| Autor: |
Jean-Pierre Candelone, Kevin J.R. Rosman, Graeme R. Burton, Claude F. Boutron, Sungmin Hong |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Journal de Physique IV (Proceedings). 107:241-244 |
| ISSN: |
1155-4339 |
| DOI: |
10.1051/jp4:20030287 |
| Popis: |
Strontium isotopic composition and concentration have been measured by thermal ionisation mass spectrometry on a suite of samples from the GRIP ice core drilled at Summit, Greenland. The sample ages range from ∼24 to ∼7.3 ky BP extending from the last glacial maximum into the early Holocene. Less than 10 g of sample was used for each analysis. No attempt was made to separate soluble/insoluble species in the samples. Sr concentrations are between ∼950 and ∼1,550 pg.g -1 over the period ∼24 ky to -14 ky BP but fall dramatically to generally less than 150 pg.g -1 between -14 to ∼7.3 ky BP. The 87 Sr/ 86 Sr ratio shows a general rising trend from ∼0.712 to ∼0.715 over the entire period however there are a number of significant deviations from this trend which are most likely due to changing source regions for aerosol dust input to Greenland. Sr isotopic composition shows a strong correlation with δ 18 O suggesting that climate plays a strong role in determining regions for dust release. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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