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.

本数据集涵盖两次亚马逊河羽流（Amazon River plume）科考航次中采集的各类生物标志物的组成与浓度信息。2010年（丰水期），研究团队在R/V Knorr号科考船于2010年5月23日至6月21日执行的航次中采集了颗粒态有机碳（Particulate Organic Carbon, POC）样本；2011年（枯水期），则在R/V Melville号科考船2011年9月5日至10月6日的航次中完成了同类样本的采集。表层海洋垂直沉降的颗粒态有机碳样本，采用12管聚碳酸酯自由漂浮式表面系留粒子捕获器采集，该装置可采集约1至3天内累积的沉降物质。随后，通过孔径0.7微米的GF/F滤膜收集颗粒物质。
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，研究结果与“河羽流可促进初级生产”以及“深层水体和垂直输出的颗粒态有机碳中，浮游动物与细菌对其组成的贡献显著提升”的结论相符。沉积物捕获器样本的采集工作由南加州大学的威廉·伯勒尔森博士（William Berelson）完成，颗粒态有机碳样本的采集则由佐治亚大学的帕特里夏·梅德罗斯博士（Patricia Medeiros）负责。