Details

Autor(en) / Beteiligte

• Farrara, John D.
• Fisher, Michael
• Mechoso, Carlos R.
• O'Neill, Alan

Titel

Planetary-scale disturbances in the southern stratosphere during early winter

Ist Teil von

• Journal of the atmospheric sciences, 1992-09, Vol.49 (18 S), p.1757-1775

Ort / Verlag

Legacy CDMS: American Meteorological Society

Erscheinungsjahr

1992

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The stratospheric circulation and planetary-scale dusturbances during early-winter (mid-April to mid-July) in the Southern Hemisphere are investigated using observational data collected for the 1979-1990 period, and a 3D primitive equation model of the stratosphere and mesosphere. It was found that there were six extended periods in the data set when wave 1 (which is usually quasi-stationary) traveled steadily eastward and had large amplitude. Results of simulations suggest that the development of the South Pacific warmings is connected with the amplification of wave 1 at 100 mb. The results also indicate that the development of stratospheric disturbances in the southern stratosphere during early winter depends more on the intensity of wave 1 at 100 mb than on the structure of the zonal-mean flow in the stratosphere.