I. Data Set Descriptors A. Title: Samantha B. Joye. 2010. Hammock groundwater well pressure, temperature, conductivity, salinity, density, resistivity and total suspended solid measurements for PC_i_29_WELL_LOC_5 from 15-Aug-2008 to 18-Jun-2010. Georgia Coastal Ecosystems LTER Data Catalog (data set HYD-GCES-1401b; http://gce-lter.marsci.uga.edu/public/app/dataset_details.asp?accession=HYD-GCES-1401b) B. Accession Number: HYD-GCES-1401b C. Description 1. Originator(s): Name: Samantha B. Joye Address: Department of Marine Sciences, University of Georgia, Athens, Georgia Postal Code: 30602 Country: USA Email: mjoye@uga.edu 2. Abstract: Groundwater pressure, temperature, conductivity, salinity, density, resistivity and total suspended solids were measured in a PVC groundwater well at 10 minute intervals using an InSitu AquaTroll 200 logger from 15-Aug-2008 to 07-Sep-2008. Data were downloaded from the logger and processed using Win-Situ software, then imported into MATLAB for post-processing, quality control and documention. Raw, unvented pressure readings were corrected for atmospheric pressure and sensor height from the bottom of the well to generate corrected pressure readings. These data were collected as part of the Georgia Coastal Ecosystems LTER Intensive Hammock Characterization project (http://gce-lter.marsci.uga.edu/public/app/send_project_eml.asp?id=57), and will be used for groundwater modeling studies at two marsh hammocks on Sapelo Island, Georgia. 3. Study Type: Monitoring 4. Study Themes: Hydrology, Groundwater 5. LTER Core Areas: Inorganic Fluxes 6. Georeferences: geographic coordinates as data columns 7. Submission Date: 11-Feb-2010 D. Keywords: pressure, temperature, conductivity, salinity, density, resistivity, total suspended solids, well, groundwater, hammock, hydrostatic II. Research Origin Descriptors A. Overall Project Description 1. Project Title: Georgia Coastal Ecosystems LTER Project 2. Principal Investigators: Name: Merryl Alber Address: Dept. of Marine Sciences, University of Georgia, Athens, Georgia Postal Code: 30602-3636 Country: USA Email: malber@uga.edu Name: Steven C. Pennings Address: Department of Biology and Biochemistry, University of Houston, Houston, Texas Postal Code: 7204-5513 Country: USA Email: spennings@uh.edu 3. Funding Period: 01-May-2000 to 31-Dec-2012 4. Objectives: To investigate the linkages between coastal and distant upland areas in central Georgia mediated by surface and ground water delivery to the coastal zone. This will be addressed by examining the relationship between variability in environmental factors driven by river flow, primarily salinity, and ecosystem processes and structure. 5. Abstract: The Georgia Coastal Ecosystems (GCE) LTER program, located on the central Georgia coast, was established in 2000. The study domain encompasses three adjacent sounds (Altamaha, Doboy, Sapelo) and includes upland (mainland, barrier islands, marsh hammocks), intertidal (fresh, brackish and salt marsh) and submerged (river, estuary, continental shelf) habitats. Patterns and processes in this complex landscape vary spatially within and between sites, and temporally on multiple scales (tidal, diurnal, seasonal, and interannual). Overlain on this spatial and temporal variation are long-term trends caused by climate change, sea level rise, and human alterations of the landscape. These long-term trends are likely to manifest in many ways, including changes in water quality, river discharge, runoff and tidal inundation patterns throughout the estuarine landscape. The overarching goal of the GCE program is to understand the mechanisms by which variation in the quality, source and amount of both fresh and salt water create temporal and spatial variability in estuarine habitats and processes, in order to predict directional changes that will occur in response to long-term shifts in estuarine salinity patterns. 