1. Department of Earth and Atmospheric Sciences; University of Nebraska-Lincoln; Lincoln Nebraska USA
2. Department of Geological and Mining Engineering and Sciences; Michigan Technological University; Houghton Michigan USA
3. Department of Atmospheric and Oceanic Science; University of Maryland; College Park Maryland USA
4. Geophysical Fluid Dynamics Laboratory; NOAA; Princeton New Jersey USA
5. Atmospheric Chemistry and Dynamics Laboratory; NASA Goddard Space Flight Center; Greenbelt Maryland USA