Karp, A.T.,  Koerner, S.E.,  Hempson, G.P.,  Abraham, J.O.,  Anderson, T.M.,  Bond, W.J. et al. (2024) Grazing herbivores reduce herbaceous biomass and fire activity across African savannas. Ecology Letters,  27, e14450. Available at: http://doi.org/10.1111/ele.14450

Del Toro, I., Case, M. F., Karp, A. T., Slingsby, J. A., Staver. A. C., (2024) Carbon isotope trends across a century of herbarium specimens suggest CO2 fertilization of C4 grasses. ​New Phytologist.​ Available at: doi.org/10.1111/nph.19868

​Zeichner. S., Aponte,  J.C. Bhattacharjee, S.,…….Karp, A.T.,……et al. (2023) Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium. Science. 322, 6677. Available at: https://www.science.org/doi/10.1126/science.adg6304
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Karp, A.T., Uno, K.T., Berke, M.A., Russell, J.M., Scholz, C.A., Marlon, J.R., Faith, J.T., Staver, A.C., (2023) Nonlinear rainfall effects on savanna fire activity across the African Humid Period. Quat. Sci. Rev. 304, 107994. Available at: https://doi.org/10.1016/j.quascirev.2023.107994
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Vachula, R.S., Karp, A.T., Denis, E.H., Balascio, N.L., Canuel, E.A., Huang, Y., (2022) Spatially calibrating polycyclic aromatic hydrocarbons (PAHs) as proxies of area burned by vegetation fires: Insights from comparisons of historical data and sedimentary PAH fluxes. Palaeogeography. Palaeoclimatology. Palaeoecology, 596, 110995. Available at: https://doi.org/10.1016/j.palaeo.2022.110995
 
Karp A.T., Faith J.T., Marlon, J.R., Staver, A.C., (2021) Global response of fire activity to late Quaternary grazer extinctions. Science. 374, 1145-1148. Available at: https://www.science.org/doi/10.1126/science.abj1580

Staver A.C., Abraham J.O., Hempson G.P, Karp A.T., Faith J. T. (2021) The past, present, and future of herbivore impacts on savanna vegetation. Journal of Ecology. Available at: https://doi.org/10.1111/1365-2745.13685

Karp, A. T.,  Uno, K. T.,  Polissar, P. J., &  Freeman, K. H. (2021).  Late Miocene C4 grassland fire feedbacks on the Indian Subcontinent. Paleoceanography and Paleoclimatology,  36, e2020PA004106. Available at: https://doi.org/10.1029/2020PA004106

Polissar, P. J.,  Uno, K. T.,  Phelps, S. R.,  Karp, A. T.,  Freeman, K. H., &  Pensky, J. L. (2021).  Hydrologic Changes Drove the Late Miocene Expansion of C4 Grasslands on the Northern Indian Subcontinent. Paleoceanography and Paleoclimatology,  36, e2020PA004108. Available at: https://doi.org/10.1029/2020PA004108

Karp, A. T.,  Andrae, J. W.,  McInerney, F. A.,  Polissar, P. J., &  Freeman, K. H. (2021).  Soil carbon loss and weak fire feedbacks during Pliocene C4 grassland expansion in Australia. Geophysical Research Letters, 48, e2020GL090964. Available at: https://doi.org/10.1029/2020GL090964

Lyons, S.L., Karp A.T., Bralower T., Grice K., Schaeffer B., Gulick S., Morgan J., Freeman K. H. (2020) Organic Matter from the Chicxulub Crater Exacerbated the K-Pg Impact Winter PNAS Available at: https://doi.org/10.1073/pnas.2004596117

Karp A. T., Holman A. I., Hopper P., Grice K. and Freeman K. H. (2020) Fire Distinguishers: Refined interpretations of paleofire from polycyclic aromatic hydrocarbons. Geochim. Cosmochim. Acta 289, 93–113. Available at: https://doi.org/10.1016/j.gca.2020.08.024.

Karp A. T., Behrensmeyer A. K. and Freeman K. H. (2018) Grassland fire ecology has roots in the late Miocene. PNAS 115, 12130–12135. Available at: https://doi.org/10.1073/pnas.1809758115