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

Thresholds of Temperature and Time for Mars Sample Return: Final Report of the Mars Sample Return Temperature-Time Tiger Team

Sephton, M. A., Freeman, K., Hays, L., Thiessen, F., Benison, K., Carrier, B., Dworkin, J. P., Glamoclija, M., Gough, R., Onofri, S., Peterson, R., Quinn, R., Russell, S., Stüeken, E. E., Velbel, M. & Zolotov, M., May 17 2024, In: Astrobiology. 24, 5, p. 443-488 46 p.

Research output: Contribution to journalArticlepeer-review

Position-Specific 2H/H Equilibrium Isotopic Fractionation Factors in Alkane, Alkene, and Aromatic Molecules: A Density Functional Theory Approach

Watts, H. D., Kubicki, J. D., Pedentchouk, N. & Freeman, K. H., Jan 18 2024, In: ACS Earth and Space Chemistry. 8, 1, p. 21-35 15 p.

Research output: Contribution to journalArticlepeer-review

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 journalArticlepeer-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 journalArticlepeer-review

Introduction

Freeman, K. H. & Jeanloz, R., May 31 2023, In: Annual Review of Earth and Planetary Sciences. 51, p. V-VIII

Research output: Contribution to journalEditorialpeer-review

Impact of organic carbon reworking upon GDGT temperature proxies during the Paleocene-Eocene Thermal Maximum

Inglis, G. N., Martínez-Sosa, P., Tierney, J. E., Witkowski, C. R., Lyons, S., Baczynski, A. A. & Freeman, K. H., Sep 2023, In: Organic Geochemistry. 183, 104644.

Research output: Contribution to journalArticlepeer-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 journalArticlepeer-review

Storage, Transport, and Fate of Perfluoroalkyl Acids (PFAAs) in a Wastewater Reuse and Groundwater Recharge System

Jahn, K. L., Saffer, D. M., Freeman, K. H. & Lincoln, S. A., Sep 2023, In: Water Resources Research. 59, 9, e2022WR034321.

Research output: Contribution to journalArticlepeer-review

Compound-specific carbon isotope measurements of individual lipid biomarkers from immature Ediacaran rocks of Baltica

Pehr, K., Baczynski, A. A., Bekker, A., Hoffmann, A., Freeman, K. H., Poulton, S. W. & Love, G. D., Aug 2023, In: Organic Geochemistry. 182, 104641.

Research output: Contribution to journalArticlepeer-review

Analysis of intramolecular carbon isotope distributions in alanine by electrospray ionization Orbitrap mass spectrometry

Weiss, G. M., Sessions, A. L., Julien, M., Csernica, T., Yamada, K., Gilbert, A., Freeman, K. H. & Eiler, J. M., Nov 2023, In: International Journal of Mass Spectrometry. 493, 117128.

Research output: Contribution to journalArticlepeer-review

Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium

Zeichner, S. S., Aponte, J. C., Bhattacharjee, S., Dong, G., Hofmann, A. E., Dworkin, J. P., Glavin, D. P., Elsila, J. E., Graham, H. V., Naraoka, H., Takano, Y., Tachibana, S., Karp, A. T., Grice, K., Holman, A. I., Freeman, K. H., Yurimoto, H., Nakamura, T., Noguchi, T. & Okazaki, R. & 57 others, Yabuta, H., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Watanabe, S. I., Tsuda, Y., Hamase, K., Fukushima, K., Aoki, D., Hashiguchi, M., Mita, H., Chikaraishi, Y., Ohkouchi, N., Ogawa, N. O., Sakai, S., Parker, E. T., McLain, H. L., Orthous-Daunay, F. R., Vuitton, V., Wolters, C., Schmitt-Kopplin, P., Hertkorn, N., Thissen, R., Ruf, A., Isa, J., Oba, Y., Koga, T., Yoshimura, T., Araoka, D., Sugahara, H., Furusho, A., Furukawa, Y., Aoki, J., Kano, K., Nomura, S. I. M., Sasaki, K., Sato, H., Yoshikawa, T., Tanaka, S., Morita, M., Onose, M., Kabashima, F., Fujishima, K., Yamazaki, T., Kimura, Y. & Eiler, J. M., Dec 1 2023, In: Science. 382, 6677, p. 1411-1416 6 p.

Research output: Contribution to journalArticlepeer-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 journalArticlepeer-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 journalArticlepeer-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 journalArticlepeer-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 journalEditorialpeer-review