The Quasi-biennial Oscillation and annual variations in tropical ozone from SHADOZ and HALOE

J. C. Witte, M. R. Schoeberl, A. R. Douglass, A. M. Thompson

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We examine the tropical ozone mixing ratio perturbation fields generated from a monthly ozone climatology using 1998 to 2006 ozonesonde data from the Southern Hemisphere Additional Ozonesondes (SHADOZ) network and the 13-year satellite record from 1993 to 2005 obtained from the Halogen Occultation Experiment (HALOE). The long time series and high vertical resolution of the ozone and temperature profiles from the SHADOZ sondes coupled with good tropical coverage north and south of the equator gives a detailed picture of the ozone structure in the lowermost stratosphere down through the tropopause where the picture obtained from HALOE measurements is blurred by coarse vertical resolution. Ozone perturbations respond to annual variations in the Brewer-Dobson Circulation (BDC) in the region just above the cold-point tropopause to around 20 km. Annual cycles in ozone and temperature are well correlated. Above 20 km, ozone and temperature perturbations are dominated by the Quasi-biennial Oscillation (QBO). Both satellite and sonde records show good agreement between positive and negative ozone mixing ratio anomalies and alternating QBO westerly and easterly wind shears from the Singapore rawinsondes with a mean periodicity of 26 months for SHADOZ and 25 months for HALOE. There is a temporal offset of one to three months with the QBO wind shear ahead of the ozone anomaly field. The meridional length scales for the annual cycle and the QBO, obtained using the temperature anomalies and wind shears in the thermal wind equation, compare well with theoretical calculations.

Original languageEnglish (US)
Pages (from-to)3929-3936
Number of pages8
JournalAtmospheric Chemistry and Physics
Volume8
Issue number14
DOIs
StatePublished - Jul 16 2008

Fingerprint

ozonesonde
quasi-biennial oscillation
halogen
annual variation
Southern Hemisphere
ozone
experiment
wind shear
perturbation
tropopause
annual cycle
mixing ratio
anomaly
westerly
temperature profile
temperature anomaly
climatology
periodicity
stratosphere
temperature

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Witte, J. C. ; Schoeberl, M. R. ; Douglass, A. R. ; Thompson, A. M. / The Quasi-biennial Oscillation and annual variations in tropical ozone from SHADOZ and HALOE. In: Atmospheric Chemistry and Physics. 2008 ; Vol. 8, No. 14. pp. 3929-3936.
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The Quasi-biennial Oscillation and annual variations in tropical ozone from SHADOZ and HALOE. / Witte, J. C.; Schoeberl, M. R.; Douglass, A. R.; Thompson, A. M.

In: Atmospheric Chemistry and Physics, Vol. 8, No. 14, 16.07.2008, p. 3929-3936.

Research output: Contribution to journalArticle

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