MARINE ENVIRONMENT ANALYSIS UNDER SUPER TYPHOON HAGIBIS USING CMEMS DATA

抄録

 Avariety of satellite remote sensing has been used to investigate ocean dynamics affected by typhoons in Northwest Pacific Ocean (NPO). At present, the Copernicus Marine Environment Monitoring Service (CMEMS) can provide 6-hourly wind and daily ocean data through a blend between multi-satellite remote sensing, oceanographic observation and reanalysis. CMEMS data were used in this paper to investigate the oceanic response under the condition of existing Kuroshio Current during the 2019 super typhoon HAGIBIS. The use of 6-hourly wind speed data in CMEMS can provide that wind-induced vertical mixing (P_w) was formed around both left and the right semicircle of the typhoon, while Ekman pumping velocity (EPV) was formed at the center of the typhoon. As a result of them, daily physical oceanic changes in sea surface temperature (SST), salinity (SSS), and mixed layer depth (MLD) under HAGIBIS were biased by each strongly influenced area by P_w on the left and right sides, and EPV in the center of the typhoon. Further, massive cooling SST was caused by the upwelling effect of HAGIBIS in combination with pre-existing cyclonic eddy induced by the Kuroshio Current, and the low SSS concentration area was detected on the left side of the typhoon track as an effect of the heavy rainfall accompanied by HAGIBIS.