Structural changes in lower ionosphere wind trends at midlatitudes
Long-term variability of the mesosphere/lower thermosphere (lower E region ionosphere) since 1970 has been analyzed using wind data series obtained at Collm (52° N, 15° E) using the LF drift method and at Obninsk (55° N, 37° E) applying VHF meteor radar. Applying piecewise linear trend analysis with...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2010-10-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/8/231/2010/ars-8-231-2010.pdf |
| Summary: | Long-term variability of the mesosphere/lower thermosphere (lower E region
ionosphere) since 1970 has been analyzed using wind data series obtained at
Collm (52° N, 15° E) using the LF drift method and at Obninsk (55° N, 37° E)
applying VHF meteor radar. Applying piecewise linear trend
analysis with a priori unknown number and positions of breakpoints shows
that trend models with breakpoints are generally to be preferred against
straight lines. There is a strong indication for a change of trends in wind
parameters around 1975–1980. Similar changes are also found in the lower
atmosphere, e.g., in tropospheric temperatures. This indicates a coupling
between atmospheric layers at time scales of decades. |
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| ISSN: | 1684-9965 1684-9973 |