(1) FILE NAME: 9607ctda.sma DATA FILE NAME: 9607ctda.smb (2) YEAR and MONTH: 1996, July (3) PI: Dr. Jack Blanton (4) OTHERS: Kristen O'Malley (5) BRIEF DESCRIPTION of DATA FILE: 1m vertical bin averages of 17 CTD casts, including calibrated OBS and uncalibrated chlorophyll a fluorescence, taken aboard the R/V Blue Fin on the St Marys River at both high and low water on July 18, 1996. (6) KEYWORDS: St Marys, CTD (7) RESEARCH LOCATION: The St Marys River from SM-000.6 to SM+033.9 (2 digit river code + 4 digit code for distance from river mouth in km). (8) EXPERIMENTAL DESIGNS AND METHODS: Casts were taken with a SeaBird Electronics CTD25 (S/N 64). After soaking at the surface for approximately 45 seconds, the CTD was lowered to the bottom by a power winch and then held there for an additional 45 seconds before being raised to the surface. The collected data's downcasts were processed using standard SeaBird software to produce the 1m vertical bin averages. (9) NOTES AND COMMENTS: Each cast has a header that contains information in the following order: cast number, station location, date, time (EST), max water depth (M), latitude (N in degrees and minutes), and longitude (W in degrees and minutes). Estimated predicted tidal height at station SM+003: High Water at 0948 EST and Low Water at 1602 EST. (10) VARIABLE DESCRIPTION: VARIABLE VARIABLE DESCRIPTION PRES/UNITS CODED -------- -------------------- ---------- ----- cast cast number N depth depth 0.1 M N temp temperature 0.01 deg C N sal salinity 0.01 PSU N sig sigma-t (density) 0.01 Kg/M^3 N fluor uncalibrated chlorophyll a fluorescence 0.01 V*6 N obs calibrated optical 0.1 mg/L N backscatterence (11) CALCULATIONS: Salinity=PSS-78 Sigma-t=p(s,t,O)-1000 Both salinity and sigma-t were computed by the SeaBird software program. The formulas used were obtained from "Algorithms for Computation of Fundamental Properties of Seawater" by N.P. Fofonoff and R.C. Millard Jr.; Unesco technical papers in marine science #44, 1983. (12) FOR MORE INFORMATION CONTACT: Julie Amft Skidaway Institute of Oceanography 10 Ocean Science Circle Savannah, GA 31411 (13) OTHER DATA FILES TO REFERENCE: (14) REFERENCE CITATIONS: None (15) FORMAT OF VARIABLES: FILENAME: 9607ctda.smb Column # Column Name Type Width Decimals -------- ----------- ---- ----- -------- 1 Cast numeric 7 0 2 Depth numeric 9 1 3 Temp numeric 8 2 4 Sal numeric 8 2 5 Sig numeric 8 2 6 Fluor numeric 8 2 7 OBS numeric 8 1 (16) NUMBER of RECORDS: 184 lines (17) STATUS: Type 2 (18) FOR ARCHIVAL USE: Data File Validated By: Julie Amft Date: October 1996 Date Entered To Database: 23 October 1996 Log Of Changes And Comments: 08 June 2000 - Corrected Header Line times to Eastern Standard Time from Eastern Daylight Time. tdb