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Results of a Monte Carlo investigation of the diffuse attenuation coefficient

机译：蒙特卡罗研究扩散衰减系数的结果

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There has been a largo effort to relate the apparent optical properties of ocean water to the inherent optical properties, which are the absorption coefficient a, the scattering coefficient b, and the scattering phase function p(θ). The diffuse attenuation coefficient k_(diff) has most often been considered an apparent optical property. However, k_(diff) can be considered a quasi-inherent property k_(diff) when defined as a steady-state light distribution attenuation coefficient. The Honey-Wilson research empirically relates k_(diff) to a and b. The Honey-Wilson relation most likely applies to a limited range of water types because it does not include dependence on p(θ). Aseriea of Monte Carlo simulations were initiated to calculate k_(diff) in an unstratified water coldumn. The calculations, which reflected open ocean water types, used ranges of the single-scattering albedo ω_(D) and the mean forward-scattering angle ω_(m) for two analytic phase functions with different shapes. It was found that k_(diff)' is nearly independent of the shape of p(θ) and can be easily parameterized in terms of a, b, and θ_(m) for 0.11 ≤ θ_(m) ≤ 0.48 rad and 0.5 ≤ ω_(U) ≤ 0.95. k_(diff)' is an asymptotic quantity, that is, a steady-state distribution is reached only after many scattering lengths.
机译：已经进行了很大的努力，以将海水的表观光学性质与固有光学性质相关联，所述固有光学性质是吸收系数a，散射系数b和散射相位函数p（θ）。漫射衰减系数k_（diff）最常被视为表观光学特性。然而，当k_（diff）被定义为稳态光分布衰减系数时，可以被认为是准固有特性k_（diff）。 Honey-Wilson研究根据经验将k_（diff）与a和b相关。 Honey-Wilson关系很可能适用于有限范围的水类型，因为它不包括对p（θ）的依赖。开始进行蒙特卡洛模拟的Aseriea，以计算未分层水冷系数中的k_（diff）。这些计算反映了开阔海洋水的类型，使用了具有不同形状的两个解析相位函数的单散射反照率ω_（D）的范围和平均前向散射角ω_（m）。发现k_（diff）'几乎与p（θ）的形状无关，并且对于0.11≤θ_（m）≤0.48 rad和0.5≤可以很容易地根据a，b和θ_（m）进行参数化ω_（U）≤0.95。 k_（diff）'是一个渐近量，即，仅在许多散射长度后才达到稳态分布。

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