Research Associate & Marine Superintendent
Large Lakes Observatory
University of Minnesota Duluth
2205 E. 5th St.,
Research Laboratory Building 214
Duluth, MN 55812
Tel. (218) 726-7826
Fax: (218) 726-6979
email: ricketts at d.umn.edu
Multibeam and Side Scan images of the floor of Lake Superior
The use of stable isotopes and trace metals to understand past climate in lacustrine basins. Field areas include the East African Rift Lakes and Issyk-Kul in Kyrgyzstan.
Duke University, Ph.D.
Ohio State University, B.S.
Yu, S., Ricketts, R. D., and Colman, S. M., 2008. Determining the spatial and temporal patterns of climate changes in China’ western interior during the last 15,000 years from lacustrine oxygen isotope records. J. of Quat. Sci., DOI: 10.1002/jqs.1229.
Park, L.E., and Ricketts, R.D., 2003. Evolutionary history of the Ostracoda and the origin of nonmarine faunas, in: Bridging the Gap: Trends in the Ostracode Biological and Geological Sciences, The Paleontological Society Special Papers, v. 9 ., eds. L. E. Park and A. J. Smith. Yale University Press, New Haven, pp. 11-36.
Ferronskii, V. I., V. A. Polyakov, V. S. Brezgunov, L. S. Vlasova, Yu. A. Karpychev, A. F. Bobkov, V. V. Romaniovskii, T. C. Johnson, R. D. Ricketts, and K. A. Rasmussen, 2003. Variations in the hydrological regime of Kara-Bogaz-Gol Gulf, Lake Issyk-Kul, and the Aral Sea assessed based on data of bottom sediment studies. Water Resources, v. 30, p. 252-259. Translated from Vodnye Resursy, v. 30, 2003, p. 281-288.
H. Lamb, S. Kebede, M. Leng, R. D. Ricketts, R. Telford, and M. Umer, 2002. Origin and isotope composition of aragonite laminae in an Ethiopian crater lake, in: The East African Great Lakes: Limnology, Palaeolimnology and Biodiversity , eds. E. O. Odada and D. O. Olago. Kluwer Academic Publishers, Dordrecht, Netherlands, pp. 487-508.
R. D. Ricketts, T. C. Johnson, E. T. Brown, K. A. Rasmussen, and V. V. Romanovsky, 2001. Trace element and stable isotope study of the Holocene paleoclimate of Lake Issyk-Kul. Palaeogeography, Palaeoclimatology, Palaeoecology, 176, pp. 207-227.
K. A. Rasmussen, R. D. Ricketts, T. C. Johnson, V. V. Romanovsky, and O. M. Grigina, 2001. An 8,000 Year Multi-proxy Record from Lake Issyk-Kul, Kyrgyzstan. PAGES News , vol. 9 (2), pp. 5-6.
R. D. Ricketts and R. Anderson, 2001. Stable isotope study of Lake Turkana, East Africa. in: Use of isotope techniques in lake dynamics investigations, IAEA Tecdoc 1206 . International Atomic Energy Agency, pp. 97-104.
R. D. Ricketts, 1998. A comparison between the stable isotopic composition of early Holocene and late Pleistocene carbonates from Lake Malawi, East Africa, in: Environmental Change and Response in East African Lakes , ed. J. Lehman. Kluwar Academic Publishers, Dordrecht, Netherlands, pp.191-206.
R. D. Ricketts and R. Anderson, 1998. A direct comparison between the historical record of lake level and the d 18 O signal in carbonate sediments from Lake Turkana, Kenya. Limnology and Oceanography, 43(5), pp. 811-822.
R. D. Ricketts, and T. C. Johnson, 1996. Climate change in the Turkana Basin as deduced from a 4000 year long δ18O record.Earth and Planetary Science Letters, 142:7-17.
R. D. Ricketts and T. C. Johnson, 1996. Early Holocene changes in lake level and productivity in Lake Malawi as interpreted from oxygen and carbon isotopic measurements from authigenic carbonates, in: The Limnology, Climatology, and Paleoclimatology of the East African Lakes , eds. T. C. Johnson and E. O. Odada. Gordon and Breach, Newark, N.J., pp. 475-494.
T. C. Johnson, C.A. Scholz, T.R. Talbot, K. Kelts, R. D. Ricketts, G. Ngobi, K. Beuning, I. Ssemmanda, and J. A. McGill, 1996. Late Pleistocene desiccation of Lake Victoria and rapid evolution of Cichlid fishes. Science, 273:1091-1093.