长江口及邻近海域水体反射率的模拟

洪官林; 沈芳; 沈宏

长江口及邻近海域水体反射率的模拟

1.
华东师范大学河口海岸学国家重点实验室,上海 200062

详细信息

中图分类号: P733
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- 被引次数: 0
出版历程
- 收稿日期: 2011-02-01
- 修回日期: 2011-05-01
- 刊出日期: 2012-01-25

Modeling of seawater reflectance in the Yangtze Estuary and the adjacent sea

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

摘要

摘要: 通过对2009年8月和11月水体光学特性的分析发现：长江口邻近海域夏秋两季反射光谱曲线由于悬浮泥沙、浮游植物以及黄色物质的影响呈现4种形状；叶绿素a浓度与浮游植物吸收系数可通过两种方式建立良好关系；将水体各组分光学特性参数化，并结合叶绿素a浓度与吸收系数的两种关系分别建立水体反射光谱参数模式，从而可以对水体遥感反射光谱进行模拟，模拟曲线的均方根误差分别为0.004 4和0.004 5.在模式的建立中，根据长江口海域水体组分浓度的分布状况，对悬浮泥沙浓度以及叶绿素a浓度进行分类，得到不同水体组分浓度下反射率光谱曲线；然后分别获得模式参数并进行模拟，得到的反射率模拟曲线与实测相对均方根误差为0.003 5，具有更高的模拟精度.
- 遥感反射率 /
- 吸收系数 /
- 散射系数 /
- 模拟 /
- 长江口
Abstract: The optical properties of the Yangtze Estuarine waters were discussed based on two investigations conducted respectively in August and November of 2009. It was found that the water-leaving reflectance spectra in August and November presented four types caused by different chlorophyll-a concentrations, suspended sediment concentrations and colored dissolved organic matters (CDOM). The relationships between chlorophyll-a concentration and absorption coefficient of the pigment particles were built by two ways, and two models used to simulate the reflectance spectra were established by using the parameterized optical properties, the RMSE of these models being 0.004 4 and 0.004 5, respectively. The accuracy of the model can be improved by classifying the concentrations of chlorophyll-a and suspended sediment, the RMSE was improved to 0.003 5.
- remote sensing reflectance /
- absorption coefficient /
- scattering coefficient /
- modeling /
- Yangtze Estuary

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参考文献(1)

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