Export of calcium carbonate corrosive waters from the East Siberian Sea

Leif G. Anderson, Jörgen Ek, Ylva Ericson, Christoph Humborg, Igor Semiletov, Marcus Sundbom, Adam Ulfsbo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Siberian shelf seas are areas of extensive biogeochemical transformation of organic matter, both of marine and terrestrial origin. This in combination with brine production from sea ice formation results in a cold bottom water of relative high salinity and partial pressure of carbon dioxide (pCO2). Data from the SWERUS-C3 expedition compiled on the icebreaker Oden in July to September 2014 show the distribution of such waters at the outer shelf, as well as their export into the deep central Arctic basins. Very high pCO2 water, up to ∼ 1000 μatm, was observed associated with high nutrients and low oxygen concentrations. Consequently, this water had low saturation state with respect to calcium carbonate down to less than 0.8 for calcite and 0.5 for aragonite. Waters undersaturated in aragonite were also observed in the surface in waters at equilibrium with atmospheric CO2; however, at these conditions the cause of under-saturation was low salinity from river runoff and/or sea ice melt. The calcium carbonate corrosive water was observed all along the continental margin and well out into the deep Makarov and Canada basins at a depth from about 50 m depth in the west to about 150 m in the east. These waters of low aragonite saturation state are traced in historic data to the Canada Basin and in the waters flowing out of the Arctic Ocean north of Greenland and in the western Fram Strait, thus potentially impacting the marine life in the North Atlantic Ocean.

Original languageEnglish
Pages (from-to)1811-1823
Number of pages13
JournalBiogeosciences
Volume14
Issue number7
DOIs
Publication statusPublished - 5 Apr 2017

Fingerprint

calcium carbonate
basins
aragonite
Arctic region
ice
water
carbon dioxide
Canada
salinity
saturation
calcite
water distribution
Greenland
sea ice
Atlantic Ocean
basin
surface water
runoff
organic matter
oxygen

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes

Cite this

Anderson, L. G., Ek, J., Ericson, Y., Humborg, C., Semiletov, I., Sundbom, M., & Ulfsbo, A. (2017). Export of calcium carbonate corrosive waters from the East Siberian Sea. Biogeosciences, 14(7), 1811-1823. https://doi.org/10.5194/bg-14-1811-2017

Export of calcium carbonate corrosive waters from the East Siberian Sea. / Anderson, Leif G.; Ek, Jörgen; Ericson, Ylva; Humborg, Christoph; Semiletov, Igor; Sundbom, Marcus; Ulfsbo, Adam.

In: Biogeosciences, Vol. 14, No. 7, 05.04.2017, p. 1811-1823.

Research output: Contribution to journalArticle

Anderson, LG, Ek, J, Ericson, Y, Humborg, C, Semiletov, I, Sundbom, M & Ulfsbo, A 2017, 'Export of calcium carbonate corrosive waters from the East Siberian Sea', Biogeosciences, vol. 14, no. 7, pp. 1811-1823. https://doi.org/10.5194/bg-14-1811-2017
Anderson, Leif G. ; Ek, Jörgen ; Ericson, Ylva ; Humborg, Christoph ; Semiletov, Igor ; Sundbom, Marcus ; Ulfsbo, Adam. / Export of calcium carbonate corrosive waters from the East Siberian Sea. In: Biogeosciences. 2017 ; Vol. 14, No. 7. pp. 1811-1823.
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