Early Career: Upgrade of Isotope Ratio Mass Spectrometer at Boston College

1535824 wong该拨款支持购买两个样品导入系统，一个Gas Bench II入口和氢气杯，这将与波士顿学院地球与环境科学系现有的气源稳定同位素比质谱仪（SIRMS）相匹配。SIRMS及其外围设备将支持两名早期职业终身教职员工的研究项目，他们的研究重点是过去的气候问题，需要大量的同位素分析（每项研究几百到几千个）。支持将能够充分利用目前未充分利用的分析设备，作为样品导入设备，允许高通量稳定同位素分析，以支持目前缺乏的高分辨率古气候研究。所要求的SIRMS将支持的具体研究包括研究美洲低纬度和中纬度洞穴中碳酸盐岩洞中记录的全新世气候动力学的稳定同位素记录，以研究区域气候动力学及其与十年至千年时间尺度海洋-大气动力变化的关系，以及海洋沉积物的稳定同位素研究，以调查全球气候之间的联系；冰盖动力学和地球系统对更长时间尺度温室气体强迫的敏感性。这项设备资助将促进研究者的研究，对理解气候动态与生态系统稳定性、碳循环和海平面动态之间的关系具有重要意义。研究人员将让本科生和研究生体验学习稳定同位素地球化学方法及其在古环境研究中的应用。这项资助与国家自然科学基金促进科学进步的使命是一致的，可以通过提高对地球系统气候动力学及其与全球和区域水循环的强迫和反馈的认识，以及培养学生广泛应用于学术界和工业界的分析方法，促进国家的繁荣和福祉

1535824WongThis grant supports acquisition of two sample introduction systems, a Gas Bench II inlet and Hydrogen Cup, that will be mated to an extant gas source stable isotope ratio mass spectrometer (SIRMS) in Department of Earth and Environmental Science (EES) at Boston College (BC). The SIRMS and peripherals will support the research programs of two early career, tenure-track faculty whose research focuses on questions of past climate and require large numbers of isotopic analyses (several hundred, to a few thousand per study). Support will enable full utilization of analytical equipment that is at present underutilized as sample introduction equipment that allows for high throughput stable isotopic analysis to support high resolution paleoclimate studies is presently lacking. Specific research to be supported with the requested SIRMS includes studies of stable isotopic records of Holocene climate dynamics as recorded in speleothem carbonate from low and mid latitudes caves in the Americas to study regional climate dynamics and its relationship to ocean-atmospheric dynamic changes over decadal to millennial time scales and stable isotopic studies of marine sediments to investigate the linkages between global climate, ice sheet dynamics and Earth system sensitivity to greenhouse-gas forcing over longer time scales. Investigator research that will be fostered by this equipment grant has implications for understanding the relationship between climate dynamics and ecosystem stability, the carbon cycle and sea level dynamics. The investigators will engage undergraduate and graduate students in experiential learning in methods of stable isotope geochemistry and applications to paleoenvironmental research. This support is congruent with NSFs mission of promoting the progress of science and may advance the national prosperity and welfare through advancing knowledge of Earth system climate dynamics and its forcing and feedbacks with the global and regional water cycles as well training students in analytical methods that are widely used in both academia and industry.***