Downward particle fluxes at the oligotrophic and mesotrophic site of the EUMELI program

A two year record of downward particle flux was obtained with moored sediment traps at several depths of the water column in two regions characterized by different primary production levels (mesotrophic and oligotrophic) of the eastern subtropical North Atlantic Ocean in the framework of the EUMELI program. Settling particles were collected with multisample conical sediment-traps moored at 1000 and 2500 depths in the water column. Time-series samples were obtained between February 1991 and November 1992. During this time, sampling intervals varied from 8 to 10 d and were synchronized at all depths and also between the oligotrophic and mesotrophic moorings. Sediment-trap sampling procedures were consistent with JGOF and described elsewhere. The data shown here are mass, particulate organic carbon (POC), particulate inorganic carbon (PIC), coccolithophore, opal, and lithogenic downward fluxes obtained during the entire sediment-trap deployments at both sites.

本数据集依托EUMELI项目框架，在北大西洋东部亚热带海域的两个不同初级生产力水平区域（中营养型与寡营养型），通过锚泊式沉积物捕集器在水柱多个深度处获取了为期两年的向下颗粒通量记录。沉降颗粒由安装在水柱1000米与2500米深度的多采样锥形沉积物捕集器收集。时间序列采样时段为1991年2月至1992年11月，期间采样间隔为8至10天，所有采样深度以及寡营养型与中营养型锚泊站位之间的采样均保持同步。沉积物捕集器的采样流程符合JGOF标准，并已在其他文献中详述。本数据集包含两个站位在整个沉积物捕集器布放周期内获取的质量通量、颗粒有机碳（particulate organic carbon, POC）、颗粒无机碳（particulate inorganic carbon, PIC）、颗石藻、蛋白石以及岩源性向下颗粒通量数据。