My research is broadly centered on using sediment cores to evaluate past changes in Southern Hemisphere climate, carbon cycling, and marine biogeochemical cycling. I use the geologic record to identify how large-scale coupled climate modes and key components of the global climate system have changed in the past and how the variability and magnitude of past change compares to modern observations. I primarily apply light stable isotopes, major element geochemistry, and natural abundance radiocarbon to lacustrine, peatland, marine, and fjord sediment records obtained from New Zealand, the subantarctic Auckland Islands, southern South America, and the Gulf of Alaska to evaluate past change.
