 |
| Titel |
Evidence of gravity waves into the atmosphere during the March 2006 total solar eclipse |
| VerfasserIn |
C. S. Zerefos, E. Gerasopoulos, I. Tsagouri, B. E. Psiloglou, A. Belehaki, T. Herekakis, A. Bais, S. Kazadzis, C. Eleftheratos, N. Kalivitis, N. Mihalopoulos |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 18 ; Nr. 7, no. 18 (2007-09-26), S.4943-4951 |
| Datensatznummer |
250005204
|
| Publikation (Nr.) |
 copernicus.org/acp-7-4943-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| This study aims at providing experimental evidence, to support the
hypothesis according to which the movement of the moon's shadow sweeping the
ozone layer at supersonic speed, during a solar eclipse, creates gravity
waves in the atmosphere. An experiment was conducted to study eclipse
induced thermal fluctuations in the ozone layer (via measurements of total
ozone column, ozone photolysis rates and UV irradiance), the ionosphere
(Ionosonde Total Electron Content – ITEC, peak electron density height –
hmF2), and the troposphere (temperature, relative humidity), before, during
and after the total solar eclipse of 29 March 2006. We found the existence
of eclipse induced dominant oscillations in the parameters related to the
ozone layer and the ionosphere, with periods ranging between 30–40 min.
Cross-spectrum analyses resulted to statistically significant square
coherences between the observed oscillations, strengthening thermal
stratospheric ozone forcing as the main mechanism for GWs. Additional
support for a source below the ionosphere was provided by the amplitude of
the oscillations in the ionospheric electron density, which increased
upwards from 160 to 220 km height. Even though similar oscillations were
shown in surface temperature and relative humidity data, no clear evidence
for tropospheric influence could be derived from this study, due to the
modest amplitude of these waves and the manifold rationale inside the
boundary layer. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|