Dissolved Pb concentrations 
   U.S. GEOTRACES Arctic 
  PI: Edward A. Boyle (MIT) 
  Co-PI: Cheryl M. Zurbrick (MIT) 
  Version history: 
   2020-11-16. v1. (current) - replaced with GEOTRACES DOoR-formatted version. 
   2019-04-03. v0. - original version processed; restricted access.