英国兰卡斯特大学Peter Wynn博士学术报告

地球系统科学论坛第610期：英国兰卡斯特大学Peter Wynn博士学术报告

应304am永利集团官网胡超涌教授的邀请，英国兰卡斯特大学Peter Wynn博士来我校访问并举行报告会。欢迎参加!

    报告时间：2018年9月7日（周五）下午4:00-5:00

    报告地点：地质斋（主楼308）

    报告题目：Exploring the speleothem sulphur record

    报告人简介： 2001年本科毕业于剑桥大学，2004年获得谢菲尔德大学博士学位，2004-2007年在伯明翰大学从事博士后研究，其后就职于兰卡斯特大学，现为高级讲师。他主要从事低温地球化学研究，关注生物地球化学循环和古气候。最近几年，他围绕地球表层关键带，开展N、S和P的污染研究。

    报告内容介绍：The sulphur biogeochemical cycle has perhaps been one of the most heavily modified nutrient cycles of the last century. Fossil fuel combustion has enhanced sulphur loading to the atmosphere, leaving an unmistakable legacy in the polar ice core records. However, such ice core records are distant from the source of pollution and do little to provide a regional perspective on sulphur pollution dynamics. Here, we explore the use of speleothems (cave stalagmites and stalactites) as regional archives of sulphur pollution. Many speleothems have now been shown to contain a sulphur record which depicts a peak in emissions status and subsequent decline following the introduction of legislation to reduce SOx emissions. Despite heavy modification of the atmospheric sulphur signal in the overlying soil and karst, sulphur isotopes have been used to attribute the sulphur to source and also to explore the mechanism of incorporation. Through stable isotopes, the speleothem sulphur archive is seen to be far more than just a record of anthropogenic sulphur pollution, encompassing also volcanic activity and changing climatic conditions.

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2018年9月5日