Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°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...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | unknown |
Published: |
Hosted by Utah State University Libraries
2018
|
Subjects: | |
Online Access: | https://digitalcommons.usu.edu/ail_pubs/26 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1053&context=ail_pubs |
id |
ftutahsudc:oai:digitalcommons.usu.edu:ail_pubs-1053 |
---|---|
record_format |
openpolar |
spelling |
ftutahsudc:oai:digitalcommons.usu.edu:ail_pubs-1053 2023-05-15T13:24:27+02:00 Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) Pautet, Pierre-Dominique Taylor, Michael J. Snively, J. B. Solorio, Christina American Geophysical Union 2018-01-09T08:00:00Z application/pdf https://digitalcommons.usu.edu/ail_pubs/26 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1053&context=ail_pubs unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/ail_pubs/26 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1053&context=ail_pubs Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. PDM Publications Atmospheric Sciences Physics text 2018 ftutahsudc 2022-03-07T21:41:49Z 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* Antarctica South pole South pole Utah State University: DigitalCommons@USU Amundsen Scott South Pole Station ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen-Scott ENVELOPE(0.000,0.000,-90.000,-90.000) Amundsen-Scott South Pole Station ENVELOPE(139.273,139.273,-89.998,-89.998) Austral South Pole |
institution |
Open Polar |
collection |
Utah State University: DigitalCommons@USU |
op_collection_id |
ftutahsudc |
language |
unknown |
topic |
Atmospheric Sciences Physics |
spellingShingle |
Atmospheric Sciences Physics Pautet, Pierre-Dominique Taylor, Michael J. Snively, J. B. Solorio, Christina Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
topic_facet |
Atmospheric Sciences Physics |
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 |
American Geophysical Union |
format |
Text |
author |
Pautet, Pierre-Dominique Taylor, Michael J. Snively, J. B. Solorio, Christina |
author_facet |
Pautet, Pierre-Dominique Taylor, Michael J. Snively, J. B. Solorio, Christina |
author_sort |
Pautet, Pierre-Dominique |
title |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
title_short |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
title_full |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
title_fullStr |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
title_full_unstemmed |
Unexpected Occurrence of Mesospheric Frontal Gravity Wave Events Over South Pole (90°S) |
title_sort |
unexpected occurrence of mesospheric frontal gravity wave events over south pole (90°s) |
publisher |
Hosted by Utah State University Libraries |
publishDate |
2018 |
url |
https://digitalcommons.usu.edu/ail_pubs/26 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1053&context=ail_pubs |
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 |
Amundsen Scott South Pole Station Amundsen-Scott Amundsen-Scott South Pole Station Austral South Pole |
geographic_facet |
Amundsen Scott South Pole Station Amundsen-Scott Amundsen-Scott South Pole Station Austral South Pole |
genre |
Amundsen-Scott Antarc* Antarctica South pole South pole |
genre_facet |
Amundsen-Scott Antarc* Antarctica South pole South pole |
op_source |
Publications |
op_relation |
https://digitalcommons.usu.edu/ail_pubs/26 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1053&context=ail_pubs |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
op_rightsnorm |
PDM |
_version_ |
1766379753095299072 |