Collaborative Research: The Northeastern Carbon Sink: Enhanced Growth, Regrowth, or Both?

合作研究：东北部碳汇：增强增长、再生，还是两者兼而有之？

• 批准号: 0614099
• 负责人: Christine Goodale
• 金额: $ 6.8万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0614099&HistoricalAwards=false
• 关键词: Collaborative; Research; Northeastern; Carbon; Sink

Carbon is accumulating in the trees of the US, thereby reducing further accumulation of CO2 to the atmosphere. Whether this accumulation will continue is uncertain, however, because it is not known how much of it is caused by enhanced rates of growth from environmental change (suggesting an increased carbon storage in the future), and how much of it is attributable simply to regrowth following earlier disturbances (suggesting a diminished accumulation in the future). This work seeks to determine the relative contributions of enhanced growth and regrowth to carbon accumulation in the forests of the Northeast. The question will be tackled from three directions: by analyzing the large but previously inaccessible data sets of the US Forest Inventory and Analysis (FIA); by comparison of these FIA data to model simulations of a forest carbon model (to test the hypothesis of enhanced growth); and by reanalyzing historical patterns of land use, management and disturbance (to test the regrowth hypothesis). The work addresses one of the primary goals of the US Climate Change Science Program to determine the magnitude and mechanisms for the accumulation of carbon. The work will also make accessible to the public the 50-year record of tree growth in the Northeast.

碳在美国的树木中积累，从而减少了进一步积累到大气中的二氧化碳。然而，这种积累是否会继续下去尚不确定，因为不知道其中有多少是由环境变化(表明未来碳储量增加)导致的增长率提高造成的，也不知道有多少是由于早先的干扰(表明未来积累减少)之后的再生长造成的。这项工作试图确定促进生长和再生长对东北森林碳积累的相对贡献。这个问题将从三个方向解决：通过分析美国森林调查和分析(FIA)的大型但以前无法获取的数据集；通过将这些FIA数据与森林碳模型的模型模拟进行比较(以检验促进增长的假说)；通过重新分析土地利用、管理和干扰的历史模式(以检验再生假说)。这项工作解决了美国气候变化科学计划的主要目标之一，即确定碳积累的规模和机制。这项工作还将向公众展示东北地区50年来树木生长的记录。