Chlorine 36 fallout in the Summit Greenland Ice Core Project ice core

被引：30

作者：

Baumgartner, S

Beer, J

Suter, M

DittrichHannen, B

Synal, HA

Kubik, PW

Hammer, C

Johnsen, S

机构：

[1] SWISS FED INST ENVIRONM SCI & TECHNOL,CH-8600 DUBENDORF,SWITZERLAND

[2] ETH ZURICH,INST PARTICLE PHYS,CH-8093 ZURICH,SWITZERLAND

[3] UNIV COPENHAGEN,DEPT GEOPHYS,DK-2100 COPENHAGEN,DENMARK

[4] PAUL SCHERRER INST,VILLIGEN,SWITZERLAND

[5] UNIV ICELAND,INST SCI,IS-107 REYKJAVIK,ICELAND

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS | 1997年 / 102卷 / C12期

关键词：

D O I：

10.1029/97JC00166

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

The natural cosmogenic radioisotope Cl-36 has been measured in the Greenland Ice Core Project ice core from Summit, Greenland. Generally, a good correlation between Cl-36 and delta(18)O was found, even in glacial periods with strong delta(18)O oscillations. The Cl-36 flux is calculated assuming an exponential relationship between accumulation rate and delta(18)O. A prominent excursion is detected between 35 and 40 kyr B.P., which coincides with a similar Be-10 peak measured in the same samples. This sheds light on possible causes of this excursion. In the lowest part of the ice core the flux decreases smoothly. This can be interpreted as radioactive decay of Cl-36 (T-1/2 = 300 kyr).

引用

页码：26659 / 26662

页数：4

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