Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic
The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wav...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Masaru Kogure [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of geophysical research / D - Washington, DC : Union, 1984, 122(2017), 15, Seite 7869 |
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| Übergeordnetes Werk: |
volume:122 ; year:2017 ; number:15 ; pages:7869 |
| Links: |
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| DOI / URN: |
10.1002/2016JD026360 |
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| Katalog-ID: |
OLC1997847647 |
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| 245 | 1 | 0 | |a Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic |
| 264 | 1 | |c 2017 | |
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| 520 | |a The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring | ||
| 650 | 4 | |a Winds | |
| 650 | 4 | |a Gravity | |
| 650 | 4 | |a Lidar | |
| 650 | 4 | |a Zonal winds | |
| 650 | 4 | |a Spring | |
| 650 | 4 | |a Wind velocity | |
| 650 | 4 | |a Potential energy | |
| 650 | 4 | |a Winter | |
| 650 | 4 | |a Wind speed | |
| 650 | 4 | |a Altitude | |
| 650 | 4 | |a Gravitation | |
| 650 | 4 | |a Gravitational waves | |
| 650 | 4 | |a Phase velocity | |
| 650 | 4 | |a Waves | |
| 650 | 4 | |a Radiosondes | |
| 650 | 4 | |a Seasonal variations | |
| 650 | 4 | |a Wind | |
| 650 | 4 | |a Temperature effects | |
| 650 | 4 | |a Annual variations | |
| 650 | 4 | |a Temperature | |
| 650 | 4 | |a Polar environments | |
| 650 | 4 | |a Wavelengths | |
| 650 | 4 | |a Scale height | |
| 650 | 4 | |a Filtration | |
| 650 | 4 | |a Profiles | |
| 650 | 4 | |a Energy | |
| 650 | 4 | |a Gravity waves | |
| 650 | 4 | |a Middle atmosphere | |
| 650 | 4 | |a Atmospheric pressure | |
| 650 | 4 | |a Ground stations | |
| 650 | 4 | |a Optical radar | |
| 650 | 4 | |a Temperature profiles | |
| 700 | 0 | |a Takuji Nakamura |4 oth | |
| 700 | 0 | |a Mitsumu K Ejiri |4 oth | |
| 700 | 0 | |a Takanori Nishiyama |4 oth | |
| 700 | 0 | |a Yoshihiro Tomikawa |4 oth | |
| 700 | 0 | |a Masaki Tsutsumi |4 oth | |
| 700 | 0 | |a Hidehiko Suzuki |4 oth | |
| 700 | 0 | |a Takuo T Tsuda |4 oth | |
| 700 | 0 | |a Takuya D Kawahara |4 oth | |
| 700 | 0 | |a Makoto Abo |4 oth | |
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| 773 | 1 | 8 | |g volume:122 |g year:2017 |g number:15 |g pages:7869 |
| 856 | 4 | 1 | |u http://dx.doi.org/10.1002/2016JD026360 |3 Volltext |
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10.1002/2016JD026360 doi PQ20171228 (DE-627)OLC1997847647 (DE-599)GBVOLC1997847647 (PRQ)p579-a4b8f7e9a64f0371f5f23805535cfa59211633b6b33b299b9189a6a5b9007730 (KEY)0137985220170000122001507869rayleighramanlidarobservationsofgravitywaveactivit DE-627 ger DE-627 rakwb eng 550 DNB Masaru Kogure verfasserin aut Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles Takuji Nakamura oth Mitsumu K Ejiri oth Takanori Nishiyama oth Yoshihiro Tomikawa oth Masaki Tsutsumi oth Hidehiko Suzuki oth Takuo T Tsuda oth Takuya D Kawahara oth Makoto Abo oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 122(2017), 15, Seite 7869 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:122 year:2017 number:15 pages:7869 http://dx.doi.org/10.1002/2016JD026360 Volltext https://search.proquest.com/docview/1931705659 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 122 2017 15 7869 |
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10.1002/2016JD026360 doi PQ20171228 (DE-627)OLC1997847647 (DE-599)GBVOLC1997847647 (PRQ)p579-a4b8f7e9a64f0371f5f23805535cfa59211633b6b33b299b9189a6a5b9007730 (KEY)0137985220170000122001507869rayleighramanlidarobservationsofgravitywaveactivit DE-627 ger DE-627 rakwb eng 550 DNB Masaru Kogure verfasserin aut Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles Takuji Nakamura oth Mitsumu K Ejiri oth Takanori Nishiyama oth Yoshihiro Tomikawa oth Masaki Tsutsumi oth Hidehiko Suzuki oth Takuo T Tsuda oth Takuya D Kawahara oth Makoto Abo oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 122(2017), 15, Seite 7869 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:122 year:2017 number:15 pages:7869 http://dx.doi.org/10.1002/2016JD026360 Volltext https://search.proquest.com/docview/1931705659 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 122 2017 15 7869 |
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10.1002/2016JD026360 doi PQ20171228 (DE-627)OLC1997847647 (DE-599)GBVOLC1997847647 (PRQ)p579-a4b8f7e9a64f0371f5f23805535cfa59211633b6b33b299b9189a6a5b9007730 (KEY)0137985220170000122001507869rayleighramanlidarobservationsofgravitywaveactivit DE-627 ger DE-627 rakwb eng 550 DNB Masaru Kogure verfasserin aut Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles Takuji Nakamura oth Mitsumu K Ejiri oth Takanori Nishiyama oth Yoshihiro Tomikawa oth Masaki Tsutsumi oth Hidehiko Suzuki oth Takuo T Tsuda oth Takuya D Kawahara oth Makoto Abo oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 122(2017), 15, Seite 7869 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:122 year:2017 number:15 pages:7869 http://dx.doi.org/10.1002/2016JD026360 Volltext https://search.proquest.com/docview/1931705659 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 122 2017 15 7869 |
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10.1002/2016JD026360 doi PQ20171228 (DE-627)OLC1997847647 (DE-599)GBVOLC1997847647 (PRQ)p579-a4b8f7e9a64f0371f5f23805535cfa59211633b6b33b299b9189a6a5b9007730 (KEY)0137985220170000122001507869rayleighramanlidarobservationsofgravitywaveactivit DE-627 ger DE-627 rakwb eng 550 DNB Masaru Kogure verfasserin aut Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles Takuji Nakamura oth Mitsumu K Ejiri oth Takanori Nishiyama oth Yoshihiro Tomikawa oth Masaki Tsutsumi oth Hidehiko Suzuki oth Takuo T Tsuda oth Takuya D Kawahara oth Makoto Abo oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 122(2017), 15, Seite 7869 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:122 year:2017 number:15 pages:7869 http://dx.doi.org/10.1002/2016JD026360 Volltext https://search.proquest.com/docview/1931705659 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 122 2017 15 7869 |
