Stacy E Porter, Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH, United States, Ellen Mosley-Thompson, Ohio State University Main Campus, Department of Geography, Columbus, OH, United States, Lonnie G Thompson, Ohio State University Main Campus, School of Earth Sciences, Columbus, OH, United States and Aaron Wilson, The Ohio State University, Byrd Polar and Climate Research Center, Columbus, OH, United States