Unknown
PANGAEA
In:
Supplement to: Nedashkovsky, A P; Khvedynich, S V; Petrovsky, T V (2009): Alkalinity of sea ice in the high-latitudinal Arctic according to the surveys performed at North Pole Drifting Station 34 and characterization of the role of the Arctic ice in the CO2 exchange. Oceanology, 49(1), 55-63, https://doi.org/10.1134/S000143700901007X
Publication Date:
2023-03-16
Description:
Variability of total alkalinity in sea ice of the high-latitudinal Arctic from November 2005 to May 2006 is considered. For the bulk of one- and two-year sea ice, alkalinity dependence on salinity is described as TA = k x Sal, where k is salinity/alkalinity ratio in under-ice water. The given relationship is valid within a wide range of salinity from 0.1 psu in desalinated fraction of two-year ice to 36 psu in snow on the young ice surface. Geochemically significant deviations from the relationship noted were observed exclusively in snow and the upper layer of one-year ice. In the upper layer of one-year ice, deficiency of alkalinity is observed ( delta TA ~= -0.07 mEq/kg, or -15%). In snow on the surface of the one-year ice, alkalinity excess is formed under desalination ( delta TA is as high as 1.3 mEq/kg, or 380%). Deviations registered are caused by possibility of carbonate precipitation in form of CaCO3 x 6H2O under seawater freezing. It is shown that ice formation and the following melting might cause losses of atmospheric CO2 of up to 3 x 10**12 gC/year.
Keywords:
Archive of Ocean Data; ARCOD; Arctic Ocean; Event label; Ice drift station; Latitude of event; Longitude of event; Number; SEAICEC; Sea ice corer; Sea ice observation; Sea ice thickness; Snow thickness; SP-34; SP-34-10; SP-34-11; SP-34-12; SP-34-13; SP-34-14; SP-34-15; SP-34-16; SP-34-17; SP-34-18; SP-34-19; SP-34-20; SP-34-21; SP-34-22; SP-34-4; SP-34-5; SP-34-6; SP-34-7; SP-34-8; SP-34-9; Thickness
Type:
Dataset
Format:
text/tab-separated-values, 76 data points
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