基于SCHISM-CoSiNE模拟的2021年珠江口海域海表浮游植物分布OA北大核心CSTPCD

To explore the distribution of phytoplankton in weak runoff condition,a three-dimensional baroclinic hydrodynamic-ecological coupled model(Semi-implicit Cross-scale Hydroscience Integrated System Model coupled with Carbon,Silicon,Nitrogen Ecosystem,SCHISM-CoSiNE)for the Pearl River Estuary based on an unstructured grid semi-implicit cross-scale ocean model has been established.The distribution of sea surface state variables in the Pearl River Estuary under weak runoff condition in 2021 has been discussed based on the model results.We explore the spatial correlation between key marine factors and daily runoff,and conduct an Empirical Orthogonal Function(EOF)analysis of sea surface chlorophyll-a.The results show that chlorophyll-a concentration from late June to August exhibits negative anomalies compared to the multi-year average.A contrasting phase of chlorophyll-a concentration distribution is observed offshore and in the open sea.Offshore chlorophyll-a increases during the wet season and decreases during the dry season,opposite change has been observed in the open sea.Notably,the significant difference between the 2021 results and the multi-year mean focuses on the opposite time coefficient of the third EOF mode in August and September.Overall,the phytoplankton distribution in 2021 aligns with the normal pattern.