Physics
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jastp..60.1081h&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 60, Issue 11, p. 1081-1087.
Physics
6
Scientific paper
Mean winds in the mesopause region (78-98 km) were observed in northern (45°N) and southern (31°N) Japan by MF radars. The change of the horizontal wind vector with height is illustrated by means of hodographs for solstices and equinoxes. The observations in southern Japan show a stronger meridional wind than in northern Japan. At the December solstice 1996 the meridional wind over southern Japan changes from a northward wind of around 15 ms at 78 km to a southward wind of 10 ms at 98 km height. At the March and September equinoxes the southward wind increases from around 0 to 15 ms in this region. The observed meridional wind is significantly stronger than the meridional wind of the empirical HWM93 wind model, but is in agreement with previous observations by the MU radar in Kyoto (35°N). The temporal behaviour of the mean wind hodographs is shown for the three annual cycles from 1994-1997 over southern Japan.
Hocke Klemens
Igarashi Kaori
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