Lee Z, Carder K L, Hawes S K, Steward R G, Peacock T G, Davis C O
Appl Opt. 1994 Aug 20;33(24):5721-32. doi: 10.1364/AO.33.005721.
Remote-sensing reflectance is easier to interpret for the open ocean than for coastal regions because the optical signals are highly coupled to the phytoplankton (e.g., chlorophyll) concentrations. For estuarine or coastal waters, variable terrigenous colored dissolved organic matter (CDOM), suspended sediments, and bottom reflectance, all factors that do not covary with the pigment concentration, confound data interpretation. In this research, remote-sensing reflectance models are suggested for coastal waters, to which contributions that are due to bottom reflectance, CDOM fluorescence, and water Raman scattering are included. Through the use of two parameters to model the combination of the backscattering coefficient and the Q factor, excellent agreement was achieved between the measured and modeled remote-sensing reflectance for waters from the West Florida Shelf to the Mississippi River plume. These waters cover a range of chlorophyll of 0.2-40 mg/m(3) and gelbstoff absorption at 440 nm from 0.02-0.4 m(-1). Data with a spectral resolution of 10 nm or better, which is consistent with that provided by the airborne visible and infrared imaging spectrometer (AVIRIS) and spacecraft spectrometers, were used in the model evaluation.
对于开阔海洋而言，遥感反射率比沿海地区更容易解释，因为光信号与浮游植物（如叶绿素）浓度高度相关。对于河口或沿海水域，陆源有色溶解有机物（CDOM）、悬浮沉积物和海底反射率的变化，这些与色素浓度无关的所有因素都会混淆数据解释。在本研究中，提出了适用于沿海水域的遥感反射率模型，其中包括了海底反射率、CDOM荧光和水拉曼散射的贡献。通过使用两个参数对后向散射系数和Q因子的组合进行建模，从西佛罗里达陆架到密西西比河羽流的水域实测和模拟的遥感反射率之间取得了极好的一致性。这些水域的叶绿素含量范围为0.2-40mg/m³，440nm处的黄色物质吸收系数为0.02-0.4m⁻¹。模型评估中使用了光谱分辨率为10nm或更好的数据，这与机载可见和红外成像光谱仪（AVIRIS）和航天器光谱仪提供的数据一致。
