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

Dorthe Dahl-Jensen; Toshimitsu Sakurai; Yoshinori Iizuka; Shinichiro Horikawa; Sigfus Johann Johnsen; Dorthe Dahl-Jensen; Jørgen Peder Steffensen; Takeo Hondoh

doi:10.3189/002214309790152483

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

Dorthe Dahl-Jensen, Toshimitsu Sakurai, Yoshinori Iizuka, Shinichiro Horikawa, Sigfus Johann Johnsen, Dorthe Dahl-Jensen, Jørgen Peder Steffensen, Takeo Hondoh

Is-, Klima- og Geofysik

12 Citationer (Scopus)

Abstract

We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO₄·2H₂O) and calcium carbonate (CaCO₃), 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. CaSO₄·2H₂O is found in abundance throughout the Holocene and the last glacial period, while CaCO₃ 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

Originalsprog	Engelsk
Tidsskrift	Journal of Glaciology
Vol/bind	55
Udgave nummer	193
Sider (fra-til)	777-783
Antal sider	7
ISSN	0022-1430
DOI	https://doi.org/10.3189/002214309790152483
Status	Udgivet - 2009

Adgang til dokumentet

10.3189/002214309790152483

Citationsformater

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title = "Direct observation of salts as micro-inclusions in the Greenland GRIP ice core",

abstract = "We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO4·2H2O) and calcium carbonate (CaCO3), 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. CaSO4·2H2O is found in abundance throughout the Holocene and the last glacial period, while CaCO3 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",

author = "Dorthe Dahl-Jensen and Toshimitsu Sakurai and Yoshinori Iizuka and Shinichiro Horikawa and Johnsen, {Sigfus Johann} and Dorthe Dahl-Jensen and Steffensen, {J{\o}rgen Peder} and Takeo Hondoh",

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T1 - Direct observation of salts as micro-inclusions in the Greenland GRIP ice core

AU - Dahl-Jensen, Dorthe

AU - Sakurai, Toshimitsu

AU - Iizuka, Yoshinori

AU - Horikawa, Shinichiro

AU - Johnsen, Sigfus Johann

AU - Dahl-Jensen, Dorthe

AU - Steffensen, Jørgen Peder

AU - Hondoh, Takeo

N1 - Paper id:: 10.3189/002214309790152483

PY - 2009

Y1 - 2009

N2 - We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO4·2H2O) and calcium carbonate (CaCO3), 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. CaSO4·2H2O is found in abundance throughout the Holocene and the last glacial period, while CaCO3 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

AB - We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO4·2H2O) and calcium carbonate (CaCO3), 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. CaSO4·2H2O is found in abundance throughout the Holocene and the last glacial period, while CaCO3 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

U2 - 10.3189/002214309790152483

DO - 10.3189/002214309790152483

M3 - Journal article

SN - 0022-1430

VL - 55

SP - 777

EP - 783

JO - Journal of Glaciology

JF - Journal of Glaciology

IS - 193

ER -