Stratospheric Transport and Stratospheric/Tropospheric Exchange: Insights and Constraints from Be-10, Be-7 and Their Ratio

平流层传输和平流层/对流层交换：Be-10、Be-7 及其比率的见解和约束

• 批准号: 9714982
• 负责人: Jack Dibb
• 金额: $ 14.99万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714982&HistoricalAwards=false
• 关键词: Stratospheric; Transport; Tropospheric; Exchange; Insights

9714982 Dibb Cosmogenic isotopes represent a largely untapped source of information on transport within the stratosphere and exchange between the stratosphere and troposphere. The Be-10 and Be-7 (beryllium) pair of isotopes is particularly useful as tracers because their sources are known, they are basically non-reactive, and their greatly different half-lives makes their ratio a useful clock over time scales of months to several years. The principal investigator and researchers at the Lawrence Livermore National Laboratory (LLNL) have compiled the small set of data that exist on these isotopes and their ratio. They will increase the data base by nearly an order of magnitude by measuring and analyzing samples taken during several recent airborne sampling campaigns. Latitudinally, the samples range from more than 70(N to 70(S, from both the lower stratosphere and the upper troposphere. In addition, during the campaigns measurements were obtained of a variety of other tracers such as ozone, carbon monoxide, carbon dioxide, methane and water vapor. These data will be compared with the beryllium isotopes results data. Dr. Dibb also will work with LLNL scientists who plan to simulate the transport and exchange processes of the stratosphere. The observational data will serve as constraints for model simulations of transports in these regions.

9714982 DIBB宇宙成因同位素是关于平流层内的传输和平流层与对流层之间的交换的一个基本上未被开发的信息来源。Be-10和Be-7(铍)同位素对作为示踪剂特别有用，因为它们的来源是已知的，它们基本上是非反应性的，而且它们的半衰期非常不同，使得它们的比率在几个月到几年的时间尺度上是一个有用的时钟。劳伦斯·利弗莫尔国家实验室(LLNL)的首席研究员和研究人员汇编了关于这些同位素及其比率的少量数据。他们将通过测量和分析最近几次空中采样活动中采集的样本，将数据库增加近一个数量级。在纬度上，样本范围从70多个(北纬)到70个(S，来自平流层下部和对流层上部。此外，在宣传活动期间，还对臭氧、一氧化碳、二氧化碳、甲烷和水蒸气等各种其他示踪剂进行了测量。这些数据将与铍同位素结果数据进行比较。迪布博士还将与LLNL的科学家合作，后者计划模拟平流层的传输和交换过程。观测数据将作为这些地区输送模式模拟的约束条件。