PostDoctoral Research Fellowship

这是一个博士后奖学金。研究者将研究地表能量收支，以提高我们对阿拉斯加北部林木线树木生长控制的理解。树线位置对高纬度地区地表生态、大气环流和微量气体交换具有重要意义。为了验证土壤水分和氮的有效性对树线环境中沿水文连续体的树木生长施加直接和间接控制的假设，将对土壤水分和氮的预算进行操纵，以检查它们的相互作用及其对树线生长的影响。这项研究的预期结果将提高我们在气候变化中预测树木线变化的能力。

This award is for a postdoctoral fellowship. The investigator will study the surface energy budget to improve our understanding of the controls on tree growth at the treeline in northern Alaska. Treeline positions have important implications for the surface ecology, the atmospheric circulation, and trace gas exchange in high-latitude landscapes. To test the hypothesis that soil water and nitrogen availability exert direct and indirect controls on tree growth along the hydrologic continuum in treeline environments, the soil moisture and nitrogen budgets will be manipulated to examine their interaction and their implications for growth at the treeline. The results that can be expected from this study would improve our ability to predict treeline shifts in a changing climate.