BBAuthors: Izquierdo-Verdiguier E.; Advisor: -; Participants: Zurita-Milla R.; Ault T.R.; Schwartz M.D. (2018.)
The spatial analysis shows a significantly delayed spring onset in the northern US whereas in the western and the Great Lakes region, spring onset advances. The mean temporal variabilities of the indices were analyzed for the nine major climatic regions of the US and results showed a clear division into three main groups: early, average and late spring onset. Finally, the region belonging to each group was mapped. These examples show the potential of our four phenological products to improve understanding of the responses of ecosystems to a changing climate. 
