1. NOAA's National Climatic Data Center; Boulder Colorado USA
2. Environment and Sustainability Program, School of Earth, Ocean, and Environment; University of South Carolina; Columbia South Carolina USA
3. Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
4. NOAA's National Climatic Data Center; Asheville North Carolina USA
5. Oeschger Centre for Climate Change Research and Institute of Geography; University of Bern; Bern Switzerland