Campus Address: Classroom Building A220
My research interests include Quaternary paleoecology, paleoclimatology, biogeography, and global change, and I am especially interested in understanding changing environmental conditions in arid environments from the last ice age until present. I use macrofossils and pollen from packrat middens to reconstruct vegetation and climate dynamics since the last ice age, and my research has taken me to deserts of western North and South America.
I teach courses in paleoclimatology, biogeography, global change, climatology, and physical geography.
Holmgren, C.A., Betancourt, J.L., and K.A. Rylander. 2011. Vegetation history along the eastern, desert escarpment of the Sierra San Pedro Martir, Baja California, Mexico. Quaternary Research 75, 647-657.
Holmgren, C.A., Betancourt, J.L., and K.A. Rylander. 2010. A Long Term Vegetation History of the Mojave/Colorado Desert Ecotone at Joshua Tree National Monument. Journal of Quaternary Science 25, 222-236
Placzek, C., Quade, J., Betancourt, J.L., Patchett, P.J., Rech, J.A., Latorre, C., Matmon, A., Holmgren, C.A., English, N.B. 2009. Climate in the dry, central Andes over geologic, millennial, and interannual timescales. Annals of the Missouri Botanical Gardens 96, 386-397.
Holmgren, C. A., Rosello, E., Latorre, C., and Betancourt, J. L. 2008. Late Holocene fossil rodent middens from the Arica region of northernmost Chile. Journal of Arid Environments 72, 677-686.
Holmgren, C.A. 2007. Paleoenvironmental response of the northern Chihuahuan Desert to the Bølling/Allerød-Younger Dryas climatic oscillation. Invited paper for Current Research in the Pleistocene 24, 7-10.
Holmgren, C.A. 2007. Book review of Dry Borders: Great Natural Reserves of the Sonoran Desert. Felger, R. S. and Broyles, B. The Quarterly Review of Biology 82, 304.
Holmgren, C.A., Norris, J., and Betancourt, J.L. 2007. Inferences about winter temperatures and summer rains from the late Quaternary record of C4 perennial grasses and C3 desert shrubs in the northern Chihuahuan Desert. Journal of Quaternary Science 22, 141-161.
Holmgren, C. A., Betancourt, J.L., and Rylander, K. A. 2006. A 36,000-yr B.P. vegetation history from the Peloncillo Mountains, southeastern Arizona, USA. Palaeogeography, Palaeoclimatology, Palaeoecology 240, 405-422.
Latorre, C. L., Betancourt, J. L., Rech, J. A., Quade, J., Holmgren, C., Placzek, C. P., Vuille, M., Rylander, K. A. 2005. Late Quaternary History of the Atacama Desert. In M. Smith & P. Hesse, Eds., 23 Degrees South: Archaeology and Environmental History of the Southern Deserts. National Museum of Australia.
Holmgren, C. A., Peñalba, M. C., Rylander, K. A. and Betancourt, J. L. 2003. A 16,000 14C yr BP packrat midden series from the U.S.A.-Mexico Borderlands. Quaternary Research 60, 319-329.
Holmgren, C. A., Betancourt, J. L., Rylander, K. A., Roque, J., Tovar, O., Zeballos, H., Linares, E., and Quade, J. 2001. Holocene vegetation history from fossil rodent middens near Arequipa, Peru. Quaternary Research 56, 242-251.