| 摘要: |
| 为了解南海南部海域不同水团对悬浮体分布特征的影响, 于2012 年4～5 月在南海南部海域的80 个测站分层采集了悬浮体水样, 并现场测量各站位200 m 以浅水体剖面上的悬浮体浓度、粒径、水体浊度、叶绿素a 浓度以及温度、盐度等数据。分别选取受中南半岛沿岸混合水、南部陆架水、苏禄海与本地海水的混合水、南沙中央表层水等4 个水团影响的多个典型站位数据, 分析各水团悬浮体组分和分布特征。结果表明, 南海南部海域悬浮体含量很少, 浓度较小, 均值为2.96 μL/L; 悬浮体主要组分为生源大颗粒, 其粒径多在100 μm 以上, 另有少量无机矿物碎屑, 其粒径大部分小于32 μm。巽他陆架北缘浅水区受南部陆架水控制, 并且受到局地上升流的影响, 陆源物质和生源物质含量均较多,导致其悬浮体浓度在4 个水团中最高。苏禄海与本地海水混合水中悬浮体分布主要受浮游植物的影响。中南半岛沿岸混合水中悬浮体含较多陆源物质。南沙中央表层水受陆源物质影响很小, 悬浮体主要由生源物质组成, 且其浓度较小。 |
| 关键词: 悬浮体 分布特征 物源 水团 南海南部 |
| DOI：10.11759/hykx20130423003 |
| 分类号: |
| 基金项目:中国科学院战略性先导科技专项(A 类, XDA11030103) |
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| Distribution characteristics and provenance of suspended matter in upper water of the southern South China Sea during the spring of 2012 |
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| Abstract: |
| In order to study the impact of different water masses from the southern South China Sea (SCS) on distribution characteristics of suspended matter, we collected the water samples of the southern SCS in April and May, 2012, and measured the volume concentration of the suspended particulate matters (SPM), Chlorophyll concentration, turbidity, temperature and salinity. Typical stations under the influence of different water masses (including the shelf water in the north rim of the Sunda Shelf, the mixed water in the west side on the Balabac Strait of the local seawater and the water from the Sulu Sea, the Nansha central surface water and the mixed water from the coast of the Indo-China Peninsula) have been selected to analyze the composition and the distribution characteristics of the SPM in different water masses. The results showed that the volume concentration in the survey area was low (mean 2.96 μL/L) and the SPM in the ocean were mainly composed of biogenic particles with a particle size of more than 100 μm. In addition, a small amount of inorganic mineral debris. Most of the particle size was less than 32 μm. The SPM of shallow water in the north edge of the Sunda Shelf has the highest volume concentration and contained more terrigeneous matter and biogenicmaterial due to the influence of shelf water and the upwelling. The SPM of the mixed water from the Sulu Sea and the southern SCS is mainly influenced by phytoplanktons. The SPM from the area affected by the mixed water from the coast of the Indo-China Peninsula contains more terrigenous matters, whereas terrigenous matters have less impact on the SPM of the Nansha central surface water which are mainly composed of biogenicmateria. |
| Key words: suspended particulate matter (SPM) distribution characteristics provenance analysis water mass the Southern South China Sea |
