[세미나] Prof. Naoki Hirose

October 17, 2018

Coastal Ocean Data Assimilation Experiment with Small-Scale Fisheries


Prof. Naoki Hirose (Kyushu University)

2018년 10월 17일 (수) 16:00

과학관 553호


Abstract

Coastal Ocean Data Assimilation Experiment with Small-Scale Fisheries

Coastal fishing economy has been shrinking in the last few decades in Japan (and probably similar in Korea). To save the small-scale fisheries, a new research project “Smart coastal fisheries with information and communication technology” has been funded by Japan Fisheries Agency since 2017. The virtue of small fisheries is the small influence to the environment. Our accurate ocean prediction can help their effective operations to catch the bare minimum of fishes at minimum cost. The coastal ocean prediction in the Tsushima/Korea Strait has been quickly recognized by the local fishermen. They are frequently visiting our web site (http://dreams-d.riam.kyushu-u.ac.jp/) and discussing the best fishing ground/time before the departure. Minimization of fuel and labor should be contributing to their income and working environment already. The accuracy of ocean prediction can be improved by number of data. The smart fisheries project is also inventing a new CTD instrument dedicated to the fishermen. This simple, small, and affordable CTD is now at evaluation phase and will be on domestic sale in 2019. The important parameters of the TKS model have been already calibrated by using recycling Green’s functions with the constraint of institutional CTD data. For instance, the bulk transfer coefficients of sensible and latent heat fluxes were modified to the opposite directions, respectively. The calibration of open boundary conditions is decreasing the cost function even more effectively. The optimization of such parameters has been already applied to the operational run. In the following years, dozens of CTD castings are expected from the fishing activities to increase the accuracy of the coastal ocean model through the approximate Kalman filtering.