[1] Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA
[2] Max Planck Inst Chem, D-55020 Mainz, Germany
[3] GATS Inc, Hampton, VA 23666 USA
[4] Univ Aquila, Dipartimento Fis, I-67100 Laquila, Italy
[5] Hampton Univ, Ctr Atmospher Sci, Hampton, VA 23681 USA