| GAO Shan,WANG Hui. 2008. Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea. Acta Oceanologica Sinica, (6):17－32 |
| Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea |
| Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea |
| Received:November 20, 2007 Revised:March 03, 2008 |
| DOI： |
| Key words:phytoplankton biomass chlorophyll-a monsoon upwelling South China Sea |
| 中文关键词: phytoplankton biomass chlorophyll-a monsoon upwelling South China Sea |
| 基金项目:The National Natural Science Foundation of China from key program under contact No. 40531006 and from general program under contact No. 40576012. |
| Author Name | Affiliation | E-mail | | GAO Shan | Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China | | | WANG Hui | Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China
National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China | wanghui@cams.cma.gov.cn |
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| Abstract: |
| Seasonal variations of phytoplankton/chlorophyll-a (Chl-a) distribution, sea surface wind, sea height anomaly, sea surface temperature and other oceanic environments for long periods are analyzed in the South China Sea (SCS), especially in the two typical regions off the east coast of Vietnam and off the northwest coast of Luzon, using remote sensing data and other oceanographic data. The results show that seasonal and spatial distributions of phytoplankton biomass in the SCS are primarily influenced by the monsoon winds and oceanic environments. Off the east coast of Vietnam, Chl-a concentration is a peak in August, a jet shape extending into the interior SCS, which is associated with strong southwesterly monsoon winds, the coastal upwelling induced by offshore Ekman transport and the strong offshore current in the western SCS. In December, high Chl-a concentration appears in the upwelling region off the northwest coast of Luzon and spreads southwestward. Strong mixing by the strong northeasterly monsoon winds, the cyclonic circulation, southwestward coastal currents and river discharge have impacts on distribution of phytoplankton, so that the high phytoplankton biomass extends from the coastal areas over the northern SCS to the entire SCS in winter. These research activities could be important for revealing spatial and temporal patterns of phytoplankton and their interactions with physical environments in the SCS. |
| 中文摘要: |
| Seasonal variations of phytoplankton/chlorophyll-a (Chl-a) distribution, sea surface wind, sea height anomaly, sea surface temperature and other oceanic environments for long periods are analyzed in the South China Sea (SCS), especially in the two typical regions off the east coast of Vietnam and off the northwest coast of Luzon, using remote sensing data and other oceanographic data. The results show that seasonal and spatial distributions of phytoplankton biomass in the SCS are primarily influenced by the monsoon winds and oceanic environments. Off the east coast of Vietnam, Chl-a concentration is a peak in August, a jet shape extending into the interior SCS, which is associated with strong southwesterly monsoon winds, the coastal upwelling induced by offshore Ekman transport and the strong offshore current in the western SCS. In December, high Chl-a concentration appears in the upwelling region off the northwest coast of Luzon and spreads southwestward. Strong mixing by the strong northeasterly monsoon winds, the cyclonic circulation, southwestward coastal currents and river discharge have impacts on distribution of phytoplankton, so that the high phytoplankton biomass extends from the coastal areas over the northern SCS to the entire SCS in winter. These research activities could be important for revealing spatial and temporal patterns of phytoplankton and their interactions with physical environments in the SCS. |
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