Solar Cycle Variation in the Ozone Distribution Simulated by a Two-dimensional Chemistry Transport Model

Details Solar Cycle Variation in the Ozone Distribution Simulated by a Two-dimensional Chemistry Transport Model Solar Cycle Variation in the Ozone Distribution Simulated by a Two-dimensional Chemistry Transport Model

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh52b..06c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH52B-06

Physics

0340 Middle Atmosphere: Composition And Chemistry, 0341 Middle Atmosphere: Constituent Transport And Chemistry (3334), 1620 Climate Dynamics (3309), 1650 Solar Variability, 3334 Middle Atmosphere Dynamics (0341, 0342)

Scientific paper

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.

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