Identifying the drivers of the observed springtime cooling trend in northern North America with large ensemble simulations

Zachary Michael Labe, Princeton University & NOAA GFDL, Program in Atmospheric and Oceanic Sciences, Princeton, United States, Nathaniel C Johnson, NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States and Thomas L Delworth, NOAA/GFDL, Princeton, NJ, United States