Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S)
Since 2010, Utah State University has operated an infrared Advanced Mesospheric Temperature Mapper at the Amundsen–Scott South Pole station to investigate the upper atmosphere dynamics and temperature deep within the vortex. A surprising number of “frontal” gravity wave events (86) were recorded in...
Published in: | Journal of Geophysical Research: Atmospheres |
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ftembryriddleaun:oai:commons.erau.edu:publication-1794 2023-10-01T03:50:11+02:00 Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) Pautet, P.-D. Taylor, M. J. Snively, J. B. Solorio, C. 1670664 2018-01-09T08:00:00Z application/pdf https://commons.erau.edu/publication/703 https://doi.org/10.1002/2017JD027046 https://commons.erau.edu/context/publication/article/1794/viewcontent/Pautet_et_al_2018_Journal_of_Geophysical_Research__Atmospheres.pdf unknown Scholarly Commons https://commons.erau.edu/publication/703 doi:10.1002/2017JD027046 https://commons.erau.edu/context/publication/article/1794/viewcontent/Pautet_et_al_2018_Journal_of_Geophysical_Research__Atmospheres.pdf Publications gravity waves MLT (mesosphere and lower thermosphere) ANGWIN ( Antarctic Gravity Wave Instrument Network) South Pole Astrophysics and Astronomy Cosmology Relativity and Gravity text 2018 ftembryriddleaun https://doi.org/10.1002/2017JD027046 2023-09-02T19:05:51Z Since 2010, Utah State University has operated an infrared Advanced Mesospheric Temperature Mapper at the Amundsen–Scott South Pole station to investigate the upper atmosphere dynamics and temperature deep within the vortex. A surprising number of “frontal” gravity wave events (86) were recorded in the mesospheric OH(3,1) band intensity and rotational temperature images (typical altitude of ~87 km) during four austral winters (2012–2015). These events are gravity waves (GWs) characterized by a sharp leading wave front followed by a quasi-monochromatic wave train that grows with time. A particular subset of frontal gravity wave events has been identified in the past (Dewan & Picard, 1998) as “bores.” These are usually associated with wave ducting within stable mesospheric inversion layers, which allow them to propagate over very large distances. They have been observed on numerous occasions from low-latitude and midlatitude sites, but to date, very few have been reported at high latitudes. This study provides new analyses of the characteristics of frontal events at high latitudes and shows that most of them are likely ducted. The occurrence of these frontal GW events over this isolated region strongly supports the existence of horizontally extensive mesospheric thermal inversion layers over Antarctica, leading to regions of enhanced stability necessary for GW trapping and ducting. Text Amundsen-Scott Antarc* Antarctic Antarctica South pole South pole Embry-Riddle Aeronautical University: ERAU Scholarly Commons Antarctic Austral South Pole Amundsen-Scott ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen Scott South Pole Station ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen-Scott South Pole Station ENVELOPE(139.273,139.273,-89.998,-89.998) Journal of Geophysical Research: Atmospheres 123 1 160 173 |
institution |
Open Polar |
collection |
Embry-Riddle Aeronautical University: ERAU Scholarly Commons |
op_collection_id |
ftembryriddleaun |
language |
unknown |
topic |
gravity waves MLT (mesosphere and lower thermosphere) ANGWIN ( Antarctic Gravity Wave Instrument Network) South Pole Astrophysics and Astronomy Cosmology Relativity and Gravity |
spellingShingle |
gravity waves MLT (mesosphere and lower thermosphere) ANGWIN ( Antarctic Gravity Wave Instrument Network) South Pole Astrophysics and Astronomy Cosmology Relativity and Gravity Pautet, P.-D. Taylor, M. J. Snively, J. B. Solorio, C. Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
topic_facet |
gravity waves MLT (mesosphere and lower thermosphere) ANGWIN ( Antarctic Gravity Wave Instrument Network) South Pole Astrophysics and Astronomy Cosmology Relativity and Gravity |
description |
Since 2010, Utah State University has operated an infrared Advanced Mesospheric Temperature Mapper at the Amundsen–Scott South Pole station to investigate the upper atmosphere dynamics and temperature deep within the vortex. A surprising number of “frontal” gravity wave events (86) were recorded in the mesospheric OH(3,1) band intensity and rotational temperature images (typical altitude of ~87 km) during four austral winters (2012–2015). These events are gravity waves (GWs) characterized by a sharp leading wave front followed by a quasi-monochromatic wave train that grows with time. A particular subset of frontal gravity wave events has been identified in the past (Dewan & Picard, 1998) as “bores.” These are usually associated with wave ducting within stable mesospheric inversion layers, which allow them to propagate over very large distances. They have been observed on numerous occasions from low-latitude and midlatitude sites, but to date, very few have been reported at high latitudes. This study provides new analyses of the characteristics of frontal events at high latitudes and shows that most of them are likely ducted. The occurrence of these frontal GW events over this isolated region strongly supports the existence of horizontally extensive mesospheric thermal inversion layers over Antarctica, leading to regions of enhanced stability necessary for GW trapping and ducting. |
author2 |
1670664 |
format |
Text |
author |
Pautet, P.-D. Taylor, M. J. Snively, J. B. Solorio, C. |
author_facet |
Pautet, P.-D. Taylor, M. J. Snively, J. B. Solorio, C. |
author_sort |
Pautet, P.-D. |
title |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
title_short |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
title_full |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
title_fullStr |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
title_full_unstemmed |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over the South Pole (90 degrees S) |
title_sort |
unexpected occurrence of mesospheric frontal gravity wave events over the south pole (90 degrees s) |
publisher |
Scholarly Commons |
publishDate |
2018 |
url |
https://commons.erau.edu/publication/703 https://doi.org/10.1002/2017JD027046 https://commons.erau.edu/context/publication/article/1794/viewcontent/Pautet_et_al_2018_Journal_of_Geophysical_Research__Atmospheres.pdf |
long_lat |
ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(139.273,139.273,-89.998,-89.998) |
geographic |
Antarctic Austral South Pole Amundsen-Scott Amundsen Scott South Pole Station Amundsen-Scott South Pole Station |
geographic_facet |
Antarctic Austral South Pole Amundsen-Scott Amundsen Scott South Pole Station Amundsen-Scott South Pole Station |
genre |
Amundsen-Scott Antarc* Antarctic Antarctica South pole South pole |
genre_facet |
Amundsen-Scott Antarc* Antarctic Antarctica South pole South pole |
op_source |
Publications |
op_relation |
https://commons.erau.edu/publication/703 doi:10.1002/2017JD027046 https://commons.erau.edu/context/publication/article/1794/viewcontent/Pautet_et_al_2018_Journal_of_Geophysical_Research__Atmospheres.pdf |
op_doi |
https://doi.org/10.1002/2017JD027046 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
1 |
container_start_page |
160 |
op_container_end_page |
173 |
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1778519745995210752 |