Abstract
Field observations to investigate the structure of sea breezes have been made on Fukuoka Plain. The intrusion speeds of sea-breeze front are estimated from the distributions of horizontal wind divergence. The wind velocity before and after the arrival of sea-breeze front has been measured by using a Doppler sodar, and the vertical profiles of mean wind speed, standard deviation of horizontal and vertical wind velocities and turbulent kinetic energy have been obtained. They are normalized by using the maximum wind speed and the height at a half of the maximum speed. Especially, the normalization for the wind speed profiles seems to give a good similarity.
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