University of California Press

Figure 1

δ13C and Δ14C signatures of POCsusp and DIC in the ocean. Data for POCsusp from Pacific Station M (bold dashes; Druffel et al., 1996) showed no trend, indicating a single source, surface primary production, to the POCsusp. The covariation in δ13C and Δ14C for POCsusp from the Mid-Atlantic Bight (MAB, open squares; Bauer et al., 2001, 2002) and Desoto Canyon in the Gulf of Mexico (solid triangles; Cherrier et al., 2014) indicates the incorporation of another carbon source. Data for DIC from MAB are from Bauer et al. (2001). For data fit to linear regression analysis for Desoto Canyon 2010–2011: y = 49.137x + 1277.5, r = 0.929, n = 18, p < 0.0001; for MAB 2002: y = 47.708x + 1081.4, r = 0.845, n = 106, p < 0.0001. DOI: https://doi.org/10.1525/elementa.389.f1

δ¹³C and Δ¹⁴C signatures of POC_susp and DIC in the ocean. Data for POC_susp from Pacific Station M (bold dashes; Druffel et al., 1996) showed no trend, indicating a single source, surface primary production, to the POC_susp. The covariation in δ¹³C and Δ¹⁴C for POC_susp from the Mid-Atlantic Bight (MAB, open squares; Bauer et al., 2001, 2002) and Desoto Canyon in the Gulf of Mexico (solid triangles; Cherrier et al., 2014) indicates the incorporation of another carbon source. Data for DIC from MAB are from Bauer et al. (2001). For data fit to linear regression analysis for Desoto Canyon 2010–2011: y = 49.137x + 1277.5, r = 0.929, n = 18, p < 0.0001; for MAB 2002: y = 47.708x + 1081.4, r = 0.845, n = 106, p < 0.0001. DOI: https://doi.org/10.1525/elementa.389.f1

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