2021年全球重点区域内陆水体黄色物质

有色可溶性有机物（CDOM），又称为黄色物质，是DOM中能强烈吸收紫外辐射和蓝光的那部分物质，能显著影响水下光场及水体中碳氮磷等生源要素的生物地球化学循环。CDOM主要由腐殖酸、富里酸和芳烃聚合物等物质组成的可溶性有机混合物，有效监测CDOM浓度对于评价水生环境DOM的相关水平和空间分布具有重要意义。本数据集采用ag(254)以表征水样中CDOM，基于Sentinel2A/B传感器数据和随机森林回归算法生产的全球重点区域季度水体有色可溶性有机物产品。包含区域：京津冀、长三角、珠三角、斯里兰卡、印第安纳。

Colored Dissolved Organic Matter (CDOM), also known as yellow substance, is the fraction of Dissolved Organic Matter (DOM) that strongly absorbs ultraviolet radiation and blue light, and significantly affects the underwater light field and the biogeochemical cycles of biogenic elements such as carbon, nitrogen and phosphorus in water bodies. CDOM is a soluble organic mixture mainly composed of humic acid, fulvic acid, aromatic polymers and other substances. Effective monitoring of CDOM concentration is of great significance for evaluating the relevant levels and spatial distribution of DOM in aquatic environments. This dataset uses ag(254) to characterize CDOM in water samples, and produces global key regional quarterly aquatic colored dissolved organic matter products based on Sentinel-2A/B sensor data and random forest regression algorithm. Included regions: Beijing-Tianjin-Hebei region, Yangtze River Delta, Pearl River Delta, Sri Lanka, and Indiana.