Global Change in C-N-P-S Coupled Biogeochemical Cycles in the Land-Coastal Margin System

9316133麦肯齐拟议研究的主要目标是在十年至千年的时间尺度上评估陆地-沿海边缘系统中碳、氮、磷和硫的耦合生物地球化学循环对气候和全球变化的响应，以及这一系统对全球环境变化的贡献。这个系统在未来将是世界上受人类活动干扰最严重的系统之一。由于陆地-海岸边缘系统的高度复杂性，有必要对各个生态系统的观测方案加以补充，在全球范围内对该系统的行为进行数据合成和建模。在此，我们提出了一个研究计划，以“帮助”完成这项任务。碳、氮、磷和硫是有机物质的四个主要组成部分(不包括氧和氢)，它们被海洋浮游生物和陆地植被以一定的比例结合在一起，即所谓的红场比率。因此，在全球变化和生物应对变化的背景下，研究地球-地表系统的这些基本组成部分是很重要的。

9316133 Mackenzie The main goals of the proposed research are to evaluate responses of the coupled carbon, nitrogen, phosphorus and sulfur biogeochemical cycles to climate and global change in the land- coastal margin system on decadal to millennial time scales, and the contribution of this system to global environmental change. This system will be in the future one of the world's most disturbed because of human activities. Because of the great complexity of the land-coastal margin system, it is necessary that observational programs for individual ecosystems be complemented by data synthesis and modeling of behavior of the system on a global scale. Herein we propose a research program to "aid" in the accomplishment of this task. Carbon, nitrogen, phosphorus and sulfur are the four main building blocks (excluding oxygen and hydrogen) of organic matter, and they are incorporated within certain proportions, known as the Redfield ratios, by marine plankton and terrestrial vegetation. Thus, study of these elemental components of the Earth-surface system is important in the context of global change and biotic responses to change.