Acquisition of a continuous flow isotope ratio mass analyzer for tropical paleoclimatology

购买用于热带古气候学的连续流同位素比质量分析仪

• 批准号: 0929983
• 负责人: Michael Evans
• 金额: $ 17.32万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0929983&HistoricalAwards=false
• 关键词: Acquisition; continuous; flow; isotope; ratio

0929983Evans"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." This award will facilitate the purchase of a continuous flow isotope ratio mass spectrometer. Requested is a Thermo Delta V with Conflo-IV interface. This instrument is being requested to increase sample sensitivity (and thereby decrease necessary sample size) and because current departmental instrument resources are fully committed. The instrument will be interfaced with existing peripherals These include a Gasbench-II and PAL-80 autosampler allowing carbonate and water prep, and a Costech High Temperature Generator/Elemental Combustion System (HTG/ECS). The PI will assume overall operation, maintenance and oversight responsibility. A half-time laboratory manager will be hired on grant support to assist with instrument operation, maintenance and training. Students will also play a major role. UMd will contribute funds towards the purchase of this instrument. In addition, the University will renovate space to include an IRMS and wet lab within the Department of Geology. The PI will use this instrument for research in two broad themes, Tropical isotope dendroclimatology, and Coral chronologies of interdecadal ocean/atmosphere climate variability. Under the first theme, the PI intends to better understand seasonality in tropical climate regions through oxygen isotopic compositions in trees lacking annual rings. Oxygen isotopes can be used as a proxy for convective rainfall. The in-house developed system allows high sample throughput and rapid analyses so that very high resolution isotope proxy data can be generated. Preliminary results show good correlation between isotope climate reconstructions and ENSO events. Under the second theme (coral chronologies), enhanced sample processing techniques offer precision comparable to dual-inlet measurements in a continuous flow mode. This allows high-resolution carbon and oxygen isotope measurements from coral samples at a rate of ~120 per day. Multi-decadal proxy measurements can thus be made to better understand past climates (and model current and future ones). While forming the basis of the PI?s analytical laboratory at UMd, this instrument will be the foundation of a climate science curriculum offering broad student training. The laboratory will sponsor high school students and provide analytical possibilities for the senior capstone research program and "Earth, Life and Time" Scholars program. The PI will promote women and minorities in his program (of which he has been very successful in the past). ***

0929983Evans“该奖项是根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金的。”该奖项将有助于购买连续流同位素比质谱仪。要求的是带有 Conflo-IV 接口的 Thermo Delta V。要求该仪器提高样本灵敏度（从而减少必要的样本量），因为当前部门仪器资源已完全投入。该仪器将与现有外围设备连接，其中包括允许碳酸盐和水制备的 Gasbench-II 和 PAL-80 自动进样器，以及 Costech 高温发生器/元素燃烧系统 (HTG/ECS)。 PI 将承担整体运营、维护和监督责任。将在赠款支持下聘请一名半职实验室经理，协助仪器操作、维护和培训。学生也将发挥重要作用。 UMd 将捐资购买该仪器。此外，大学还将翻新空间，在地质系内设立 IRMS 和湿实验室。 PI 将使用该仪器进行两大主题的研究：热带同位素树木气候学和年代际海洋/大气气候变化的珊瑚年代学。在第一个主题下，PI 打算通过缺乏年轮的树木​​的氧同位素组成更好地了解热带气候地区的季节性。氧同位素可以用作对流降雨的替代指标。内部开发的系统可实现高样品通量和快速分析，从而可以生成非常高分辨率的同位素代理数据。初步结果显示同位素气候重建与 ENSO 事件之间具有良好的相关性。在第二个主题（珊瑚年代学）下，增强的样品处理技术提供了与连续流模式下的双入口测量相当的精度。这样可以以每天约 120 个的速度对珊瑚样本进行高分辨率碳和氧同位素测量。因此，可以进行多十年代理测量，以更好地了解过去的气候（并对当前和未来的气候进行建模）。该仪器不仅构成了马里兰大学 PI 分析实验室的基础，还将成为提供广泛学生培训的气候科学课程的基础。该实验室将赞助高中生，并为高级顶点研究计划和“地球、生命和时间”学者计划提供分析可能性。 PI 将在他的计划中促进女性和少数族裔的发展（他过去在该计划中非常成功）。 ***