Summary: | Dissolved organic carbon (DOC) in the ocean is thousands of 14C years old, yet a portion of the DOC cycles on much shorter time scales (days to decades). We present 14C measurements of DOC in the Arctic Ocean and estimate that ‰ of the DOC in the deep Eurasian basin contains bomb 14C. While this is a limited dataset, there appears to be selective loss of modern DOC in the surface and halocline waters of the open Beaufort Sea versus the Beaufort slope. At one of the Beaufort Sea stations, there is a linear relationship between DOC Δ14C values and previously measured total hydrolysable amino acid concentrations as reported by Shen et al. (2012), indicating that deep DOC contains small amounts of bioavailable DOC. The 14C data show that not all of the deep DOC is recalcitrant. Please cite data using citation: Druffel, E. R. M., S. Griffin, C. Glynn, R. Benner and B.D. Walker (2017), Accepted 13 Feb 2017 Radiocarbon in dissolved organic and inorganic carbon of the Arctic Ocean, Geophys. Res. Lett., 44, DOI:10.1002/2016GL072138. Samples collected on RV Oden on August 27, 2012 by Peter Sylvander. Note: All samples between 20 and 500 m depth were filtered directly from the niskins using GFF filters.
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