OPTICAL MODELING OF THE UPPER OCEAN IN RELATION TO ITS BIOGENOUS MATTER CONTENT (CASE-I WATERS)
OPTICAL MODELING OF THE UPPER OCEAN IN RELATION TO ITS BIOGENOUS MATTER CONTENT (CASE-I WATERS)
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DOI：
10.1029/jc093ic09p10749
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发表时间：
1988-09-15
影响因子：
3.6
通讯作者：
MOREL, A
中科院分区：
文献类型：
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作者：
MOREL, A
本研究的目的是回顾和尝试性地解释海洋案例I沃茨的光学行为，这些沃茨的浮游植物及其衍生物在确定其光学特性中发挥主导作用。叶绿素类色素浓度被用作量化藻类物质（活的和碎屑）的指标，并研究该指标与真光层深度、下降流辐射衰减系数的光谱值或散射系数之间的统计关系。在这些统计关系的基础上，发展了一个依赖于色素的光学模型。它允许传播的可见光辐射能量的海洋或从上层的反向散射辐射被预测为当地的植物营养素含量的函数。其他地球物理或地球化学的应用是派生的，涉及加热率由于穿透可见光辐射或能量储存率由于光合作用。藻类生物量衰减关系中观察到的非线性趋势通过以下方式进行分析：（1）考虑生物-碎屑有机碳比率的相当有规律的变化，这似乎发生在从贫营养到富营养的海洋沃茨中，以及（2）考虑辐射能量衰减过程中吸收（色素细胞）和散射（所有种类的颗粒）的各自贡献。
The aim of the present study is to review and tentatively to interpret the optical behavior of oceanic case I waters, those waters for which phytoplankton and their derivative play a predominant role in determining their optical properties. Chlorophyll‐like pigment concentration is used as the index to quantify the algal material (living and detrital), and statistical relationships between this index and the depth of the euphotic layer, the spectral values of the attenuation coefficient for downwelling irradiance, or the scattering coefficient are investigated. On the basis of these statistical relationships a pigment‐dependent optical model is developed. It allows the propagation of the visible radiant energy within the ocean or the backscattered radiation from the upper layer to be predicted as a function of the local phytoplanktonic content. Other geophysical or geochemical applications are derived which concern the heating rate due to penetrating visible radiations or the rate of energy storage due to photosynthesis. The nonlinear trends observed in the algal biomass‐attenuation relationships are analyzed by (1) considering the rather regular change of the living‐to‐detrital organic carbon ratio which seems to occur in oceanic waters ranging from oligotrophic to eutrophic, and (2) accounting for the respective contributions of absorption (by pigmented cells) and of scattering (by all kind of particulates) in the attenuation process of radiant energy.