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

被引：17
|
作者：
Sakurai, Toshimitsu [1 ]
Iizuka, Yoshinori [1 ]
Horikawa, Shinichiro [1 ]
Johnsen, Sigfus [2 ]
Dahl-Jensen, Dorthe [2 ]
Steffensen, Jorgen Peder [2 ]
Hondoh, Takeo [1 ]
机构：
[1] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan
[2] Univ Copenhagen, Niels Bohr Inst Astron Phys & Geophys, DK-2100 Copenhagen, Denmark
来源：
JOURNAL OF GLACIOLOGY | 2009年 / 55卷 / 193期
基金：
日本学术振兴会;
关键词：
LAST CLIMATIC CYCLE; PROJECT; MICROPARTICLES; INSTABILITY; RECORD; DUST; SNOW; ACID; DOME;
D O I：
10.3189/002214309790152483
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
We provide the first direct evidence that a number of water-soluble compounds, in particular calcium sulfate (CaSO4 center dot 2H(2)O) 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 center dot 2H(2)O 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.
引用
收藏
页码：777 / 783
页数：7
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