Abstract：
Dissolved organic matter (DOM) stored on Earth contributes the largest flux of organic carbon from land to oceans worldwide. The large DOM pool links organic carbon with CO2 and drives the global carbon cycle since it is believed that the short- to medium- term fate of DOM is conversion to greenhouse gases, such as CO2 and CH4. I will elaborate some of the new insights learned over the last few years, showing that a significant portion of terrestrial DOM can sustain during the transport from land to the Ocean, rather than being completely respired to CO2. Owing to the recent advances in analytical techniques in the field of environmental chemistry and geochemistry, we are capable of closely examining the molecular rearrangement of DOM upon photoirradiation, potentially by reactive oxygen species, to form molecularly unrecognizable organic molecules such as humic substances. Ongoing and future studies aim to provide transformative understanding of the pathway in which the large pool of terrestrial DOM becomes disseminated among the large carbon reservoirs, and to improve the general understanding of how carbon, nitrogen, and iron are cycled on different time scales.
Bio:
陈洪梅，副教授，2020年10月入职维多利亚老品牌vic3308海洋与地球学院，近海海洋环境科学国家重点实验室（维多利亚老品牌vic3308） 。2014年获美国欧道明大学化学博士学位（导师Prof. Patrick G. Hatcher 和Prof. Kenneth Mopper），2015-2017年在美国橡树岭国家实验室的环境部从事博士后研究（导师 Prof. Baohua Gu），2018-2020年在美国欧道明大学的化学系担任研究助理教授。博士期间获得欧道明大学Dominion Scholar奖学金；近年多次获批美国西北太平洋国家实验室的环境分子实验室的大型仪器平台开放课题和美国橡树岭国家实验室的合作课题。陈洪梅博士长期从事环境有机地球化学研究，专长于应用高等分析手段在分子水平上解析天然有机质的来源、转化和去除路径，与美国欧道明大学、西北太平洋国家实验室、以及俄亥俄州立大学的仪器中心均建立良好合作关系，灵活操作各种不同磁场级别的傅里叶变换离子回旋共振超高分辨质谱仪，参与高分辨质谱在溶解有机质分析上的国际比对工作。陈洪梅博士将致力于研究光化学过程在全球碳氮循环中扮演的角色，定性定量研究表层水有机质在阳光直接辐射下的光化学转化和降解，以及暗环境下由铁催化的芬顿反应对水体和土壤有机质的转化。目前已在Analytical Chemistry，Environmental Science & Technology等多个国际知名学术期刊发表论文近30篇，论文被引累计1200次，h-index 18，担任Geochimica et Cosmochimica Acta，Nature Communications等多个国际学术期刊审稿人，并多次受邀评审NSF基金申请。
Conference ID：1838572951
Zoom link: https://huawan.zoomus.cn/j/1838572951
Suihui (随会) link: https://private.suimeeting.com/share/j/1838572951
