| Автор | Finkel, R. C. |
| Автор | Nishiizumi, K. |
| Автор | Elmore, D. |
| Автор | Ferraro, R. D. |
| Автор | Gove, H. E. |
| Дата выпуска | 1980 |
| dc.description | Concentrations of the cosmogenic radioisotope <sup>36</sup>Cl (t<sub>1/2</sub>=3.0×10<sup>5</sup> yr) in Antarctic ice and in rain and an upper limit to the seawater value have been determined using van de Graaff accelerator high energy mass spectrometry. Chlorine‐36 concentrations in Antarctic ice lie in the range (2.5‐8.7)×10<sup>6</sup> atoms <sup>36</sup>Cl/kg. Recent firn from Siple Station and ice samples collected from the Allan Hills ice field at locations where meteorites have been brought to the surface by glacial flow and ablation have <sup>36</sup>Cl contents which vary by more than a factor of three. This variation can be attributed either to the effects of atmospheric mixing and scavenging or to radioactive decay in very old ice. The <sup>36</sup>Cl concentration found in a sample of recent rainwater is much lower than has been reported in samples collected in the early 1960’s, suggesting that there has been a large decrease in the concentration of atmospheric <sup>36</sup>Cl derived from nuclear weapons tests over this time period. If measurement sensitivities can be increased somewhat, calculations indicate that the bomb spike of <sup>36</sup>Cl may potentially be a useful oceanographic mixing tracer. |
| Формат | application.pdf |
| Копирайт | Copyright 1980 by the American Geophysical Union. |
| Тема | CRYOSPHERE |
| Тема | Snow |
| Тема | Glaciology |
| Тема | GEOCHEMISTRY |
| Тема | Geochemistry: Geochronology (age determinations by radioactive processes) |
| Тема | HYDROLOGY |
| Тема | Glaciology |
| Тема | Snow and ice |
| Тема | OCEANOGRAPHY: GENERAL |
| Тема | Oceanography: Circulation |
| Название | <sup>36</sup>Cl in polar ice, rainwater and seawater |
| Тип | article |
| DOI | 10.1029/GL007i011p00983 |
| Electronic ISSN | 1944-8007 |
| Print ISSN | 0094-8276 |
| Журнал | Geophysical Research Letters |
| Том | 7 |
| Первая страница | 983 |
| Последняя страница | 986 |
| Выпуск | 11 |
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