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| Titel |
Presence of quasi 27-day oscillations in the atmosphere |
| VerfasserIn |
M. C. Liang, K. F. Li, Y. L. Yung |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026957
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| Zusammenfassung |
| We analyzed multiple years of the FORMOSAT-3/COSMIC GPS radio occultation, MLS,
AIRS, and NCEP Reanalysis 2 data. Here we report temperature variations in the
atmosphere from the middle troposphere to mesosphere. Spectral analysis shows that the
dominant powers are associated with the annual and semiannual (depending on
altitudes and latitudes) cycles, followed by ~60, 27, and 13.5-day variations. ~60-day
oscillation may be related to MJO. A likely source of the 13.5 and 27 days is solar
forcing, originating from the rotation of the Sun. Such short-term periodic forcing and
response can potentially provide a useful constraint for studying climate variability. |
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