calcite_prod

 
  PI:              William Balch
  dataset:         Suspended calcite, calcification and photosynthesis
  project/cruise:  Arabian Sea/TTN-049 - Process Cruise 4   
  ship:            Thomas Thompson

Methods, "Calcification and Photosynthesis" (from EqPac protocols)

 PI Note:   The photosynthesis and calcification technique was modified 
            according to:
                Paasche, E. and S. Brubak.  1994.  Enhanced calcification
                in the coccolithophorid Emiliania huxleyi (Haptophyceae)
                under phosphorus limitation.  Phycologia  33: 324-330.

 DMO Note:  Data are served with ascending event numbers.  
            At stations 7, 13, 17, 22, 27, 29 and 30, the depth profile was 
            taken in two casts, with the deep cast done first.  At 
            these stations, the depth will be out of order.

 Nuclepore 0.4 micron membrane filters were used for all filtrations.
 
 Parameter      Description                                  Units

 event         event number from event log
 sta_std       Arabian Sea standard station identifier
 sta           station number from event log
 cast          CTD rosette cast number from event log
 bot           CTD rosette bottle number
 depth         sample depth                                  meters
 Ca_p          Calcium concentration for any particles       micrograms/liter
                 greater than 0.4 microns; effectively
                 the suspended calcite concentration.       
 C_photosyn    Photosynthesis: rate of C-14 fixation         micrograms C/liter/day
                 (organic fraction) by micro-diffusion method.
 C_calcif      Calcification: rate of C-14 fixation          micrograms C/liter/day
                 (calcite fraction) by micro-diffusion method.