(Table 1) Nutrient concentrations and carbon isotopes of sea ice segments and brine sampled during Nathaniel B. Palmer cruises NBP98-07 and NBP06-08, Ross Sea ...

• Main Authors: Munro, David R, Dunbar, Robert B, Mucciarone, David A, Arrigo, Kevin R, Long, Matthew C
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Event label; Sample type; DATE/TIME; Date/time end; Sample amount, subset; Salinity, brine; Salinity, standard deviation; δ13C, carbon dioxide, atmospheric; δ13C, carbon dioxide, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Silicate; Silicate, standard deviation; Phosphate; Phosphate, standard deviation; Nitrate; Nitrate, standard deviation; Nitrite; Nitrite, standard deviation; Ammonium; Ammonium, standard deviation; Nitrogen, inorganic; Nitrogen, inorganic, standard deviation; δ13C, particulate organic carbon; δ13C, standard deviation; Carbon, organic, particulate; Carbon, organic, particulate, standard deviation; Nitrogen, particulate; Nitrogen, particulate, standard deviation; Carbon, organic, particulate, integrated; Snow/ice sample; Mass spectrometer Finnigan MAT 252; Auto-analyzer II, Technicon; NBP0608; NBP9807; Nathaniel B. Palmer; International Polar Year 2007-2008 IPY; Antarc*; Antarctica; International Polar Year; IPY; Ross Sea; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.817328; https://doi.pangaea.de/10.1594/PANGAEA.817328

We examined controls on the carbon isotopic composition of sea ice brines and organic matter during cruises to the Ross Sea, Antarctica in November/December 1998 and November/December 2006. Brine samples were analyzed for salinity, nutrients, total dissolved inorganic carbon (sum CO2), and the 13C/12C ratio of Sum CO2 (d13C(sum CO2)). Particulate organic matter from sea ice cores was analyzed for percent particulate organic carbon (POC), percent total particulate nitrogen (TPN), and stable carbon isotopic composition (d13C(POC)). Sum CO2 in sea ice brines ranged from 1368 to 7149 µmol/kg, equivalent to 1483 to 2519 µmol/kg when normalized to 34.5 psu salinity (s sum CO2), the average salinity of Ross Sea surface waters. Sea ice primary producers removed up to 34% of the available sum CO2, an amount much higher than the maximum removal observed in sea ice free water. Carbonate precipitation and CO2 degassing may reduce s sum CO2 by a similar amount (e.g., 30%) in the most hypersaline sea ice environments, ... : Values given as 'raw' values and normalized to 34.5 psu salinity. Depth-integrated POC represents the mean of all cores at each station. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...