Probing Unusual Kinetic Isotope Effects in Ozone Formation through Crossed Beam and Bulk Photochemistry Experiments

在这项由化学系实验物理化学计划和大气科学部大气化学计划(地球科学理事会)共同资助的奖项中，加州大学伯克利分校的Kristie A.Boering教授将与她的研究生研究人员一起研究氧的化学，以确定在大气臭氧中观察到的异常同位素分馏的根本原因。博林团队将在伯克利的实验室进行大规模光化学调查，并将前往台湾，在中科院原子与分子科学研究所的实验室进行多项原子+分子氧交换反应的交叉束调查。此外，马奎特大学的德米特里·巴比科夫教授和新墨西哥大学的郭华教授以及匈牙利科学院的格奥尔基·伦德维教授将对这些实验研究进行补充。大气气体中的同位素模式可以用来收集地球大气复杂运行的线索。臭氧同位素异常仍然是个谜，用标准的化学模型也不能完全解释。臭氧同位素异常转移到其他重要的痕量气体，包括二氧化碳和一氧化二氮。对这些气体中痕量同位素分馏的深入了解将使科学家能够开发出可靠的大气模型--这在气候变化研究中非常重要。除了这项工作的广泛科学影响外，博林教授的学生正在经历一种遍及全球的研究努力，这正在成为现代科学的常态--从而将他们培养成我们的社会未来所需要的那种参与全球事务的科学家。

In this award, co-funded by the Experimental Physical Chemistry Program of the Division of Chemistry and the Atmospheric Chemistry Program of the Atmospheric Sciences Division (Geosciences Directorate), Professor Kristie A. Boering of the University of California - Berkeley, together with her graduate student researchers, will investigate the chemistry of oxygen in order to determine the root-cause for the unusual isotopic fractionation observed in atmospheric ozone. The Boering group will carry out bulk photochemical investigations in their laboratory in Berkeley and will travel to Taiwan to carry out a number of crossed-beam investigations of the atomic + molecular oxygen exchange reaction in the laboratories of the Institute of Atomic and Molecular Sciences of Academica Sinica. In addition, these experimental studies will be supplemented with theoretical investigations by Prof. Dmitri Babikov of Marquette University and Prof. Hua Guo of the University of New Mexico, as well as Prof György Lendvay of the Hungarian Academy of Sciences. Isotopic patterns in atmospheric gases can be used to glean clues into the complicated workings of the earth's atmosphere. The ozone isotope anomaly is still mysterious, and is not completely explicable with standard chemical models. The ozone isotope anomaly is transferred to other important trace gases, including carbon dioxide and nitrous oxide. Developing a firm understanding of the trace isotope fractionation in these gases will allow scientists to develop robust models of the atmosphere -- which are important in climate change research. Besides the broad scientific impact of this work, Prof. Boering's students are experiencing the kind of globe-spanning research effort that is becoming more of the norm in modern science -- thus training them to be the kind of globally-engaged scientists that our society will need in the future.