Updated dataset on the sinking particle fluxes collected at central subarctic Pacific Station SA and Bering Sea Station AB during 1990-2010

Time-series sinking particle fluxes for 19 years from 1990 to 2010 were obtained using PARLUX-type sediment traps moored at 600 m above the sea floor at Station SA (water depth: 5,406 m) in the central subarctic Pacific and at Station AB (water depth: 3,788 m) in the Aleutian Basin of the Bering Sea. This dataset shows the sinking fluxes of total mass, and relative contents of particulate carbon, nitrogen, and biogenic opal. The collected particles were sieved through 1mm mesh, and the smaller size fraction less than 1mm were treated as sinking particles. Particulate carbon and nitrogen contents were analyzed using a CHN analyzer (the model: Perkin-Elemer 2400). Calcium carbonate content was analyzed with a coulometer (UIC 5012). The organic matter content was estimated with the organic carbon content and the Redfield ratio of 2.857. Biogenic opal content was analyzed based on the alkali-leaching and the molybdate yellow methods. The detail of these methods and the results for the earlier monitoring duration were published by Takahashi et al. (2000, 2002). The sample archive collection and the graph figures showing the particle fluxes with bulk components for the whole period were shown in Takahashi et al. (2012). The dataset of bulk components and their calculation for each sample was re-checked in 2021, and the updated dataset is shown here.

1990年至2010年共计19年的时间序列沉降颗粒通量数据，通过锚泊于北太平洋亚极地中部SA站（水深5406米）以及白令海阿留申海盆AB站（水深3788米）海底上方600米处的PARLUX型沉积物捕集器（PARLUX-type sediment traps）获取。本数据集包含总质量沉降通量，以及颗粒碳、颗粒氮与生物成因蛋白石（biogenic opal）的相对含量。采集的颗粒经1mm孔径筛网筛分后，粒径小于1mm的细粒级组分被视为沉降颗粒。颗粒碳与氮含量采用CHN分析仪（CHN analyzer，型号：Perkin-Elmer 2400）测定；碳酸钙含量通过UIC 5012库仑计分析。有机质含量依据有机碳含量与雷德菲尔德比值（Redfield ratio）2.857估算得到。生物成因蛋白石含量采用碱浸法与钼黄法开展分析。上述分析方法的细节及早期监测时段的研究成果已由Takahashi等人（2000、2002）发表。全时段颗粒通量及体相组分相关图表的样本存档与图件已在Takahashi等人（2012）中展示。本数据集的体相组分及单样本计算结果已于2021年完成复核，本次呈现的为更新后的数据集。