Monitoring the Dissipation of the Floating Green Macroalgae Blooms in the Yellow Sea (2007–2020) on the Basis of Satellite Remote Sensing

Large scale green macroalgae blooms (MABs) caused by Ulva prolifera have occurred regularly in the Yellow Sea since 2007. In MAB dissipation phase, landing or sinking and decomposition of U. would alter physical-chemical environment seawater cause ecological, environmental, economic problems. To understand features, we used multiple sensors to analyze spatiotemporal variation phase southern Sea. The results show daily rate (DR) was inconsistent from year year. Based on DR variation, a simple method estimating days proposed for first time. Verification method, 2018 2020, showed estimated were relatively consistent with obtained remote sensing imagery. From 2007 order which landed coastal cities Shandong Peninsula can be roughly divided into two types. one type, Rizhao, followed Qingdao, Rushan, Haiyang. other they reverse order. MABs annual distribution density significant differences These provided basis evaluating MABs’ impact marine ecology formulating green-tide prevention control strategies.