I am Jiaying's research advisor. My specialty is biogeography, paleolimnology, paleoclimatology, water resources, and climate change. My team and I have reconstructed paleoclimate change spanning for late Quaternary for multiple mid-to high latitud sites, including Russia, Canada, Sierra Nevada in California, Rocky mountain regions in Colorado, by using chironomid as a biomark proxy. I am very excited about Jiaying's Costa Rica project, and expecting to see how did thermal conditions vary in Costa Rica (within low-latitude region) during Holocene and how fire history and landscape change can be linked to the Holocene hydroclimate change. Some stories from the field: http://geography.uga.edu/article/a-rare-glimpse-in...