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Date(s) - 04/06/2016
3:30 pm - 4:30 pm


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Presenter: Julio Betancourt, National Research Program, Water Mission Area
Seasonal timing has myriad impacts on plants and animals, biospheric processes, and human systems, and is critical for formulating adaptive responses to both climate variability and change. In the U.S., and especially, the timing of seasonal transitions varies widely from year to year and is also changing directionally, yet the climatic drivers, patterns, and consequences of these variations are not well understood. Julio will discuss day-of-year (DOY) metrics that define spring onset in the U.S. His presentation will reconcile different interpretations of large-scale drivers, and discuss opportunities for long-range forecasting, and will conclude with an exciting new study that will show how climatic dipoles North America drive broad scale, synchronized seed production (masting) in conifers that one or two years later push and pull boreal bird irruptions across North America.

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