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[MZZ48-P05] Impacts of sea surface temperature on the winter monsoon blowing into northern Japan
Keywords:ocean wind, sea surface temperature, Japan Sea, offshore wind energy
Offshore wind energy is rapidly being developed in Japan. The central region of the development of offshore wind energy is sea areas along the Japan Sea coast of northern Japan. This is mainly because the coastal regions have a great deal of wind resource associated with winter monsoon with high speeds. For the winter monsoon blowing across the Japan Sea, sea surface temperature (SST) is a key factor for understanding the wind resource and variability. Thus, further understanding of the impact of SST is required.
This study investigates the effects of SST in the Japan Sea on the winter monsoon blowing toward northern Japan from comparative numerical experiments by using meteorological model simulation. We mainly focus on the coastal region along the coast of northern Japan. This region corresponds to the warm water of the Tsushima Warm Current. The study period ranges from 30 December, 2020 to 3 January, 2021. During this period, strong cold surges occurred. First, we investigated the surface winds over the Japan Sea and the associated atmospheric fields by using realistically reproduced SST. Next, we conducted comparative experiments with different SST fields. We made modified SST with smoothed frontal structure of the warm water near the coast to compare the simulation results with those with the realistically reproduced SST. The winds are intensified when blowing over the region with higher SST and the intensified winds extend downwind. The wind speeds gradually decrease over the region with little SST difference. Thus, this study shows the impacts of coastal SST on the wind and the results have implications for resource and variability of wind energy.
This study investigates the effects of SST in the Japan Sea on the winter monsoon blowing toward northern Japan from comparative numerical experiments by using meteorological model simulation. We mainly focus on the coastal region along the coast of northern Japan. This region corresponds to the warm water of the Tsushima Warm Current. The study period ranges from 30 December, 2020 to 3 January, 2021. During this period, strong cold surges occurred. First, we investigated the surface winds over the Japan Sea and the associated atmospheric fields by using realistically reproduced SST. Next, we conducted comparative experiments with different SST fields. We made modified SST with smoothed frontal structure of the warm water near the coast to compare the simulation results with those with the realistically reproduced SST. The winds are intensified when blowing over the region with higher SST and the intensified winds extend downwind. The wind speeds gradually decrease over the region with little SST difference. Thus, this study shows the impacts of coastal SST on the wind and the results have implications for resource and variability of wind energy.