R/V Blue Fin continental shelf cruises 1988-1993

File Format:
1. Header
   a. Location: latitude and longitude, e.g., 30 54.5N 80 03.3W  
                means 30 degrees 54.5 minutes North, and 80 degrees 3.3 minutes west.
   b. Depth: total water depth at this location.
   c. Time: time of observation, e.g., 1435EDT means 14:35EDT
2. Data
   a. depth: sample depth in meters.
   b. temperature: in Celisus Degrees.
   c. salinity: Practical Salinity Units.
   d. chlorophyll a: corrected against chlorophyll samples that were run in 
                     a high performance liquid chromatograph. (mg/m^3)

Methods documentation

CTD casts

SeaBird SBE 19 profiler (Serial No. 40) with Sea Tech fluorometer
equipped with filters for sensing chlorophyll a in phytoplankton.  
Voltage output calibrated against discrete filtered samples analyzed 
by Joan E. Sheldon using high performance liquid chromatography.  
HPLC Chlorophyll a was standardized against chlorophyll separated 
from spinach in a Tswett column by Shirley Nishino or against 
commercial Chlorophyll a by J. E. Sheldon.

On most cruises a number of discrete water samples were taken with 
Niskin samplers and salinity was measured at the Skidaway Institute 
in a precision salinometer.  On most cruises surface water temperature 
was taken with a bucket thermometer for comparison with the CTD.  
The mercury thermometer in the bucket thermometer was calibrated against 
an NBS substandard mercury thermometer.

The pressure sensor for estimating depth as decibars was originally 
calibrated at the factory and occasionally re-calibrated when the 
instrument was returned for maintenance.

Depth range of this instrument is 300 m.