silica

 PI:              David Nelson and Mark Brzezinski
 of:              Oregon State (Nelson) and UC Santa Barbara (Brzezinski)
 dataset:         Biogenic silica production rates and dissolution rates in the Antartic Polar Frontal Zone
 project/cruise:  AESOPS/RR_KIWI09; APFZ Process 2 cruise 
 ship:            Roger Revelle

 Production Rate Sampling Methodology
 Dissolution Rate Sampling Methodology
 PI Notes
 PI QC note for bottle #7

 Parameter    Description                                        Units

 event        event number from event log
 sta          station number from event log
 cast         rosette cast number from event log
 cast_type    CTD = CTD rosette
              TM = Trace Metal rosette
 bot          rosette bottle number
 depth_n      nominal sample depth                               meters
 Si_acid      dissolved silicic acid concentration               micromolar
 Si_bio       biogenic particulate silica concentration          micromoles Si/liter
 irrad_incub  irradiance level set for incubation experiments    percent
 Si_rho       rate of biogenic silica production                 micromoles Si/liter/day
 Si_Vb        specific rate of biogenic silica production        per day
 Si_dis_rate  rate of biogenic silica dissolution                micromoles Si/liter/day
 nd           no data