& = students / postdocs for whom I serve(d) as the primary advisor
* = includes data from the JHU isotope lab

Published or in Press

*Leichliter JH, Sponheimer M, Avenant NL, Sandberg PA, Paine OCC, Codron D, Codron J, Passey BH (2016) Small mammal insectivore stable carbon isotope compositions as habitat proxies in a South African savanna ecosystem. Journal of Archaeological Science: Reports 8, 335-345.

Garcia N, Feranec RS, Passey BH, Cerling TE, Arsuaga JL (2015) Exploring the potential of laser ablation carbon isotope analysis for examining ecology during the ontogeny of middle Pleistocene hominins from Sima de los Huesos (Northern Spain). PLoS One

*Arppe L, Kaakinen A, Passey BH, Zhang ZQ, Fortelius M (2015) Small mammal tooth enamel carbon isotope record of C4 grasses in late Neogene China.  Global and Planetary Change 133, 288-297.

Cerling TE, Andanje SA, Blumenthal SA, Brown FH, Chritz KL, Harris JM, Hart JA, Kirera FM, Kaleme P, Leakey LN, Leakey MG, Levin NE, Manthi FK, Passey BH, Uno KT (2015) Dietary changes of large herbivores in the Turkana Basin, Kenya from 4 to 1 Ma.  Proceedings of the National Academy of Sciences, USA 112, 11467-11472.

Passey BH (2015) Biogeochemical tales told by isotope clumps.  Science 348, 394-395

*Shenton BJ, Grossman EL, Passey BH, Henkes GA&, Becker TP, Laya JC, Perez-Huerta A, Becker SP, Lawson M (2015) Clumped isotope thermometry in deeply buried sedimentary carbonates: The effects of bond reordering and recrystallization.  GSA Bulletin 127, 1036–1051.

Kaakinen A, Aziz HA, Passey BH, Zhang ZQ, Liu LP, Salminen J, Wang L, Krijgsman W. Fortelius M (2015). Age and stratigraphic context of Pliopithecus and associated fauna from Miocene sedimentary strata at Damiao, Inner Mongolia, China.  Journal of Asian Earth Sciences. 100, 78–90

*Fan M, Hough BG, Passey BH (2014) Middle to late Cenozoic cooling and high topography in the central Rocky Mountains: constraints from clumped isotope geochemistry.  Earth and Planetary Science Letters 408, 35-47.

*Passey BHHu H&, Ji H&, Montanari S, Li S, Henkes GA&, Levin NE (2014) Triple oxygen isotopes in biogenic and sedimentary carbonates.  Geochimica et Cosmochimica Acta 141, 1–25. 050_Passey_etal_2014.pdf

*Suarez MB&, Passey BH (2014) Assessment of the clumped isotope composition of fossil bone carbonate as a recorder of subsurface temperatures.  Geochimica et Cosmochimica Acta 140, 142–159. 049_Suarez_Passey_2014.pdf

*Henkes GA&, Passey BH, Grossman EL, Shenton BJ, Perez-Huerta A, Yancey TE (2014) Temperature limits for preservation of primary calcite clumped isotope paleotemperatures. Geochimica et Cosmochimica Acta. 139, 386-382. 048_Henkes_etal_2014.pdf

Garzione CN, Auerbach DJ, Smith JJ-S, Rosario JJ, Passey BH, Jordan TE, Eiler JM (2014) Clumped isotope evidence for diachronous surface cooling of the Altiplano and pulsed surface uplift of the Central Andes.  Earth and Planetary Science Letters 393, 173-181. 047_Garzione_etal_2014.pdf

*Hough BG, Fan M, Passey BH (2014) Calibration of the clumped isotope geothermometer in soil carbonate in Wyoming and Nebraska: Implications for paleoelevation and paleoclimate reconstruction.  Earth and Planetary Science Letters 391, 120-130.  046_Hough_etal_2014.pdf

Eronen JT, Kaakinen A, Liu LP, Passey BH, Tang H, and Zhang ZQ. (2014) Here be dragons: Mesowear and tooth enamel isotopes of the classic "Hipparion" faunas from Baode, Shanxi Province, China.   Annales Zoologici Fennici 51, 227-244.  045_Eronen_etal_2014.pdf

Wang Y, Xu Y, Khawaja S, Passey BH, Zhang C, Wang X, Li Q, Tseng ZJ, Takeuchi GT, Deng T, Xie G (2013) Diet and environment of a mid-Pliocene fauna from southwestern Himalaya: Paleo-elevation implications.  Earth and Planetary Science Letters 376, 43-53. 044_Wang_etal_2013.pdf

