Short-period mesospheric gravity waves and their sources at the South Pole
The sourcing locations and mechanisms for short-period, upward-propagating gravity waves at high polar latitudes remain largely unknown. Using all-sky imager data from the Amundsen–Scott South Pole Station, we determine the spatial and temporal characteristics of 94 observed small-scale waves in 3 a...
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Online Access: | http://hdl.handle.net/2433/218741 |
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ftkyotouniv:oai:repository.kulib.kyoto-u.ac.jp:2433/218741 2023-05-15T13:24:26+02:00 Short-period mesospheric gravity waves and their sources at the South Pole Mehta, Dhvanit Gerrard, Andrew J. Ebihara, Yusuke Weatherwax, Allan T. Lanzerotti, Louis J. 海老原, 祐輔 2017-01-20 application/pdf http://hdl.handle.net/2433/218741 eng eng European Geosciences Union (EGU) 10.5194/acp-17-911-2017 1680-7324 http://hdl.handle.net/2433/218741 Atmospheric Chemistry and Physics 17 2 911 919 © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY Journal Article 2017 ftkyotouniv 2017-10-28T23:00:08Z The sourcing locations and mechanisms for short-period, upward-propagating gravity waves at high polar latitudes remain largely unknown. Using all-sky imager data from the Amundsen–Scott South Pole Station, we determine the spatial and temporal characteristics of 94 observed small-scale waves in 3 austral winter months in 2003 and 2004. These data, together with background atmospheres from synoptic and/or climatological empirical models, are used to model gravity wave propagation from the polar mesosphere to each wave's source using a ray-tracing model. Our results provide a compelling case that a significant proportion of the observed waves are launched in several discrete layers in the tropopause and/or stratosphere. Analyses of synoptic geopotentials and temperatures indicate that wave formation is a result of baroclinic instability processes in the stratosphere and the interaction of planetary waves with the background wind fields in the tropopause. These results are significant for defining the influences of the polar vortex on the production of these small-scale, upward-propagating gravity waves at the highest polar latitudes. Article in Journal/Newspaper Amundsen-Scott South pole Kyoto University Research Information Repository (KURENAI) 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 |
Kyoto University Research Information Repository (KURENAI) |
op_collection_id |
ftkyotouniv |
language |
English |
description |
The sourcing locations and mechanisms for short-period, upward-propagating gravity waves at high polar latitudes remain largely unknown. Using all-sky imager data from the Amundsen–Scott South Pole Station, we determine the spatial and temporal characteristics of 94 observed small-scale waves in 3 austral winter months in 2003 and 2004. These data, together with background atmospheres from synoptic and/or climatological empirical models, are used to model gravity wave propagation from the polar mesosphere to each wave's source using a ray-tracing model. Our results provide a compelling case that a significant proportion of the observed waves are launched in several discrete layers in the tropopause and/or stratosphere. Analyses of synoptic geopotentials and temperatures indicate that wave formation is a result of baroclinic instability processes in the stratosphere and the interaction of planetary waves with the background wind fields in the tropopause. These results are significant for defining the influences of the polar vortex on the production of these small-scale, upward-propagating gravity waves at the highest polar latitudes. |
author2 |
海老原, 祐輔 |
format |
Article in Journal/Newspaper |
author |
Mehta, Dhvanit Gerrard, Andrew J. Ebihara, Yusuke Weatherwax, Allan T. Lanzerotti, Louis J. |
spellingShingle |
Mehta, Dhvanit Gerrard, Andrew J. Ebihara, Yusuke Weatherwax, Allan T. Lanzerotti, Louis J. Short-period mesospheric gravity waves and their sources at the South Pole |
author_facet |
Mehta, Dhvanit Gerrard, Andrew J. Ebihara, Yusuke Weatherwax, Allan T. Lanzerotti, Louis J. |
author_sort |
Mehta, Dhvanit |
title |
Short-period mesospheric gravity waves and their sources at the South Pole |
title_short |
Short-period mesospheric gravity waves and their sources at the South Pole |
title_full |
Short-period mesospheric gravity waves and their sources at the South Pole |
title_fullStr |
Short-period mesospheric gravity waves and their sources at the South Pole |
title_full_unstemmed |
Short-period mesospheric gravity waves and their sources at the South Pole |
title_sort |
short-period mesospheric gravity waves and their sources at the south pole |
publisher |
European Geosciences Union (EGU) |
publishDate |
2017 |
url |
http://hdl.handle.net/2433/218741 |
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 South pole |
genre_facet |
Amundsen-Scott South pole |
op_relation |
10.5194/acp-17-911-2017 1680-7324 http://hdl.handle.net/2433/218741 Atmospheric Chemistry and Physics 17 2 911 919 |
op_rights |
© Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
_version_ |
1766379671252893696 |