The horizontal winds in the mesosphere and lower thermosphere (MLT) at heights of about 80-100 km have been measured by the SKiYMET meteor radar at Collm, Germany (51.3°N, 13°E). The radar has been operating continuously since July 2004, and the data from December 2004 – December 2009 were used for constructing a climatology of the 8-h tide. The 8-h tide appears to be a regular feature in the MLT. In particular, the amplitude shows a clear seasonal behaviour, with maximum values around the equinoxes, and generally an increase with height. The largest amplitudes occur in autumn, sometimes reaching values above 15 m/s, but they are significantly smaller during summer (~1 m/s). The phase is early in winter and advances to later times in summer. In general, the phase difference between the zonal and meridional
components is close to +2 h. The vertical wavelengths are short in summer (~30 km) but significant longer during the rest of the year. The results were compared with observations from locations of different latitudes.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:16387 |
| Date | 28 September 2017 |
| Creators | Fytterer, Tilo, Jacobi, Christoph |
| Contributors | Universität Leipzig, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English, German |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | urn:nbn:de:bsz:15-qucosa-212056, qucosa:15000 |
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