*Price GD, Passey BH (2013) Dynamic polar climates in a greenhouse world: Evidence from clumped isotope thermometry of early Cretaceous belemnites.  Geology 41, 923-926.  043_Price_Passey_2013.pdf

Kaakinen A, Passey BH, Zhang ZQ, Liu LP, Pesonen LJ, Fortelius M (2013) Stratigraphy and paleoecology of the classical dragon bone localities of Baode County, Shaanxi Province. p. 203-217.  In XM Wang, LJ Flynn, M Fortelius, eds., Fossil Mammals of Asia: Neogene Biostratigraphy and Chronology. Columbia University Press, New York, 732 p.

*VanDeVelde JH, Bowen GJ, Passey BH, Bowen BB (2013) Climatic and diagenetic signals in the stable isotope geochemistry of dolomitic paleosols spanning the Paleocene-Eocene boundary. Geochimica et Cosmochimica Acta 109, 254-267.  041_VanDeVelde_etal_2013.pdf

*Henkes GA&, Passey BH, Wanamaker AD, Grossman EL, Ambrose WG, Carroll ML (2013) Carbonate clumped isotope compositions of modern marine mollusk and brachiopod shells.  Geochimica et Cosmochimica Acta 106, 307-325. 040_Henkes_etal_2013.pdf

*Passey BH, Henkes GA& (2012) Carbonate clumped isotope bond reordering and geospeedometry.  Earth and Planetary Science Letters v. 351-352, p. 223-236.  039_Passey_Henkes_2012.pdf

Passey BH (2012) Reconstructing terrestrial environments using stable isotopes in fossil teeth and paleosol carbonates. In Linda C. Ivany and Brian Huber, eds., Reconstructing Earth's Deep-Time Climate – The State of the Art in 2012.  Paleontological Society Papers 18, 167-193.  038_Passey_2012.pdf

*Henry AH, Ungar PS, Passey BH, Sponheimer M, Rossouw L, Bamford M, Sandberg P, de Ruiter DJ, Berger L (2012) The diet of Australopithecus sediba.  Nature 487, 90-93.  doi:10.1038/nature11185. 037_Henry_etal_2012.pdf

Hynek SA, Passey BH, Prado JL, Brown FH, Cerling TE, Quade J (2012) Small mammal carbon isotope ecology across the Miocene-Pliocene boundary, northwestern Argentina.  Earth and Planetary Science Letters 321-322, 177-178.  036_Hynek_etal_2012.pdf

Cerling TE, Levin NE, Passey BH (2011) Stable isotope ecology in the Omo-Turkana Basin.  Evolutionary Anthropology 20, 228-237.  035_Cerling_etal_2011.pdf

*Dennis KJ, Affek HP, Passey BH, Schrag DP, Eiler JM (2011) Defining an absolute reference frame for 'clumped' isotope studies of CO2.  Geochimica et Cosmochimica Acta 75, 7117-7131. doi:10.1016/j.gca.2011.09.025  034_Dennis_etal_2011.pdf

*Suarez MB&, Passey BH, Kaakinen A (2011) Paleosol carbonate multiple isotopologue signature of active East Asian summer monsoons during the late Miocene and Pliocene.  Geology 39, 1151-1154. doi:10.1130/G32350.1 033_Suarez_etal_2011.pdf

Ferry JM, Passey BH, Vasconcelos C, Eiler JM (2011) Formation of dolomite at 40-80C in the Latemar carbonate buildup, Dolomites, Italy, from clumped isotope thermometry. Geology 39, 571-574.  032_Ferry_etal_2011.pdf

Lee-Thorp JA, Sponheimer M, Passey BH, de Ruiter DJ, Cerling TE (2010) Stable isotopes in fossil hominin tooth enamel suggest a fundamental dietary shift in the Pliocene.  Philosophical Transactions of the Royal Society B. 365, 3389-3396.  031_Lee-Thorp_etal_2010.pdf

Passey BH, Levin NE, Cerling TE, Brown FH, Eiler JM (2010) High-temperature environments of human evolution in East Africa based on bond ordering in paleosol carbonates.  Proceedings of the National Academy of Sciences, USA. 107, 11245-11249. 030_Passey_etal_2010.pdf

Zazzo A, Balasse M, Passey BH, Moloney AP, Monahan FJ, Schmidt O (2010) The isotope record of short- and long-term dietary changes in sheep tooth enamel: Implications for quantitative reconstructions of paleodiets.  Geochimica et Cosmochimica Acta 74, 3571-3586. 029_Zazzo_etal_2019.pdf

