RAPID: Immediate Post-Fire Carbon Balance of Boreal Peat-Wetland Mosaics

由于气候变暖，多年冻土或永久冻土在苔原和北方环境中融化。在一个更温暖的世界里，火灾也变得越来越频繁和激烈，影响了这些景观如何与大气交换温室气体。虽然以前的研究都是在火灾后进行的，但这项研究将提供对同一地点火灾前后生态系统功能的了解。该研究将在加拿大西北地区的一个北方森林泥炭地的温室气体测量点进行，该泥炭地位于永久冻土和邻近的湿地之下，该湿地于2022年10月燃烧。该网站有一个9年的数据记录的二氧化碳，甲烷和水交换之间的土地和大气。这项研究将涉及与管理研究地点的第一民族-肯尼亚第一民族的密切工作关系。人们对北方生态系统中永冻层融化和火灾的共同影响知之甚少。随着火灾在高纬度生态系统中变得越来越普遍和严重，了解火灾和永久冻土融化的联合反应对于了解陆地-大气碳交换至关重要。加拿大西北地区的一个碳通量监测点于2022年10月被烧毁，这为研究同一景观的火灾前后通量提供了难得的机会。研究人员将重建碳通量监测塔，以测量二氧化碳和甲烷的陆地-大气交换，并进行一系列环境测量，以了解火灾前后是什么驱动了碳通量。研究人员将与负责管理该研究基地的美国第一民族合作，这种合作将促进科学家和第一民族人民之间的强有力的知识交流。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Due to climate warming, perennially frozen soil, or permafrost, is thawing in tundra and boreal environments. Fires are also becoming more frequent and intense in a warmer world, affecting how these landscapes exchange greenhouse gasses with the atmosphere. While previous studies have been conducted after fire, this study will provide an understanding of ecosystem function, both before and after fire at the same site. The study will take place at a greenhouse gas measuring site in a boreal forest peatland underlain by permafrost and adjacent wetlands in the Northwest Territories, Canada, that burned in October 2022. The site has a 9- year data record of carbon dioxide, methane, and water exchange between the land and the atmosphere. The study will involve a close working relationship with the Łı́ı́dlı̨ı̨ Kų́ę́ First Nation, who run the research site. The co-impacts of permafrost thaw and fire in boreal ecosystems is poorly understood. With fires becoming more common and severe in high-latitude ecosystems, understanding the joint response of fire and permafrost thaw is vital to understanding the land-atmosphere exchange of carbon. A carbon flux monitoring site in the Northwest Territories, Canada, was burned in October 2022, presenting a rare opportunity to study pre- and post-fire fluxes over the same landscape. The investigators will rebuild the carbon flux monitoring tower to measure the land-atmosphere exchange of carbon dioxide and methane, and a suite of environmental measurements to understand what drives fluxes before and after fire. The investigators will collaborate with the Łı́ı́dlı̨ı̨ Kų́ę́ First Nation, who run the research site, and the collaboration will foster a strong knowledge exchange between the scientists and the First Nations peoples.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.