sed_comp

 PI:              Fred Sayles and William Martin
 of:              Woods Hole Oceanographic Institution
 data set:        Sediment composition
 project/cruise:  AESOPS NBP98-2, Benthic Processes cruise
 ship:            Nathaniel B. Palmer

 Sampling Methodology  


 Parameter       Description                                     Units

 event           event number from event log
 sta             station number from event log
 site            sediment trap mooring number
 deploy_id       type of sampling device:
                   MC=MultiCorer
                   WHIMP=Woods Hole Interstitial Marine Probe
 depth_w         ocean depth                                     meters
 depth_core      average depth (from core top) of sediment       centimeters
                   sampling interval (negative numbers refer
                   to water or fluff layer above the
                   sediment-water interface
 depth_core_sd   standard deviation of sediment interval         centimeters
 porosity        volume of pore water per volume of wet
                   sediment                                      
 C_org           average weight percent of organic carbon        percent
 C_org_sd        standard deviation of replicates                percent
 Si_opal         weight percent opal                             percent
 CaCO3           weight percent of calcium carbonate             percent
 biog_tot        Si_opal + CaCO3 + 2.8*C_org                     percent
 detrital        100 minus biog_tot                              percent
 Pb210xs         excess Pb210 activity                           dpm/gram
 Pb210xs_sd      uncertainty in Pb210xs                          dpm/gram
 Th234xs         excess Th234 activity                           dpm/gram
 Th234xs_sd      uncertainty in Th234xs                          dpm/gram