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 CTD Profiler (model # SBE 9) Sea-Bird 
Electronics, Inc. Bellevue, WA.  The profiler samples its sensors at a programmable 
rate up to 24 hertz, 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 6800            +/- 0.25%              0.015%
Temperature (deg C)            -5 to +35             +/- 0.002              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).

Regression developed by A. Winkelman (GLERL) using water samples and CTD transmissometry 
from surv-1999-116, surv-1999-229, and surv-2000-101 Shenehon cruises:

    For 1999 & 2000:
    TSM (mg/l) = (1.65) * Atten - 0.67