Both the sample collection and analytical methods were done following the GEOTRACES Cookbook (Cutter et al., 2017).
\nDissolved samples were collected according to GEOTRACES protocol for Po-210 and Pb-210 using ship CTD rosette. Particulate Po-210 and Pb-210 was collected using large volume McLane pumps. Samples were collected on two different filter sizes, small particles (1- 51 \u00b5m) and large particles (>51 \u00b5m) filtering 500-800 L seawater. This dataset contains data on the large particles.
\nAnalytical procedures were performed at Louisiana State University, following the protocol described in GEOTRACES Cookbook, Flynn (1968) and Fleer and Bacon (1984). The counting for Po-210 was done using Canberra Alpha Analyst high-resolution silicon-surface barrier (PIPS). The counting error was less than 10% for all the samples including the tracer.
This dataset includes dissolved and large particulate Polonium 210 and Lead 210\u00a0measurements from the Western Arctic Ocean, which were sampled as part of the 2015 US GEOTRACES Cruise (GN01; HLY1502). These data have been published in Bam et al., 2020.
Data Processing: Followed Baskaran et al (2013) and Riguad et al. (2013) for the data calculation.\u00a0
\nData were flagged using the SeaDataNet quality flag scheme. For more information on SeaDataNet flags, see:\u00a0https://www.geotraces.org/geotraces-quality-flag-policy/\u00a0and\u00a0https://www.seadatanet.org/Standards/Data-Quality-Control
\nSeaDataNet quality flag definitions:
\n0 = No quality control;
\n1 = Good value;
\n2 = Probably good value;
\n3 = Probably bad value;
\n4 = Bad value;
\n5 = Changed value;
\n6 = Value below detection;
\n7 = Value in excess;
\n8 = Interpolated value;
\n9 = Missing value;
\nA = Value phenomenon uncertain.