The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States
National Oceanographic and Atmospheric Administration, Climate Monitoring and Diagnostics Laboratory R/CMDL1 325 Broadway, Boulder, CO 80305 United States
The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States ;
The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States ;
The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States ;
The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States ;
The Pennsylvania State University, Department of Meteorology 503 Walker Building, University Park, PA 16802 United States ;