiology and climate on δD of leaf wax n-alkanes from C3 and C4 grasses

    Francesca A. Smith;Katherine H. Freeman

  • Production of n-alkyl lipids in living plants and implications for the geologic past

    Aaron F. Diefendorf;Katherine H. Freeman;Scott L. Wing;Heather V. Graham

  • Slow release of fossil carbon during the Palaeocene-Eocene Thermal Maximum

    Ying Cui;Lee R. Kump;Andy J. Ridgwell;Adam J. Charles

  • Paleoaltimetry of the Tibetan Plateau from D/H ratios of lipid biomarkers

    Pratigya J. Polissar;Katherine H. Freeman;David B. Rowley;Francesca A. McInerney

  • Late Archean rise of aerobic microbial ecosystems

    Jennifer L. Eigenbrode;Katherine H. Freeman

  • Molecular and isotopic records of C4 grassland expansion in the late miocene

    K.H. Freeman;L.A. Colarusso

  • Water column anoxia, enhanced productivity and concomitant changes in δ13C and δ34S across the Frasnian–Famennian boundary (Kowala — Holy Cross Mountains/Poland)

    Michael M Joachimski;Christian Ostertag-Henning;Richard D Pancost;Harald Strauss

  • Carbon isotope geochemistry of the Frasnian–Famennian transition

    MM Joachimski;Rich D Pancost;KH Freeman;C Ostertag-Henning

  • Magnitude of the carbon isotope excursion at the Paleocene-Eocene thermal maximum: The role of plant community change

    Francesca A. Smith;Francesca A. Smith;Scott L. Wing;Katherine H. Freeman

  • SUPPLEMENTARY MATERIAL FOR "Molecular paleohydrology: interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms"

    Dirk Sachse;Isabelle Billault;Gabriel J. Bowen;Yoshito Chikaraishi

Frequent Co-Authors

Ian G. Stanistreet
Ian G. Stanistreet University of Liverpool
Richard D. Pancost
Richard D. Pancost University of Bristol
Michael A. Arthur
Michael A. Arthur Pennsylvania State University
Lee R. Kump
Lee R. Kump Pennsylvania State University
Kliti Grice
Kliti Grice Curtin University
Stuart G. Wakeham
Stuart G. Wakeham Skidaway Institute of Oceanography
Timothy J. Bralower
Timothy J. Bralower Pennsylvania State University
Scott L. Wing
Scott L. Wing National Museum of Natural History
Simon C. Brassell
Simon C. Brassell Indiana University

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