应我校买球app网站院董爱国和陈曦邀请，英国利兹大学（University of  Leeds）地球与环境学院 Simon Poulton 教授将来我校进行学术交流，并做学术报告。

 题目：Phosphorus Controls on Earth’s Early Oxygenation History

 时间：2024年3月7日（星期四）上午10:00-11:30

 地点：逸夫楼901

 报告人简介：Simon Poulton，英国利兹大学教授，欧洲地球化学学会会士、英国皇家学会沃尔夫森优秀科研奖（Royal Society Wolfson Research Merit Award）获得者。他长期致力于地球生物圈化学演化、营养元素循环以及地球早期大气和海洋环境演变规律等问题的研究，通过沉积岩的地球化学及非传统同位素等极具独创性的手段揭示早期环境与生命协同变化规律，并取得重要成果。发表论文一百余篇，包括Nature、Science、Nature Geoscience、Nature Communications、Science Advances等期刊论文数十篇，SCI引用18000余次。获得2023年中国科学院国际人才计划（PIFI）资助。

 报告摘要：Over the last 20 years, huge progress has been made in terms of our understanding of Earth's oxygenation history. This lecture will start with a general overview and timeline of the advances made, culminating in the most up-to-date reconstruction of atmospheric and oceanic oxygenation. Recent research will then be presented on the role that phosphorus cycling played in priming the Earth for its first major rise in atmospheric oxygen during the Great Oxidation Episode (GOE). Research pertaining to the dynamics of the GOE and links to phosphorus cycling will then be discussed. This work documents a major delay of ~100 million years in the timing of persistent atmospheric oxygenation, with intense fluctuations in atmospheric oxygen levels being linked to major climate perturbations. Finally, we will review how far our understanding of the history of mid-Proterozoic ocean chemistry has evolved over the last 20 years, with an ultimate focus on potential drivers of apparent temporal and spatial variability in this record.

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