Composition and concentration of individual biomarkers collected by particle interceptor traps in the Amazon River plume during R/V Knorr cruise KN197-08 in 2010 and R/V Melville cruise MV1110 in 2011

These data include composition and concentration of individual biomarkers collected during two cruises to the Amazon River plume. Particulate organic carbon (POC) was collected in 2010 (high discharge) on a cruise aboard the R/V Knorr between 2010-05-23 and 2010-06-21, and in 2011 (low discharge) on a cruise aboard the R/V Melville between 2011-09-05 and 2011-10-06. POC sinking vertically from the surface ocean was collected using 12-polycarbonated tube free-floating surface-tethered particle interceptor traps, capturing ~1 to 3-days of accumulated sinking material. Then, the particulate material was collected using 0.7 micrometer GF/F filters. These data help to clarify the Amazon River plume's impact on the biological pump of the tropical Atlantic Ocean, consistent with a river plume fueling primary production, and with increased zooplankton and bacteria contributions to POC composition at depth and in the POC that is vertically exported. Sediment trap collections were performed by Dr. William Berelson at the University of Southern California and POC samples were collected by Dr. Patricia Medeiros at the University of Georgia.本数据集包含两次亚马逊河羽流科考航次中采集的单种生物标志物的组成与浓度数据。 颗粒有机碳（Particulate Organic Carbon, POC）样本分别于2010年（高径流期）和2011年（低径流期）采集：2010年航次搭载于“克诺尔号”（R/V Knorr）科考船，作业时段为2010年5月23日至2010年6月21日；2011年航次搭载于“梅尔维尔号”（R/V Melville）科考船，作业时段为2011年9月5日至2011年10月6日。 本次采集的表层海洋垂直沉降颗粒有机碳，采用12管聚碳酸酯材质的自由漂浮式表面系留颗粒拦截捕集器完成，该设备可捕获约1至3天内累积的沉降颗粒物；随后使用0.7微米GF/F滤膜对颗粒物进行收集。 本数据集有助于阐明亚马逊河羽流对热带大西洋生物泵的影响，相关结论与“河羽流可驱动初级生产”以及“深层水体与垂直输出的POC中，浮游动物与细菌对POC组成的贡献显著提升”的观测结果一致。沉积物捕集器的布设与样品采集工作由南加州大学的威廉·伯勒尔森（William Berelson）博士完成，颗粒有机碳样本的采集工作由佐治亚大学的帕特里夏·梅德罗斯（Patricia Medeiros）博士完成。