Bio-optical properties as real-time tracers of organic matter transformation in the SML (SP 1.3)

海洋表面微层（SML）作为一个薄的边界层分隔水圈和大气。通常，特定化合物的浓度在SML中较高，这是由于下伏水的物理浓度、SML中的生产或大气沉积。一个众所周知的方面是，与底层散装水相比，SML中的发色溶解有机物（CDOM）浓度始终较高。最近，我们表明，固有的光学特性（IOP）-例如，水及其组分的光散射和吸收特性可用于扩展表征微层组分的能力，并为辐射传输和遥感相关研究提供有用的信息。此外，我们过去关于SML中光学特性的研究一直是我们提出使用IOP、表观光学特性（AOP）（来自光场的光谱辐射测量）以及荧光来表征有机物（OM）化合物及其转化以实时评估SML作为生物和化学栖息地的动机。这将使我们能够以特殊的方式研究SML中相关生物和化学驱动因素的短期动态。

The sea-surface microlayer (SML) as a thin boundary layer separates the hydrosphere and atmosphere. Often, concentrations of specific compounds are higher in the SML, either by physical concentration from the underlying water, production in the SML, or atmospheric deposition. A well-known aspect is the consistently higher concentration of chromophoric dissolved organic matter (CDOM) concentration in the SML as compared to the underlying bulk water. Recently, we showed that the inherent optical properties (IOP) –e.g., the light scattering and absorption characteristics of water and its constituents– of the SML can be used to extend the capabilities of characterizing components of the microlayer and provide useful information for radiative transfer and remote-sensing related studies. Further, our past research about optical properties in the SML has been our motivation to propose the use of IOPs, apparent optical properties (AOPs) –derived from spectral radiometric measurements of the light field¬– as well as fluorescence to characterize organic matter (OM) compounds and their transformation for the real-time assessment of the SML as a biological and chemical habitat. In an exceptional manner, this will allow us to study the short-time dynamics of relevant biological and chemical drivers in the SML.