Profile Details
Elizabeth Peneycad
My overall research interest is in Quaternary palaeoclimatology. More specifically, I am interested in how the oxygen isotope geochemistry of fossil mammal teeth can be used to reconstruct variations in past seasonal temperatures between and within different climate stages during the Quaternary period.
PhD Research
Past Life and Environments

Oxygen isotopes in small mammal dental carbonates: investigating their use as a proxy for reconstructing Quaternary climate variability

The oxygen isotope analysis of fossil mammalian teeth is a well-established technique for palaeoclimate reconstruction. However, the utilization of this technique for understanding seasonal temperature changes during the Quaternary period has thus far been fairly limited. Recent studies have highlighted the potential for using oxygen isotopes in small mammal teeth as a proxy for past climatic conditions. However, the relationship between the oxygen isotope compositions of rodent teeth and local climate, and the factors that can influence this relationship, are poorly understood. Establishing a robust modern calibration between oxygen isotopes in rodent teeth and climate would enable quantitative palaeoclimate reconstructions to be generated for sites that are rich in fossil teeth, such as river and cave sequences. Moreover, Grimes et al. (2003) proposed a novel approach for quantitatively reconstructing past summer temperatures, through coupling the oxygen isotope values of rodent teeth and coeval freshwater biominerals. As yet, however, this method has not been tested for multiple Quaternary sites, despite the abundance of fossil remains available for analysis. This research consequently aims to: 1) investigate the sources of isotope variability in modern rodent populations across Britain, 2) establish a modern fractionation equation relating oxygen isotope compositions of rodent teeth and local meteoric water, 3) test whether the coupled oxygen isotope analysis of rodent teeth and freshwater shell carbonates can produce reliable temperature estimates for past interglacial stages in Britain, and 4) examine whether millennial-scale climatic fluctuations can be identified in the isotopic compositions of rodent teeth derived from 2 cave sedimentary sequences in Britain.
Ian Candy
Danielle Schreve
Quaternary Science
Physical Geography and Geology
Work & Volunteer Experience
Visiting Tutor and Teaching Assistant
Royal Holloway, University of London
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