HR: 0800h
AN: A51C-0775    [Abstracts]
TI: Comparison of ECMWF assimilated Ozone Data with Measurements
AU: * Jiang, X
EM: xun@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125
AU: Camp, C D
EM: cdc@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125
AU: Shia, R
EM: rls@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125
AU: Yung, Y L
EM: yly@gps.caltech.edu
AF: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125
AB: Assimilated European Center for Medium-Range Weather Forecasts (ECMWF) column ozone data is compared to the TOMS/SBUV Merged Ozone Data Set and the radiosonde data in the high latitudes of the Northern Hemisphere. The agreement is found to be excellent from 1979 to 1988 and from 1991 to 2002. For the two years 1989 and 1990, during which the assimilation was not used, the agreement is poor. This demonstrates the importance of assimilation. We also carried out a study of the temporal and spatial patterns of the interannual variability of total column ozone in the northern hemisphere polar region in the first versus the second period of the ECMWF assimilated data. The variability is closely associated with the dynamical forcing of the stratosphere by the troposphere via the divergence of the Eliassen-Palm flux.
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3362 Stratosphere/troposphere interactions
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting