Collaborative Research: A Proposal for the Cosmic-Ray prOduced NUclide Systematics on Earth (CRONUS-Earth) Project
合作研究:地球上宇宙射线产生的核素系统学(CRONUS-Earth)项目的提案
基本信息
- 批准号:0345820
- 负责人:
- 金额:$ 20.29万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-03-01 至 2011-02-28
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
ABSTRACTTerrestrial- in situ- cosmogenic nuclide (TCN) methods for surface exposure dating and otherearth-science applications were first demonstrated in 1986. During the subsequent 17 years these methods have developed into versatile and indispensable tools in many fields of modern Earth Sciences, including paleoclimatology, geomorphology, tectonics, hydrology, and volcanology. The TCN that have been demonstrated to be widely applicable are 3H, 10Be, 14C, 21Ne, 26Al, and 36Cl. This rapid development has been facilitated by methodological progress, including improvements in sampling strategies, sample preparation procedures and analyses of cosmogenic nuclides (by accelerator mass spectrometry (AMS) and noble gas mass spectrometry). In order to remain at the cutting edge of the earth sciences the accuracy of TCN methods must be significantly improved. However, it is the consensus of practitioners in the field that further developments are instead moving toward an impasse. This limitation is imposed, not by methodological considerations, but rather by incomplete understanding of the fundamental physical processes, and by lack of rigorous intercomparability between different investigators and methods. The global distribution of cosmogenic nuclide production depends on a number of interrelated factors, and thesefactors must be simultaneously controlled in order to arrive at the equations and parameters that accurately define production rates at all points, and over geological time. This task is far beyond the capability of any individual investigator.In order to achieve this next, necessary, step the CRONUS-Earth Project is proposed. The projecthas the following goals: (i) to establish a rigorous basis for intercomparison between measurement of different nuclides and by different investigators, (ii) to provide a firm linkage between cosmic-ray physics and the systematics of the TCN produced by the cosmic rays, and (iii) to produce generally-accepted formulations and parameters for calculation of TCN production. The ultimate goal is to advance the precision and accuracy of all TCN methods from its current range of ~10% to 20% toward a 5% level. This project is envisioned as an international, collaborative effort. CRONUS-Earth consists of six major components: (i) A methodological intercomparison, including sample preparation as well as analytical measurement. (ii) Spatial/temporal distribution of cosmic-ray fluxes, through "mining" existing neutron monitor datasets, modeling of neutron monitor responses, and measurement of saturated in situ 14C altitude/latitude profiles. (iii) Emplacement of artificial targets for 3He, 21Ne, 10Be, 32P and 36Cl production, to link contemporary cosmic-ray fluxes to production rates and scaling factors. (iv) Measurement of production cross-sections using laboratory neutron beams. (v) A numerical modeling effort to integrate the observations and to calculate the effects of past geomagnetic and paleoclimatic changes on cosmogenicnuclide production. (vi) Geological calibration of nuclide production rates, based on independently-dated surfaces worldwide. These will be classified by quality into primary calibration sites and secondary, or "verification", sites that will be used to test the overall production-rate model. These six components comprise a synergistic and coordinated approach to a problem that is clearly beyond the scope of individuals and small research teams. We propose a consortium approach to managing the project, involving multiple investigators, annual meetings to monitor progress, compile data, and exchange with the community, rapid electronic distribution of results, and integration of the final products through a project office charged with disseminating the results to the community. A linked CRONUS-Europe proposal has been submitted to the EU and will be closely coordinated with CRONUS-Earth.The CRONUS-Earth Project will address the NSF intellectual merit review criterion throughestablishing an improved, quantitative, physically-based, understanding of TCN production andaccumulation that can be applied to solve a wide variety of problems in the earth sciences. The Project will address the broader impacts criterion by providing formulations, parameters, and computer codes that will constitute an intellectual infrastructure enabling more consistent, accurate, and widespread application of TCN methods in the earth sciences. Furthermore, the Project will provide a basis for a more formal and organized future approach to promoting consistency in application of TCN methods, such as committees to provide recommended values for parameters. Finally, it will include a component to directly involve undergraduates, and especially minority students, in research in aspects of earth science related to CRONUS.
在1986年首次证明了用于表面曝光日期和其他术语科学应用的摘要层状核素(TCN)方法。在随后的17年中,这些方法已发展为现代地球科学领域的多功能性和不可或缺的工具,包括现代地球科学领域,包括古质学,地球学,地球学,地球学,沃尔克学,沃尔克(Tormorphologicy),水文,沃尔克(Tecomorphologicy),沃尔克(Tecomorphologicy),沃尔克(Tecomorphologicy),沃尔克(Tecomortologicy),沃尔克(Tectolologicy)。已被证明广泛适用的TCN为3H,10BE,14C,21NE,26AL和36Cl。方法学进步已经促进了这种快速发展,包括改进采样策略,样本制备程序和宇宙核素的分析(通过加速器质谱法(AMS)和贵重气体质谱法)。为了保持在地球科学的最前沿,必须显着提高TCN方法的准确性。但是,正是该领域的从业者共识,而是进一步发展朝着僵局发展。这种局限性不是通过方法上的考虑因素来实施的,而是由于对基本物理过程的不完全理解,并且由于不同研究者和方法之间缺乏严格的之间性。宇宙核素产生的全球分布取决于许多相互关联的因素,并且必须同时控制这些因素才能到达在所有点和地质时间上准确定义生产率的方程式和参数。这项任务远远超出了任何个人调查员的能力。为了实现下一个必要的步骤,提出了Cronus-Earth项目。 ProjectHAS以下目标:(i)为测量不同核素和不同研究者之间的比较建立一个严格的基础,(ii)提供宇宙射线物理学与宇宙射线产生的TCN系统学之间的牢固联系,(iii)(iii)生产tcn生产的表述和参数。最终目标是将所有TCN方法的精确性和准确性从目前的范围从约10%到20%提高到5%的水平。该项目被认为是国际协作的努力。 Cronus-Areth由六个主要组成部分组成:(i)方法论对比,包括样品制备和分析测量。 (ii)通过“采矿”现有的中子监视器数据集,中子监视器响应的建模以及测量饱和的原位14C高度/纬度轮廓的测量,宇宙射线通量的空间/时间分布。 (iii)将3HE,21NE,10BE,32P和36Cl生产的人工靶标添加,以将当代宇宙射线助焊剂与生产率和扩展因子联系起来。 (iv)使用实验室中子束测量生产横截面。 (v)一项数值建模努力,以整合观察结果并计算过去的地磁和古气候变化对宇宙核苷酸产生的影响。 (vi)基于全球独立的表面的核素生产率的地质校准。这些将通过质量分类为主要校准位点以及将用于测试整体生产率模型的次级或“验证”站点。这六个组件包括一种协同和协调的方法,显然超出了个人和小型研究团队的范围。我们提出了一种管理项目的方法来管理该项目,涉及多个调查人员,年度会议,以监控进度,与社区进行交流,快速电子分配结果以及通过负责将结果传播给社区的项目办公室整合。一项连接的cronus-europe提案已提交给欧盟,并将与Cronus-Earth紧密协调。Cronus-Earth项目将解决NSF知识绩效评论的标准,通过改进的,基于物理的,基于物理的,基于物理的,对TCN生产的理解,可以将其理解用于解决各种各样的问题。该项目将通过提供构成智力基础架构的公式,参数和计算机代码来解决更广泛的影响标准,从而使TCN方法在地球科学中更加一致,准确且广泛地应用。此外,该项目将为更正式和有组织的未来方法提供基础,以促进TCN方法的应用一致性,例如委员会为参数提供建议的价值。最后,它将包括一个直接涉及本科生,尤其是少数学生的组成部分,参与与克罗努斯有关的地球科学方面的研究。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Marc Caffee其他文献
WebCN: A web-based computation tool for in situ-produced cosmogenic nuclides
- DOI:
10.1016/j.nimb.2007.01.303 - 发表时间:
2007-06-01 - 期刊:
- 影响因子:
- 作者:
Xiuzeng Ma;Yingkui Li;Mike Bourgeois;Marc Caffee;David Elmore;Darryl Granger;Paul Muzikar;Preston Smith - 通讯作者:
Preston Smith
Determination of 36Cl Production Rates Derived from the Well-Dated Deglaciation Surfaces of Whidbey and Fidalgo Islands, Washington
确定来自华盛顿州惠德比岛和菲达尔戈岛已确定的冰消表面的 36Cl 生产率
- DOI:
10.1006/qres.2001.2278 - 发表时间:
2001 - 期刊:
- 影响因子:2.3
- 作者:
Terry W. Swanson;Marc Caffee - 通讯作者:
Marc Caffee
Nuclear reactions induced by cosmic-ray irradiation in space
太空中宇宙射线照射诱发的核反应
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Hiroshi Hidaka;Kunihiko Nishiizumi;Marc Caffee;Shigekazu Yoneda;Hiroshi Hidaka - 通讯作者:
Hiroshi Hidaka
Sm isotopic compositions of lunar meteorites
月球陨石的钐同位素组成
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Hiroshi Hidaka;Kunihiko Nishiizumi;Marc Caffee;Shigekazu Yoneda - 通讯作者:
Shigekazu Yoneda
Cosmic-ray exposure records of lunar meteorites studied from spallogenic and neutron captured products
通过散裂和中子捕获产物研究月球陨石的宇宙射线暴露记录
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Hiroshi Hidaka;Kunihiko Nishiizumi;Marc Caffee;Shigekazu Yoneda - 通讯作者:
Shigekazu Yoneda
Marc Caffee的其他文献
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{{ truncateString('Marc Caffee', 18)}}的其他基金
Collaborative Research: Research Infrastructure: CFS (Track III) Cosmogenic Nuclides in Earth Science Research: Allied facilities for sample preparation, analysis, and training
合作研究:研究基础设施:CFS(第三轨)地球科学研究中的宇宙成因核素:用于样品制备、分析和培训的联合设施
- 批准号:
2300559 - 财政年份:2023
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Collaborative Research: A fossil ecosystem under the ice: deciphering the glacial and vegetation history of northwest Greenland using long-lost Camp Century basal sediment
合作研究:冰下的化石生态系统:利用失传已久的坎普世纪基底沉积物破译格陵兰岛西北部的冰川和植被历史
- 批准号:
2114635 - 财政年份:2021
- 资助金额:
$ 20.29万 - 项目类别:
Standard Grant
Collaborative Research: 3 Myr of Laurentide Ice Sheet History Inferred from Cosmogenic Nuclides in Ice-Rafted Debris
合作研究:根据冰筏碎片中的宇宙成因核素推断 3 Myr 的劳伦太德冰盖历史
- 批准号:
2116210 - 财政年份:2021
- 资助金额:
$ 20.29万 - 项目类别:
Standard Grant
Collaborative Research: Synchronizing the WAIS Divide and Greenland Ice Cores from 30-65 ka BP Using High-resolution 10Be Measurements
合作研究:使用高分辨率 10Be 测量同步 WAIS 分水岭和格陵兰冰芯 30-65 ka BP
- 批准号:
1644094 - 财政年份:2017
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Facility Support: Accelerator Mass Spectrometry at PRIME Lab
设施支持:PRIME 实验室的加速器质谱分析
- 批准号:
1560658 - 财政年份:2016
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Facility Support: Accelerator Mass Spectrometry at PRIME Lab
设施支持:PRIME 实验室的加速器质谱分析
- 批准号:
1153689 - 财政年份:2012
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core
合作研究:WAIS 鸿沟核心深处的宇宙放射性核素
- 批准号:
0839042 - 财政年份:2009
- 资助金额:
$ 20.29万 - 项目类别:
Standard Grant
Facility Support: Purdue Rare Isotope Measurement Laboratory
设施支持:普渡大学稀有同位素测量实验室
- 批准号:
0851981 - 财政年份:2009
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Collaborative Research: Cosmogenic Radionuclides in the WAIS Divide Ice Core
合作研究:WAIS 分水岭冰芯中的宇宙放射性核素
- 批准号:
0636815 - 财政年份:2007
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
Facility Support: The Purdue Rare Isotope Measurement Laboratory
设施支持:普渡大学稀有同位素测量实验室
- 批准号:
0452936 - 财政年份:2005
- 资助金额:
$ 20.29万 - 项目类别:
Continuing Grant
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