东海赤潮高发区半分析算法色素浓度反演

Semi-Analysis Algorithm to Retrieve Pigment Concentrations in the Red Tide Area of the East China Sea

为研究赤潮机理和预测预报以减少其危害,根据2002-04东海赤潮调查航次实测资料,得出经验系数,建立方程,发展了东海赤潮高发海区的叶绿素a浓度反演半分析算法.由现场实测数据对算法进行检验,叶绿素a吸收系数aph(675)及浓度的反演结果误差基本在30%以内,其中浓度反演结果比较,均方根偏差为0.24,最大相对偏差为40.93%,平均相对偏差为18.83%,相关系数R2为0.83.从检验的结果来看,算法反演的精度较好,对于研究海区相对适用.

For the purpose of detecting and forecasting research of red tides to reduce the loss, a semi-analytic algorithm to retrieve chlorophyll-a concentrations was established in the area where red tides often brought out, according to the data collected during the red tides cruise in the East China Sea in April 2002. In the algorithm, empirical equations were made based on the coefficients from the in-situ data, including the optical properties of the research area. The in-situ data were used to validate the algorithm. The discrepancy of chlorophyll-a absorption coefficients and concentrations are mainly located in the region of 30%. The root mean deviation of the chlorophyll-a concentrations between the observed and the calculated is 0.24, the maximum relative deviation 40.93%, the mean relative deviation 18.83% and the correlation coefficient 0.83. The results show that the precision of the algorithm is high and the algorithm is fit for the research area.