Dataset: fattyacids
Deployment: TT011

See Platform deployments for cruise specific documentation

   PI:              Stuart Wakeham
   dataset:         Fatty acid fluxes, Indented Rotary Sphere
                    sediment trap samples
   dates:           August 5, 1992 to September 18, 1992
   location:        N: 12  S: -12  W: -140  E: -140
   project/cruise:  EqPac/TT011 - Fall Survey
   ship:            Thomas Thompson
 
   Sampling Methodology: Traps deployed at 100 meters for durations of 1.5 to 2.5     
   days.  For specifics on trap deployment/recovery positions and times see event log, PI 
   Hedges. 

   Methodology:  Sediment trap material was filtered onto 90 mm glass fiber
   filters (A/E) and frozen.  Filters with trap material and sediments were
   Soxhlet extracted with methylene chloride-methanol (2:1) and the extracts
   partitioned into the organic phase with 5% NaCl.  The "lipid extracts"
   were saponified with 0.5N KOH/methanol, with "neutral lipids" extracted
   out of basic solution and "acids" extracted out of acidic solution.
   Neutral lipids were silylated with BSTFA and fatty acids were methylated
   with diazomethane.  Anaylsis was by gas chromatography and gas
   chromatography-mass spectrometry.

 
   Notes:
   Note due to the nature of this data set the standard suite of data
   manipulative tools (plot/other options) on the JGOFS Data System 
   do not apply.
  
   fatty_acid names have been prefixed with (fa_) and this prefix must be 
   ignored when deciphering the true fatty acid name.  Names are defined as 
   number carbon atoms:number of double bonds.  Prefixes i=iso, a=anteiso.
   
   The field labels n12 thru s12 are nominal latitudes for trap deployments
   along 140 west.
  
   Traps deployed at 100 meters for durations of 1.5 to 2.5 days.  For specifics
   on trap deployment/recovery positions and times see event log, PI Hedges. 
  
   fatty acid fluxes = reported as ug/m^2/day
   nd = no/bad data