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

D‘AndreaEAR-2117745这项重大研究仪器(MRI)计划拨款支持购买一台质谱仪，用于研究海洋、湖泊沉积物和树木年轮中有机分子中记录的气候和环境过程的稳定同位素替代指标。该仪器将支持拉蒙特-多尔蒂地球天文台(LDEO)的12名科学家的研究，以及影响到每年在LDEO接受培训的许多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现有的暑期实习计划，获得稳定同位素质谱学方法的实践经验学习。将获得一台带有气相色谱和液态色谱前端的Thermo Delta V Plus质谱仪，能够对包括有机酸、碳水化合物、氨基酸、磷脂和糖脂在内的极性和热不稳定化合物进行碳和氢同位素分析，并分析特定脂类中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，地下水含水层中的污染过程，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产生的微生物控制，古气候和陆地植物的进化。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势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.