Cosmogenic Radionuclides in the Siple Dome Ice Core

Siple Dome冰芯中的宇宙放射性核素

• 批准号: 9725257
• 负责人: Kunihiko Nishiizumi
• 金额: $ 36万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725257&HistoricalAwards=false
• 关键词: Cosmogenic; Radionuclides; Siple; Dome; Ice

*** 9725257 This award is to support a project to measure cosmogenic nuclides in the Siple Dome ice core. Cosmogenic radionuclides in polar ice cores have been used to study long-term variations in several important geophysical variables, including solar activity, geomagnetic field, atmospheric circulation, snow accumulation rates, and others. The investigators will measure profiles of Beryllium-10 (Be-10) and Chlorine-36 (Cl-36) in the entire ice core, which spans the time period from the present to about 100,000 years before present. The resulting time series of nuclide concentrations will be applied to three main problem areas: deducing the history of solar activity, deducing the history of variations in the geomagnetic field, and a detailed comparison of Be-10 and Cl-36 production and the Carbon-14 (C-14) profile. It will be particularly instructive to compare the Antarctic record with the detailed Arctic record from the GISP2 ice core. ***

这个奖项是为了支持一个在简单圆顶冰芯中测量宇宙核素的项目。极地冰芯中的宇宙成因放射性核素已被用于研究几个重要的地球物理变量的长期变化，包括太阳活动、地磁场、大气环流、雪积累率等。研究人员将测量整个冰芯中铍-10 （Be-10）和氯-36 （Cl-36）的剖面，这段时间跨度从现在到距今约10万年。由此产生的核素浓度时间序列将应用于三个主要问题领域：推断太阳活动的历史，推断地磁场的变化历史，以及be -10和Cl-36产量与碳-14 （C-14）剖面的详细比较。将南极记录与GISP2冰芯的详细北极记录进行比较将特别有指导意义。＊＊＊