북서태평양 아열대 해역에서 침강입자 플럭스의 시·공간 변동

Abstract

Time-series sediment traps were deployed at 1,000 m water depth of the northwestern subtropical Pacific from July 2009 to June 2010, with the aim of understanding temporal and spatial variations of sinking-particle fluxes. The opening and closing of the traps was synchronized at 18-day periods for 20 events. Total mass fluxes showed distinct seasonal variations with high values for the summer-fall seasons and relatively low values for winter-spring. This seasonal variation at two stations was characterized by a distinct difference in <TEX>$CaCO_3$</TEX> fluxes between the two seasons. The enhanced <TEX>$CaCO_3$</TEX> flux in the summer - fall seasons might be attributed to an increased planktonic foraminiferal flux. Total mass flux at FM10 station was nearly 50% higher than that at FM1 station. The difference in <TEX>$CaCO_3$</TEX> fluxes between two stations contributed nearly 70% of the difference of total mass fluxes. The <TEX>$CaCO_3$</TEX> flux was a major component controlling temporal and spatial variation of sinking - particle fluxes in the western subtropical Pacific Ocean.