Early and late season warming affects nitrogen dynamics in a polygonal tundra landscape: Analyses using ecosys and NGEE-Arctic observations in Barrow, Alaska

William J Riley1, Robert F Grant2, Nicholas Bouskill3, Baptiste Dafflon1, David E Graham4, Zelalem A Mekonnen1, Ji-Won Moon5, Jinyun Tang6 and Haruko M Wainwright7, (1)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (2)University of Alberta, Edmonton, AB, Canada, (3)Lawrence Berkeley National Laboratory, Ecology, Berkeley, CA, United States, (4)Oak Ridge National Laboratory, Biosciences Division, Oak Ridge, TN, United States, (5)Oak Ridge National Laboratory, Oak Ridge, TN, United States, (6)Lawrence Berkeley National Laboratory, Climate and Ecosystem Sciences Division, Berkeley, United States, (7)Lawrence Berkeley National Laboratory, Berkeley, United States