Fischer, Michael; Thomas, David N; Krell, Andreas; Nehrke, Gernot; Göttlicher, Jörg; Norman, Marc D; Meiners, Klaus M; Riaux-Gobin, C; Dieckmann, Gerhard S (2013): Physico-chemical characteristics and ikaite content of brine and ice samples taken during SIPEX and DDU campaigns in East Antarctica, 2007. PANGAEA, https://doi.org/10.1594/PANGAEA.847684, Supplement to: Fischer, M et al. (2012): Quantification of ikaite in Antarctic sea ice. Antarctic Science, 25(03), 421-432, https://doi.org/10.1017/S0954102012001150
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Calcium carbonate precipitation in sea ice is thought to potentially drive significant CO2 uptake by the ocean. However, little is known about the quantitative spatial and temporal distribution of CaCO3 within sea ice, although it is hypothesized that high quantities of dissolved organic matter and/or phosphate (common in sea ice) may inhibit its formation. In this quantitative study of hydrous calcium carbonate as ikaite, sea ice cores and brine samples were collected from pack and land fast sea ice between September and December 2007 during two expeditions, one in the East Antarctic sector and the other off Terre Adélie. Samples were analysed for CaCO3, salinity, dissolved organic carbon/nitrogen, inorganic phosphate, and total alkalinity. No relationship between these parameters and CaCO3 precipitation was evident. Ikaite was found mostly in the uppermost layers of sea ice with maximum concentrations of up to 126 mg ikaite per litre melted sea ice being measured, although both the temporal and horizontal spatial distributions of ikaite were highly heterogeneous. The precipitate was also found in the snow on top of the sea ice at some of the sampling locations.
Median Latitude: -65.475553 * Median Longitude: 129.535979 * South-bound Latitude: -66.657780 * West-bound Longitude: 116.800000 * North-bound Latitude: -64.250000 * East-bound Longitude: 139.998330
Date/Time Start: 2007-09-11T00:00:00 * Date/Time End: 2007-12-05T00:00:00
Datasets listed in this publication series
- Fischer, M; Thomas, DN; Krell, A et al. (2013): (Supplement Table 1) Ikaite content in ice cores from land fast and sea ice in East Antarctica during the SIPEX and DDU campaigns in 2007. https://doi.org/10.1594/PANGAEA.847683
- Fischer, M; Thomas, DN; Krell, A et al. (2013): (Table 1) Air and ice temperatures during sea- and land fast-ice sampling of the SIPEX and DDU campaigns in 2007. https://doi.org/10.1594/PANGAEA.847681
- Fischer, M; Thomas, DN; Krell, A et al. (2013): (Table 2) Physico-chemical properties of brine collected from sackholes from land fast ice and from sea ice in East Antarctica during the SIPEX and DDU campaigns in 2007. https://doi.org/10.1594/PANGAEA.847682