HR: 0830h
AN: A21D-1015    [PDF]
TI: QBO and QBO-annual Beat Signals in the Tropical Total Column Ozone Simulated by a Two-dimensional Chemistry and Transport Model
AU: * Jiang, X
EM: xun@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Camp, C D
EM: cdc@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Shia, R
EM: rls@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Noone, D
EM: dcn@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Walker, C
EM: chrisw@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Schneider, T
EM: tapio@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AU: Yung, Y L
EM: yly@gps.caltech.edu
AF: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 United States
AB: The NCEP/NCAR Reanalysis II 4-times daily spectral coefficients are used to calculate the monthly mean meridional circulations from 1979 to 2000 to drive the Caltech/JPL two-dimensional (2-D) chemistry and transport model. The first two empirical orthogonal functions (EOFs) of the stratospheric stream function capture 88% of the total variance. The first EOF captures over 70% of the variance and is related to the quasi-biennial oscillation (QBO) and QBO-annual beat signal in the meridional circulation. The 2-D model provides realistic simulations of the seasonal and interannual variability of ozone in the tropics. The equatorial ozone anomaly from the 2-D model is close to that derived from TOMS/SBUV merged total ozone data sets. The phase and amplitude of the QBO signal are well captured by the model. The QBO-annual beat signal found in the simulated ozone agrees well with that in the TOMS/SBUV merged total ozone data sets.
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3337 Numerical modeling and data assimilation
DE: 5704 Atmospheres--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting