Radium data in the Amazon-Pará River estuary

The Amazon and Pará Rivers make up the largest and 5th largest rivers on earth, respectively, and converge in the Amazon-Pará Estuary. Prior to this dataset however, sparse trace metal data from this region were available. A GEOTRACES process study (GAPr11; cruise M147) was conducted on the RV Meteor during a period of high river discharge to study the flux and cycling of trace metals in this globally important region. Samples for dissolved (<0.2 µm) trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) and Ra-228 were collected in the Amazon and Pará River estuary in April-May 2018. Using these data, we determined the flux and estuarine removal of trace metals from the Amazon and Pará Rivers into the Atlantic Ocean.亚马孙河与帕拉河分别为全球第一、第五大河流，二者在亚马孙-帕拉河口湾交汇。然而在此数据集发布前，该区域的痕量金属观测数据极为稀缺。一项GEOTRACES过程研究（GAPr11；航次M147）于河流高径流期搭乘“流星号”（RV Meteor）科考船开展，旨在探究这一全球关键海域内痕量金属的通量与循环过程。2018年4—5月，研究团队在亚马孙河与帕拉河河口采集了溶解态（<0.2 µm）痕量金属（铝Al、锰Mn、铁Fe、钴Co、镍Ni、铜Cu、锌Zn、镉Cd、铅Pb）及镭-228的样品。基于上述实测数据，本研究定量阐明了亚马孙河与帕拉河向大西洋输入的痕量金属通量及其在河口的移除过程。