Katherine H. Freeman

19.3k total citations · 6 hit papers
182 papers, 14.3k citations indexed

About

Katherine H. Freeman is a scholar working on Atmospheric Science, Ecology and Mechanics of Materials. According to data from OpenAlex, Katherine H. Freeman has authored 182 papers receiving a total of 14.3k indexed citations (citations by other indexed papers that have themselves been cited), including 84 papers in Atmospheric Science, 70 papers in Ecology and 46 papers in Mechanics of Materials. Recurrent topics in Katherine H. Freeman's work include Geology and Paleoclimatology Research (79 papers), Isotope Analysis in Ecology (58 papers) and Hydrocarbon exploration and reservoir analysis (46 papers). Katherine H. Freeman is often cited by papers focused on Geology and Paleoclimatology Research (79 papers), Isotope Analysis in Ecology (58 papers) and Hydrocarbon exploration and reservoir analysis (46 papers). Katherine H. Freeman collaborates with scholars based in United States, United Kingdom and Germany. Katherine H. Freeman's co-authors include John M. Hayes, Scott L. Wing, Mark Pagani, Francesca A. Smith, Aaron F. Diefendorf, Stuart G. Wakeham, Richard D. Pancost, P. J. Polissar, Kevin E. Mueller and J. L. Eigenbrode and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Katherine H. Freeman

178 papers receiving 13.9k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

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

2012 779 citations Katherine H. Freeman, Francesca A. McInerney et al. profile →
Global patterns in leaf ¹³ C discrimination and implications for studies of past and future climate

2010 699 citations Aaron F. Diefendorf, Katherine H. Freeman et al. Proceedings of the National Academy of Sciences profile →
Compound-specific isotopic analyses: A novel tool for reconstruction of ancient biogeochemical processes

1990 659 citations Katherine H. Freeman et al. Organic Geochemistry profile →
Marked Decline in Atmospheric Carbon Dioxide Concentrations During the Paleogene

2005 652 citations James C. Zachos, Katherine H. Freeman et al. profile →
Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO₂ levels

1992 524 citations Katherine H. Freeman et al. profile →
Evidence from carbon isotope measurements for diverse origins of sedimentary hydrocarbons

1990 468 citations Katherine H. Freeman et al. profile →

Peers

Countries citing papers authored by Katherine H. Freeman

Since Specialization

Citations

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

Fields of papers citing papers by Katherine H. Freeman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Katherine H. Freeman. 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 Katherine H. Freeman. The network helps show where Katherine H. Freeman may publish in the future.

