Six years of ecosystem-atmosphere greenhouse gas fluxes measured in a sub-boreal forest

Carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O) are the greenhouse gases largely responsible for anthropogenic climate change. Natural plant and microbial metabolic processes play a major role in the global atmospheric budget of each. We have been studying ecosystem-atmosphere trace gas exchange at a sub-boreal forest in the northeastern United States for over two decades. Historically our emphasis was on turbulent fluxes of CO(2) and water vapor. In 2012 we embarked on an expanded campaign to also measure CH(4) and N(2)O. Here we present continuous tower-based measurements of the ecosystem-atmosphere exchange of CO(2) and CH(4), recorded over the period 2012–2018 and reported at a 30-minute time step. Additionally, we describe a five-year (2012–2016) dataset of chamber-based measurements of soil fluxes of CO(2), CH(4), and N(2)O (2013–2016 only), conducted each year from May to November. These data can be used for process studies, for biogeochemical and land surface model validation and benchmarking, and for regional-to-global upscaling and budgeting analyses.