Modeling the reflectance spectra of tropical coastal waters
Modeling the reflectance spectra of tropical coastal waters
复制标题
模拟热带沿海水域的反射光谱
DOI：
10.1117/12.452820
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发表时间：
2002
影响因子：
13.5
通讯作者：
L. Kwoh
中科院分区：
文献类型：
--
作者：
Soo Chin Liew;A. S. Chia;Kim Hwa Lim;L. Kwoh
本工作旨在通过拟合反射光谱模型来提取具有高沉积物和叶绿素含量的近海海水的光学参数。1996年12月至1999年12月，在新加坡周围的沿海沃茨进行了海洋真相水取样活动。使用便携式光谱辐射计获得原位反射光谱。实验室测定了水样中的总悬浮固体（TSS）和叶绿素a（Chl-a）。叶绿素a浓度范围为1至90 mg/m3，平均值约为10 mg/m3。海水的三组分模型被用来模拟反射光谱。该模型还包括叶绿素荧光和表面反射由于天窗。通过找到最佳地将反射率曲线拟合到模式的一组拟合参数，将每个反射率光谱拟合到模型。采用单纯形法作为优化过程。叶绿素在440 nm处的吸收系数被检索，并发现相关的chl-A浓度的测量的幂律关系。
This work aims to extract optical parameters of coastal sea water with high sediment and chlorophyll content by fitting reflectance spectra to a model. Sea-truth water sampling campaigns were carried out from Dec 1996 to Dec 1999 in coastal waters around Singapore. In-situ reflectance spectra were acquired using a portable spectro radiometer. Laboratory measurements of the total suspended solid (TSS) and chlorophyll-a (Chl-a) were made from the water samples. The Chl-a concentration ranges from 1 to 90 mg/m3, with an average value of about 10 mg/m3. The three component model for sea water was used to model the reflectance spectra. The model also includes chlorophyll fluorescence and surface reflection due to skylight. Each reflectance spectrum is fitted to the model by finding a set of the fitting parameters that best fits the reflectance curve to the mode. The downhill simplex method is employed as the optimization procedure. The chlorophyll absorption coefficient at 440 nm is retrieved and is found to relate to the measured chl-A concentration by a power law relation.
影响因子：
1.9
作者：
SMITH, RC;BAKER, KS
通讯作者：
BAKER, KS