(1) FILE NAME: 94mmdoca.oga (2) YEAR: 1994 (3) PI: Mary Ann Moran (4) OTHERS: Edward Sheppard, Joe Covert (5) DESCRIPTION OF DATA FILE: Dissolved organic carbon concentrations for the Ogeechee River at several sites. (6) KEYWORDS: Ogeechee River, dissolved organic carbon, humic acid fraction, non-humic acid fraction, salinity. (7) RESEARCH LOCATION: Locations indicated as distance upstream from river mouth. (8) EXPERIMENTAL DESIGNS AND METHODS: Water samples were filtered through GF-F filters in glass filtration units and stored at 4 degrees C until processing. Immediately before analysis, samples were acidified to pH 3.5 with 100% phosphoric acid, bubbled with CO2-free air for 2 minutes. Samples were then injected into a Shimadzu TOC 5000 carbon analyzer standardized with potassium biphthalate. (9) NOTES AND COMMENTS: None (10) DESCRIPTION OF VARIABLES: Variable Variable description Precision/Units Coded SAMPLE location of collection 0.5/km y DEPTH Depth of collection 1.0/m n DATE date of collection ddmmyy n SALINITY precision salinity units 0.01/ppt n DOC dissolved organic carbon 0.5/mg C/L n C-DOC corrected DOC 0.5/mg C/L n NH non-humic fraction 0.5/mg C/L n C-NH corrected non-humic 0.5/mg C/L n H Humic fraction 0.5/mg C/L n C-H corrected humic 0.5/mg C/L n CODES: River designator +3 digit code for distance (km) from river mouth. (11) CALCULATIONS: VARIABLE FORMULA C-DOC DOC - [C] OF BIOGRADE WATER BLANK C-NH NH - [C] OF BIOGRADE WATER BLANK C-H H - [C] OF BIOGRADE WATER (12) FOR MORE INFORMATION, CONTACT: Dr. Mary Ann Moran Dept. of Marine Sciences University of Georgia Athens, GA 30602 (706) 542-6481 (voice) (706) 542-5888 (fax) mmoran@uga.cc.uga.edu (13) OTHER DATA FILES TO REFERENCE: (xx denotes any of the five river codes) 94mmdoca.xxa, 94mmdoca.xxb 95mmdoca.xxa, 95mmdoca.xxb 95mmdocb.xxa, 95mmdocb.xxb 96mmdoca.xxa, 96mmdoca.xxb (14) REFERENCE CITATIONS: None (15) FORMAT OF VARIABLES: FILE NAME: 94mmdoca.ogb Column No. Column name Type Width Decimals 1 SITE ALPHANUMERIC 10 0 2 DEPTH NUMERIC 3 1 3 DATE DATE 6 0 4 SALINITY NUMERIC 5 2 5 DOC NUMERIC 5 2 6 C-DOC NUMERIC 5 2 7 NH NUMERIC 4 2 8 C-NH NUMERIC 4 2 9 H NUMERIC 5 2 10 C-H NUMERIC 5 2 (16) NUMBER OF RECORDS: 5 (17) STATUS: TYPE 2 (18) FOR ARCHIVAL USE Date File Validated By: Date: Date Received By Data Management: Date Entered To Database: Log Of Changes And Comments: