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Optical properties of colored dissolved organic matter in the Northern Gulf of Mexico

机译：墨西哥北部湾有色溶解有机物的光学性质

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摘要

Variations in the concentration and inherent optical properties of colored dissolved organic matter (CDOM) in river-dominated margins provide information on the cycling of carbon and its chemical composition. Large-scale temporal and spatial variability in CDOM concentration and optical properties were observed in the Northern Gulf of Mexico in June of 2000 and April of 2001. Terrestrial CDOM from the Mississippi and Atchafalaya Rivers dominates the region. Although the primary factor controlling CDOM in this region is the quantity of fresh water runoff, strong regional variability in fresh water sources also plays a major role. Physical complexity due to changes in circulation patterns, volume of river flow and multiple river sources makes observation of biological and photochemical effects challenging in this region. We have used two approaches to distinguish between source and transformation effects: mixing models, which include the concentration and inherent optical properties of CDOM from discrete samples, and high-resolution three-dimensional mapping of multi-spectral fluorescence.
机译：河流占优势的边缘中有色溶解有机物（CDOM）的浓度和固有光学性质的变化提供了有关碳循环及其化学成分的信息。在2000年6月和2001年4月，在墨西哥北部海湾观察到CDOM浓度和光学性质的大规模时空变化。该地区主要来自密西西比河和Atchafalaya河的陆地CDOM。尽管控制该区域CDOM的主要因素是淡水径流的数量，但淡水源的强烈区域差异也起着重要作用。由于循环模式，河流流量和多种河流源的变化而造成的物理复杂性，使得对该地区生物和光化学效应的观察变得具有挑战性。我们使用了两种方法来区分源效应和转换效应：混合模型，其中包括来自离散样品的CDOM的浓度和固有光学特性，以及多光谱荧光的高分辨率三维映射。

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