|
Detailed Reference Information |
Jiang, X., Jones, D.B.A., Shia, R., Waliser, D.E. and Yung, Y.L. (2005). Spatial patterns and mechanisms of the quasi-biennial oscillation–annual beat of ozone. Journal of Geophysical Research 110: doi: 10.1029/2005JD006055. issn: 0148-0227. |
|
An idealized two-dimensional chemistry and transport model is used to investigate the spatial patterns of, and mechanism for, the quasi-biennial oscillation--annual beat (QBO-AB) signal in ozone in the tropics and subtropics. Principal component analysis is applied to the detrended, deseasonalized, and filtered total column ozone anomaly from the standard model. The first two empirical orthogonal functions (EOFs) capture over 98.5% of the total variance. The first EOF, accounting for 70.3% of the variance, displays a structure attributable to the approximately symmetric QBO with a period of 28 months. The second EOF, capturing 28.2% of the variance, is related to the QBO-AB around 20 months. An extended EOF analysis reveals the characteristic pattern of the downward propagation of QBO and upward propagation of QBO-AB. The model results are compared to those from the merged ozone data. Sensitivity experiments indicate that the QBO-AB is produced primarily as a result of the dynamical QBO-AB in the mean meridional circulation and by the interaction between the QBO and the annual cycle in transport, each contributing roughly equally to the forcing of QBO-AB. The interaction between the QBO in the transport fields and the annual cycle in chemistry plays a minor role. |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Atmospheric Composition and Structure, Middle atmosphere, constituent transport and chemistry, Atmospheric Composition and Structure, Middle atmosphere, composition and chemistry, Atmospheric Processes, Middle atmosphere dynamics (0341, 0342), QBO-annual beat, Brewer-Dobson circulation, stratospheric ozone |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
|