Fractionation of 210Po and 210Pb in coastal waters of the NW Mediterranean continental margin

Particle-reactive radionuclides (<sup>234</sup>Th, <sup>210</sup>Pb, <sup>210</sup>) as tracers for the estimation of export production in the South China Sea

“…The PIC/ 210 Pb ratios are 433 ± 252, 279 ± 51, and 108 ± 96 µmol dpm −1 at 30, 100, and 160 m, respectively. The ratios at the lower euphotic depth were very similar to 135-518 µmol dpm −1 at 150 m in the Northwest Mediterranean (Tateda et al, 2003). The PN/ 210 Pb ratios obtained from this study are comparable with the ratios in sinking particles from the euphotic layer in the Mid Atlantic Bight (21∼279 mmol dpm-1, Biscaye et al, 1988) and the Northwest Mediterranean (4-126 mmol dpm-1, Tateda et al, 2003).…”

“…These values are comparable to POC/ 210 Pb ratios of 80-268 µmol dpm −1 in sinking particles collected by sediment traps at 150 m off the east coast of the United States (Biscaye et al, 1988) and 50-489 µmol dpm −1 in the northwestern Mediterranean (Tateda et al, 2003). The POC/ 210 Po ratios in the sinking particles are highly variable, ranging from 120 to 1200 µmol dpm −1 , similar to ratios in the sinking particles collected in the coastal Mediterranean Sea (Tateda et al, 2003;Stewart et al, 2007). However, compared to open ocean values and references therein), our data fall on the high end of these POC/ 210 Po ratios.…”

“…The average PIC/ 210 Po and PN/ 210 Po ratios range from 91 to 433 µmol dpm −1 and 14 to 50 µmol dpm −1 , respectively. Compared to the trap data and PIC, PN, and 210 Po data of Tateda et al (2003), our results fall in the C.-L. Wei et al: Export production estimated by particle-reactive radionuclides in the South China Sea 3803 same range as the PIC/ 210 Po and PN/ 210 Po ratios from the coastal Mediterranean, i.e. 94-1115 µmol dpm −1 and 7-148 µmol dpm −1 , respectively.…”

The 210Po and 210Pb levels in surface sediment samples in the Izmir Bay (Aegean Sea-Turkey)

“…The highest atmospheric 210 Pb deposition was also calculated in winter time in the same region (unpublished data). Tateda et al (2003) indicate that the atmospheric 210 Po and 210 Pb inputs to coastal waters, particularly near the shoreline, are seasonally high in winter for both nuclides in the NW Mediterranean continental margin because of Rn-rich air mass Ugur et al (2006b) for sediment collected from the Aegean Sea Turkish Coast.…”

Bio-accumulation of210Pb and210Po within the Trophic Level of Phytoplankton-Zooplankton-Anchovy-Mackerel in the Coastal Water of the Jeju Island, Korea

“…(Nozaki et al 1991;Stewart et al 2010;Tateda et al 2003). Chub mackerel (Scomber japonicus) Muscle 0.8 ± 0.03 0.21 ± 0.05 3.7 ± 0.9 Skin 2.9 ± 0.6 0.73 ± 0.13 3.9 ± 1.1 Internal organ 30 ± 7 1 .…”