报告时间：2018. 10.10 (周三) 上午10:00-11:30
报告地点：天津大学第16教学楼221
主讲嘉宾：包锐 博士
嘉宾简介：
包锐 博士，2005年本科毕业于中国地质大学。之后在国土资源部广州海洋地质调查局工作3年。2010年在中国地质大学获得硕士学位。 2015年在美国伍兹霍尔海洋研究所访问学习半年。2016年毕业于瑞士苏黎世联邦理工学院地质系，获得博士学位，师从英国皇家学会院士Timothy Eglinton教授，随后获得瑞士自然科学基金资助在美国哈佛大学地球与行星科学系从事土壤碳循环的研究工作。包锐博士在海洋有机碳循环领域取得了重要的研究成果，其中以第一作者兼通讯作者在Nature Communications, Geology, Global Biogeochemical Cycles，Geophysical Research Letters等期刊上发表多篇论文。包锐博士是国际大洋钻探计划（IODP) 南中国海航次有机地球化学家；包锐博士还是多家海洋学领域国际期刊的审稿人（如，Limnology and Oceanography等）。
报告简介:
Understanding the origin and fate of organic carbon on continental shelves has been a long-standing issue that has garnered the attention of many geoscientists. Investigations on the carbon isotopic characteristics of organic matter in marine sediment provide important constraints on the functioning of the carbon cycle, with radiocarbon (14C) serving as a key tool for studying carbon cycle processes in contemporary oceans. The 14C age of organic matter accumulating in sediments on continental margins can shed light on processes that are involved in carbon cycling in the dynamic marine environments. However, it has proven challenging to constrain the role of hydrodynamic processes on observed 14C ages of bulk organic matter. Here, I launched a detailed 14C-based investigation on thermally-resolved organic carbon fractions and specific biomarkers across a spectrum of grain size fractions of continental shelf sediments. My results show that hydrodynamic processes are a key modulator of organic carbon dynamics during lateral transport of sedimentary organic matter, which functions as an “aging factory”. The aging of organic matter during across-shelf transport emerges as a widespread phenomenon, comprising an important facet of the marine carbon cycle. Moreover, my works reveal translocation and burial of the aged organic carbon into hadal environment, shedding new light on the nature and dynamics of organic carbon supply to deep ocean.
