An overview of approaches and challenges for retrieving marine inherent optical properties from ocean color remote sensing.
An overview of approaches and challenges for retrieving marine inherent optical properties from ocean color remote sensing.
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DOI：
10.1016/j.pocean.2018.01.001
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发表时间：
2018
影响因子：
4.1
通讯作者：
P. J. Werdell;L. McKinna;E. Boss;S. Ackleson;Susanne E. Craig;Susanne E. Craig;W. Gregg;Z. Lee-
中科院分区：
文献类型：
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作者：
P. J. Werdell;L. McKinna;E. Boss;S. Ackleson;Susanne E. Craig;Susanne E. Craig;W. Gregg;Z. Lee-
从卫星上测量的海洋颜色提供了每天全球的光谱离水反射率的天气视图，可用于生成海洋固有光学特性（IOPs）的估计。这些反射率，即光谱上涌辐射与光谱下涌辐射的比率，描述了离开水团的光，定义了水团的颜色。IOPs是海水及其溶解和颗粒成分的光谱吸收和散射特性。由于其依赖于海洋成分的浓度和组成，IOPs可以用来描述海洋上层混合层的内容。这些信息对于我们进一步科学了解海洋生物地球化学过程至关重要，例如有机碳的产生和输出、浮游植物动态以及对气候扰动的反应。鉴于其重要性，国际海洋水色界在区域和全球范围内投入了大量精力来提高卫星衍生IOP产品的质量。认识到目前大量数据产品涌入社区，需要改进目前的算法，以期待新的卫星仪器（例如，全球，高光谱光谱辐射计的NASA浮游生物，气溶胶，云，海洋生态系统（PACE）的使命），我们提出了一个概要的当前状态的艺术在这些核心光学特性的检索。从卫星海洋颜色获得IOP的当代方法进行审查，并为清楚起见，分离基于他们的反演方法或类型的IOP寻求。与每种方法相关的已知不确定性的摘要，以及用于评估它们的常见性能指标。我们讨论了目前的知识差距，并提出建议，为未来的投资，即将到来的任务，其仪器的特性偏离足够的遗产和现有的传感器，以保证重新评估目前的方法。
Ocean color measured from satellites provides daily global, synoptic views of spectral water-leaving reflectances that can be used to generate estimates of marine inherent optical properties (IOPs). These reflectances, namely the ratio of spectral upwelled radiances to spectral downwelled irradiances, describe the light exiting a water mass that defines its color. IOPs are the spectral absorption and scattering characteristics of ocean water and its dissolved and particulate constituents. Because of their dependence on the concentration and composition of marine constituents, IOPs can be used to describe the contents of the upper ocean mixed layer. This information is critical to further our scientific understanding of biogeochemical oceanic processes, such as organic carbon production and export, phytoplankton dynamics, and responses to climatic disturbances. Given their importance, the international ocean color community has invested significant effort in improving the quality of satellite-derived IOP products, both regionally and globally. Recognizing the current influx of data products into the community and the need to improve current algorithms in anticipation of new satellite instruments (e.g., the global, hyperspectral spectroradiometer of the NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission), we present a synopsis of the current state of the art in the retrieval of these core optical properties. Contemporary approaches for obtaining IOPs from satellite ocean color are reviewed and, for clarity, separated based their inversion methodology or the type of IOPs sought. Summaries of known uncertainties associated with each approach are provided, as well as common performance metrics used to evaluate them. We discuss current knowledge gaps and make recommendations for future investment for upcoming missions whose instrument characteristics diverge sufficiently from heritage and existing sensors to warrant reassessing current approaches.