- Titel
- Long-term trends of midlatitude horizontal mesosphere/lower thermosphere winds over four decades
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-1016491
- Quellenangabe
- Advances in radio science
Erscheinungsjahr: 2023
Jahrgang: 21
Seiten: 111-121
ISSN: 1684-9965
E-ISSN: 1684-9973 - Erstveröffentlichung
- 2023
- Abstract (EN)
- We analyse 43 years of mesosphere/lower thermo- sphere (MLT) horizontal winds obtained from a joint analy- sis of low frequency (LF) spaced receiver lower ionospheric drift measurements from late 1978 through 2008 and VHF meteor radar wind observations since summer 2004 at Collm (51.3◦ N, 13.0◦ E). Due to limitations of the earlier LF mea- surements, we restrict ourselves to the analysis of monthly mean winds near 90 km, which represents the meteor peak height as well as mean LF reflection heights in the MLT. We observe mainly positive trends of the zonal prevailing wind throughout the year, while the meridional winds tend to decrease in magnitude in both summer and winter. Further- more, there is a change in long-term trends around the late 1990s, which is most clearly visible in summer MLT winds. We compare these measurements with long-term partial re- flection radar observations of winds at 81–85 km over Julius- ruh (54.6◦ N, 13.4◦ E) since 1990, and find general qualita- tive agreement of trends except for summer. The latter can be explained by the different altitudes considered, and by the latitude dependence of the summer mesospheric jet.
- Andere Ausgabe
- Erstveröffentlichung
DOI: 10.5194/ars-21-111-2023 - Freie Schlagwörter (EN)
- thermosphere, mesosphere
- Klassifikation (DDC)
- 550
- Verlag
- Copernicus Publications, Göttingen
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa2-1016491
- Veröffentlichungsdatum Qucosa
- 19.01.2026
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0