Co-authorship network of co-authors of Katherine H. Freeman

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Spatial and Temporal Patterns in Petrogenic Organic Carbon Mobilization During the Paleocene‐Eocene Thermal Maximum 2024 ·Paleoceanography and Paleoclimatology ·(unknown), Felix J. Elling, Marcus P. S. Badger, Richard D. Pancost, Alexander J. Dickson, (unknown), (unknown), Ann Pearson, Appy Sluijs, Katherine H. Freeman, Allison A. Baczynski, Gavin L. Foster, Jessica H. Whiteside, Gordon N. Inglis	6
2	Impact of organic carbon reworking upon GDGT temperature proxies during the Paleocene-Eocene Thermal Maximum 2023 ·Organic Geochemistry ·Gordon N. Inglis, (unknown), Jessica E. Tierney, Caitlyn Witkowski, Shelby Lyons, Allison A. Baczynski, Katherine H. Freeman	6
3	Hydrologic Changes Drove the Late Miocene Expansion of C₄ Grasslands on the Northern Indian Subcontinent 2021 ·Paleoceanography and Paleoclimatology ·P. J. Polissar, Kevin T. Uno, Samuel R. Phelps, Allison T. Karp, Katherine H. Freeman, (unknown)	16
4	Late Miocene C₄ Grassland Fire Feedbacks on the Indian Subcontinent 2021 ·Paleoceanography and Paleoclimatology ·Allison T. Karp, Kevin T. Uno, P. J. Polissar, Katherine H. Freeman	15
5	Fire distinguishers: Refined interpretations of polycyclic aromatic hydrocarbons for paleo-applications 2020 ·Geochimica et Cosmochimica Acta ·Allison T. Karp, Alex I. Holman, (unknown), Kliti Grice, Katherine H. Freeman	78
6	Organic matter from the Chicxulub crater exacerbated the K–Pg impact winter 2020 ·Proceedings of the National Academy of Sciences ·Shelby Lyons, Allison T. Karp, Timothy J. Bralower, Kliti Grice, Bettina Schaefer, S. P. S. Gulick, J. Morgan, Katherine H. Freeman	46
7	Microbial biomarkers reveal a hydrothermally active landscape at Olduvai Gorge at the dawn of the Acheulean, 1.7 Ma 2020 ·Proceedings of the National Academy of Sciences ·Ainara Sistiaga, (unknown), David Uribelarrea, David Martín‐Perea, (unknown), Katherine H. Freeman, Fernando Diéz Martín, Enrique Baquedano, Audax Mabulla, Manuel Domínguez‐Rodrigo, Roger E. Summons	15
8	Soil Carbon Loss and Weak Fire Feedbacks During Pliocene C₄ Grassland Expansion in Australia 2020 ·Geophysical Research Letters ·Allison T. Karp, (unknown), Francesca A. McInerney, P. J. Polissar, Katherine H. Freeman	9
9	Grassland fire ecology has roots in the late Miocene 2018 ·Proceedings of the National Academy of Sciences ·Allison T. Karp, Anna K. Behrensmeyer, Katherine H. Freeman	63
10	Evidence for Shelf Acidification During the Onset of the Paleocene‐Eocene Thermal Maximum 2018 ·Paleoceanography and Paleoclimatology ·Timothy J. Bralower, Lee R. Kump, Jean M. Self‐Trail, Marci M. Robinson, Shelby Lyons, Tali L. Babila, (unknown), Katherine H. Freeman, Elizabeth Hajek, William Rush, James C. Zachos	35
11	The influence of pressure on crude oil biodegradation in shallow and deep Gulf of Mexico sediments 2018 ·PLoS ONE ·(unknown), Sara A. Lincoln, (unknown), (unknown), Jennifer L. Macalady, Rudolf Müller, Katherine H. Freeman	40
12	Fossil Leaves and Fossil Leaf n-Alkanes: Reconstructing the First Closed Canopied Rainforests 2013 ·AGU Fall Meeting Abstracts ·Heather V. Graham, Katherine H. Freeman	1
13	CARBON ADDITION DURING THE PALEOCENE-EOCENE THERMAL MAXIMUM: MODEL INVERSION OF A NEW, HIGH-RESOLUTION CARBON ISOTOPE RECORD FROM SVALBARD 2010 ·AGUFM ·Ying Cui, Lee R. Kump, Andy Ridgwell, Christopher K. Junium, Aaron F. Diefendorf, Katherine H. Freeman, Nathan M. Urban	2
14	Long-Lived, Sub-Surface Layers of Toxic Oil in the Deep-Sea: A Molecular Organic and Isotopic Geochemical Approach to Understanding their Nature, Molecular Distribution, Origin and Impact to the Northern Gulf of Mexico 2010 ·AGUFM ·D. J. Hollander, Katherine H. Freeman, Geoffrey S. Ellis, Aaron F. Diefendorf, Ernst B. Peebles, John H. Paul	4
15	Methyl Sulfide Production by a Novel Carbon Monoxide Metabolism in Methanosarcina acetivorans 2006 ·AGUFM ·James Moran, Christopher H. House, (unknown), Katherine H. Freeman	1
16	Hydrogen Isotope Ratios of Leaf Waxes in C3 and C4 Grasses Record Meteoric Water and Aridity Signatures 2004 ·AGU Fall Meeting Abstracts ·Francesca A. Smith, Katherine H. Freeman, James R. Ehleringer, Brent R. Helliker	1
17	Biomarkers Indigenous to Late Archean Rocks 2003 ·AGUFM ·J. L. Eigenbrode, Katherine H. Freeman, R. E. Summons, (unknown), Colin E. Snape	1
18	Dramatic shifts in biomarker carbon isotopic compositions during the Late Ordovician: Evidence for lower than expected pCO2? 2003 ·EAEJA ·Richard D. Pancost, Katherine H. Freeman, Mark E. Patzkowsky, Leho Ainsaar, Tõnu Martma	1
19	Acid base properties, structons and the thermodynamic properties of silicate melts 2003 ·Oxford University Research Archive (ORA) (University of Oxford) ·Donald G. Fraser, Katherine H. Freeman	4
20	Late Archean Biomarkers of Carbonate and Shale Lithologies from the Hamersley Basin, Pilbara Craton, Western Australia 2001 ·J. L. Eigenbrode, Katherine H. Freeman, Jochen J. Brocks, R. E. Summons, Graham A. Logan	1

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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