University of California Press

Figure 2

Vertical profiles for bulk nutrient concentrations in sea ice cores. Vertical profiles for bulk concentrations (µmol L–1) of (a) NO3– (or NO3– + NO2–), (b) NH4+, (c) PO43–, and (d) Si(OH)4 as a function of normalized ice core depth (i.e., 100 × sampling depth / total ice thickness). Median concentrations are indicated by the blue dashed, red dashed-dotted, and green dotted lines for winter, spring, and summer, respectively. The data have been binned into 10% depth intervals. The interquartile ranges are represented by the colored-corresponding envelopes. Insufficient data were available for ammonium in winter (~ 12 per 10% depth intervals, collected in late winter only). DOI: https://doi.org/10.1525/elementa.217.f2

Vertical profiles for bulk nutrient concentrations in sea ice cores. Vertical profiles for bulk concentrations (µmol L^–1) of (a) NO₃^– (or NO₃^– + NO₂^–), (b) NH₄⁺, (c) PO₄^3–, and (d) Si(OH)₄ as a function of normalized ice core depth (i.e., 100 × sampling depth / total ice thickness). Median concentrations are indicated by the blue dashed, red dashed-dotted, and green dotted lines for winter, spring, and summer, respectively. The data have been binned into 10% depth intervals. The interquartile ranges are represented by the colored-corresponding envelopes. Insufficient data were available for ammonium in winter (~ 12 per 10% depth intervals, collected in late winter only). DOI: https://doi.org/10.1525/elementa.217.f2

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