HR: 1340h
AN: A53B-1147    [Abstracts]
TI: Attenuated Total Reflection Infrared Spectroscopy of Ice Films
AU: * Riggio, G
EM: griggio@rmc.edu
AF: Randolph-Macon College, P.O. Box 5005, Ashland, VA 23005, United States
AU: Michelsen, R R
EM: rmichelsen@rmc.edu
AF: Randolph-Macon College, P.O. Box 5005, Ashland, VA 23005, United States
AB: Ice near its melting point displays a mobile, dynamic layer where adsorption of gases and chemical reactions are most likely to occur. Studies of ice at these temperatures are lacking. A custom-made attenuated total reflection infrared spectroscopy (ATR-IR) apparatus was built to study ice films at temperatures relevant to the boundary layer and high latitudes. ATR-IR spectra of water and ice films over a range of temperature (-15 ° C to 25 ° C) will be presented. Probe molecules (e.g., acetic acid) were used to investigate the proton-donating ability of the bulk ice and ice surface. Spectral changes of the probe molecules with pH in liquid solutions as well as frozen films will be analyzed.
DE: 0365 Troposphere: composition and chemistry
DE: 0738 Ice (1863)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting