Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements
The occurrence of a sudden stratospheric warming (SSW) excites disturbances in the mesosphere-lower thermospheric (MLT) wind and temperature. Here, we have examined the high frequency (HF) radar wind data from the South African National Antarctic Expedition, SANAE (72° S, 3° W), a radar which is par...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2010
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-10-3397-2010 https://doaj.org/article/8182fddef28f4e87939671249707788f |
id |
ftdoajarticles:oai:doaj.org/article:8182fddef28f4e87939671249707788f |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:8182fddef28f4e87939671249707788f 2023-05-15T13:58:42+02:00 Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements N. Mbatha V. Sivakumar S. B. Malinga H. Bencherif S. R. Pillay 2010-04-01T00:00:00Z https://doi.org/10.5194/acp-10-3397-2010 https://doaj.org/article/8182fddef28f4e87939671249707788f EN eng Copernicus Publications http://www.atmos-chem-phys.net/10/3397/2010/acp-10-3397-2010.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-10-3397-2010 1680-7316 1680-7324 https://doaj.org/article/8182fddef28f4e87939671249707788f Atmospheric Chemistry and Physics, Vol 10, Iss 7, Pp 3397-3404 (2010) Physics QC1-999 Chemistry QD1-999 article 2010 ftdoajarticles https://doi.org/10.5194/acp-10-3397-2010 2022-12-31T13:50:53Z The occurrence of a sudden stratospheric warming (SSW) excites disturbances in the mesosphere-lower thermospheric (MLT) wind and temperature. Here, we have examined the high frequency (HF) radar wind data from the South African National Antarctic Expedition, SANAE (72° S, 3° W), a radar which is part of the Super Dual Auroral Radar Network (SuperDARN). Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) on board the Thermosphere-Ionosphere-Mesosphere-Energetics and Dynamics (TIMED) satellite temperature data and National Centre for Environmental Prediction (NCEP) temperature and wind data are used to investigate the dynamical effects of the unprecedented September 2002 SSW in the Antarctica stratosphere and MLT. The mean zonal wind (from SANAE HF radar) at the MLT shows reversal approximately 7 days before the reversal at 10 hPa (from NCEP). This indicates that there was a downwards propagation of circulation disturbance. Westerly zonal winds dominate the winter MLT, but during the 2002 winter there are many periods of westward winds observed compared to other years. The normalised power spectrums of both meridional and zonal winds show presence of planetary waves (of ~14-day period) before the occurrence of the SSW. The SABER vertical temperature profiles indicated the cooling of the MLT region before the SSW event. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic SANAE ENVELOPE(-2.850,-2.850,-71.667,-71.667) Atmospheric Chemistry and Physics 10 7 3397 3404 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 N. Mbatha V. Sivakumar S. B. Malinga H. Bencherif S. R. Pillay Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The occurrence of a sudden stratospheric warming (SSW) excites disturbances in the mesosphere-lower thermospheric (MLT) wind and temperature. Here, we have examined the high frequency (HF) radar wind data from the South African National Antarctic Expedition, SANAE (72° S, 3° W), a radar which is part of the Super Dual Auroral Radar Network (SuperDARN). Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) on board the Thermosphere-Ionosphere-Mesosphere-Energetics and Dynamics (TIMED) satellite temperature data and National Centre for Environmental Prediction (NCEP) temperature and wind data are used to investigate the dynamical effects of the unprecedented September 2002 SSW in the Antarctica stratosphere and MLT. The mean zonal wind (from SANAE HF radar) at the MLT shows reversal approximately 7 days before the reversal at 10 hPa (from NCEP). This indicates that there was a downwards propagation of circulation disturbance. Westerly zonal winds dominate the winter MLT, but during the 2002 winter there are many periods of westward winds observed compared to other years. The normalised power spectrums of both meridional and zonal winds show presence of planetary waves (of ~14-day period) before the occurrence of the SSW. The SABER vertical temperature profiles indicated the cooling of the MLT region before the SSW event. |
format |
Article in Journal/Newspaper |
author |
N. Mbatha V. Sivakumar S. B. Malinga H. Bencherif S. R. Pillay |
author_facet |
N. Mbatha V. Sivakumar S. B. Malinga H. Bencherif S. R. Pillay |
author_sort |
N. Mbatha |
title |
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
title_short |
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
title_full |
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
title_fullStr |
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
title_full_unstemmed |
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
title_sort |
study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and hf radar measurements |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/acp-10-3397-2010 https://doaj.org/article/8182fddef28f4e87939671249707788f |
long_lat |
ENVELOPE(-2.850,-2.850,-71.667,-71.667) |
geographic |
Antarctic SANAE |
geographic_facet |
Antarctic SANAE |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Atmospheric Chemistry and Physics, Vol 10, Iss 7, Pp 3397-3404 (2010) |
op_relation |
http://www.atmos-chem-phys.net/10/3397/2010/acp-10-3397-2010.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-10-3397-2010 1680-7316 1680-7324 https://doaj.org/article/8182fddef28f4e87939671249707788f |
op_doi |
https://doi.org/10.5194/acp-10-3397-2010 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
10 |
container_issue |
7 |
container_start_page |
3397 |
op_container_end_page |
3404 |
_version_ |
1766267054764064768 |