Abstract:Underwater glider, a new mobile observation platform, can observe the ocean’s response during tropical cyclones in considerable detail, and by employing the observation data, the accuracy of typhoon forecasts can be significantly improved. This paper starts with the advantages of underwater gliders compared with other tropical cyclone observation methods, based on the observation of historical data of temperature and salt anomaly of “Petrel-II” underwater gliders for Typhoon Hato, combined with the observation data of satellites and JMA (Japan Meteorology Agency)database in the same period, the temperature and salt anomaly response in horizontal and vertical directions are analyzed. It has been confirmed that four “Petrel-II” underwater gliders made fine profile observations on the ocean response caused by Typhoon Hato in 2017, which can effectively capture the vertical mixing phenomenon during the typhoon and the influence of rainfall on salinity in the observation area, and the ocean response degree during the typhoon is related to the location of the typhoon. That is, the closer the ocean is to the typhoon path during the typhoon, the more obvious the temperature and salt anomaly is, and the magnitude of temperature anomalies is greater on the right side of the typhoon path compared to the left side of the path.
