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在珠江口海域海洋光学浮标实验中获取一次聚生角毛藻赤潮生消过程的水体光学数据和相应的生化数据。利用该数据,分析了赤潮生消过程中水体光谱吸收和后向散射等光学性质的时间序列变化。研究发现,在赤潮生消过程中,浮游植物色素、非藻类颗粒物以及黄色物质等水体组分吸收变化显著,赤潮爆发期各组分光谱吸收增强并达到最大值,赤潮消亡期各组分光谱吸收降低并至最小值;赤潮爆发期与赤潮发展和消亡期相比,浮游植物的光谱吸收贡献增加约16%,黄色物质的吸收贡献减小约18%,而非藻类颗粒物的吸收贡献变化不大;赤潮爆发期后向散射系数明显增大,日变化幅度大,赤潮发展期和赤潮消亡期后向散射系数较小,赤潮消亡期后向散射系数降至最低;颗粒物后向散射系数与叶绿素a浓度的相关性优于悬浮物浓度。有机颗粒物浓度虽然在总颗粒物浓度中占主导地位,但是颗粒物后向散射与无机颗粒物的相关性更高。
In the Pearl River Estuary ocean optical buoy experiment to obtain a polygalaceae red tide redistribution process of water optical data and the corresponding biochemical data. Using this data, time series changes of optical properties such as spectral absorption and backscattering of water bodies during red tide generation were analyzed. The results showed that the absorption of phytoplankton pigment, non-algal particulate matter and yellow matter significantly changed during the red tide elimination. The spectral absorption of each component during the red tide burst increased and reached its maximum. Decreased to the minimum. Compared with the development and disappearance of red tide, the spectral absorption contribution of phytoplankton increased by about 16% and the absorption contribution of yellow material decreased by about 18%, while the absorption contribution of non-algal particles changed little ; After the red tide erupts the scattering coefficient increases obviously, the diurnal variation range is large, the postscale scattering coefficient of the red tide developing period and the red tide extinction period is small, the backward scattering coefficient reduces to the lowest after the red tide extinction period; the particle backscattering coefficient and chlorophyll a Concentration correlation is superior to the concentration of suspended solids. Although the concentration of organic particles dominates the total particulate concentration, the correlation of particulate backscatter with inorganic particulate matter is higher.