[1] NOAA, Aeron Lab, Boulder, CO 80303 USA
[2] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[3] Natl Ctr Environm Predict, Washington, DC 20233 USA
[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[5] NASA, Langley Res Ctr, Aerosol Res Branch, Hampton, VA 23665 USA
[6] Hampton Univ, Dept Phys, Hampton, VA 23665 USA