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). ***

“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。”该合同将有助于购买连续流同位素比质谱仪。请求的是带有conlo - iv接口的Thermo Delta V。该仪器被要求提高样品灵敏度（从而减少必要的样本量），因为目前部门的仪器资源已完全投入使用。该仪器将与现有的外围设备接口，包括Gasbench-II和PAL-80自动进样器，允许碳酸盐和水制备，以及Costech高温发生器/元素燃烧系统（HTG/ECS）。PI将承担全面的操作、维护和监督责任。将聘请一名兼职实验室经理，协助仪器的操作、维护和培训。学生也将发挥重要作用。UMd将为购买该仪器提供资金。此外，大学将翻新空间，在地质系内包括一个IRMS和湿实验室。PI将使用该仪器研究两个广泛的主题：热带同位素树木气候学和海洋/大气气候年代际变化的珊瑚年表。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来更好地了解热带气候地区的季节性。氧同位素可用作对流降雨的代用物。内部开发的系统允许高样品吞吐量和快速分析，因此可以生成非常高分辨率的同位素代理数据。初步结果表明，同位素气候重建与ENSO事件具有良好的相关性。在第二个主题（珊瑚年表）下，增强的样品处理技术提供了可与连续流动模式下的双入口测量相媲美的精度。这样就可以以每天约120次的速度对珊瑚样本进行高分辨率的碳和氧同位素测量。因此，可以进行多年代用测量，以更好地了解过去的气候（并模拟当前和未来的气候）。在形成PI的基础时？这台仪器将成为气候科学课程的基础，为学生提供广泛的培训。该实验室将资助高中生，并为高级顶点研究项目和“地球、生命和时间”学者项目提供分析可能性。PI将在他的项目中促进妇女和少数民族的发展（他过去在这方面非常成功）。＊＊＊