Particulate Thorium and Protactinium Isotopes 
   U.S. GEOTRACES Arctic Cruise (HLY1502, GN01) 
  PIs: Robert F. Anderson (LDEO) & R. Lawrence Edwards (UMTC) 
  Co-PIs: Martin Q. Fleisher (LDEO) & Hai Cheng (UMTC) 
  Contact/Analyst: Sebastian M. Vivancos (LDEO) 
  Version history: 
   2021-02-23 (v2) - version 2 published; includes changes to some data values; file submitted to BCO-DMO on 2021-01-28. 
   2020-12-30 (v1) - version 1 published; file submitted to BCO-DMO on 2020-12-21.