International Research Fellowship Program: Depth Profile Variability in the Stable Carbon Isotopic Composition of Organic Matter from Australian Soils

0107264Wyndham国际研究员奖励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。 该计划的奖项提供了联合研究的机会，以及使用独特或互补的设施，专业知识和国外的实验条件。永利将与迈克尔博士一起工作。Bird在澳大利亚国立大学地球科学研究院就澳大利亚土壤有机物稳定碳同位素组成的深度剖面变化进行的研究。该项目涉及对澳大利亚现代稀树草原土壤碳同位素的研究。 它将对这些生态系统的变异性提供更好的限制，可用于解决全球变化和古生态学问题。 将对澳大利亚热带稀树草原生物群落的不同土壤类型的有机物中的稳定碳同位素比率进行详细的深度测量。 这项研究将扩大目前应用于古土壤碳同位素测量的古环境记录研究的分析工具，并有助于控制陆地生物圈碳封存和循环过程的研究。伯德博士目前活跃于广泛的稳定碳同位素研究，它主要研究自然和人为因素对全球碳循环的影响。 除了高素质的研究设施，澳大利亚有一个环境，提供了广泛的热带草原生态系统和土壤类型的多样性，在一个可访问的区域内，非常适合这项研究。

0107264WynnThe 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 provide eighteen months of support to Dr. Jonathan G. Wynn to work with Dr. Michael I. Bird at the Australian National University's Research School of Earth Sciences on the depth profile variability in the stable carbon isotopic composition of organic matter from Australian soils.The project involves the study of carbon isotopes from modern savanna soil of Australia. It will provide better constraints on variability in these ecosystems, which can be used to address issues of global change and paleoecology. Detailed depth-specific measurements will be taken of stable carbon isotope ratios in organic matter from diverse soil types of the tropical savanna biome in Australia. This research will expand the analytical tools which are currently being applied to studies of paleoenvironmental records derived from carbon isotope measurements of ancient soils, and contribute to studies of the processes controlling carbon sequestration and cycling in the terrestrial biosphere.Dr. Bird is currently active in a wide range of stable carbon isotopic research, which has centered around the study of natural and anthropogenic influences on the global carbon cycle. In addition to the high caliber research facilities, Australia has an environment which provides a wide diversity of savanna ecosystems and soil types within an accessible region ideal for this study.