Cerling TE, Harris JM, Leakey MG, Passey BH, Levin NE (2010) Stable carbon and oxygen isotopes in East African mammals: modern and fossil.  In Cenozoic Mammals of Africa, Werdelin L. and Sanders W. eds.  University of California Press, Berkeley.  pp. 941-952.  ISBN 978-0-520-25721-4  028_Cerling_etal_2010.pdf

Huntington KW, Eiler JM, Affek HP, Guo W, Bonifacie M, Yeung LY, Thiagarajan N, Passey B, Tripati A, Daeron M, Came R (2009) Methods and limitations of 'clumped' CO2 isotope (D47) analysis by gas-source isotope ratio mass spectrometry.  Journal of Mass Spectrometry 44, 1318-1329.  027_Huntington_etal_2009.pdf

Sponheimer M, Codron D, Passey BH, de Ruiter DJ, Cerling TE, Lee-Thorp JA (2009) Using carbon isotopes to track dietary change in modern, historical, and ancient primates.  American Journal of Physical Anthropology 140, 661-670. 026_Sponheimer_etal_2009.pdf

Passey BH, Ayliffe LK, Kaakinen A, Eronen JT, Zhang ZQ, Cerling TE, Fortelius M (2009) Strengthened East Asian summer monsoons during a period of high-latitude warmth?  Isotopic evidence from Mio-Pliocene fossil mammals and soil carbonates from northern China.  Earth and Planetary Science Letters 277, 443-452.  025_Passey_etal_2009.pdf  Passey_2009_Table1.xls Passey_2009_Table2.xls  Passey_2009_Table3.xls

Harris JM, Cerling TE, Leakey MG, Passey BH (2008)  Stable isotope ecology of fossil hippopotamids from the Lake Turkana Basin of East Africa.  Journal of Zoology 275, 323-331. 024_Harris_etal_2008.pdf

Cerling TE, Harris JM, Hart JA, Kaleme P, Klingel H, Leakey MG, Levin NE, Lewison RL, Passey BH (2008)  Stable isotope ecology of the common hippopotamus.  Journal of Zoology 276, 204-212.  023_Cerling_etal_2008.pdf

Podlesak DW, Torregrossa A-M, Ehleringer JR, Dearing MD, Passey BH, Cerling TE (2007) Turnover of oxygen and hydrogen isotopes in the body water, CO2, hair, and enamel of a small mammal.  Geochimica et Cosmochimica Acta 72, 19-35.  022_Podlesaketal2007.pdf

Passey BH, Cerling TE, Levin NE (2007) Temperature dependence of oxygen isotope acid fractionation for modern and fossil tooth enamels.  Rapid Communications in Mass Spectrometry 21, 2853-2859.  021_Passeyetal2007b.pdf

Passey BH, Eronen JT, Fortelius M, Zhang ZQ (2007) Paleoenvironments and paleodiets of late Miocene gazelles from North China: Evidence from stable carbon isotopes.  Vertebrata Palasiatica 45, 118-127. 020_Passeyetal2007a.pdf

Cerling TE, Ayliffe LK, Dearing MD, Ehleringer JR, Passey BH, Podlesak DW, Torregrossa AM, West AG (2007) Determining biological tissue turnover using stable isotopes: the reaction progress variable. Oecologia 151, 175-189. 019_Cerlingetal2007.pdf  Supplementary Material (excel)                        

Passey BH, and Cerling TE (2006) In situ stable isotope analysis (d13C, d18O) of very small teeth using laser ablation GC/IRMS. Chemical Geology 235, 238-249. 018_Passey&Cerling2006.pdf  data

Sponheimer M, Passey BH, de Ruiter DJ, Guatelli-Steinberg D, Cerling TE, Lee-Thorp J (2006) Isotopic evidence for dietary variability in the early hominin Paranthropus robustus. Science 314, 980-982.  017_Sponheimeretal2006.pdf  Perspective (Stan Ambrose)  Supplementary Material
Passey BH, Cerling TE, Chan MA (2006) Dam Fun: A scale-model classroom experiment for teaching basic concepts in hydrology and sedimentary geology. Journal of Geoscience Education 54, 487-490.  016_Passeyetal2006.pdf

Levin NE, Cerling TE, Passey BH, Harris JM, Ehleringer JR (2006) A stable isotope aridity index for terrestrial environments. Proceedings of the National Academy of Sciences 103, 11201-11205. 015_Levinetal2006.pdf

