Andrew Winkelman
 NOAA/GLERL
 2205 Commonwealth Blvd.
 Ann Arbor, MI  48105-2945
 Phone:    (734) 741-2336
 Fax:      (734) 741-2055
 e-mail:   andy.winkelman@noaa.gov

CTD casts were taken with a Sea-Bird Electronics Seacat Profiler (model # SBE 19) 
Sea-Bird Electronics, Inc. Bellevue, WA.  The Seacat Profiler samples its sensors at 
a programmable rate up to 2 "scans" per second, providing the ability to characterize 
the water column with high accuracy, resolution, and fine-scale measurement performance.
Depth bins of 1m were used to smooth out the data.



Profiler Specifications:
                                 Range             Accuracy                   Resolution
Depth (meters)                  up to 600         +/- 0.25%                     0.015%
Temperature (deg C)             -5 to +35         +/- 0.001                     0.0003
Conductivity (S/m)               0 to 7           +/- 0.0003                    0.00004


Transmissometry was measured using the in situ transmissometer  (Output is 0 - 5 Volts, 
5 Volts = 0/m, 0 Volts =  55.262/m).  Total suspended matter (TSM) is derived from 
transmissometry output of beam attenuation coefficient (Atten).  Regression developed 
by A. Winkelman (GLERL) using water samples and CTD transmissometry from surv-1999-067 
cruise for 1999 and surv-2000-063, -070, -101, -108, and -116 for 2000:

        For 1999:
        TSM (mg/L) = (2.39) * Atten - 1.98
        N = 44, r^2 = 0.99

        For 2000:
        TSM (mg/L) = (1.65) * Atten - 0.86
        N = 51, r^2 = 0.99