OPUS: Human Modification of the Terrestrial Carbon Balance

由于砍伐森林而释放到大气中的碳量（碳源）和生长中的森林所吸收的碳量（碳汇）影响大气中二氧化碳的浓度，从而影响气候。在过去的25年里，霍顿和他的同事们计算了土地利用变化（包括砍伐森林、重新造林、砍伐木材和火灾管理）导致的土地和大气之间的碳交换。这项建议力求将这项工作综合成一个全球框架。这项工作将产生两篇综述文章和两个数据集。综述文章将综合用于计算碳源和汇的数据中的不确定性和偏差。这些数据集将包括：第一，1850-2000年期间全球土地利用变化率、碳储量和年碳通量的注释表；第二，显示这些碳源和碳汇位置的一系列地图。这些评论和数据集将引起学生和全球碳/气候界的知名研究者，包括建模者的兴趣。历史模式和当前土地利用变化导致的碳排放在碳循环评估中经常被提及，例如IPCC报告中的那些，并且是能源部二氧化碳信息和分析中心（CDIAC）最受欢迎的数据集之一。趋势吗?报告。这些数据集将通过橡树岭国家实验室的CDIAC提供给科学界。研究结果将对决策者考虑与土地利用有关的碳封存方案非常重要。

The amount of carbon released to the atmosphere as a result of deforestation (carbon source) and the amount taken up by growing forests (carbon sink) affect the concentration of CO2 in the atmosphere and, hence, climate. Over the last 25 years Houghton and colleagues have calculated the exchanges of carbon between land and the atmosphere that result from land-use change, including deforestation, reforestation, wood harvest, and fire management. This proposal seeks to synthesize that work into a global framework. The work will result in two review articles and two data sets. The review articles will synthesize the uncertainties and biases in the data used to calculate carbon sources and sinks. The data sets will include, first, an annotated tabulation of rates of land-use change, carbon stocks, and annual carbon fluxes, globally, for the period 1850-2000, and, second, a series of maps indicating the location of those sources and sinks of carbon. The reviews and data sets will be of interest to students and established investigators of the global carbon/climate community, including modelers. The historic pattern as well as current emissions of carbon from land-use change are regularly referred to in assessments of the carbon cycle, such as those in the IPCC reports, and are one of the most popular data sets in the Department of Energy's Carbon Dioxide Information and Analysis Center (CDIAC) ?Trends? report. The data sets will be made available to the scientific community through CDIAC at Oak Ridge National Laboratory. The results will be very relevant to policy makers considering land-use related options for sequestering carbon.