Collaborative Research: Biogeochemical Controls of Post-Glacial Carbon Cycle and Rise in Atmospheric Carbon Dioxide

该奖项是为了支持对冰川后碳循环作为非稳态系统的研究，其中碳包括两个稳定同位素12C和13C，与氮(N)和磷(P)的营养循环耦合，在地球表面系统的四个主要领域：陆地，大气，海岸带和开放海洋（包括后两个领域的沉积物）。该项目是夏威夷大学（Mackenzie）和西北大学（Lerman）的合作项目。这项工作将以主要研究人员开发的建模方法为基础，该方法在过去300年的碳-氮-磷-硫耦合循环研究中取得了一些成功，当时该系统受到人类环境强迫和温度上升的影响。从末次盛冰期（LGM）到工业时代开始的较长时期内，四域和耦合C-N-P生物地球化学循环的新模型将包括13C的过去变化和空间分布（有效地将碳循环划分为12C和13C循环），以及系统内储层数量和结构的变化以及动力学参数。这些基本特征的变化应该能使我们对那段时间内地球表面系统的主要变化有一个近似的估计。

This award is for support of a study of the post-glacial carbon cycle as a non-steady state system, where carbon includes the two stable isotopes 12C and 13C, coupled to the nutrient cycles of nitrogen (N) and phosphorus (P), in the four major domains of the Earth's surface system: land, atmosphere, coastal zone, and open ocean (including the sediments of these latter two domains). The project is a collaborative one between the University of Hawaii (Mackenzie) and Northwestern University (Lerman). The work will be based on the modeling approach that the principal investigators developed and used with some success in the study of the coupled carbon-nitrogen-phosphorus-sulfur cycles in the past 300 years, when the system was subjected to human environmental forcings and a rise in temperature. A new model of the four domains and coupled C-N-P biogeochemical cycles for the analysis of the longer period since the LGM (last glacial maximum) to the start of the Industrial Age will include past changes and spatial distributions of 13C (effectively separating the carbon cycle into the 12C and 13C cycles), and modifications of the numbers and structure of the reservoirs within the system, and the kinetic parameters. These fundamental feature changes should allow close approximation of the major changes of the Earth's surface system in that period of time.