抄録
Identifying the pre-convective condition of the atmospheric boundary layer plays an important role in the prediction of extreme weather events. To achieve this, acquisition of low-level flow fields is necessary. Latest available wind vector dataset, called Atmospheric Motion Vector (AMV), is still incapable for estimating near-ground level fields. We investigated the possibility applying the Thermal Image Velocimetry (TIV) method to Himawari-8 satellite retrievals to estimate near-ground level fields in cloud-free areas, identified during days of calm weather with sea-breeze penetration.
A sea-breeze day event on August 4,2015 was selected. Average sea-breeze inland penetration speed was estimated to be ~3.6 m/s and ~1.8 m/s from Sagami Bay and Tokyo Bay, respectively. The derived motion vector of advection flow from TIV revealed the general pattern of near-surface atmospheric flow due to sea-breeze phenomena.
