HR: 17:20h
AN: SH52B-06    [PDF]
TI: Solar Cycle Variation in the Ozone Distribution Simulated by a Two-dimensional Chemistry Transport Model
AU: * Camp, C D
EM: cdc@gps.caltech.edu
AF: Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AU: Feynman, J
AF: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 United States
AU: Jiang, X
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AU: Shia, R
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AU: Walker, C
AF: Division of Geological and Planetary Sciences and Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AU: Schneider, T
AF: Division of Geological and Planetary Sciences and Division of Engineering and Applied Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AU: Allen, M A
AF: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 United States
AU: Yung, Y L
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 United States
AB: The meridional circulation derived from the NCEP/NCAR Reanalysis II data from 1979 to 2000, combined with the solar UV radiation with the 11 year variation, is used to drive the Caltech/JPL two-dimensional (2-D) chemistry and transport model (CTM). The monthly UV fluxes are generated using the monthly solar cycle variation of the 10.7 cm flux data and the solar cycle maximum and minimum flux data measured by UARS/SOLSTICE as a function of wavelength. The wavelength range is from 119.5 nm to 318.5 nm, encompassing the most important wavelengths influencing the production and destruction of ozone. A principal component analysis is applied to the model simulated ozone distribution from 1980 to 2000. The decadal signal is found in the column ozone density, but the signal is smaller than that found in a similar analysis of the merged TOMS/SBUV ozone data. The main source of the decadal variations in the column ozone density is the meridional circulation. However, the direct effect of the UV variation can be seen primarily in the upper stratosphere and above.
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 1620 Climate dynamics (3309)
DE: 1650 Solar variability
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting