The observed zonal wind cycle in the southern hemisphere stratosphere
Abstract Zonal winds in the stratosphere for a period of 20 years have been analysed at nine stations between 7°S and 66°S centred on the longitude of eastern Australia. The amplitude, period and phase of the third (‘quasi‐biennial’) cycle are determined. Although a coherent pattern emerges in the v...
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crwiley:10.1002/qj.49710544317 2024-06-02T08:13:30+00:00 The observed zonal wind cycle in the southern hemisphere stratosphere Tucker, G. B. 1979 http://dx.doi.org/10.1002/qj.49710544317 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.49710544317 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.49710544317 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 105, issue 443, page 263-273 ISSN 0035-9009 1477-870X journal-article 1979 crwiley https://doi.org/10.1002/qj.49710544317 2024-05-03T11:52:46Z Abstract Zonal winds in the stratosphere for a period of 20 years have been analysed at nine stations between 7°S and 66°S centred on the longitude of eastern Australia. The amplitude, period and phase of the third (‘quasi‐biennial’) cycle are determined. Although a coherent pattern emerges in the variation of period with latitude and height it is concluded that, at least in the tropics, the representative period is 832 days (27.35 months). The well‐known maximum in amplitude of this third cycle in the tropics decreases to a minimum at about 30°S but increases again polewards, reaching a maximum at about 50°S at the highest levels of observation (6mb). The phase of the cycle ‘leads’ at high levels and low latitudes and also at the height and latitude of the polar night jet. Below these maxima there is a downward propagation of the cycle but little phase variation with height exists in middle latitudes. For the tropics, the variation with latitude of amplitude and phase is consistent with lateral diffusion of a forced equatorial cycle, with eddy diffusion coefficients of 1 × 10 9 cm 2 s −1 at 80mb, decreasing to 3 × 10 8 cm 2 s −1 at 25mb. Article in Journal/Newspaper polar night Wiley Online Library Quarterly Journal of the Royal Meteorological Society 105 443 263 273 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Zonal winds in the stratosphere for a period of 20 years have been analysed at nine stations between 7°S and 66°S centred on the longitude of eastern Australia. The amplitude, period and phase of the third (‘quasi‐biennial’) cycle are determined. Although a coherent pattern emerges in the variation of period with latitude and height it is concluded that, at least in the tropics, the representative period is 832 days (27.35 months). The well‐known maximum in amplitude of this third cycle in the tropics decreases to a minimum at about 30°S but increases again polewards, reaching a maximum at about 50°S at the highest levels of observation (6mb). The phase of the cycle ‘leads’ at high levels and low latitudes and also at the height and latitude of the polar night jet. Below these maxima there is a downward propagation of the cycle but little phase variation with height exists in middle latitudes. For the tropics, the variation with latitude of amplitude and phase is consistent with lateral diffusion of a forced equatorial cycle, with eddy diffusion coefficients of 1 × 10 9 cm 2 s −1 at 80mb, decreasing to 3 × 10 8 cm 2 s −1 at 25mb. |
format |
Article in Journal/Newspaper |
author |
Tucker, G. B. |
spellingShingle |
Tucker, G. B. The observed zonal wind cycle in the southern hemisphere stratosphere |
author_facet |
Tucker, G. B. |
author_sort |
Tucker, G. B. |
title |
The observed zonal wind cycle in the southern hemisphere stratosphere |
title_short |
The observed zonal wind cycle in the southern hemisphere stratosphere |
title_full |
The observed zonal wind cycle in the southern hemisphere stratosphere |
title_fullStr |
The observed zonal wind cycle in the southern hemisphere stratosphere |
title_full_unstemmed |
The observed zonal wind cycle in the southern hemisphere stratosphere |
title_sort |
observed zonal wind cycle in the southern hemisphere stratosphere |
publisher |
Wiley |
publishDate |
1979 |
url |
http://dx.doi.org/10.1002/qj.49710544317 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.49710544317 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.49710544317 |
genre |
polar night |
genre_facet |
polar night |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 105, issue 443, page 263-273 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.49710544317 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
105 |
container_issue |
443 |
container_start_page |
263 |
op_container_end_page |
273 |
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1800737036669288448 |