Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China
Vertical wave number spectra of inertial gravity waves in the troposphere and lower stratosphere over six stations at latitudes from 20° N to 40° N were statistically studied by using the data from Radiosonde observation on a twice daily basis at 08:00 and 20:00 LT. Statistically...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2006-12-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/24/3257/2006/angeo-24-3257-2006.pdf |
| _version_ | 1818476042344464384 |
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| author | Shao Dong Zhang Shao Dong Zhang Chunming Huang Chunming Huang Fan Yi Fan Yi |
| author_facet | Shao Dong Zhang Shao Dong Zhang Chunming Huang Chunming Huang Fan Yi Fan Yi |
| author_sort | Shao Dong Zhang |
| collection | DOAJ |
| description | Vertical wave number spectra of inertial gravity waves in
the troposphere and lower stratosphere over six stations at latitudes from
20° N to 40° N were statistically studied by using the data from
Radiosonde observation on a twice daily basis at 08:00 and 20:00 LT.
Statistically, the spectral characteristics seem to be independent of the
local observation time, and show considerable conformity between the
spectral of zonal and meridional kinetic energy densities. Compared with the
spectra of the kinetic energy density, the spectra of the potential energy
density are steeper. in addition the characteristic wave numbers of the spectra also
show considerable consistency among the observations at different stations.
As for the spectral slopes, they are systematically smaller (in magnitude)
than the canon value of –3, and exhibit slight height, seasonal and
latitudinal variability. In addition to these universal characteristics, the
spectral structures also exhibit departures and variations, and most of the
departures and variations are related to the strong tropospheric jets.
Generally, in the case of strong shear due to the tropospheric jet, there
usually occur larger characteristic wave numbers and smaller spectral slopes.
These departures seem to be persistent and climatological rather than
transitory, indicating the significant impacts of the sheared background
winds on the spectral structures of gravity waves. |
| first_indexed | 2024-12-10T09:20:34Z |
| format | Article |
| id | doaj.art-bd03aa3cf60d4d2581ba5b7756e63293 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-10T09:20:34Z |
| publishDate | 2006-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-bd03aa3cf60d4d2581ba5b7756e632932022-12-22T01:54:42ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762006-12-01243257326510.5194/angeo-24-3257-2006Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central ChinaShao Dong Zhang0Shao Dong Zhang1Chunming Huang2Chunming Huang3Fan Yi4Fan Yi5School of Electronic Information, Wuhan University, Wuhan, People's Republic of ChinaKey Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, People's Republic of ChinaSchool of Electronic Information, Wuhan University, Wuhan, People's Republic of ChinaKey Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, People's Republic of ChinaSchool of Electronic Information, Wuhan University, Wuhan, People's Republic of ChinaKey Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, People's Republic of ChinaVertical wave number spectra of inertial gravity waves in the troposphere and lower stratosphere over six stations at latitudes from 20° N to 40° N were statistically studied by using the data from Radiosonde observation on a twice daily basis at 08:00 and 20:00 LT. Statistically, the spectral characteristics seem to be independent of the local observation time, and show considerable conformity between the spectral of zonal and meridional kinetic energy densities. Compared with the spectra of the kinetic energy density, the spectra of the potential energy density are steeper. in addition the characteristic wave numbers of the spectra also show considerable consistency among the observations at different stations. As for the spectral slopes, they are systematically smaller (in magnitude) than the canon value of –3, and exhibit slight height, seasonal and latitudinal variability. In addition to these universal characteristics, the spectral structures also exhibit departures and variations, and most of the departures and variations are related to the strong tropospheric jets. Generally, in the case of strong shear due to the tropospheric jet, there usually occur larger characteristic wave numbers and smaller spectral slopes. These departures seem to be persistent and climatological rather than transitory, indicating the significant impacts of the sheared background winds on the spectral structures of gravity waves.https://www.ann-geophys.net/24/3257/2006/angeo-24-3257-2006.pdf |
| spellingShingle | Shao Dong Zhang Shao Dong Zhang Chunming Huang Chunming Huang Fan Yi Fan Yi Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China Annales Geophysicae |
| title | Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China |
| title_full | Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China |
| title_fullStr | Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China |
| title_full_unstemmed | Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China |
| title_short | Radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over Central China |
| title_sort | radiosonde observations of vertical wave number spectra for gravity waves in the lower atmosphere over central china |
| url | https://www.ann-geophys.net/24/3257/2006/angeo-24-3257-2006.pdf |
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