Collaborative Research: A Measurement Program in Siberia to Assess Disturbance-Driven Changes in Arctic Carbon Fluxes (RAISE)

合作研究：西伯利亚评估干扰驱动的北极碳通量变化的测量计划 (RAISE)

• 批准号: 0099113
• 负责人: F. Stuart Chapin
• 金额: $ 51.9万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099113&HistoricalAwards=false
• 关键词: Collaborative; Research; Measurement; Program; Siberia

This project involves conducting a field measurements program near Cherski, Siberia to quantify the impacts of disturbance on the seasonal cycle of atmospheric carbon dioxide and the discharge of carbon and nitrogen into the Arctic Ocean in forest and shrubby tundra regions. Coastal plain tundra in the region has accumulated large stores of carbon in sediments during the Pleistocene that has been slowly released to the atmosphere and ocean through melting of previously frozen soils during the Holocene. Disturbance, particularly forest fires, of the vegetation exposes the soils to accelerated carbon loss through more direct exposure to erosion. The study will compare an undisturbed region to recently disturbed areas and determine the effects of changes in temperature and hydrology on the rate of carbon flux. The results will be utilized in models to examine possible future disturbance effects, particularly those that could be accelerated by warmer climate conditions.

该项目涉及在西伯利亚切尔斯基附近进行实地测量，以量化干扰对大气二氧化碳季节性循环的影响以及森林和灌木苔原地区向北冰洋排放碳和氮的影响。 该地区的沿海平原苔原在更新世期间在沉积物中积累了大量的碳，这些碳在全新世期间通过先前冻结的土壤融化而缓慢释放到大气和海洋中。 植被的破坏，特别是森林火灾，使土壤更直接地受到侵蚀，从而加速碳的流失。 这项研究将比较未受干扰的地区和最近受干扰的地区，并确定温度和水文变化对碳通量率的影响。 研究结果将用于模型，以研究未来可能的扰动效应，特别是那些可能因气候变暖而加速的扰动效应。