Katherine Freeman

Affiliate Researcher
Titles and Affiliations
Evan Pugh University Professor of Geosciences, Geosciences

Research Summary

Carbon, water and climate; biomarkers of ancient landscapes; fire markers; habitats of early humans; microbial biogeochemistry and biosignatures; oil, microbes and sediments in the Gulf of Mexico; and Pico-CSIA and early life of Earth.

In the News

Research Keywords

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Projects

Recent Publications

Sequential measurement of 13C, 15N, and 34S isotopic composition on nanomolar quantities of carbon, nitrogen, and sulfur using nano-elemental analysis/isotope ratio mass spectrometry

Baczynski, A. A., Brodie, C. R., Kracht, O. & Freeman, K. H., Mar 15 2023, In: Rapid Communications in Mass Spectrometry. 37, 5, e9444.

Research output: Contribution to journal › Article › peer-review

Early Cretaceous marine incursions into South Atlantic rift basins originated from the south

Cui, X., Wignall, B., Freeman, K. H. & Summons, R. E., Dec 2023, In: Communications Earth and Environment. 4, 1, 6.

Research output: Contribution to journal › Article › peer-review

Preferential Retention and Transport of Perfluorooctanesulfonic Acid in a Dolomite Aquifer

Jahn, K. L., Lincoln, S. A., Freeman, K. H. & Saffer, D. M., May 1 2023, In: Groundwater. 61, 3, p. 318-329 12 p.

Research output: Contribution to journal › Article › peer-review

Local differences in paleohydrology have stronger influence on plant biomarkers than regional climate change across two Paleogene Laramide Basins, Wyoming, USA

Azevedo-Schmidt, L., Diefendorf, A. F., Schlanser, K., Baczynski, A. A., Dechesne, M., Dunn, R., Freeman, K. H. & Currano, E. D., Jun 15 2022, In: Palaeogeography, Palaeoclimatology, Palaeoecology. 596, 110977.

Research output: Contribution to journal › Article › peer-review

Alkenones in Pleistocene Upper Bed I (1.803–1.900 Ma) sediments from Paleolake Olduvai, Tanzania

Brassell, S. C., Colcord, D. E., Shilling, A. M., Stanistreet, I. G., Stollhofen, H., Toth, N., Schick, K. D., Njau, J. K. & Freeman, K. H., Aug 2022, In: Organic Geochemistry. 170, 104437.

Research output: Contribution to journal › Article › peer-review

Recommendation on Orbiting Sample Cleanliness

Cockell, C. S., Chitale, R., Clement, B., Davila, A., Freeman, K. H., French, K. L., Glavin, D. P., Hays, L. E., Hummel, K., Meyer, M. A., Pratt, L. M., Salvo, C., Seasly, E. & Tsang, K. W., Jun 1 2022, In: Astrobiology. 22, S1, p. S238-S241

Research output: Contribution to journal › Article › peer-review

Introduction

Freeman, K. H. & Jeanloz, R., May 31 2022, In: Annual Review of Earth and Planetary Sciences. 50, p. V-VII

Research output: Contribution to journal › Editorial › peer-review

Synchronous Marine and Terrestrial Carbon Cycle Perturbation in the High Arctic During the PETM

Cui, Y., Diefendorf, A. F., Kump, L. R., Jiang, S. & Freeman, K. H., Apr 2021, In: Paleoceanography and Paleoclimatology. 36, 4, e2020PA003942.

Research output: Contribution to journal › Article › peer-review

Decreased soil carbon in a warming world: Degraded pyrogenic carbon during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming

Denis, E. H., Maibauer, B. J., Bowen, G. J., Jardine, P. E., Harrington, G. J., Baczynski, A. A., McInerney, F. A., Collinson, M. E., Belcher, C. M., Wing, S. L. & Freeman, K. H., Jul 15 2021, In: Earth and Planetary Science Letters. 566, 116970.

Research output: Contribution to journal › Article › peer-review

Soil carbon degradation during the Paleocene-Eocene Thermal Maximum in the Piceance Basin, USA

Denis, E. H., Foreman, B. Z. & Freeman, K. H., Feb 15 2021, In: Palaeogeography, Palaeoclimatology, Palaeoecology. 564, 110182.

Research output: Contribution to journal › Article › peer-review

Biased preservation of Pleistocene climate variability proxies at Olduvai Gorge, Tanzania

Ferland, T. M., Colcord, D. E., Shilling, A. M., Brassell, S. C., Stanistreet, I. G., Stollhofen, H., Njau, J. K., Schick, K. D., Toth, N. & Freeman, K. H., Jan 15 2021, In: Palaeogeography, Palaeoclimatology, Palaeoecology. 562, 109940.

Research output: Contribution to journal › Article › peer-review

Position-specific isotope fractionation in amino acids sorbed to ice: Implications for the preservation of isotopologue biosignatures

Fox, A. C., Martineau, E., Remaud, G. S. & Freeman, K. H., Sep 15 2021, In: Geochimica et Cosmochimica Acta. 309, p. 45-56 12 p.

Research output: Contribution to journal › Article › peer-review

Mission statement

Freeman, K. H. & Jeanloz, R., May 30 2021, In: Annual Review of Earth and Planetary Sciences. 49, p. v-viii

Research output: Contribution to journal › Editorial › peer-review

Late Miocene C4 Grassland Fire Feedbacks on the Indian Subcontinent

Karp, A. T., Uno, K. T., Polissar, P. J. & Freeman, K. H., Apr 2021, In: Paleoceanography and Paleoclimatology. 36, 4, e2020PA004106.

Research output: Contribution to journal › Article › peer-review

Soil Carbon Loss and Weak Fire Feedbacks During Pliocene C4 Grassland Expansion in Australia

Karp, A. T., Andrae, J. W., McInerney, F. A., Polissar, P. J. & Freeman, K. H., Jan 28 2021, In: Geophysical Research Letters. 48, 2, e2020GL090964.

Research output: Contribution to journal › Letter › peer-review