海洋レーダによる表層流速データの3次元流動計算への同化に関する研究

抄録

Data assimilation of surface current obtained by oceanic radar into 3-D baroclinic models is examined in Osaka Bay. Oceanic Radar is one of remote sensors that are possible to measure spatial distributions of near surface velocity. The observed currents include the effects of wind stress, waves, tides and buoyancy and so on. These data sets should be useful to the data assimilation of numerical simulations. The blending and nudging methods are applied and the decay of velocity in the vertical direction, a log law is added to blending. Assimilated currents and salinity distributions are compared with measured results of ADCP and STD. As a result, the blending was better than the nudging. RMS value of velocity differences between assimilated by blending and observed by ADCP in surface layer was 0.12cm/s.