浮游植物和黄色物质是影响海洋生态系统与光学特性的两个重要组分，两者的相关性在一定程度上体现了颗粒有机碳与溶解有机碳之间的相互关系以及黄色物质的源汇机制。.由于观测数据的缺乏，大洋水体中黄色物质的主要来源是浮游植物直接产生还是微生物降解产生仍然存在一定争议，关于西北太平洋表层黄色物质与叶绿素a之间负相关关系的成因尚无定论。.生物Argo是集成各种生物光学与生物地球化学传感器的新型自持式剖面浮标，它极大地弥补了船基测量时空分辨率低的缺陷和卫星遥感无法观测深层海洋的不足，对未来的海洋观测与研究将产生巨大的影响。.本项目利用即将投放在西北太平洋的14台生物Argo浮标数据，结合船载调查与卫星遥感观测，分析该海区浮游植物与黄色物质的相关性并探讨其成因，发展黄色物质的一维模型，评价不同源汇过程的贡献，揭示黄色物质的主要来源。研究结果有助于进一步认识西北太平洋的生物光学特性、生态系统特征以及碳循环过程。

Phytoplankton and colored dissolved organic matter (CDOM) are two of important components impacting on the ocean ecosystems and optical properties, their correlation to some extent reflects the relationship between particle organic carbon (POC) and dissolved organic carbon (DOC), as well as the source-sink mechanism of CDOM..Due to lack of observation data, there still exists a debate on the main source of CDOM in the open ocean, which is phytoplankton direct production or bacterial degradation production. Besides, there is not a convincing explanation on the cause of weak negative correlation between CDOM and chlorophyll-a in the northwestern Pacific..As a novel autonomous profiling float integrated with various bio-optical and biogeochemical sensors, Bio-Argo fills the gap between ship-based measurements with low spatiotemporal resolutions and satellite remote sensing that cannot observe vertical distributions, playing an important role in future observational strategy and oceanographic research. .Based on the data of 14 Bio-Argo floats which are going to be deployed in the northwestern Pacific, as well as on the ship-based measurements and satellite remote sensing data, this project will analyze the correlation between phytoplankton and CDOM, as well as its causes, improve CDOM one dimensional model, evaluate the distributions of different sources and sinks, and reveal the main sources of CDOM within different layers. The expected results will be helpful to a better understanding of regional bio-optical properties, ecosystem features and carbon cycle processes in the northwestern Pacific.