Physics
Scientific paper
Apr 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jgra..11704301y&link_type=abstract
Journal of Geophysical Research, Volume 117, Issue A4, CiteID A04301
Physics
Ionosphere: Equatorial Ionosphere, Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Ionospheric Dynamics, Atmospheric Processes: Stratospheric Dynamics, Atmospheric Processes: Tides And Planetary Waves
Scientific paper
A quantitative comparison of the geomagnetic lunar tide and lower stratospheric parameters (zonal mean air temperature T and zonal mean zonal wind U) is carried out for the period 1958–2007. The correlation between the amplitude of the geomagnetic lunar tide at an equatorial station, Addis Ababa, and the lower stratospheric parameters from the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP-NCAR) reanalysis is examined. It is found that the lunar tidal amplitude tends to be positively and negatively correlated with the stratospheric T and U, respectively, in high latitudes of the Northern Hemisphere during December and January. High correlations are observed in approximately 70% of stratospheric sudden warming (SSW) events. The results suggest that variability of the geomagnetic lunar tide during the northern winter is closely linked with dynamical changes in the lower stratospheric parameters associated with SSWs.
Richmond Arthur D.
Yamazaki Yasuhiro
Yumoto Kiyo
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