MRI Acquisition: Detecting and monitoring changes in the arctic using stable isotope techniques

0923571：MRI采集：利用稳定同位素技术探测和监测北极地区的变化该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。 安克雷奇的阿拉斯加大学获得了一笔赠款，用于购买两台稳定同位素质谱仪和一台可调谐二极管激光系统，以量化高纬度地区的变化过程。 这些仪器将用于在涉及植物、土壤、水和动物的研究中测量碳、氮、氢和氧（C-13、N-15、H-2（氘）、O-18）同位素的自然丰度。 这些仪器还能够测量富含这些同位素的样品，用于研究植物水源和小型哺乳动物的野外代谢率的标记实验。 获得这套仪器的知识价值和科学动机来自北极正在迅速变化的事实，迫切需要使用时空一体化的工具，以及能够揭示生物圈-大气和水生系统之间复杂联系和食物网错综复杂性质的工具。 这些仪器将有助于量化植被变化的后果、小型哺乳动物实地代谢率的变化模式、作为永久冻土融化的植被水源、量化地方到区域尺度的降水地球化学以及海洋哺乳动物的食物网生态。 除了对阿拉斯加众多科学家的研究生产力产生影响外，新仪器还将支持阿拉斯加氖（国家生态观测站网络）、国际极地年和安克雷奇水道理事会公民科学的新需求。 该奖项还将允许学生在国家的最先进的仪器，包括本科生，研究生和阿拉斯加原住民学生在阿拉斯加原住民科学与工程计划（ANSEP）的培训加强教育准备。有关这项研究的资料可在以下网址查阅：http://www.uaa.alaska.edu/enri/usnip/index.cfm

0923571: MRI Acquisition: Detecting and monitoring changes in the arctic using stable isotope techniquesThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The University of Alaska at Anchorage has been awarded a grant to purchase two stable isotope mass spectrometers plus a tunable diode laser system to quantify the processes of change in high latitudes. The instruments will be used to measure the natural abundance of isotopes of carbon, nitrogen, hydrogen and oxygen (C-13, N-15, H-2 (deuterium), O-18), in studies involving plants, soils, water, and animals. The instruments are also capable of measuring samples that have been enriched with these isotopes, in labeling experiments designed to study plant water sources and field metabolic rates of small mammals. The intellectual merit and the scientific motivation for acquiring this instrumentation package derives from the fact that the Arctic is changing rapidly, and there is a great need for using tools that are integrative in time and space, and tools that can unravel the complexity of linkages between the biosphere-atmosphere and aquatic systems and the intricate nature of food webs. The instruments will facilitate quantification of the consequences of vegetation change, of shifting patterns in the field metabolic rates of small mammals, of the water sources of vegetation as permafrost melts, quantification of precipitation geochemistry at local to regional scales, and food web ecology of marine mammals. In addition to the impact on the research productivity of numerous scientists in Alaska, the new instruments will support the emerging needs of NEON (National Ecological Observatory Network) in Alaska, the International Polar Year, and citizen science with the Anchorage Waterways Council. This award will also allow the enhanced educational preparation of students in state-of-the-art instrumentation, including the training of undergraduates, graduate students, and Alaska Native students in the Alaska Natives Science and Engineering Program (ANSEP). Information on the study can be obtain in this website http://www.uaa.alaska.edu/enri/usnip/index.cfm