TY - JOUR
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
VL - 55
SP - 777
EP - 783
JO - Journal of Glaciology
JF - Journal of Glaciology
SN - 0022-1430
IS - 193
ER -