| Summary: | 碩士 === 國立臺灣海洋大學 === 海洋環境資訊學系 === 100 === In order to explore the aerosol in the South China Sea (SCS) and its relationship with the chlorophyll conentration, this study uses the empirical orthogonal function to analyze the data, including the aerosol optical depth (AOD) from the Terra MODIS (Moderate Resolution Imaging Spectroradiometer) and the chlorophyll-a (Chlor) concentration from the SeaWiFS (Sea-viewing Wide Field-of-view Sensor). Besides, the Aerosol Fine Mode Fraction and thermal anomalies includes fire occurrence from the MODIS, the back trajectory from HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory Model) of NOAA (National Oceanic and Atmospheric Administration), and the MSLA (Maps of Sea Level Anomalies) assist the analysis in this study.
The high value of coarse aerosol optical thickness (AOT_C) appears from March to April in Mainland China. In addition, the fine aerosol optical thickness (AOT_F) in the South China Sea is principally affected by the biomass burning from Indo-China Peninsula and the Indonesia island, Borneo, where the high value of AOT_F is respectively found from March to April and August to October. Furthermore, the results also show that after standardizing, the chlorophyll concentration is found rising in the Luzon northwestern offshore and the Vietnam southeastern offshore in different monsoon seasons.
To investigate the influence of aerosol on chlorophyll in the SCS, this study excludes the data of upwelling areas and calculates the correlation between aerosol and chlorophyll concentration. Consequently, the correlation coefficient between Chlor and AOT_C is located at 0.3~0.5, apparently higher than the others. It means that the AOT_C may enhance the growth of phytoplankton most. Especially, the correlation coefficient between AOT_C and Chlor even reaches 0.7~0.9 both in the northern SCS in spring and the southern SCS in summer.
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