Total 234Th and 238U data in East Antarctic polynyas

Thorium-234 samples were collected to determine the particulate organic carbon (POC) export fluxes in two East Antarctica polynyas, Dalton and Mertz. The samples were collected along the water column using the CTD deployed at several stations. The seawater Th-234 data was used in combination with POC:234Th ratios obtained from particulate samples collected using in situ pumps in order to derive the POC fluxes.This record describes Th-234 and U-238_data: sample ID, depth, CTD file, station ID, latitude and longitude, Th-234 concentration and its uncertainty, U-238 concentration and its uncertainty.See linked record for associated POC data from Aurora Australis Voyage 2 2016/17.

为测定东南极两处冰间湖——道尔顿（Dalton）与默茨（Mertz）的颗粒有机碳（particulate organic carbon, POC）输出通量，研究人员采集了钍-234（Thorium-234）样品。本次采样依托布设于多个站位的温盐深仪（CTD）沿海水柱完成。研究人员结合原位泵采集的颗粒样品得到的POC与234Th比值数据，以及海水钍-234实测数据，推导得到POC输出通量。本数据集记录了钍-234与铀-238（U-238）的相关参数，包括样品编号、采样深度、CTD数据文件、站位编号、经纬度、钍-234浓度及其不确定度、铀-238浓度及其不确定度。有关2016/17年度Aurora Australis第2航次的关联POC数据，请参阅关联数据集记录。