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- Title
<sup>10</sup>Be profiles in seawater.
- Authors
Kusakabe, M.; Ku, T. L.; Vogel, J.; Southon, J. R.; Nelson, D. E.; Richards, G.
- Abstract
A knowledge of the marine geochemical cycle of 10Be is basic to the use of this long-lived cosmogenic radioisotope (half life 1.5 Myr) in geochronological and geophysical studies1-3. The first attempts at measuring 10Be in seawater were made only recently using nuclear accelerator spectrometry, and six concentration values from four locations have been reported4-6. This data base must be expanded to include detailed water column profiles, so that the behaviour of 10Be in the ocean can be more fully described. A parallel case in point is the recent measurement7 of a detailed oceanic profile for the stable 9Be. We report here two water column profiles of 10Be: one in the Drake Passage near Antarctica and the other in the San Nicolas Basin about 100 km off the coast of Southern California. The San Nicolas Basin profile clearly demonstrates the regulation of 10Be distribution by particulate cycling. The data confirm the earlier suggestion4 of particle uptake of 10Be in the surface ocean. They also furnish evidence for regeneration of 10Be across the thermocline and near the sea floor, and for mid-water scavenging.
- Publication
Nature, 1982, Vol 299, Issue 5885, p712
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/299712a0