Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources
Gravity wave (GW) activities in the upper mesosphere (80–100 km) and their potential sources are investigated using meteor radar observations at King Sejong Station, Antarctica (KSS; 62.22°S, 58.78°W) during recent 14 years (2007–2020). GW activities are estimated by horizontal wind variances of sma...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://researchportal.bath.ac.uk/en/publications/88022f7f-057e-4761-b748-9a553f4a1c7f https://doi.org/10.1029/2021JD034528 https://purehost.bath.ac.uk/ws/files/287682891/JGR_Atmospheres_2021_Song_Activities_of_Small_Scale_Gravity_Waves_in_the_Upper_Mesosphere_Observed_From_Meteor_Radar.pdf http://www.scopus.com/inward/record.url?scp=85106686564&partnerID=8YFLogxK |
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ftunivbathcris:oai:purehost.bath.ac.uk:publications/88022f7f-057e-4761-b748-9a553f4a1c7f 2024-09-15T17:48:37+00:00 Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources Song, B. G. Song, I. S. Chun, H. Y. Lee, C. Kam, H. Kim, Y. H. Kang, M. J. Hindley, N. P. Mitchell, N. J. 2021-05-27 application/pdf https://researchportal.bath.ac.uk/en/publications/88022f7f-057e-4761-b748-9a553f4a1c7f https://doi.org/10.1029/2021JD034528 https://purehost.bath.ac.uk/ws/files/287682891/JGR_Atmospheres_2021_Song_Activities_of_Small_Scale_Gravity_Waves_in_the_Upper_Mesosphere_Observed_From_Meteor_Radar.pdf http://www.scopus.com/inward/record.url?scp=85106686564&partnerID=8YFLogxK eng eng https://researchportal.bath.ac.uk/en/publications/88022f7f-057e-4761-b748-9a553f4a1c7f info:eu-repo/semantics/openAccess Song , B G , Song , I S , Chun , H Y , Lee , C , Kam , H , Kim , Y H , Kang , M J , Hindley , N P & Mitchell , N J 2021 , ' Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources ' , Journal of Geophysical Research: Atmospheres , vol. 126 , no. 10 , e2021JD034528 . https://doi.org/10.1029/2021JD034528 Antarctica gravity waves meteor radar MLT upper mesosphere /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1901 name=Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science article 2021 ftunivbathcris https://doi.org/10.1029/2021JD034528 2024-08-28T23:48:48Z Gravity wave (GW) activities in the upper mesosphere (80–100 km) and their potential sources are investigated using meteor radar observations at King Sejong Station, Antarctica (KSS; 62.22°S, 58.78°W) during recent 14 years (2007–2020). GW activities are estimated by horizontal wind variances of small-scale GWs (periods <2 h, horizontal wavelength <400 km, or vertical wavelength <3–5 km). The wind variances show clear semiannual variations with maxima at solstices, and annual variations are also seen above z = 90 km. The deseasonalized wind variances at z = 96.8 km have a statistically significant periodicity of ∼11 years that can be associated with solar cycle variations. Three major potential GW sources in the lower atmosphere are examined. Orography is a potential source of GWs in winter and autumn, when the basic-state wind is westerly from the surface up to the mesosphere. The residual of the nonlinear balance equation (RNBE) at 5 hPa, a diagnostic of the GWs associated with jet stream, is the largest in winter and has a secondary maximum in spring. The correlation between the observed GWs and RNBE is significant in equinoxes, while correlation is low in winter. Deep convection in storm tracks is a potential source in autumn and winter. Secondary GWs generated in the mesosphere can also be observed in the upper mesosphere. Ray-tracing analysis for airglow images observed at KSS indicates that secondary GWs are mostly generated in winter mesosphere, which may be associated with the breaking of orographic GWs. Article in Journal/Newspaper Antarc* Antarctica University of Bath's research portal Journal of Geophysical Research: Atmospheres 126 10 |
institution |
Open Polar |
collection |
University of Bath's research portal |
op_collection_id |
ftunivbathcris |
language |
English |
topic |
Antarctica gravity waves meteor radar MLT upper mesosphere /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1901 name=Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science |
spellingShingle |
