北部湾浮游植物叶绿素及颗粒无机碳的时空分布特征

发布时间：2018-03-20 17:19

本文选题：北部湾　切入点：浮游植物　出处：《广东海洋大学》2015年硕士论文　论文类型：学位论文

【摘要】：海洋自养生物是海洋食物链的基础,也是主要的海洋初级生产者,给海洋提供了约50%的净初级生产量,并通过海洋浮游植物光合作用影响大气中CO2的含量。本文使用卫星遥感数据研究北部湾浮游植物的时间和空间分布特征,并进一步探讨了浮游植物对海洋环境变化的影响。北部湾浮游植物叶绿素和颗粒无机碳存在明显的季节变化和空间分布特征,研究结果表明北部湾浮游植物叶绿素的这种时空分布格局同反转季风、海表温度、气溶胶光学厚度、潮汐、河流及陆地径流等有密切关系。研究显示,整个北部湾颗粒无机碳浓度与海表面风速存在较好的对应关系,二者呈显著正相关(R=0.81,P0.05);与温度呈较好的负相关关系(R=-0.35,P0.05)。进而对北部湾3个典型区域研究显示:(1)北部湾中部海域(区域A),浮游植物叶绿素/颗粒无机碳浓度同气溶胶光学厚度(R=0.5,P0.05)/(R=0.4,P0.05)、风场(R=0.5,P0.05)/(R=0.52,P0.05)呈显著的正相关关系;(2)雷州半岛西部沿岸海域(区域B),浮游植物叶绿素/颗粒无机碳浓度与气溶胶光学厚度(R=0.3,P0.05)/(R=0.07,P0.05)、风场(R=0.03,P0.05)/(R=0.3,P0.05)呈一定正相关,且与风速的相关性较弱;(3)海南岛西部沿岸海域(区域C),浮游植物叶绿素/颗粒无机碳浓度与气溶胶光学厚度(R=0.2,P0.05)/(R=0.015,P0.05)、风场(R=0.5,P0.05)/(R=0.5,P0.05)呈正相关关系。综合分析表明,北部湾中部海域主要受气溶胶沉降影响,叶绿素浓度最大值出现在冬季可能同该区域冬季气溶胶沉降最强有关(R=0.5,P0.05);雷州半岛西部沿岸海域高叶绿素与冬季此处强的东北季风以及潮汐混合引起有关;海南岛西部沿海海域全年高叶绿素与强的季风以及河口携带的营养盐的输入有关。总之,北部湾浮游植物的时空变化特征与季风、海表温度、气溶胶光学厚度、潮汐、河流及陆地径流等有密切有关。
[Abstract]:Marine autotrophic organisms form the basis of the marine food chain and are major marine primary producers, providing the oceans with about 50% net primary production. In this paper, the temporal and spatial distribution of phytoplankton in Beibu Gulf was studied by using satellite remote sensing data. The effects of phytoplankton on marine environmental change were further discussed. The seasonal variation and spatial distribution of chlorophyll and particulate inorganic carbon in phytoplankton of Beibu Gulf were obvious. The results show that the spatial and temporal distribution of phytoplankton chlorophyll in Beibu Gulf is closely related to reverse monsoon, sea surface temperature, aerosol optical thickness, tide, river and land runoff. There is a good relationship between the concentration of inorganic carbon in the whole Beibu Gulf and the wind speed on the sea surface. There was a significant positive correlation between them and a good negative correlation with temperature. The results showed that the concentration of chlorophyll / particulate inorganic carbon of phytoplankton was the same as aerosol in three typical regions of Beibu Gulf. The results showed that the concentration of chlorophyll / particulate inorganic carbon of phytoplankton was the same as that of aerosol. There was a significant positive correlation between the thickness of RX 0.5N / P 0.05N P 0.05 and the wind field of 0.5g / P 0.05N / P 0.52g P 0.05) in the western coastal waters of Leizhou Peninsula (regional BU, concentration of phytoplankton chlorophyll / particulate inorganic carbon and aerosol optical thickness (R0.3P0.05 / P 0.05), and wind field R0. 03P0. 05 / R0. 3P0. 05), and there was a positive correlation between the concentration of phytoplankton chlorophyll / particulate inorganic carbon and aerosol optical thickness (R0. 07P0. 05), and the wind field was 0. 03P0. 05 / R0. 3P0. 05), and there was a positive correlation between R0. 03P0. 05 and aerosol optical thickness. There was a positive correlation between the concentration of chlorophyll / particulate inorganic carbon of phytoplankton and aerosol optical thickness (R ~ (0.2) / P ~ (0.05) P ~ (0.05) P ~ (0.05)) and wind field (r ~ (0.5) P ~ (0.05) P ~ (0.05) / P ~ (0.5) P ~ (0.05)) in the western coastal waters of Hainan Island. The comprehensive analysis showed that the concentration of chlorophyll / particulate inorganic carbon in phytoplankton was positively correlated with the aerosol optical thickness (R ~ (0.2) / P ~ (0.05) P ~ (0.05)). The central sea area of the Beibu Gulf is mainly affected by aerosol deposition. The maximum chlorophyll concentration in winter may be related to the strongest aerosol deposition in winter in this region, and the high chlorophyll concentration in the western coastal waters of Leizhou Peninsula is related to the strong northeast monsoon and tidal mixing in winter. The annual high chlorophyll content in the coastal waters of the western part of Hainan Island is related to the strong monsoon and the input of nutrients carried by the estuary. In short, the temporal and spatial variation characteristics of phytoplankton in the Beibu Gulf are related to the monsoon, sea surface temperature, aerosol optical thickness, and tide. Rivers and land runoff are closely related.
【学位授予单位】：广东海洋大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P734

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