[A-AS08] General Meteorology

[AAS08-12] Types of sea breeze in Kanto-Plain:an numerical analysis

★Invited Papers

*Toru Sugiyama¹ (1.Japan Agency for Marine-Earth Science and Technology, Research Institute for Value-Added-Information Generation, Center for Earth Information Science and Technology)

Keywords:sea breeze, numerical simulation

We report the results of numerical simulations on the characteristics of summer sea breezes in the Kanto Plain. The model is the MSSG model, and a multi-nested method (resolution of 100 m) ares conducted mainly in eastern Kanagawa Prefecture. The origins of the sea breeze observed in eastern Kanagawa Prefecture are the southerly wind from Sagami Bay and the easterly wind from Tokyo Bay, and their spatio-temporal distribution over land depends on their strength. First, we will report on the parameters that determine the spatio-temporal distribution as well as the classification methods for both. Next, we discuss the three-dimensional structure of each sea breeze. The countercurrent structure differs from a pure sea breeze because the sea breeze enters from two directions. In other words, at the ridgeline where southerly and easterly winds meet, different structures are formed depending on the characteristics of both sea breezes. In this presentation, we will discuss the structure revealed through high-resolution calculations as described above.