1. The National Ecological Observatory Network; 1685 38th St. Boulder Colorado 80301 USA
2. Department of Ecology and Evolutionary Biology; University of Colorado; Boulder Colorado 80309 USA
3. NASA Goddard Institute for Space Studies; 2880 Broadway New York New York 10025 USA
4. Department of Botany and Plant Sciences; University of California; Riverside California 92521 USA
5. USA National Phenology Network; National Coordinating Office; 1955 E. 6th Street Tucson Arizona 85719 USA
6. DOI Southwest Climate Science Center; U.S. Geological Survey; 1064 E. Lowell Street Tucson Arizona 85721 USA
7. Denver Botanic Gardens; 909 York Street Denver Colorado 80206 USA
8. Department of Forest Ecosystems and Society; Oregon State University; Corvallis Oregon 97331 USA
9. Department of Ecology, Evolution and Marine Biology; University of California; Santa Barbara California 93106 USA
10. National Park Service; Acadia National Park and Schoodic Education and Research Center; Bar Harbor Maine 04660 USA
11. School of Natural Resources and the Environment; University of Arizona; 1064 East Lowell Street Tucson Arizona 85721 USA
12. Department of Geography; University of Wisconsin-Milwaukee; PO Box 413 Milwaukee Wisconsin 53201 USA
13. US Geological Survey; 1955 East 6th St. Tucson Arizona 85721 USA