Sean M Davis, NOAA Boulder, Earth System Research Laboratory, Boulder, CO, United States, Jeannette Wild, NOAA NWS NCEP, Climate Prediction Center, College Park, MD, United States, Irina V Petropavlovskikh, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, Craig S Long, NOAA Science Center, College Park, MD, United States and Karen Hepler Rosenlof, NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States