th234_trap

 PI:              Jennifer Young, James Murray
 of:              University of Washington
 dataset:         Particulate isotope flux rates 
                     from surface tethered trap samples
 project/cruise:  EqPac/TT007 Survey 1
 ship:            R/V Thomas Thompson


 Thorium-234 Sampling Methodology
 Isotope Sampling Methodology
  
 
 Parameter     Description                                      Units

 event         event number from event log, can be
                 translated into date/time (MMDDHHmm)
                 sediment trap deployed
 date_re       date/time (MMDDHHmm) sediment trap recovered
 sta           station number from event log
 depth_n       nominal depth of trap below water surface        meters
 lat_n         nominal latitude, minus = South                  degrees
 lon_n         nominal longitude, minus = West                  degrees
 Th234_part_f  Thorium-234, particulate flux                    dpm/m2/day
 Pb210_part_f  Lead-210, particulate flux                       dpm/m2/day
 Po210_part_f  Polonium-210, particulate flux                   dpm/m2/day
 pm_f_orig     particulate matter flux as originally received   milligrams/cm2/day
 pm_f          particulate matter flux, units changed by        milligrams/m2/day
                 JGOFS Data Management Office  
 
 nd indicates missing or bad data