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10.1002/2016JD026360 doi PQ20171228 (DE-627)OLC1997847647 (DE-599)GBVOLC1997847647 (PRQ)p579-a4b8f7e9a64f0371f5f23805535cfa59211633b6b33b299b9189a6a5b9007730 (KEY)0137985220170000122001507869rayleighramanlidarobservationsofgravitywaveactivit DE-627 ger DE-627 rakwb eng 550 DNB Masaru Kogure verfasserin aut Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles Takuji Nakamura oth Mitsumu K Ejiri oth Takanori Nishiyama oth Yoshihiro Tomikawa oth Masaki Tsutsumi oth Hidehiko Suzuki oth Takuo T Tsuda oth Takuya D Kawahara oth Makoto Abo oth Enthalten in Journal of geophysical research / D Washington, DC : Union, 1984 122(2017), 15, Seite 7869 (DE-627)130444391 (DE-600)710256-2 (DE-576)015978818 2169-897X nnns volume:122 year:2017 number:15 pages:7869 http://dx.doi.org/10.1002/2016JD026360 Volltext https://search.proquest.com/docview/1931705659 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 AR 122 2017 15 7869 |
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Masaru Kogure @@aut@@ Takuji Nakamura @@oth@@ Mitsumu K Ejiri @@oth@@ Takanori Nishiyama @@oth@@ Yoshihiro Tomikawa @@oth@@ Masaki Tsutsumi @@oth@@ Hidehiko Suzuki @@oth@@ Takuo T Tsuda @@oth@@ Takuya D Kawahara @@oth@@ Makoto Abo @@oth@@ |
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The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Winds</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gravity</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Lidar</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Zonal winds</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Spring</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Wind velocity</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Potential 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Masaru Kogure |
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550 DNB Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic Winds Gravity Lidar Zonal winds Spring Wind velocity Potential energy Winter Wind speed Altitude Gravitation Gravitational waves Phase velocity Waves Radiosondes Seasonal variations Wind Temperature effects Annual variations Temperature Polar environments Wavelengths Scale height Filtration Profiles Energy Gravity waves Middle atmosphere Atmospheric pressure Ground stations Optical radar Temperature profiles |
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rayleigh/raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over syowa (69°s, 40°e), the antarctic |
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Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic |
| abstract |
The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring |
| abstractGer |
The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring |
| abstract_unstemmed |
The potential energy of gravity waves (GWs) per unit mass (Ep), at altitudes of 15-70 km, has been examined from temperature profiles obtained by a Rayleigh/Raman lidar at Syowa Station (69°S, 40°E) from May 2011 to October 2013, with the exception of the summer months. The GWs with ground-based wave periods longer than 2 h and vertical wavelengths between 1.8 and 16 km were extracted from the temperature profiles. Ep was larger in winter than in spring and fall, although in 2012, at altitudes below 30 km, Ep was larger in spring than in winter and fall. Ep increased with a mean scale height of 11.3 km. Ep profiles showed a local maximum at an altitude of 20 km and a minimum at 25 km in almost every month, which has not been reported by previous studies observed by radiosondes. The values of Ep in October of 2012 were smaller at 35-60 km and larger at 20-35 km than those in October of 2011 and 2013. This difference in the Ep profile is most probably caused by different seasonal variations of zonal winds. The larger and smaller Ep values seem to be observed both below and above the altitude at which the zonal wind speed reached 0 m s-1. This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring |
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Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70ￂ km altitude over Syowa (69°S, 40°E), the Antarctic |
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This result suggests that wind filtering of gravity waves with small phase speeds is significantly important in early spring. Key Points Gravity wave potential energy at altitudes from 15 to 70 km is estimated from Rayleigh/Raman lidar observations Vertical variation of gravity wave activity in the middle atmosphere over the Antarctic is revealed quantitatively Wind filtering of gravity waves with small zonal phase speeds affects the vertical variation of gravity wave activity in early spring</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Winds</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gravity</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Lidar</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Zonal winds</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Spring</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Wind velocity</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Potential 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code="4">oth</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Hidehiko Suzuki</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Takuo T Tsuda</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Takuya D Kawahara</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Makoto Abo</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Journal of geophysical research / D</subfield><subfield code="d">Washington, DC : Union, 1984</subfield><subfield code="g">122(2017), 15, Seite 7869</subfield><subfield code="w">(DE-627)130444391</subfield><subfield code="w">(DE-600)710256-2</subfield><subfield code="w">(DE-576)015978818</subfield><subfield code="x">2169-897X</subfield><subfield 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