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Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea
作者姓名:GAO Shan  WANG Hui
作者单位: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) 
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 upwetling 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.

关 键 词:浮游植物生物量  西南季风  海洋环境  空间分布  季节变化  南中国海  叶绿素a浓度  Sea
收稿时间:2007/11/20 0:00:00
修稿时间:3/3/2008 12:00:00 AM

Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea
GAO Shan,WANG Hui.Seasonal and spatial distributions of phytoplankton biomass associated with monsoon and oceanic environments in the South China Sea[J].Acta Oceanologica Sinica,2008,27(6):17-32.
Authors:GAO Shan and WANG Hui
Affiliation:1.Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China2.Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China;National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China
Abstract:Seasonal variations of phytoplankton/chiorophyll-a (Chl-a) distribution,sea surface wind,sea height anomaly,sea surface tem-perature 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 mon-soon winds and oceanic environments.Off the east coast of Vietnam,Chl-a concentration is a peak in August,a jet shape exten- ding 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 up-welling 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 re-search activities could be important for revealing spatial and temporal patterns of phytoplankton and their interactions with physical environments in the SCS.
Keywords:phytoplankton  biomass  chlorophyll-a  monsoon  upwelling  South China Sea
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