报告题目：大西洋深海沉积物中碳酸钙分布的系统性阐释
报告人：罗一鸣（中山大学）
报告人简介：
罗一鸣，中山大学海洋科学学院教授，研究兴趣为海洋地质和海洋化学。2013年在加拿大不列颠哥伦比亚大学获得博士学位；2013至2016年间先后在加拿大达尔豪斯大学和挪威卑尔根大学从事海洋学研究。2016年加盟中山大学，正在开展的研究主要包括：1）基于理论和实践两方面的手段, 探索海洋铀系天然放射性同位素的分布机制，2）海洋碳和营养盐循环；3）古海洋沉积及陆地到海洋的物质传输。已经在包括Nature Geoscience, Nature Communications, Earth Planet. Sci. Lett., Geophys. Res. Lett.等地学和海洋学主流杂志上发表论文20多篇。
报告内容简介：
Deep sea calcium carbonate is closely coupled to the neutralization of anthropogenic CO2 in the oceans over timescales of hundreds to millions of years. To quantify the neutralization capacity of the calcite at the seafloor, we need a systematic understanding of the distribution pattern of sedimentary CaCO3 in the deep ocean. A compilation of core-top CaCO3 data in the Atlantic Ocean (50ºN-50ºS) is re-analyzed using a recently developed carbonate dynamics model,. The controlling effects of submarine topography, ocean productivity, deep ocean circulation, lithogenic dilution on sedimentary CaCO3 distribution are quantitatively evaluated. It enables a basin-specific analysis on the ruling mechanisms of the carbonate chemistry in 11 ocean basins. Those ocean basins follow the same oceanic carbonate saturation or compensation law but exhibit distinctive mechanisms with respect to the distribution of calcium carbonate in surface sediments.
报告时间：11月1日周五15:00-17:00
报告地点：海洋楼一楼报告厅
邀请人：杨守业教授