Chemical fractionation in sea ice and glacier ice

• Main Authors: GJESSING, Yngvar, HANSSEN-BAUER, Inger, FUJII, Yoshiyuki, KAMEDA, Takao, KAMIYAMA, Kokichi, KAWAMURA, Toshiyuki
• Language: English
• Published: 日本雪氷学会
• Subjects: Fram Strait; ice core; Sea ice
• Online Access: https://kitami-it.repo.nii.ac.jp/record/7179/files/5114.pdf

Analyses of SO^<2->_4, Na^+，Cl^-，Mg^<2+> and Ca^<2+>in ice core samples of multiyear sea ice in the Fram Strait show strong correlations between the concentrations of Mg^<2+>，Na^+，Cl^- and Ca^<2+>（r=0・99）while the correlation coefficients between these ions and SO^<2->_4 were less than O．9．Most samples had a deficit of sulfate relative to sea water of the same salinity. Excess sulfate was found in a few samples with low salinities．Chemical analyses of snow，ice and meltwater from temperate glaciers have demonstrated that sulfate is more efficiently washed out when meltwater penetrates through ice than are Cl^?，Mg^<2+> and Ca^<2+>．Washout therefore leads to deficit of sulfate in ice，whereas refreezing of meltwater creates an excess of sulfate relative to sea water with the same content of chloride． application/pdf journal article