The coloured dissolved organic matter (CDOM) pool was studied to provide information about the characteristics and dynamics of the dissolved organic carbon (DOC) fraction in the largest contiguous coral reef system in the world, the Great Barrier Reef, Australia. The large-scale dataset consisted of 793 discrete measurements collected in offshore and coastal regions in the period from 2004 to 2017. The study demonstrates that despite spatial-temporal variations, the CDOM values in the Great Barrier Reef are comparable to those found in other oligotrophic coastal waters. The CDOM optical properties suggest a higher terrestrial contribution and low photochemical degradation of CDOM during the Austral wet season, which is in line with the higher river inputs and overcast conditions during this period compared with the other seasons. The study also revealed a strong relationship between the DOC normalized CDOM absorption coefficient at 350 nm and the spectral slope between 275 nm and 295 nm (S_275-295), suggesting that the correlation between DOC and CDOM varies depending on the DOC properties or source. The poor relationship between CDOM and salinity could be explained by a range of factors, but is likely primarily linked with the extensive photochemical degradation and generally low river inputs in the Great Barrier Reef.

对有色溶解有机物（CDOM）库进行了研究，以提供有关世界上最大的连续珊瑚礁系统澳大利亚大堡礁中溶解有机碳（DOC）组分的特征和动态的信息。大规模数据集由2004年至2017年期间在近海和沿海地区收集的793个离散测量组成。研究表明，尽管时空变化，大堡礁的CDOM值与其他富营养化地区的CDOM值相当沿海水域。CDOM的光学性质表明，在南方的雨季期间，CDOM的陆地贡献较高，光化学降解较低，这与该季节相比其他季节相比，在此期间较高的河流投入量和阴雨条件相符。_275-295），这表明DOC和CDOM之间的相关性随DOC属性或来源而变化。CDOM与盐度之间的不良关系可以用多种因素来解释，但可能主要与大堡礁的广泛光化学降解和普遍较低的河流投入有关。