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| Titel |
On the solar cycle dependence of winds and planetary waves as seen from mid-latitude D1 LF mesopause region wind measurements |
| VerfasserIn |
C. Jacobi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 16, no. 12 ; Nr. 16, no. 12, S.1534-1543 |
| Datensatznummer |
250013590
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| Publikation (Nr.) |
 copernicus.org/angeo-16-1534-1998.pdf |
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| Zusammenfassung |
At the Collm Observatory of the University of
Leipzig LF D1 low-frequency total reflection night-time wind measurements have
been carried out continuously for more than two decades. Using a multiple
regression analysis to derive prevailing winds, tides and the quasi-2-day wave
from the half-hourly mean values of the horizontal wind components, monthly mean
values of mesopause wind parameters are obtained that can be analysed with
respect to long-term trends and influences of solar variability. The response of
the prevailing wind to the 11-year solar cycle differs throughout the year.
While in winter no significant correlation between the zonal prevailing wind and
solar activity is found, in spring and summer a negative correlation between the
TWC can be seen from the measurements. This is connected with stronger vertical
gradients of the zonal prevailing wind during solar maximum than during solar
minimum. Since the amplitude of the quasi-2-day wave is dependent on the zonal
mean wind vertical gradient, this is connected with a positive correlation
between solar activity and quasi-two-day wave activity.
Key words. Meteorology and atmospheric dynamics ·
Middle atmosphere dynamics Multiple regression analysis Quasi-2-day wave |
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