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

[魏慶琳]

親顆粒的放射核種是研究化學元素在海洋中循環過程的有效工具。在所有天然放射核種中，我們利用²³⁴Th, ²¹⁰Pb, 和²¹⁰Po來探討南海上層水體的碳輸出通量和台灣沿岸淺水環境微量元素的移除通量。在南海的表層和深層中，經由漂浮式及錨碇式沈降顆粒收集器的施放，我們也直接地量測南海中各放射核種和微量元素的垂直通量。[Ching-Ling Wei]

Particle-reactive radionuclides are very powerful tools in studying the cycling processes of chemical elements in the ocean. Among the naturally occurring radionuclides, ²³⁴Th, ²¹⁰Pb, and ²¹⁰Po have been used to investigate the carbon export via particle settling through the upper water column of the South China Sea and the particle removal fluxes of trace elements in the nearshore waters along the coastline of Taiwan. Both floating traps and moored sediment traps have also been deployed to directly measure the sinking fluxes of the radionuclides and trace elements in the surface and deep layers of the South China Sea.