Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements
International audience 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),...
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Language: | English |
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Online Access: | https://hal.science/hal-00961525 https://hal.science/hal-00961525/document https://hal.science/hal-00961525/file/Mbatha%20et%20al,%20ACP%202010_hal.pdf https://doi.org/10.5194/acp-10-3397-2010 |
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ftunivreunion:oai:HAL:hal-00961525v1 2024-05-19T07:30:59+00:00 Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements Mbatha, Nkanyiso Sivakumar, Venkataraman Malinga, Sandile B. Bencherif, Hassan Pillay, S. R. Hermanus Magnetic Observatory University of KwaZulu-Natal Durban, Afrique du Sud (UKZN) National Laser Centre Pretoria (NLC) Council for Scientific and Industrial Research Pretoria (CSIR) Department of Geography, Geoinformatics and Meteorology Pretoria University of Pretoria South Africa Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France 2010 https://hal.science/hal-00961525 https://hal.science/hal-00961525/document https://hal.science/hal-00961525/file/Mbatha%20et%20al,%20ACP%202010_hal.pdf https://doi.org/10.5194/acp-10-3397-2010 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-10-3397-2010 hal-00961525 https://hal.science/hal-00961525 https://hal.science/hal-00961525/document https://hal.science/hal-00961525/file/Mbatha%20et%20al,%20ACP%202010_hal.pdf doi:10.5194/acp-10-3397-2010 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00961525 Atmospheric Chemistry and Physics, 2010, 10 (7), pp.3397--3404. ⟨10.5194/acp-10-3397-2010⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2010 ftunivreunion https://doi.org/10.5194/acp-10-3397-2010 2024-04-24T23:52:54Z International audience 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 andzonal 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 Université de la Réunion: HAL Atmospheric Chemistry and Physics 10 7 3397 3404 |
institution |
Open Polar |
collection |
Université de la Réunion: HAL |
op_collection_id |
ftunivreunion |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Mbatha, Nkanyiso Sivakumar, Venkataraman Malinga, Sandile B. Bencherif, Hassan Pillay, S. R. Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience 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 andzonal 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. |
author2 |
Hermanus Magnetic Observatory University of KwaZulu-Natal Durban, Afrique du Sud (UKZN) National Laser Centre Pretoria (NLC) Council for Scientific and Industrial Research Pretoria (CSIR) Department of Geography, Geoinformatics and Meteorology Pretoria University of Pretoria South Africa Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France |
format |
Article in Journal/Newspaper |
author |
Mbatha, Nkanyiso Sivakumar, Venkataraman Malinga, Sandile B. Bencherif, Hassan Pillay, S. R. |
author_facet |
Mbatha, Nkanyiso Sivakumar, Venkataraman Malinga, Sandile B. Bencherif, Hassan Pillay, S. R. |
author_sort |
Mbatha, Nkanyiso |
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 |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00961525 https://hal.science/hal-00961525/document https://hal.science/hal-00961525/file/Mbatha%20et%20al,%20ACP%202010_hal.pdf https://doi.org/10.5194/acp-10-3397-2010 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00961525 Atmospheric Chemistry and Physics, 2010, 10 (7), pp.3397--3404. ⟨10.5194/acp-10-3397-2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-10-3397-2010 hal-00961525 https://hal.science/hal-00961525 https://hal.science/hal-00961525/document https://hal.science/hal-00961525/file/Mbatha%20et%20al,%20ACP%202010_hal.pdf doi:10.5194/acp-10-3397-2010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
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 |
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1799468832826327040 |