Impact of Marine Heatwaves on Chlorophyll-a variability using Geostationary Ocean Color Imager (GOCI)

摘要

Using the world’s first ocean color sensor at a geostationary orbit (Geostationary Ocean Color Imager; GOCI), weexamine the relationship between satellite-derived chlorophyll-a concentration and MH events over the East China Seaduring recent summers from 2016 to 2018. MH events usually arise in July and August over the study domain. Whencompared with the average of three days before and after MH events, the chlorophyll-a concentration since MH eventoccurrence tends to decrease from GOCI satellite images. Previous studies mentioned that the increased sea surfacetemperature (SST) enhances the stratification in upper ocean surface layer. Strong stratification derives the weakupwelling and the limited supply of nutrients from the deep to surface. These preliminary results show a possibility ofreal-time application of the geostationary ocean color satellite images for an immediate change in marine ecosystemcaused by the extreme ocean warming event.