International Postdoctoral Fellows: Measurements and Modeling of the Atmospheric Chemistry of Chlorine Peroxide

小行星9401672 该奖项是根据国际初级研究员和博士后研究员计划，该计划使美国科学家和工程师能够在国外的卓越研究中心进行三到十二个月的研究。 该计划的奖项提供了联合研究的机会，以及使用国外独特或互补的设施，专业知识和实验条件。 该奖项将支持大卫·德哈恩博士与挪威空气研究所的Frode Storda博士和奥斯陆大学的Claus Jorgen Nielsen博士进行为期12个月的博士后研究访问。 这项研究的重点是过氧化氯（ClOOCl），这是一种被认为在极地平流层破坏臭氧方面具有活性的化合物，但从未在现场进行过测量。 最近，它已经表明，过氧化氯将与冰表面上的卤化物离子反应。 一个流管反应器将接口分光光度检测器，以定量识别所有的ClOOCl反应产物，并详细研究反应机理。 克努森电池反应器也将用于测量冰表面上的ClOOCl的粘附系数。 新发现的反应将被纳入最先进的“空气包”大气模型。 此外，DeHaan博士将有机会与来自欧洲各地的科学家一起参加第二次欧洲平流层北极和中纬度实验，这是一项实地测量活动，研究平流层冰粒的组成、现场冰面化学和氯的分配。***

9401672 DeHaan This award is under the International Junior Investigator and Postdoctoral Fellows Program, which enables U.S. scientists and engineers to conduct three to twelve months of research abroad at research centers of proven excellence. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve-month postdoctoral research visit by Dr. David DeHaan to work with Dr. Frode Storda at the Norwegian Institute for Air Research and Dr. Claus Jorgen Nielsen at the University of Oslo. This research will focus on chlorine peroxide (ClOOCl), a compound believed to be active in the destruction of ozone in the polar stratosphere but never measured in situ. Recently, it has been shown that chlorine peroxide will react with holide ions on ice surfaces. A flow-tube reactor will be interfaced to spectrophotometric detectors in order to quantitatively identify all ClOOCl reaction products and study the reaction mechanism in detail. A Knudsen cell reactor will also be used to measure the sticking coefficient of ClOOCl on ice surfaces. The newly-discovered reaction will be incorporated into state-of-the-art "air parcel" atmospheric models. In addition, Dr. DeHaan will have an opportunity to participate with scientists from all over Europe in the Second European Stratospheric Arctic and Mid-latitude Experiment (SESAME), a field measurement campaign studying the composition of stratospheric ice particles, in situ ice-surface chemistry, and chlorine partitioning. ***