报告摘要：
A fundamental goal of aquatic photochemical studies is to evaluate, quantify and, if possible, predict the role of solar irradiation in chemical cycles and ecological dynamics. The photochemical production of reactive oxygen species (ROS; O2–, H2O2) is a critical process that must be considered when evaluating rates and pathways for many redox reactions in sunlit ocean waters. To examine the significance of ROS and other redox chemistry, controlled irradiations of “contained” samples are used to contribute specific knowledge that allow extrapolation to “uncontained” sunlit surface waters. Underlying assumptions inherent in interpreting laboratory experiments and scaling them to regional and global scale photochemical processes are often not critically evaluated and can greatly bias results. Previous publication does not automatically validate current approaches. Experimental and intellectual “closure” is more important than ever as new data allow re-evaluation of old assumptions. This presentation will review and critique laboratory methods for examining photochemical rates and provide some new data relating transient photochemical species to the overall redox state of the surface ocean, with potential implications for elemental cycling of critical trace nutrients. Examples will hopefully provide insight for considering how simplifying assumptions can impact understanding of photochemical processes in aquatic systems.
个人介绍：
William L. Miller博士，美国佐治亚大学海洋科学系教授，国际著名海洋化学家。分别在维克森林大学、南佛罗里达大学、罗德岛大学获得学士（1979）、硕士（1985）、博士（1990）学位。在美国环境保护署完成博士后研究（1991-1995）后，入职加拿大Dalhousie大学，历任助理教授（1995-1998）、副教授（终身，1998-2004）；2004年入职美国佐治亚大学，历任副教授（终身，2004-2008）、教授（2008至今）；期间任佐治亚大学海洋研究所所长（2004-2013）、国际上层海洋-低层大气相互作用研究（SOLAS）计划美方代表（2012-2015）、美国国家自然科学基金委地球科学学部海洋科学处化学海洋学项目主管（2015-2017）。研究工作聚焦水体光学、痕量元素生物地球化学及海洋遥感。在国际地学主流期刊发表论文近百篇，Google Scholar总引用7200余次，h-index 40。
