**5. Conclusion**

This research analyzes the variation of the CDOM optical properties (absorption) in the PRE based on the in-situ measurements during a spring cruise survey and the ocean color interpretations. Based on a UV to visible scheme to retrieve CDOM absorption from remote sensing reflectance, the time-series product of CDOM absorption in the PRE waters is produced from satellite images with multiple spatial and spectral resolutions, and an evident correlation with the temporal variation of river discharge is captured in the time-series variation of CDOM absorption in the PRE in spring.
