HR: 11:05h
AN: A12A-03 [Abstracts]
TI: Infrared measurements of the atmospheric of HCN and CH3CN
AU: * Kleinboehl, A
EM: Armin.Kleinboehl@jpl.nasa.gov
AF: Jet Propulsion Laboratory, Mail-Stop 183-501
4800 Oak Grove Drive, Pasadena, CA 91109
United States
AU: Toon, G C
EM: toon@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, Mail-Stop 183-501
4800 Oak Grove Drive, Pasadena, CA 91109
United States
AU: Sen, B
EM: sen@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, Mail-Stop 183-501
4800 Oak Grove Drive, Pasadena, CA 91109
United States
AU: Blavier, J L
EM: blavier@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, Mail-Stop 183-501
4800 Oak Grove Drive, Pasadena, CA 91109
United States
AU: Weisenstein, D K
EM: weisenstein@aer.com
AF: Atmospheric and Environmental Research, Inc., 131 Hartwell Ave., Lexington, MA 02421
United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125
United States
AB:
We present vertical profiles of CH3CN and HCN in the Earth's atmosphere measured by infrared remote sensing. These profiles
were retrieved from 12 solar occultations by the balloon-borne JPL MkIV interferometer between 1993 and 2004 in the Arctic
and at mid-latitudes. CH3CN profile retrieval is possible in an altitude range between 12 and 30 km. The retrieved CH3CN
profiles show mixing ratios of 100-150 ppt a few kilometers above the tropopause that decrease to zero at altitudes between
24 and 30 km and reveal a reasonably compact correlation with the stratospheric tracers CH3Cl and CH4. HCN retrievals show
mixing ratios of ~200 ppt around the tropopause that decrease much more slowly with altitude than CH3CN. The measurements are
compared with output of a 2-dimensional model and discussed within the framework of our current understanding of
pseudohalogen chemistry.
DE: 0335 Ion chemistry of the atmosphere (2419, 2427)
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005