Advection of chlorophyll concentration in the Hupo Bank in the East/Japan Sea
Abstract
The Hupo Bank is known for a biological "hotspot", located in the East/Japan Sea (hereafter the East Sea). To better understand the phytoplankton blooms distribution in the East Sea, especially in the Hupo Bank, moderate resolution imaging spectroradiometer (MODIS) chlorophyll concentration (Chl) was analyzed for general spatial and temporal variability based on empirical orthogonal function (EOF) analysis. EOF results showed that every spring and fall seasons, phytoplankton blooms occur in the East Sea with different sizes in various locations. Furthermore, four physical factors influencing Chl changes were examined for their specific roles in biological blooms based on the neural network (NN). The physical factors include sea surface temperature anomaly (SSTA), coastal upwelling, photosynthetically available radiation (PAR) anomaly, and advection of Chl by sea surface currents. The research results suggest that the physical factors differently contributed to the enhancement of Chl in the Hupo Bank. This is the first research to consider the advection of Chl for physical factor of marine condition. Although research results suggest that SSTA was the most influence factor, advection of Chl was also one of major physical factors in the Hupo Bank. Therefore, we concluded that advection of Chl should be considered for physical condition of local Chl bloom changes.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMEP21B0865K
- Keywords:
-
- 1902 Community modeling frameworks;
- INFORMATICSDE: 3022 Marine sediments: processes and transport;
- MARINE GEOLOGY AND GEOPHYSICSDE: 4217 Coastal processes;
- OCEANOGRAPHY: GENERALDE: 4235 Estuarine processes;
- OCEANOGRAPHY: GENERAL