GEOTRACES Arctic  ARC01  HLY1502 
   Trace Metal CTD bottle data (GT-C) 
   PIs: W. Landing, et al 
   Version history: 
     2019-07-29: current version (v4) [removed all "placeholder" columns containing no data (-999 only); see metadata]. 
     2017-05-01: v3 [revised data for event 6709 and added event 6369]. 
     2016-06-09: v2 [replaces previous version]. 
     2016-05-17: v1 served. 
  
   BOTTLE: 20160609ODU 
   replaces BOTTLE: 20151010ODU 
   S-M_DEPTH IS SAUNDERS-MANTYLA DEPTH (INTEGRATED; USES DYNAMIC HEIGHT) 
   F-M_DEPTH IS FOFONOFF-MILLARD DEPTH (NON-INTEGRATED; ALSO USED BY SBE) 
   CTDDEPTH REPORTED HERE IS NON-INTEGRATED FOFONOFF-MILLARD DEPTH 
   QUALITY CODE 'A' WAS USED FOR DATA VALUES SUBMITTED AS 'ABOVE DETECTION LIMITS' 
   QUALITY CODE 'B' WAS USED FOR DATA VALUES SUBMITTED AS 'BELOW DETECTION LIMITS'