International Research Fellow Awards: Chemical Characterization of the Inorganic Material in Individual Snowcrystals Using SEM/EDS and SIMS

9704208埃尔曼国际研究员奖计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该项目的奖项提供了联合研究的机会，并提供了使用国外独特或互补的设施、专业知识和实验条件的机会。该奖项将支持谢丽尔·H·埃尔曼博士在瑞士维利根的保罗·谢勒研究所与乌尔斯·巴尔滕斯佩格博士合作进行为期12个月的博士后研究访问。该研究所在冰川和冰芯研究方面拥有强大的项目。该项目将使用扫描电子显微镜结合能量色散光谱(SEM/EDS)和二次离子质谱仪(SIMS)来研究雪晶，以收集有关冰中化学物质浓度与大气中化学物质浓度之间关系的信息。通过研究冰芯，他们可以找到过去火山喷发、核武器试验和过去全球变暖/变冷周期的证据。选定的地点是进行这项研究的理想地点，不仅是因为它的地理位置，还因为将要研究的蒙特罗萨冰川是一个寒冷的冰川，其温度永远不会高于零度，从而避免融化，这可能会模糊冰芯样品的时间分辨率。***

9704208 Ehrman The International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twenty four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve-month postdoctoral research visit by Dr. Sheryl H. Ehrman to work with Dr. Urs Baltensperger at the Paul Scherrer Institute in Villigen, Switzerland. The Institute has strong programs in glacier and ice core research. This project will study snow crystals using a scanning electron microscope coupled with energy dispersive spectroscopy (SEM/EDS) and secondary ion mass spectrometry (SIMS) to gather information on how concentrations of chemical species in ice relate to concentrations of chemical species in the atmosphere. By studying ice cores, they can find evidence of past volcanic eruptions, nuclear weapons tests, and past global heating/cooling cycles. The selected site is ideal for this research, not only because of its geography, but because the Monte Rosa glacier which will be studied, is a cold glacier, the temperature of which never rises above zero, thus avoiding melting which can blur the time resolution in the ice core samples. ***