MRI: Acquisition of Continuous Flow Isotope Ratio Mass Spectrometer (IRMS) for Climate Change and Environmental Research at the Lamont-Doherty Earth Observatory

这项主要研究仪器（MRI）计划资助购买一台质谱仪，用于研究记录在海洋、湖泊沉积物和树木年轮中的有机分子中气候和环境过程的稳定同位素代用物。该仪器将支持拉蒙特-多尔蒂地球观测站（LDEO）超过12名科学家的研究，以及每年影响许多在LDEO接受培训的本科生和研究生的教育计划。该仪器还将支持巴纳德学院的学生，他们将通过LDEO现有的暑期实习项目获得稳定同位素质谱方法的实践学习。将获得带有气相色谱仪和液相色谱仪前端的Thermo DELTA V Plus质谱仪，能够对极性和热不稳定化合物（包括有机酸、碳水化合物、氨基酸、磷脂和糖脂）进行碳和氢同位素分析，并分析特定脂质的碳和氢稳定同位素。该仪器将支持跨学科研究，包括研究海洋中石油产品的降解、地下水含水层的污染过程、有害藻类和细菌分类群内的代谢途径、海洋边缘沉积物中甲烷生产的微生物控制、古气候和陆生植物的进化。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

D’AndreaEAR-2117745This Major Research Instrumentation (MRI) Program grant supports acquisition of a mass spectrometer for study of stable isotopies proxies of climate and environmental processes as recorded in organic molecules in ocean and lake sediments and tree rings. The instrument will support the research of over twelve scientists at Lamont-Doherty Earth Observatory (LDEO) and the educational program that impacts many undergraduate and graduate students trained at LDEO annually. The instrument will also support students at Barnard College that will gain hand-on experiential learning in methods of stable isotope mass spectrometry through an extant summer internship Program at LDEO.A Thermo DELTA V Plus Mass Spectrometer with gas chromatograph and liquid chromatograph front ends will be acquired enabling carbon and hydrogen isotopic analysis of polar and thermo-labile compounds including organic acids, carbohydrates, amino acids, phospholipids, and glycolipids and analysis of carbon and hydrogen stable isotopes in specific lipids. The instrument would support interdisciplinary research including studies of the degradation of petroleum products in the ocean, contamination processes in groundwater aquifers, metabolic pathways within harmful algal and bacterial taxa, microbial controls on methane production in ocean margin sediments, paleoclimate and the evolution of terrestrial plants.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.