Dataset: Particulate matter concentration
Deployment: AII-119-4

PI:              Wilford Gardner
of:              Texas A & M University
dataset:         Particulate matter concentration from filtered Niskin Bottles
dates:           April 20, 1989 to May 10, 1989
location:        N: 59.7418  S: 41.104  W: -23.022  E: -19.0205
project/cruise:  North Atlantic Bloom Experiment/Atlantis II 119, leg 4
ship:            R/V Atlantis II
 
Methodology
See:  Gardner, W.D., I.D. Walsh, and M.J. Richardson, 1993.  Biophysical forcing of
particle production and distribution during a spring bloom in the North Atlantic.
Deep-Sea Research II, Vol. 40, No. 1/2, pp. 171-195
 
PI-Notes:
Only stations at 47N (stations 11-23) were used in PMC vs Beam Cp calculations.
Dregs means the water below the spigot was sampled on a separate filter.
MP means a Millipore filter funnel was used to filter the water rather than
in-line filtration because of the high concentrations.
 
The Dregs Concentration is the mass filtered from below the bottle spigots divided
by the volume of the water filtered from below the spigots, so it includes the
particles in the water at the time the bottle was closed.  It is assumed that the
excess particles below the spigots were distributed throughout the bottle at the time
of closure (probably in the form of aggregates).  The measured volume of the water
bottles used in NABE was 29.6 liters.