Robinson TF, Sponheimer M, Roeder BL, Passey BH, Cerling TE, Dearing MD, and Ehleringer JR (2006) Digestibility and nitrogen retention in llamas and goats fed alfalfa, C3 grass, and C4 grass hays.  Small Ruminant Research 64, 162-168. 014_Robinsonetal2006.pdf

Jokela, T, Eronen, JT, Kaakinen, A, Liu, LP, Passey BH, Zhang, ZQ, and Fu, MK. (2005). Translation of Otto Zdansky’s  “The localities of the Hipparion fauna of Baode County in northwest Shanxi”. Palaeontologia Electronica 8, Issue 1, Art. No. 3A. 013_Jokelaetal2005.pdf

Passey BH, Cerling TE, Schuster GT, Robinson TF, Roeder BL, Krueger SK, (2005) Inverse methods for estimating primary input signals from time-averaged intra-tooth isotope profiles.  Geochimica et Cosmochimica Acta 69, 4101-4116. 012_Passeyetal2005b.pdf  data

Passey BH, Robinson TF, Ayliffe LK, Cerling TE, Sponheimer M, Dearing MD, Roeder BL, Ehleringer JR, (2005) Carbon isotopic fractionation between diet, breath, and bioapatite in different mammals.  Journal of  Archaeological Science 32, 1459-1470. 011_Passeyetal2005a.pdf  data

Cerling TE, Passey BH, Ayliffe LK, Cook CS, Ehleringer JR, Harris JM, Dhidha MB, Kasiki SM (2004). Orphans’ tales: seasonal dietary changes in elephants from Tsavo National Park, Kenya.  Palaeogeography, Palaeoclimatology, Palaeoecology 206, 367-376. 010_Cerlingetal2004.pdf

Ayliffe LK, Cerling TE, Robinson T, West AG, Sponheimer M, Passey BH, Hammer J, Roeder B, Dearing MD, and Ehleringer JR (2003) Turnover of carbon isotopes in tail hair and breath CO2 of horses fed an isotopically varied diet.  Oecologia 139, 11-22. 009_Ayliffeetal2004.pdf 

Passey BH and Cerling TE (2004) Response to comment by M.J. Kohn on “Tooth enamel mineralization in ungulates: Implications for recovering a primary isotopic time-series” by B.H. Passey and T.E. Cerling (2002).  Geochimica et Cosmochimica Acta 68, 407-409. 008_PasseyandCerling2004.pdf  Kohn2004comment.pdf

Sponheimer M, Robinson TF, Roeder BL, Passey BH, Ayliffe LK, Cerling TE, Dearing MD, Ehleringer JR (2003) An experimental study of nitrogen flux in llamas: is 14N preferentially excreted?  Journal of Archaeological Science 30, 1649-1655. 007_Sponheimeretal2003.pdf

Sponheimer M, Robinson T, Ayliffe L, Roeder B, Hammer J, Passey B, West A, Cerling T, Dearing D, Ehleringer J (2003) Nitrogen isotopes in mammalian herbivores: Hair d15N values from a controlled feeding study.  International Journal of Osteoarchaeology 13, 80-87. Sponheimeretal2003.pdf 

Sponheimer M, Robinson T, Ayliffe L, Passey B, Roeder B, Shipley L, Lopez E, Cerling T, Dearing D, Ehleringer J (2003) An experimental study of carbon-isotope fractionation between diet, hair, and feces of mammalian herbivores.  Canadian Journal of Zoology 81, 871-876. 005_Sponheimeretal2003.pdf

Cerling TE, Harris JM, Passey BH, (2003) Diets of east African Bovidae based on stable isotope analysis.  Journal of Mammalogy 84, 456-470. 004_Cerlingetal2003.pdf

Sponheimer M, Robinson T, Roeder B, Hammer J, Ayliffe L, Passey B, Cerling T, Dearing D, Ehleringer J (2003) Digestion and passage rates of grass hays by llamas, alpacas, goats, rabbits, and horses.  Small Ruminant Research 48, 149-154. 003_Sponheimeretal2003.pdf

Passey BH and Cerling TE (2002) Tooth enamel mineralization in ungulates: Implications for recovering a primary isotopic time-series:  Geochimica et Cosmochimica Acta 66, 3225-3234. 002_PasseyandCerling2002.pdf 

Passey BH, Cerling TE, Perkins ME, Voorhies MR, Harris JM, and Tucker ST, (2002) Environmental change in the Great Plains: An isotopic record from fossil horses.  Journal of Geology 110, 123-140.
 001_Passeyetal2002.pdf  data