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

海表面微层(SML)作为一层薄的边界层将水圈和大气分隔开来。通常，特定化合物在SML中的浓度较高，这无论是由于底层水的物理浓缩、SML中的生产，还是由于大气沉积。一个众所周知的方面是，与底层散装水相比，SML中的有色溶解有机物(CDOM)浓度一直较高。最近，我们发现，SML固有的光学特性(IOP)--例如水及其成分的光散射和吸收特性--可以用来扩展表征微层成分的能力，并为辐射传输和遥感相关研究提供有用的信息。此外，我们过去对SML中的光学属性的研究一直是我们建议使用IOPS、表观光学属性(AOPS)--来自光场的光谱辐射测量--以及荧光来表征有机物(OM)化合物及其转化的动机，以实时评估SML作为生物和化学生境的作用。以一种特殊的方式，这将使我们能够研究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.