th234_pump

 PI:              Ken Buesseler, Michael Bacon and Kirk Cochran
 of:              Woods Hole Oceanographic Institution (Buesseler,Bacon)
			  and SUNY/Stony Brook (Cochran) 
 dataset:         Th-234 in particulate and dissolved phases; POC/PON
 project/cruise:  AESOPS/NBP-97-1 - Ross Sea Process 2 Cruise
 ship:            Nathaniel B. Palmer

 Methodology Reference 
          K. Buesseler, L. Ball, J. Andrews, C. Benitez-Nelson,
             R. Belastock, F. Chai and Y. Chao. Upper ocean export of
             particulate organic carbon in the Arabian Sea derived from
             thorium-234. Deep-Sea Research II, Vol. 45, No. 10-11, p.2461.


 Parameter      Description                             Units

 event            event number from event log
 sta              station number from event log
 lat              latitude in decimal degrees
 lon              longitude in decimal degrees
 sample           integrated=in-situ pump (Slurper)
                     integrated over depth range
                   discrete=in-situ pump (Slurper)
                     at one discrete depth
 depth_n          nominal depth                                meters
 Th234_p_gt70     particulate Th234 activity in the size       dpm/liter
                     fraction greater than 70 microns
 err_p_gt70       error of particulate Th234 activity
                     greater than 70 microns; 1 sigma
 Th234_p_1to70    particulate Th234 activity in the size       dpm/liter
                     fraction between 1 and 70 microns
 err_p_1to70      error of particulate Th234 activity
                     between 1 and 70 microns; 1 sigma
 Th234_d          dissolved Th234 activity                     dpm/liter
 Th234_d_err      error of dissolved Th234 activity; 1 sigma   dpm/liter
 Th234_t          total Th234 activity                         dpm/liter
 Th234_t_err      error of total Th234 activity; 1 sigma       dpm/liter
 flag_q           Th234 data quality code
                     a = good
                     b = Mn cartridge efficiency poor
                     c = other error
 POC_gt70         particulate organic carbon in the size       umol/liter
                     fraction greater than 70 microns
 PON_gt70         particulate organic nitrogen in the size     umol/liter
                     fraction greater than 70 microns
 POC_1to70        particulate organic carbon in the size       umol/liter
                     fraction between 1 and 70 microns
 PON_1to70        particulate organic nitrogen in the size     umol/liter
                     fraction between 1 and 70 microns

 nd indicates no data or bad data