Antarctica gravity waves meteor radar MLT upper mesosphere /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1901 name=Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science Song, B. G. Song, I. S. Chun, H. Y. Lee, C. Kam, H. Kim, Y. H. Kang, M. J. Hindley, N. P. Mitchell, N. J. Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
topic_facet |
Antarctica gravity waves meteor radar MLT upper mesosphere /dk/atira/pure/subjectarea/asjc/1900/1902 name=Atmospheric Science /dk/atira/pure/subjectarea/asjc/1900/1908 name=Geophysics /dk/atira/pure/subjectarea/asjc/1900/1901 name=Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1912 name=Space and Planetary Science |
description |
Gravity wave (GW) activities in the upper mesosphere (80–100 km) and their potential sources are investigated using meteor radar observations at King Sejong Station, Antarctica (KSS; 62.22°S, 58.78°W) during recent 14 years (2007–2020). GW activities are estimated by horizontal wind variances of small-scale GWs (periods <2 h, horizontal wavelength <400 km, or vertical wavelength <3–5 km). The wind variances show clear semiannual variations with maxima at solstices, and annual variations are also seen above z = 90 km. The deseasonalized wind variances at z = 96.8 km have a statistically significant periodicity of ∼11 years that can be associated with solar cycle variations. Three major potential GW sources in the lower atmosphere are examined. Orography is a potential source of GWs in winter and autumn, when the basic-state wind is westerly from the surface up to the mesosphere. The residual of the nonlinear balance equation (RNBE) at 5 hPa, a diagnostic of the GWs associated with jet stream, is the largest in winter and has a secondary maximum in spring. The correlation between the observed GWs and RNBE is significant in equinoxes, while correlation is low in winter. Deep convection in storm tracks is a potential source in autumn and winter. Secondary GWs generated in the mesosphere can also be observed in the upper mesosphere. Ray-tracing analysis for airglow images observed at KSS indicates that secondary GWs are mostly generated in winter mesosphere, which may be associated with the breaking of orographic GWs. |
format |
Article in Journal/Newspaper |
author |
Song, B. G. Song, I. S. Chun, H. Y. Lee, C. Kam, H. Kim, Y. H. Kang, M. J. Hindley, N. P. Mitchell, N. J. |
author_facet |
Song, B. G. Song, I. S. Chun, H. Y. Lee, C. Kam, H. Kim, Y. H. Kang, M. J. Hindley, N. P. Mitchell, N. J. |
author_sort |
Song, B. G. |
title |
Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
title_short |
Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
title_full |
Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
title_fullStr |
Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
title_full_unstemmed |
Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources |
title_sort |
activities of small-scale gravity waves in the upper mesosphere observed from meteor radar at king sejong station, antarctica (62.22°s, 58.78°w) and their potential sources |
publishDate |
2021 |
url |
https://researchportal.bath.ac.uk/en/publications/88022f7f-057e-4761-b748-9a553f4a1c7f https://doi.org/10.1029/2021JD034528 https://purehost.bath.ac.uk/ws/files/287682891/JGR_Atmospheres_2021_Song_Activities_of_Small_Scale_Gravity_Waves_in_the_Upper_Mesosphere_Observed_From_Meteor_Radar.pdf http://www.scopus.com/inward/record.url?scp=85106686564&partnerID=8YFLogxK |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Song , B G , Song , I S , Chun , H Y , Lee , C , Kam , H , Kim , Y H , Kang , M J , Hindley , N P & Mitchell , N J 2021 , ' Activities of Small-Scale Gravity Waves in the Upper Mesosphere Observed From Meteor Radar at King Sejong Station, Antarctica (62.22°S, 58.78°W) and Their Potential Sources ' , Journal of Geophysical Research: Atmospheres , vol. 126 , no. 10 , e2021JD034528 . https://doi.org/10.1029/2021JD034528 |
op_relation |
https://researchportal.bath.ac.uk/en/publications/88022f7f-057e-4761-b748-9a553f4a1c7f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021JD034528 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
10 |
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1810290052613275648 |