Ontology highlight
ABSTRACT:
SUBMITTER: Schwab MS
PROVIDER: S-EPMC7757186 | biostudies-literature | 2020 Dec
REPOSITORIES: biostudies-literature
Schwab Melissa S MS Hilton Robert G RG Raymond Peter A PA Haghipour Negar N Amos Edwin E Tank Suzanne E SE Holmes Robert M RM Tipper Edward T ET Eglinton Timothy I TI
Geophysical research letters 20201208 23
Permafrost thaw in Arctic watersheds threatens to mobilize hitherto sequestered carbon. We examine the radiocarbon activity (F<sup>14</sup>C) of dissolved organic carbon (DOC) in the northern Mackenzie River basin. From 2003-2017, DOC-F<sup>14</sup>C signatures (1.00 ± 0.04; <i>n</i> = 39) tracked atmospheric <sup>14</sup>CO<sub>2</sub>, indicating export of "modern" carbon. This trend was interrupted in June 2018 by the widespread release of aged DOC (0.85 ± 0.16, <i>n</i> = 28) measured across ...[more]