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_KIWI08; APFZ Survey 2 cruise 
 ship:            Roger Revelle

 Production Rate Sampling Methodology
 Dissolution Rate Sampling Methodology
 PI Notes

 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