Acknowledgement
Although preparation of this article was funded by the U.S. Environmental Protection Agency through grant/cooperative agreement CR 830929, and by the National Oceanic and Atmospheric Administration, U.S. Department of Commerce grant award NA08NMF4520492 to the University of North Dakota Energy & Environmental Research Center, it has not been subjected to the peer and policy review of these sponsors and therefore does not necessarily reflect their views and no official endorsements should be inferred.