This collaborative project is collecting paleoclimate proxy daya from locations in Southern Hemisphere tropical and mid-latitude locations and using these data to constrain global circulation model (GCM) simulations of climate change. The research aims include 1) developing a continuous record of Holocene climate change near the largest tropical ice cap, Peru’s Quelccaya Ice Cap; 2) tracking Little Ice Age climate conditions over a broader area of the Andes; and 3) using a GCM to evaluate which mechanistic hypotheses explain the geographical and temporal patterns of reconstructed paleoclimate fluctuations. Results thus far from this research include: Kelly et al., 2012, doi.org/10.1130/G33430.1; Beal et al., 2013, doi.org/10.1021/es402317x; Beal et al., 2014,doi:10.1002/2013GB004780; Stroup et al., 2014, doi.org/10.1130/G35245.1; Malone et al., 2015,doi:10.1016/j.quascirev.2015.08.001.
My collaborators on this project are Yarrow Axford (Northwestern University), Thomas Lowell (University of Cincinnati) and Raymond Pierrehumbert (now at University of Oxford).
In addition to developing paleoclimate data near Quelccaya, I determined a low-latitude, high-altitude 10Be production rate using radiocarbon as an independent dating method (Kelly et al., 2015,doi:10.1016/j.quageo.2013.10.007). This 10Be production-rate calibration is in collaboration with the NSF-funded initiative CRONUS-Earth (Phillips et al., 2015a, doi:10.1016/j.quageo.2015.04.010; Phillips et al., 2015ab, doi:10.1016/j.quageo.2015.09.006; Phillips et al., 2015c).
Funding for my Peru research is from NSF (EAR-1003460), CRONUS-Earth, the Lamont Climate Center, the Comer Family Foundation and Dartmouth College.