Corrigendum to “An Investigation of size-fractionated organic matter from Lake Superior and a tributary stream using radiocarbon, stable isotopes, and NMR” by Zigah, P.K., Minor, E.C., Abdullah, H.A.N., Werne, J.P. and Hatcher, P.G. A reanalysis using recent radiocarbon blank information [Geochim. Cosmochim. Acta 127 (2014) 264–284](S0016703713006765)(10.1016/j.gca.2013.11.037)

Elizabeth C. Minor, Ann P. McNichol, Prosper K. Zigah, Josef P. Werne

Research output: Contribution to journalComment/debate

Abstract

This paper applies new information concerning the process blank for radiocarbon analysis of dissolved organic carbon using UV-oxidation and subsequent accelerator mass spectrometry analysis. Recent analyses at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) Facility show that reported values for such samples should be updated to reflect a process blank of 22 ± 6 micrograms of carbon with a fraction modern of 0.3 ± 0.2. The effects of this blank upon δ13C were also assessed and found to be generally less than 0.2‰. While this process blank does not change interpretations of stable carbon isotope results, it does affect interpretations of carbon cycling in Lake Superior, with the lake's bulk dissolved organic carbon (Bulk DOC, <0.7 µm), initial DOC (Init DOC, <0.2 μm) and low molecular weight DOC (LMW DOC, <1000 kDa) appearing more enriched in bomb radiocarbon than previously reported. This paper also applies a previously published process blank to particulate organic carbon data, and this application generally, but not always, leads to more enriched Δ14C values.

Original languageEnglish (US)
Pages (from-to)711-718
Number of pages8
JournalGeochimica et Cosmochimica Acta
Volume269
DOIs
StatePublished - Jan 15 2020
Externally publishedYes

    Fingerprint

Cite this