The United States Summertime "Warming Hole": Comparing the Contributions from Aerosol Forcing and Internal Variability

Antara Banerjee1, Prof. Lorenzo M Polvani, PhD1 and John C Fyfe2, (1)Columbia University of New York, Palisades, NY, United States, (2)Environment Canada, Canadian Centre for Climate Modeling and Analysis, Victoria, BC, Canada