Direct observation of salts as micro-inclusions in the Greenland GRIP ice core

We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO 4 ·2H 2 O) and calcium carbonate (CaCO 3 ), are present as solid, micron-sized inclusions within the Greenland GRIP ice core. The compounds are detected by two independent methods: micr...

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Bibliographic Details
Published in:Journal of Glaciology
Main Authors: Dahl-Jensen, Dorthe, Sakurai, Toshimitsu, Iizuka, Yoshinori, Horikawa, Shinichiro, Johnsen, Sigfus Johann, Steffensen, Jørgen Peder, Hondoh, Takeo
Format: Article in Journal/Newspaper
Language:English
Published: 2009
Subjects:
Greenland
GRIP
ice core
Journal of Glaciology
Online Access:https://curis.ku.dk/portal/da/publications/direct-observation-of-salts-as-microinclusions-in-the-greenland-grip-ice-core(46f37c50-0f40-11df-825d-000ea68e967b).html
https://doi.org/10.3189/002214309790152483
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Summary:We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO 4 ·2H 2 O) and calcium carbonate (CaCO 3 ), are present as solid, micron-sized inclusions within the Greenland GRIP ice core. The compounds are detected by two independent methods: micro-Raman spectroscopy of a solid ice sample, and energy-dispersive X-ray spectroscopy of individual inclusions remaining after sublimation. CaSO 4 ·2H 2 O is found in abundance throughout the Holocene and the last glacial period, while CaCO 3 exists mainly in the glacial period ice. We also present size and spatial distributions of the micro-inclusions. These results suggest that water-soluble aerosols in the GRIP ice core are dependable proxies for past atmospheric conditions. Udgivelsesdato: December

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