Data for paleoclimatic analysis of carbon age-offset in Burial and E5 lakes, Alaska (1998-2025)

The stability of arctic permafrost and the carbon it contains are currently threatened by a rapidly warming climate yet the effect of varying climate conditions on erosion and transport of permafrost soils remain unclear. The organic carbon (OC) stored in frozen permafrost soil degrades and ages prior to being transported via fluvial, hillslope, and lakeshore processes or carried by subsurface flow through the active layer and deposited into a lake. This source of OC introduces a component of the lake sediment carbon that is older than the depositional age of the sediment. As a result, the variation in the range of radiocarbon (14C) ages (herein age-offsets) of OC in lake sediment through time can document changes in the relative amount of permafrost-derived OC that was incorporated into the lake sediment. The data in the attached .CSV files was used to examine the relationship between climate, erosion, subsurface hydrology, primary productivity and carbon mobility in the catchments of Burial and E5 lakes in arctic Alaska. Both lakes are underlain by continuous permafrost and have a rich set of paleoclimate proxy data that comprise an approximately 40 thousand year (ka) record of climate and environmental change.
The tabular data (csv) for paired and ramped pyrolysis-oxidation (RPO) based analysis of age offset in Burial and E5 lakes, following the work of:
Sinon, H., Abbott, M., Shelef, E., Rosenheim, B., Firesinger, D., Griffore, M., Finkenbinder, M., Finney, B. and Edwards, M., 2025. Radiocarbon age-offset measurements reveal shifts in the transport mechanism and age of permafrost-derived organic carbon from Burial Lake, arctic Alaska from MIS 3 to present. Quaternary Science Reviews, 347, p.109083.
A paper about lake E5 is in revision.
Sinon, H., Abbott, M., Rosenheim B., Firesinger D., Tracey, H., Shelef, E., Finney, B. A 45 Thousand Year Record of Aged Carbon Dynamics in Arctic Alaska Identified Using Radiocarbon Age-Offset from Lake E5. Submitted to: Arctic Science.