Justin P. Dodd
Assistant Professor
Stable Isotope Geochemistry
Office: 302C Davis Hall
Phone: 815.753.7949
E-mail: jdodd@niu.edu
Educational Background
B.S., Beloit College, WI, 2003
M.S., University of Saskatchewan, 2006
Ph.D., University of New Mexico, 2011
Research Interests
My research focuses on applications of stable isotope geochemistry in a range of geological and environmental settings including paleoclimate reconstruction, paleoecology, archeology, hydrology, biology, and isotope forensics.
Research Activities
Current Research
- oxygen and silicon isotope values in diatom silica as records of paleoclimatic and paleohydrologic change in the Valles Caldera (NM, USA), the Antarctic, and other freshwater and marine locations
- post-mortem alteration of oxygen and silicon isotope values in diatom silica
Developing Research
- 18O and 17O analyses of silicate and sulfate minerals in terrestrial and extra-terrestrial settings
- oxygen, carbon, and hydrogen isotope analyses of tree-ring cellulose as records of paleoclimatic variability North and South America
- carbon and oxygen isotopes in lacustrine carbonate and speleothems Yucatán, Mexico
- sulfur isotope analyses for a wide variety of applications
Selected Publications
Dodd, J.P., Sharp, Z.D., Fawcett, P.J., in preparation for submission to Earth and Planetary Science Letters, Evidence for precipitation variability during interglacial and glacial periods MIS 11 and 12 as recorded by diatom silica δ18O values from the Valles Caldera, New Mexico.
Dodd, J.P., Sharp, Z.D., Fawcett, P.J., Brearley, A., in preparation for submission to Palaeogeography, Palaeoclimatology, Palaeoecology, Maturation of diatom silica δ18O values within one growing season: implications for diatom silica isotopes as paleoclimate proxies.
Chapligin, B., Leng, M.J., Webb, E., Alexandre, A., Dodd, J.P., Lücke, A., Ijiri, A., Shemesh, A., Abelmann, A., Okazaki, T., Longstaffe, F., Herzschuh, A., Meyer, H., Moschen, R., Sharp, Z., Sloane, H.J., Sonzogni, C., Swann, G E.A., Sylvestre, F., Tyler, J.J., & Yam, R.., In press, Inter-laboratory comparison of oxygen isotopes from biogenic silica, Geochimica et Cosmochimica Acta. Available online 16 August 2011, ISSN 0016-7037, DOI: 10.1016/j.gca.2011.08.011. (http://www.sciencedirect.com/science/article/pii/ S0016703711004674)
Dodd, J.P., and Sharp, Z.D., 2010, A laser fluorination method for oxygen isotope analysis of biogenic silica and a new oxygen isotope calibration of modern diatoms in freshwater environments, Geochimica et Cosmochimica Acta, 74 (4): 1381-1390, (DOI 10.1016/j.gca.2009.11.023).
Schiff, C.J., Kaufman, D.S., Wolfe, A.P., Dodd, J.P., and Sharp, Z.D., 2009, Late Holocene storm-trajectory changes inferred from the oxygen isotope composition of lake diatoms, south Alaska. Journal of Paleolimnology, 41(1): 189-208 (DOI 10.1007/ s10933-008-9261-z).
Dodd, J.P., Patterson, W.P., Holmden, C., Brasseur, J.M., 2008. Robotic micromilling of tree rings: a new tool for obtaining subseasonal environmental isotope records. Chemical Geology, 252(1-2) 21-30. DOI 10.1016/j.chemgeo.2008.01.021.