Presidential Faculty Fellows Program

美国国家科学基金会主席奖获得者被选为美国国家科学基金会主席奖获得者。他将继续研究北极冻土带生态系统中碳、氮、磷和硫的运输，包括物理和地球化学运输机制和途径。这些研究将有助于更好地理解酸雨、富营养化、物种引进和气候变化等广泛的环境问题。这项研究将导致生态系统功能的预测能力，以显示生物体如何相互反应以及人类施加的变化。关于地球化学循环的基本问题，在两个区域和全球尺度的生物将进行审查。一项涉及使用稳定同位素的新技术将在整个生态系统的尺度上应用，并将用于估计北极生态系统目前的碳平衡。确定控制当前碳平衡的过程将使首席研究员能够预测在预测的北极气候变化期间可能发生的变化。

ABSTRACT The receipient has been chosen for a National Science Foundation Presidential Faculty Fellow Award. The receipient will continue his research in the transport of carbon, nitrogen, phosphorus, and sulfur through Arctic tundra ecosystems to include both physical and geochemichal transport mechanisms and pathways. These studies will lead to a better understanding of broad environmental problems such as acid rain, eutrophication, species introductions, and climate change. The research will lead to a predictative capability for ecosystem function to show how organisms react to each other and to human-imposed change. Fundamental questions about geochemical cycling within organisms at both the regional and global scales will be examined. A novel technique involving the use of stable isotopes will be applied at the scale of entire ecosystems and will be used to estimate the current carbon balance in arctic ecosystems. Determination of the processes controlling the current carbon balance will allow the principal investigator to predict the changes that may occur during forecasted climate change in the arctic.