Ocean internal waves is one of the important forms of sea water movement. It is a wave generated by the vertical oscillation of sea water and occurs in the ocean. The change of sea surface current caused by its movement and propagation can modulate the spatial distribution of sea surface micro-scale waves, and thenimage on synthetic aperture radar and optical images. The geostationary satellite Himawari provides visible images continuously observed at the same place every 10 minutes. It is equipped with an Advanced Himawari Imager so that internal waves can be continuously observed during sunglint and cloudless periods. Thisthree-year research project is a series of research processes from satellite oceanography to ocean physics and then to ocean biogeochemistry. The problem to be discussed or solved is to use the Himawari Level-0 database from July 2015 to now to find the characteristics of ocean internal waves in the waters adjacent to Taiwan, calculate and analyze the retrieved internal wave dynamic parameters such as internal wave phase velocity, apparent full width of the trough, depth and amplitude, so as to improve the cognition and dynamic mechanism process of ocean internal waves. In the process of calculating the Level-0 to level-2 data of Himawari satellite, the physical properties of internal waves and their correlation with ocean surface temperature and chlorophyllconcentration are discussed. In addition, the second generation global imager (SGLI) carried by the global climate change observation mission satellite (GCOMC), SPOT satellite series optical images and sentinel-1 C-band SAR images will be used as one of the data. The main research topics include (1) the dynamic process of internal wave propagation in the sea area near Dongsha Atoll and its influence on SST and chlorophyll concentration, (2) the relationship between internal tide and temperature drop in Nanwan Bay and the variationcharacteristics of chlorophyll concentration in and out of the bay, and (3) spatial distribution of internal waves in the continental shelf in Northeast Taiwan.
|Effective start/end date||1/10/21 → 31/07/22|
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):