Data from Potential source areas for atmospheric lead reaching Ny-Ålesund from 2010 to 2018

date reports the sampling data in YYYY-MM-DD format and volume the sampling volume in m3.<br> pb_sign is = for Pb concentrarion data above limit of quantification (LoQ) and &lt; for data below LoQ.<br> pb_val is numeric and it is the measured Pb concentration or LoQ in pg/m3.<br> pb is text and it is the measured Pb concentration or &lt;LoQ in pg/m3.<br> al_ef is the enrichment factor (EF) EF(Pb/Al)c in comparison to the upper continental crust (UCC, Wedepohl 1995).<br> pb20x20y is the value measured for 20xPb / 20yPb isotope ratio.<br> u20x20y is the 95-confidence level uncertainty for the measured 20xPb / 20yPb isotope ratio value.<br> Missing values are reported as NA.<br> Wedepohl 1995: Wedepohl, K.H., 1995. The composition of the continental crust. Geochim. Cosmochim. Acta 58A, 959–960. https://doi.org/10.1180/minmag.1994.58A.2.234