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Monien, Donata; Monien, Patrick; Brünjes, Robert; Widmer, Tatjana; Kappenberg, Arne; Silva-Busso, Adrian A; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2017): Physical oceanography and meteorological measurements in Potter Cove, King George Island, West Antarctic Peninsula during austral summer 2010/2011 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.871606, Supplement to: Monien, D et al. (2017): Meltwater as a source of potentially bioavailable iron to Antarctica waters. Antarctic Science, 1-15, https://doi.org/10.1017/S095410201600064X

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Published: 2017-02-03 • DOI registered: 2017-02-03

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Abstract:
Recent rapid retreat of glacial front lines and the loss of land ice along the Antarctic margins may play an important role in exporting suspended particulate matter (SPM) potentially rich in bioavailable (defined as ascorbate leachable) iron (FeA) to coastal areas of the Southern Ocean. Sediment ablation is an additional source of iron for this high-nutrient low-chlorophyll region. In Potter Cove, King George Island, meltwater streams discharge up to 18 000 mg/l (average 283 mg/l) of slightly weathered, finely ground bedrock particles into coastal waters during the summer. Approximately 15% of this SPM is exported within a low-salinity surface plume into Bransfield Strait. Based on our data, an estimated 12 mg/m**2/yr of FeA is exported from the South Shetland Island land surface (ice-free and subglacial areas) to the surrounding coastal waters. Extrapolated to an area of 2.5x104 km**2, this FeA input is comparable to the contribution from icebergs and c. 240-fold higher than aeolian input via dust. An observed rise in local sediment accumulation rates suggests that glacial erosion has been increasing over recent decades and that (sub-)glacially derived SPM is becoming more important as a source of iron to the Southern Ocean.
Related to:
Image gallery of Potter Cove, King George Island, webcam 2 in 2010 [dataset]. https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Jubany/2010&t=Jubany+Station+in+2010&ID=730506
Image gallery of Potter Cove, King George Island, webcam 2 in 2011 [dataset]. https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Jubany/2011&t=Jubany+Station+in+2011&ID=773374
Project(s):
Impact of climate induced glacier melt on marine coastal systems, Antarctica (IMCOAST/IMCONet)
Coverage:
Median Latitude: -62.897852 * Median Longitude: -58.645408 * South-bound Latitude: -63.230000 * West-bound Longitude: -58.712743 * North-bound Latitude: -62.225590 * East-bound Longitude: -58.630000
Date/Time Start: 2010-01-02T12:00:00 * Date/Time End: 2011-12-31T12:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Servicio Meteorológico Nacional (2017): Meteorological data from Jubany Station, King George Island, Western Antarctic Peninsula, 2010. https://doi.org/10.1594/PANGAEA.758314
  2. Servicio Meteorológico Nacional (2017): Meteorological data from Jubany Station, King George Island, Western Antarctic Peninsula, 2011. https://doi.org/10.1594/PANGAEA.808250
  3. Monien, D; Monien, P; Schnetger, B et al. (2017): Physical oceanography at CTD stations in Potter Cove, King George Island, West Antarctic Peninsula during austral summer 2010/2011. https://doi.org/10.1594/PANGAEA.811942