海洋学研究 ›› 2012, Vol. 30 ›› Issue (3): 41-48.

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南海海域浮游植物叶绿素与海表温度季节变化特征分析

林丽茹2, 赵辉*1   

  1. 1.国家海洋局 南海海洋工程勘察与环境研究院, 广东 广州 510300;
    2.广东海洋大学 广东省陆架及深远海气候、资源与环境重点实验室, 广东 湛江 524088
  • 收稿日期:2012-03-20 修回日期:2012-04-11 出版日期:2012-09-15 发布日期:2022-11-30
  • 通讯作者: *赵辉, 副研究员, huizhao1978@163.com
  • 作者简介:林丽茹(1980-), 女, 福建漳州市人, 硕士, 工程师, 主要从事海洋资源开发利用与保护工作。E-mail:llr_soa05@tom.com
  • 基金资助:
    国家自然科学基金资助项目(41006070, 41176028); 广东省自然科学基金资助项目(S2011010001001)

Analysis on the relations between Sea surface temperature and phytoplankton Chlorophyll-a in the South China Sea

LIN Li-ru1, ZHAO Hui2   

  1. 1. Key Laboratory of Continents-deep Sea Climate, Sources and Environments, Guangdong Ocean University, Zhanjiang 524088, China;
    2. The South China Sea Marine Engineering Survey and Environment Research Institute, SOA, Guangzhou 510300, China
  • Received:2012-03-20 Revised:2012-04-11 Online:2012-09-15 Published:2022-11-30

摘要: 利用 Sea WiFS卫星遥感叶绿素质量浓度及TRMM微波遥感海表温度产品, 研究了南海海表叶绿素a的季节变化特征及其同海表温度的关系。研究结果表明, 南海叶绿素质量浓度具有很强的季节变化:通常低叶绿素质量浓度(<0.12 mg·m-3)出现在弱风高海表温度(>28°C)的春、夏季节;高叶绿素质量浓度(>0.13 mg·m-3)通常出现在有较强风速和较低海表温度(<27°C)的冬季。线性回归分析显示, 南海叶绿素质量浓度同海表温度呈显著负相关。尽管在南海南部、南海中部、南海西部及吕宋西北部4个代表子区域的显著性有所差异, 但都暗示温度变化所反映的垂向层化调控了营养盐质量浓度和浮游植物量变化。可见, 温度可能是影响海洋上层稳定程度及垂向交换强度的重要指标, 从而可能调控营养盐及浮游植物的变化。

关键词: 南海, 叶绿素质量浓度, 海表温度, 季节变化

Abstract: Based on the Sea WiFS derived chlorophyll-a (Chl-a) mass concentration and TRMM sea-surface temperature data from September 1997 to February 2007 from the South China Sea (SCS), seasonal variations of Chl-a and its relationship with sea surface temperature (SST) were studied. The results show that the Chl-a mass concentration of the SCS has remarkable seasonal variability. Generally the lowest phytoplankton biomass (<0. 12 mg·m-3) occurs in spring or summer with low wind speed and high SST (>28 °C), while the highest Chl-a (>0. 16 mg·m-3) occurs in winter with the strongest monsoon wind and low SST (<27 °C). The linear regression analysis shows that Chl-a mass concentration has obvious negative correlations with SST. Though the correlations level is different for the 4 typical sub regions of the south, central, and west SCS and the northwest of the Luzon Strait, the consistent negative correlations imply that the Chl-a mass concentration and phytoplankton biomass are controlled by vertical stratification reflected by the temperature variation. The SST is a key factor influencing the upper ocean stability and the strength of vertical exchanges, and thus controlling the variations of nutrients and phytoplankton.

Key words: South China Sea, Chlorophyll-a, sea surface temperature, seasonal variation