| Marked decline in atmospheric carbon dioxide concentrations during the Paleogene M Pagani, JC Zachos, KH Freeman, B Tipple, S Bohaty Science 309 (5734), 600-603, 2005 | 1097 | 2005 |
| Compound-specific isotopic analyses: a novel tool for reconstruction of ancient biogeochemical processes JM Hayes, KH Freeman, BN Popp, CH Hoham Organic geochemistry 16 (4-6), 1115-1128, 1990 | 1027 | 1990 |
| Molecular paleohydrology: interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms D Sachse, I Billault, GJ Bowen, Y Chikaraishi, TE Dawson, SJ Feakins, ... Annual Review of Earth and Planetary Sciences 40 (1), 221-249, 2012 | 990 | 2012 |
| Global patterns in leaf 13C discrimination and implications for studies of past and future climate AF Diefendorf, KE Mueller, SL Wing, PL Koch, KH Freeman Proceedings of the National Academy of Sciences 107 (13), 5738-5743, 2010 | 909 | 2010 |
| Fractionation of carbon isotopes by phytoplankton and estimates of ancient CO2 levels KH Freeman, JM Hayes Global biogeochemical cycles 6 (2), 185-198, 1992 | 814 | 1992 |
| Evidence from carbon isotope measurements for diverse origins of sedimentary hydrocarbons KH Freeman, JM Hayes, JM Trendel, P Albrecht Nature 343 (6255), 254-256, 1990 | 745 | 1990 |
| Transient floral change and rapid global warming at the Paleocene-Eocene boundary SL Wing, GJ Harrington, FA Smith, JI Bloch, DM Boyer, KH Freeman Science 310 (5750), 993-996, 2005 | 688 | 2005 |
| Late Miocene atmospheric CO2 concentrations and the expansion of C4 grasses M Pagani, KH Freeman, MA Arthur Science 285 (5429), 876-879, 1999 | 593 | 1999 |
| Miocene evolution of atmospheric carbon dioxide M Pagani, MA Arthur, KH Freeman Paleoceanography 14 (3), 273-292, 1999 | 587 | 1999 |
| Consistent fractionation of 13C in nature and in the laboratory: Growth‐rate effects in some haptophyte algae RR Bidigare, A Fluegge, KH Freeman, KL Hanson, JM Hayes, ... Global Biogeochemical Cycles 11 (2), 279-292, 1997 | 517 | 1997 |
| Climate change as the dominant control on glacial-interglacial variations in C3 and C4 plant abundance Y Huang, FA Street-Perrott, SE Metcalfe, M Brenner, M Moreland, ... Science 293 (5535), 1647-1651, 2001 | 487 | 2001 |
| New insights into Archean sulfur cycle from mass-independent sulfur isotope records from the Hamersley Basin, Australia S Ono, JL Eigenbrode, AA Pavlov, P Kharecha, D Rumble III, JF Kasting, ... Earth and Planetary Science Letters 213 (1-2), 15-30, 2003 | 419 | 2003 |
| Influence of physiology and climate on δD of leaf wax n-alkanes from C3 and C4 grasses FA Smith, KH Freeman Geochimica et Cosmochimica Acta 70 (5), 1172-1187, 2006 | 415 | 2006 |
| Production of n-alkyl lipids in living plants and implications for the geologic past AF Diefendorf, KH Freeman, SL Wing, HV Graham Geochimica et Cosmochimica Acta 75 (23), 7472-7485, 2011 | 362 | 2011 |
| Paleoaltimetry of the Tibetan Plateau from D/H ratios of lipid biomarkers PJ Polissar, KH Freeman, DB Rowley, FA McInerney, BS Currie Earth and Planetary Science Letters 287 (1-2), 64-76, 2009 | 287 | 2009 |
| Slow release of fossil carbon during the Palaeocene–Eocene Thermal Maximum Y Cui, LR Kump, AJ Ridgwell, AJ Charles, CK Junium, AF Diefendorf, ... Nature Geoscience 4 (7), 481-485, 2011 | 273 | 2011 |
| Water column anoxia, enhanced productivity and concomitant changes in δ13C and δ34S across the Frasnian–Famennian boundary (Kowala—Holy Cross Mountains/Poland) MM Joachimski, C Ostertag-Henning, RD Pancost, H Strauss, ... Chemical Geology 175 (1-2), 109-131, 2001 | 272 | 2001 |
| Late Archean rise of aerobic microbial ecosystems JL Eigenbrode, KH Freeman Proceedings of the National Academy of Sciences 103 (43), 15759-15764, 2006 | 265 | 2006 |
| Carbon isotope geochemistry of the Frasnian–Famennian transition MM Joachimski, RD Pancost, KH Freeman, C Ostertag-Henning, ... Palaeogeography, Palaeoclimatology, Palaeoecology 181 (1-3), 91-109, 2002 | 264 | 2002 |
| The character and origin of lacustrine source rocks in the Lower Cretaceous synrift section, Congo Basin, west Africa NB Harris, KH Freeman, RD Pancost, TS White, GD Mitchell AAPG bulletin 88 (8), 1163-1184, 2004 | 253 | 2004 |
