Short-Term Variability of Nonmigrating Diurnal Tides
Abstract
Daily values of nonmigrating diurnal tides have been derived from SABER temperatures using deconvolution methods. We focus on the behavior of DW2 and DE3, and compare these with diurnal proxies of EOS MLS temperatures, and diurnal tides derived from NOGAPS-ALPHA hourly forecasts. DE3 is most prominent at equatorial latitudes between June and November, and exhibits month-to-month variations during this period. Deconvolved values agree well with EOS MLS DE3 tidal proxies, and with DE3 computed from NOGAPS-ALPHA temperatures. DW2 maximizes at low latitudes between October and March, and varies on a week-to-week basis. The DW2 in NOGAPS_ALPHA shows very good agreement with the SABER-derived values. The corresponding MLS diurnal proxy exhibits a deeper wavelength, and weaker amplitudes, possibly due to the the deeper vertical weighting functions in the upper mesosphere.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSA23A2137L
- Keywords:
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- 3332 ATMOSPHERIC PROCESSES / Mesospheric dynamics;
- 3389 ATMOSPHERIC PROCESSES / Tides and planetary waves