Lead-210 in the North Pacific and the transport of terrestrial material through the atmosphere |
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Authors: | Yoshiyuki Nozaki Shizuo Tsunogai |
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Institution: | Department of Chemistry, Faculty of Fisheries, Hokkaido University, Hakodate, Japan |
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Abstract: | 210Pb in the surface water of the North Pacific was extensively determined. The results showed that the highest concentrations of210Pb of 19 ± 3dpm/100kg were found in the northern mid-latitudes around 30°N, but longitudinal variation across the North Pacific was not observed. The mean residence time of210Pb in the surface water up to 100 m in depth is calculated to be 230 days. In the mid-latitudes of the northern hemisphere,210Pb may be transported by the prevailing westerly wind of a higher speed than 15 m/sec, likely the jet stream. |
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