POC fluxes estimated from the radioisotopes in the mesopeIagic ocean.

本文用天然放射性同位素~（13）Po估算了西北太平洋副北极和副热带环流区中层颗粒有机碳（POC）的沉降通量<210>。副北极环流POC通量的年平均和季节变化均大于副热带环流。认为亚北极环流的生物碳沉降能力大于副热带环流。

The sinking fluxes of particulate organic carbon (POC) in the mesopelagic layer were estimated from the natural radioisotope, <210>^Po in the several seasons in the subarctic and subtropical gyres of the western North Pacific Ocean. The annual mean and seasonal variation of POC fluxes in the subarctic gyre were larger than those in the subtropical gyre. It was considered that the biological sinking capacity of carbon in the subarctic gyre was larger than that in the subtropical gyre.