(1) FILE NAME: 9607ctdb.oga DATA FILE NAME: 9607ctdb.ogb (2) YEAR and MONTH: 1996, July (3) PI: Dr. Jack Blanton (4) OTHERS: Julie Amft, Kristen O'Malley (5) BRIEF DESCRIPTION of DATA FILE: 1m vertical bin averages of 15 CTD casts, including calibrated OBS and uncalibrated chlorophyll a fluorescence, taken aboard the R/V Blue Fin and R/V El Mar on the Ogeechee River at low water and during an ebb tide on July 23, 1996. (6) KEYWORDS: Ogeechee, CTD (7) RESEARCH LOCATION: The Ogeechee River from OG+000.4 to OG+028.0 (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 OG+002: Low Water at 1950 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: 9607ctdb.ogb 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: 98 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