Physics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006acpd....611299h&link_type=abstract
Atmospheric Chemistry and Physics Discussions, Volume 6, Issue 6, 2006, pp.11299-11316
Physics
2
Scientific paper
The upwelling planetary wave activity (PW) from the troposphere controls the intensity of the equator to pole transport of stratospheric ozone by the Brewer-Dobson circulation and thereby modulates the total ozone content at mid- and high-latitudes. Rayleigh lidar temperature data obtained from 1981 to 2001 at mid-latitude were used to study the interannual variability of PW activity in winter (October to April). The spectrum of stratospheric temperature fluctuations exhibits 2 peaks corresponding to 2 dominant modes of free travelling Rossby waves known as 16 day- and 12 day-waves. The 12 day-wave activity is shown to be anticorrelated with the equatorial QBO wind at 40 hPa. During the period 1981-2000 the global PW activity shows a negative trend for months October to January and a positive trend in March and April.
Chanin Marie-Lise
Hauchecorne Alain
Keckhut Philippe
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