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

通过交叉光束和体光化学实验探索臭氧形成中的异常动力学同位素效应

• 批准号: 0809973
• 负责人: Kristie Boering
• 金额: $ 39万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809973&HistoricalAwards=false
• 关键词: Probing; Unusual; Kinetic; Isotope; Effects

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.

在这个奖项，共同资助的实验物理化学计划的化学司和大气化学计划的大气科学司（地球科学理事会），教授克里斯蒂A。加州大学伯克利分校的Boering和她的研究生研究人员将研究氧的化学性质，以确定在大气臭氧中观察到的不寻常的同位素分馏的根本原因。 Boering小组将在伯克利实验室进行大量光化学研究，并将前往台湾，在中研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研究。 此外，马奎特大学的Dmitri Babikov教授和新墨西哥州大学的Hua Guo教授以及匈牙利科学院的György Lendvay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层复杂运作的线索。 臭氧同位素异常仍然是个谜，不能用标准的化学模型完全解释。 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。 对这些气体中微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，这对气候变化研究非常重要。 除了这项工作的广泛科学影响外，Boering教授的学生正在经历一种全球性的研究工作，这种研究工作正在成为现代科学的常态，从而将他们培养成我们社会未来所需要的那种全球参与的科学家。