Soil Carbon Accumulation Under CO2 Enrichment (FACE)

这项研究将在自由空气二氧化碳交换(FACE)实验中检查土壤碳动态。Face技术通过将二氧化碳通过实验田周围的通风口泵送，提供了一个丰富的二氧化碳大气。这项技术避免了室内研究中温度升高和通风减少的混杂影响。这项研究将解决森林土壤/凋落物中碳输入和输出之间的平衡，并将比较土壤中的碳储存和周转试验和对照处理。大气中二氧化碳含量的增加预计会影响生态过程，但是，出于实验目的对大气二氧化碳的操纵一直受到技术限制的阻碍。新的Face技术提供了一个机会来研究二氧化碳浓缩对生态过程的影响。森林土壤有机质是主要的碳库。二氧化碳的浓缩可能会改变这个池子的周转，从而可能导致大气中碳的进一步积累。因此，这项研究将大大提高我们对全球变化后果的理解。

This research will examine soil carbon dynamics in a free-air carbon dioxide exchange (FACE) experiment. FACE technology provides an enriched carbon dioxide atmosphere by pumping carbon dioxide through vents surrounding experimental plots. This technique avoids confounding effects of increased temperature and reduced ventilation in chamber studies. This study will address the balance between carbon inputs and outputs in forest soil/litter and will compare carbon storage and turnover in soil between experimental and control treatments. %%% Increased carbon dioxide content of the atmosphere is expected to influence ecological processes, but manipulation of atmospheric carbon dioxide for experimental purposes has been hampered by technical limitations. The new FACE technology offers an opportunity to examine effects of carbon dioxide enrichment on ecological processes. Forest soil organic matter represents a major pool of carbon. Carbon dioxide enrichment likely will alter turnover of this pool with potential consequences for further carbon accumulation in the atmosphere. Therefore, this research will substantially improve our understanding of consequences of global change.