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  • Ross Sea  (3)
  • Ammonium; Ammonium, standard deviation; Auto-analyzer II, Technicon; Carbon, organic, particulate; Carbon, organic, particulate, integrated; Carbon, organic, particulate, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; CORSACS II; DATE/TIME; Date/time end; Event label; International Polar Year (2007-2008); IPY; Mass spectrometer Finnigan MAT 252; Nathaniel B. Palmer; NBP0608; NBP0608_all; NBP9807; NBP9807_all; NBP9807_early; NBP9807_late; Nitrate; Nitrate, standard deviation; Nitrite; Nitrite, standard deviation; Nitrogen, inorganic; Nitrogen, inorganic, standard deviation; Nitrogen, particulate; Nitrogen, particulate, standard deviation; Phosphate; Phosphate, standard deviation; ROAVERRS; Ross Sea; Salinity, brine; Salinity, standard deviation; Sample amount, subset; Sample type; Silicate; Silicate, standard deviation; SNOW; Snow/ice sample; δ13C, carbon dioxide, atmospheric; δ13C, carbon dioxide, standard deviation; δ13C, particulate organic carbon; δ13C, standard deviation  (1)
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  • 1
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    (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 (2010)
    PANGAEA
    In:  Supplement to: Munro, David R; Dunbar, Robert B; Mucciarone, David A; Arrigo, Kevin R; Long, Matthew C (2010): Stable isotope composition of dissolved inorganic carbon and particulate organic carbon in sea ice from the Ross Sea, Antarctica. Journal of Geophysical Research, 115(C9), C09005, https://doi.org/10.1029/2009JC005661
    Details
    Publication Date: 2024-05-22
    Description: 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, although brine volumes are low in very cold ice that supports these brines. Brine d13C(sum CO2) ranged from -2.6 to +8.0 per mil while d13C(POC) ranged from -30.5 to -9.2 per mil. Isotopic enrichment of the sum CO2 pool via net community production accounts for some but not all carbon isotopic enrichment of sea ice POC. Comparisons of s sum CO2, d13C(sum CO2), and d13C(POC) within sea ice suggest that epsilon p (the net photosynthetic fractionation factor) for sea ice algae is ~8 per mil smaller than the epsilon p observed for phytoplankton in open water regions of the Ross Sea. These results have implications for modeling of carbon uptake and transformation in the ice-covered ocean and for reconstruction of past sea ice extent based on stable isotopic composition of organic matter in sediment cores.
    Keywords: Ammonium; Ammonium, standard deviation; Auto-analyzer II, Technicon; Carbon, organic, particulate; Carbon, organic, particulate, integrated; Carbon, organic, particulate, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; CORSACS II; DATE/TIME; Date/time end; Event label; International Polar Year (2007-2008); IPY; Mass spectrometer Finnigan MAT 252; Nathaniel B. Palmer; NBP0608; NBP0608_all; NBP9807; NBP9807_all; NBP9807_early; NBP9807_late; Nitrate; Nitrate, standard deviation; Nitrite; Nitrite, standard deviation; Nitrogen, inorganic; Nitrogen, inorganic, standard deviation; Nitrogen, particulate; Nitrogen, particulate, standard deviation; Phosphate; Phosphate, standard deviation; ROAVERRS; Ross Sea; Salinity, brine; Salinity, standard deviation; Sample amount, subset; Sample type; Silicate; Silicate, standard deviation; SNOW; Snow/ice sample; δ13C, carbon dioxide, atmospheric; δ13C, carbon dioxide, standard deviation; δ13C, particulate organic carbon; δ13C, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 404 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Iron supply and demand in an Antarctic shelf ecosystem (2015)
    John Wiley & Sons
    Details
    Publication Date: 2022-05-25
    Description: © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Geophysical Research Letters 42 (2015): 8088–8097, doi:10.1002/2015GL065727.
    Description: The Ross Sea sustains a rich ecosystem and is the most productive sector of the Southern Ocean. Most of this production occurs within a polynya during the November–February period, when the availability of dissolved iron (dFe) is thought to exert the major control on phytoplankton growth. Here we combine new data on the distribution of dFe, high-resolution model simulations of ice melt and regional circulation, and satellite-based estimates of primary production to quantify iron supply and demand over the Ross Sea continental shelf. Our analysis suggests that the largest sources of dFe to the euphotic zone are wintertime mixing and melting sea ice, with a lesser input from intrusions of Circumpolar Deep Water and a small amount from melting glacial ice. Together these sources are in approximate balance with the annual biological dFe demand inferred from satellite-based productivity algorithms, although both the supply and demand estimates have large uncertainties.
    Keywords: Iron ; Ross Sea ; Biogeochemical cycling
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Format: application/msword
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    PAPER (OA)
  • 3
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    NetCDF output for 8 stations using the circum-Antarctic biological model (CIAO) using model output of dFe dyes & physics as input. (2021)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publication Date: 2022-10-31
    Description: Dataset: Antarctic Biological Model Output
    Description: NetCDF output for 8 stations using the circum-Antarctic biological model (CIAO). Two different scenarios were run, one where meltwater from ice shelves were a source of iron (20 nM) and one where meltwater from ice shelves were set to 0. A previous calculated model (see related dataset) was used as input. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/858663
    Description: NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) OPP-1643618
    Keywords: Southern Ocean ; Ross Sea ; Amundsen Sea ; Pine Island Bay ; Polynyas ; Ice shelves ; Glaciers ; Meltwater ; Iron ; Diatoms ; Phaeocystis antarctic ; Primary production
    Repository Name: Woods Hole Open Access Server
    Type: Dataset
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 4
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    Early season depletion of dissolved iron in the Ross Sea polynya : implications for iron dynamics on the Antarctic continental shelf (2012)
    American Geophysical Union
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 116 (2011): C12019, doi:10.1029/2010JC006553.
    Description: The Ross Sea polynya is among the most productive regions in the Southern Ocean and may constitute a significant oceanic CO2 sink. Based on results from several field studies, this region has been considered seasonally iron limited, whereby a “winter reserve” of dissolved iron (dFe) is progressively depleted during the growing season to low concentrations (~0.1 nM) that limit phytoplankton growth in the austral summer (December–February). Here we report new iron data for the Ross Sea polynya during austral summer 2005–2006 (27 December–22 January) and the following austral spring 2006 (16 November–3 December). The summer 2005–2006 data show generally low dFe concentrations in polynya surface waters (0.10 ± 0.05 nM in upper 40 m, n = 175), consistent with previous observations. Surprisingly, our spring 2006 data reveal similar low surface dFe concentrations in the polynya (0.06 ± 0.04 nM in upper 40 m, n = 69), in association with relatively high rates of primary production (~170–260 mmol C m−2 d−1). These results indicate that the winter reserve dFe may be consumed relatively early in the growing season, such that polynya surface waters can become “iron limited” as early as November; i.e., the seasonal depletion of dFe is not necessarily gradual. Satellite observations reveal significant biomass accumulation in the polynya during summer 2006–2007, implying significant sources of “new” dFe to surface waters during this period. Possible sources of this new dFe include episodic vertical exchange, lateral advection, aerosol input, and reductive dissolution of particulate iron.
    Description: This research was supported by U.S. National Science Foundation awards OPP-0338164 to PNS, OPP- 0338350 to RBD, OPP-0440840 to MAS, OPP-0338157 to WOS, and OPP-0338097 to GRD.
    Description: 2012-06-15
    Keywords: Ross Sea ; Iron ; Phytoplankton
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
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