Forests sequester carbon dioxide from the atmosphere, storing it in wood. Northern hardwood forests are an important sink for anthropogenic emissions of CO2. These forests can be used as a tool to mitigate CO2 emissions, and their effect on our climate. To maximize carbon storage, we must understand how events impact the capacity, stability, vulnerability of the sink. In this talk, I describe work that links the long record of growth contained in tree rings to modern, indirect measures of carbon uptake such as satellite and flux tower monitoring. Using a measure I developed that focuses on wood accumulation in the canopy, a long-standing discrepancy between remote sensing, flux, and biometric data is resolved. The extended record of carbon storage also shows the impact of events like insect outbreaks on sequestration. These results can inform management practices and policy to ensure we make the best use of our forests.