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| Titel |
Seasonal distributions and fluxes of 210Pb and 210Po in the northern South China Sea |
| VerfasserIn |
C.-L. Wei, M.-C. Yi, S.-Y. Lin, L.-S. Wen, W.-H. Lee |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 23 ; Nr. 11, no. 23 (2014-12-08), S.6813-6826 |
| Datensatznummer |
250117718
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| Publikation (Nr.) |
 copernicus.org/bg-11-6813-2014.pdf |
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| Zusammenfassung |
| Vertical distributions of dissolved and particulate 210Pb and 210Po
in the water column at the SouthEast Asian Time-series Study (SEATS,
18°00´ N and 116°00´ E) station in the northern South
China Sea were determined from four cruises between January 2007 and June
2008. A large deficiency of 210Pb,
379 ± 43 × 103 dpm m−2, from the secular
equilibrium was found within the 3500 m water column. On the other hand, a
smaller deficiency of 210Po,
100 ± 21 × 103 dpm m−2, relative to 210Pb was
found in the water column. Time-series data showed insignificant temporal
variability of the 210Pb and 210Po profiles. To balance these
deficiencies, the removal fluxes for 210Pb and 210Po via particle
settling ranging from 45 to 51 dpm m−2d−1 and from 481 to
567 dpm m−2d−1, respectively, are expected at 3500 m. The
210Pb removal flux is comparable with, whereas the 210Po removal
flux is much higher than, the flux directly measured by moored sediment
traps. The discrepancy between the modeled 210Po flux and the measured
flux suggests that sporadic events that enhance 210Po removal via
sinking ballast may occur in the water column at the site. |
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