HR: 1340h
AN: A13D-0967    [Abstracts]
TI: Observations And Trends Of Chemically Active Stratospheric Constituents
AU: * Hannigan, J W
EM: jamesw@ucar.edu
AF: National Center for Atmospheric Research, POBox 3000, Boulder, CO 80307 United States
AU: Coffey, M T
EM: coffey@ucar.edu
AF: National Center for Atmospheric Research, POBox 3000, Boulder, CO 80307 United States
AU: Goldman, A
EM: goldman@ucar.edu
AF: University of Denver, Dept. of Physics, Denver, CO 80208 United States
AB: An inter-compared solar viewing 0.0035cm^-1 resolution Fourier transform infrared spectrometer has been installed in Thule, Greenland (76.5N, 68.8W, 225masl) since October 1999. This is part of the arctic primary site for the Network for the Detection of Stratospheric Change (NDSC) [Kurylo and Zander, 2001]. The autonomously controlled instrument has recorded spectra in the 750-5000cm^-1 region at a rate of 25% of possible observing days since that time excluding polar night (~20 Oct to ~20 Feb). Constituent analysis of the high-resolution solar spectra is performed using the optimal estimation technique implemented in SFIT2. Total column abundances and chemical composition information on a coarse vertical scale are retrieved. We present and discuss the trend in the Arctic stratosphere for years 1999 to 2005 of chemically active stratospheric species O₃, HCl, HNO₃ as well as inactive species HF and N₂O. Kurylo, M. J., and R. J. Zander, The NDSC-Its status after ten years of operation, in Proceedings of the Quadrennial Ozone Symposium, Sapporo 2000, pp. 167- 168, Hokkaido Univ., Sapporo, Japan, 2001.
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 0342 Middle atmosphere: energy deposition (3334)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005