报告地点：第五教学楼5104（线上腾讯会议：264-508-398）
报告时间：星期三,2022-09-21 20:00 - 21:30
报告人：周永立（美国伍兹霍尔的海洋生物学实验室）
报告人简介：
Yongli Zhou is a marine biogeochemist focusing on carbon cycling. He grew up in a coastal city, Jiangmen, in the southern part of China. He holds a Bachelor's degree in Environmental Science and Engineering from the University of Science and Technology of China. Studying the biogeochemical fate of organic carbon from tropical peatlands in the coastal ocean, he earned his PhD from Nanyang Technological University in Singapore in 2021. He recently joined the Marine Biological Laboratory at Woods..
报告题目：Tracing Carbon in Coastal Ecosystems
报告内容简介
The biogeochemical fate of terrigenousorganic carbon at land-ocean interfaces is a critical issue because it cancause significant impacts on coastal ecosystems. In Southeast Asia, a hotspotof terrigenous organic carbon export from peatlands into the ocean, ourmulti-year field observation survey showed that 60 - 70% of this organic carbonflux is rapidly remineralized within the coastal waters. Photochemicaldegradation is a quantitatively important driver as revealed by our incubationexperiments and model simulation. This extensive remineralization of organiccarbon is causing a seasonal ocean acidification of an up to 0.15-unit drop inpH and fueling strong sea-to-air CO2 emissions in the region. To better predictcoastal carbon emissions, we are currently building a model representation forsoil biogeochemistry associated with tidal cycles, seasonality of salinity, andplant-mediated gas transport for tidal wetlands based on observation data fromthe Parker River estuary in northeast Massachusetts. This work will connect thesubsurface carbon biogeochemistry with the ecosystem-scale carbon fluxes andenable us to predict how these carbon fluxes will respond to future climatechange scenarios.