Gravity waves observed in temperature, wind and ozone data over Macquarie Island
Characteristics of inertia-gravity waves are analysed in highresolution vertical profiles of temperature, winds and ozone collected at Macquarie Island (54°S, 159°E) during the Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects of Stratospheric Aircraft (ASHOE/MAESA...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.222.7266 2023-05-15T17:09:54+02:00 Gravity waves observed in temperature, wind and ozone data over Macquarie Island Fabrice Chane-ming Fiona Guest David J. Karoly The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.7266 http://www.bom.gov.au/amm/docs/2003/chaneming.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.7266 http://www.bom.gov.au/amm/docs/2003/chaneming.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.bom.gov.au/amm/docs/2003/chaneming.pdf text 2001 ftciteseerx 2022-01-30T01:24:43Z Characteristics of inertia-gravity waves are analysed in highresolution vertical profiles of temperature, winds and ozone collected at Macquarie Island (54°S, 159°E) during the Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects of Stratospheric Aircraft (ASHOE/MAESA) observation programme in 1994. Two particular techniques are outlined to identify gravity-wave modes. The first is based on the continuous wavelet transform and seeks altitudes where the atmospheric fluctuations satisfy the gravity-wave polarisation relations in the temperature and wind soundings. The second analyses the phase and amplitude relationship of small-scale wavelike signatures seen in temperature and ozone profiles. The wavelet method identified gravity-wave modes with vertical wavelengths of 1-10 km, horizontal wavelengths of 50-1000 km and intrinsic frequencies of 1-2 f. Both methods reveal the presence of dominant modes with vertical wavelength <4 km in the upper troposphere and lower stratosphere over Macquarie Island. The energy activity of observed modes agrees well with the seasonal cycle of the upper level jet at 10 km height. These techniques together with classical spectral methods are applied to the case study of 25 October 1994 for which three quasimonochromatic coherent modes with upwardly propagating wave energy are detected in the lower stratosphere. Text Macquarie Island Unknown |
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English |
description |
Characteristics of inertia-gravity waves are analysed in highresolution vertical profiles of temperature, winds and ozone collected at Macquarie Island (54°S, 159°E) during the Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects of Stratospheric Aircraft (ASHOE/MAESA) observation programme in 1994. Two particular techniques are outlined to identify gravity-wave modes. The first is based on the continuous wavelet transform and seeks altitudes where the atmospheric fluctuations satisfy the gravity-wave polarisation relations in the temperature and wind soundings. The second analyses the phase and amplitude relationship of small-scale wavelike signatures seen in temperature and ozone profiles. The wavelet method identified gravity-wave modes with vertical wavelengths of 1-10 km, horizontal wavelengths of 50-1000 km and intrinsic frequencies of 1-2 f. Both methods reveal the presence of dominant modes with vertical wavelength <4 km in the upper troposphere and lower stratosphere over Macquarie Island. The energy activity of observed modes agrees well with the seasonal cycle of the upper level jet at 10 km height. These techniques together with classical spectral methods are applied to the case study of 25 October 1994 for which three quasimonochromatic coherent modes with upwardly propagating wave energy are detected in the lower stratosphere. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Fabrice Chane-ming Fiona Guest David J. Karoly |
spellingShingle |
Fabrice Chane-ming Fiona Guest David J. Karoly Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
author_facet |
Fabrice Chane-ming Fiona Guest David J. Karoly |
author_sort |
Fabrice Chane-ming |
title |
Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
title_short |
Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
title_full |
Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
title_fullStr |
Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
title_full_unstemmed |
Gravity waves observed in temperature, wind and ozone data over Macquarie Island |
title_sort |
gravity waves observed in temperature, wind and ozone data over macquarie island |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.7266 http://www.bom.gov.au/amm/docs/2003/chaneming.pdf |
genre |
Macquarie Island |
genre_facet |
Macquarie Island |
op_source |
http://www.bom.gov.au/amm/docs/2003/chaneming.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.7266 http://www.bom.gov.au/amm/docs/2003/chaneming.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766066269287612416 |