Growing uncertainty in projected spring onset variability in the Northern Hemisphere
Xiaolu Li1, Toby Ault2, Colin Evans2, Flavio Lehner3, Carlos Carrillo1, Alison Donnelly4, Theresa M Crimmins5, Amanda S Gallinat6 and Mark D Schwartz7, (1)Cornell University, Ithaca, NY, United States, (2)Cornell University, Department of Earth and Atmospheric Science, Ithaca, NY, United States, (3)National Center for Atmospheric Research, Boulder, United States, (4)University of Wisconsin Milwaukee, Milwaukee, WI, United States, (5)USA National Phenology Network, Tucson, AZ, United States, (6)University of Wisconsin Milwaukee, Milwaukee, United States, (7)UW-Milwaukee, Milwaukee, WI, United States
