Project's information

Project's title Researching the influence of sea surface temperature fluctuations on the activity of storms in the East Sea to serve storm forecasting
Project’s code VAST06.05/20-21
Research hosting institution Institute of Marine Geology and Geophysics
Project leader’s name MSc. Vu Hai Dang
Project duration 01/01/2020 - 30/06/2023
Project’s budget 600 million VND
Classify Grade B
Goal and objectives of the project

- Understanding the impact of storms on the variation of sea surface temperature field in the East Sea;
- Initial assessment of the influence of sea surface temperature anomalies caused by storms on the intensity and speed movement of storms.

Main results

- The statistical characteristics of storms operating in the East Sea have been analyzed based on a series of 31-year storm data (1990-2020). During the period 1990-2020, on average there were about 8.7 storms per year in the East Sea. The storm season starts in June and ends in December. The months with the most storm activity are July, August, and September. Storms affecting the East Sea are mainly storms with intensity from level 8 to 11 accounting for up to 67%, followed by storm intensity from level 12-13 accounting for 26%. Strong storms from level 14 or higher account for only about 7%.
- Spatial and temporal statistical characteristics of the sea surface temperature (SST) field in the East Sea in the period from June 2002 to May 2021 were analyzed based on high-resolution SST data from satellite. The trend of SST fluctuations in the period from June 2002 to May 2021 has also been determined. The trend of SST fluctuations in the East Sea ranges from - 0.1 to more than 0.6°C/10 years, almost the entire East Sea shows a strong increasing trend of SST, except for coastal areas and the Gulf of Thailand. The region with the largest increasing trend is the northern region of the East Sea, with a maximum of more than 0.6°C/10 years.
- The decrease in SST field caused by storms (decrease amplitude, area of decrease, decrease time) has been analyzed and evaluated in relation to the moving speed and intensity of the storms during the period from June 2002 to May 2021.
- Simulation results for 8 different storms based on using the WRF atmospheric model alone or in combination with the 3DPWP ocean model show that ocean-atmosphere interactions significantly reduce SST in the storm center area and ocean feedback to the atmosphere reduces latent and sensible heat fluxes, leading to reduced storm intensity when compared to the case where ocean-atmosphere interactions are not taken into account.

Novelty and actuality and scientific meaningfulness of the results

The results of this project have contributed to supplementing the database and scientific basis to solve the ocean-atmosphere interaction problem in storm simulation to enhance storm forecasting ability, thereby proposing solutions for storm forecasting and natural disaster prevention in Vietnam.

Products of the project

- Scientific papers in referred journals (list):
Tran Anh Tuan, Vu Hai Dang, Pham Viet Hong, Do Ngoc Thuc, Nguyen Thuy Linh, Nguyen Thi Anh Nguyet, Pham Thu Hien, Vu Le Phuong, 2020. Sea surface temperature trends and the influence of ENSO on the southwest sea of Vietnam using remote sensing data and GIS. Vietnam Journal of Marine Science and Technology, 20(2), 129–141.
Vu Hai Đang, Nguyen Thi Thanh, Pham Van Tien, Nguyen Ba Thuy, Đo Ngoc Thuc, 2022. The effect of atmosphere–ocean interaction on tropical cyclone simulations in the East Sea. Journal of Hydro-Meteorology, 743, 84-95; doi:10.36335/VNJHM.2022(743).84-95
Kim, Sooyoul, Hajime Mase, Nguyen Ba Thuy, Masahide Takeda, Cao Truong Tran, and Vu Hai Dang. 2020. Development of GMDH-Based Storm Surge Forecast Models for Sakaiminato, Tottori, Japan. Journal of Marine Science and Engineering 8, no. 10: 797.
- Technological products (describe in details: technical characteristics, place):
Data set and statistical characteristics of storms and sea surface temperature fields in the East Sea over the past time (minimum 30 years);
01 Scientific report on the results of storm impact assessment (relationship, mechanism...) on the change of sea surface temperature field during storms in the East Sea;
01 Scientific report on the results of assessment of the effects of sea surface temperature fluctuations on the trajectory, intensity... of storms (relationships, mechanisms...) in the East Sea.


Since these are only preliminary studies in this direction, project leader and Institute for marine Geology and Geophysics propose VAST to continue to provide funding for the authors to carry out similar research projects in the future.

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