6. Funding Source: NSF OCE 9982133 and OCE-0620959 B. Sub-project Description 1. Site Description a. Geographic Location: PC_i_29_WELL_LOC_5 -- Hammock PC_i_29 Well Location 5 Coordinates: PC_i_29_WELL_LOC_5 -- 81 16 41.7 W, 31 23 40.2 N b. Physiographic Region: PC_i_29_WELL_LOC_5 -- Back-barrier island c. Landform Components: PC_i_29_WELL_LOC_5 -- Marsh hammock d. Hydrographic Characteristics: PC_i_29_WELL_LOC_5 -- Site is subject to 2-3m semi-diurnal tides e. Topographic Attributes: PC_i_29_WELL_LOC_5 -- Flat, with elevations ranging from 0-3m above mean low tide f. Geology, Lithology and Soils: PC_i_29_WELL_LOC_5 -- Pleistocene sediments g. Vegetation Communities: PC_i_29_WELL_LOC_5 -- unspecified h. History of Land Use and Disturbance: i. Climate: Climate summary for Sapelo Island, Georgia, based on NWS data from 1980-2001: Daily-aggregated Values: Mean (sample standard deviation) mean air temperature: 19.78°C (6.98°C) minimum air temperature: 14.64°C (7.54°C) maximum air temperature: 24.62°C (6.78°C) total precipitation: 3.58mm (11.35mm) Yearly-aggregated Values: Mean (sample standard deviation) total precipitation (1981-2000): 1302mm (250mm) 2. Experimental or Sampling Design a. Design Characteristics: Groundwater pressure, temperature, conductivity, salinity, density, resistivity and total suspended solids were measured continously to characterize changes in water table and groundwater flow in two marsh Hammocks on Sapelo Island, Georgia. b. Permanent Plots: none c. Data Collection Duration and Frequency: Groundwater pressure, temperature, conductivity, salinity, density, resistivity and total suspended solids were measured continuously and logged at 10 minute intervals by an automated data logger installed in a PVC groundwater well. Beginning of Observations: 15-Aug-2008 End of Observations: 18-Jun-2010 3. Research Methods a. Field and Laboratory Methods: Method 1: Hammock Selection -- In 2008 we selected two hammocks for detailed study: HN_I_1 is of Holocene origin and is located adjacent to Blackbeard Island to the north of Sapelo Island, Georgia; PC_I_29 is of Pleistocene origin and is located adjacent to the south end of Sapelo Island. These hammocks are of similar size, with similar vegetation zones in the high marsh. We set up transects in each hammock that run from the nearby upland (Blackbeard and Sapelo Islands, respectively), through the marsh, and up and over each hammock to the marsh adjacent to the Sound (Sapelo and Doboy, respectively). Method 2: Well Installation -- On each hammock, groundwater wells were installed along the transects in the locations sampled by vibracore. Wells were placed in sand layers in order to prevent clogging and to allow sampling of a continuously connected groundwater source. In addition to the vibracore stations, two additional lateral wells were installed at HN_I_1 approximately 5 meters to either side of the main transect near well #4 in order to get data on lateral inflow of groundwater. An additional upland well was also installed at this site in order to obtain a true zero salinity end member. The wells range in depth from 41 to 110 cm below a constant zero datum (99 to 232 cm below the surface). At PC_I_29, the two lateral wells are located near well #6. Well depths at this site range between 75 and 168 cm below a zero datum (130 to 247 cm below the surface). Method 3: Groundwater Measurements -- Groundwater pressure, temperature and conductivity were measured using an In-Situ Aqua TROLL data logger installed in a PVC well, suspended from the top of the well using a metal cable so that the sensor was appoximately 0.25m from the well bottom. Sensors are retrieved and data are downloaded approximately semi-monthly. Depth, salinity, density, resistivity and total dissolved solids were then calculated from pressure, temperature and conductivity by the data logger automatically. Method 4: Data Post-processing -- Raw binary data were converted to ASCII text files using Win-Situ software provided with the instrument. Text files were then imported into MATLAB using the GCE Data Toolbox for MATLAB, and integrated with metadata about well location, sensor placement and well elevation. Complete data sets were then quality-controlled using automated QA/QC rules and visual inspection. b. Instrumentation: Method 1: none Method 2: Pressure Sensor Manufacturer: In-Situ (Model: Aqua TROLL 200, vented) Parameter: Pressure (Accuracy: +/-0.1% from 0-50C) Parameter: Temperature (Accuracy: +/-0.1 C, Range: -20C to 65C) Parameter: Conductivity (Accuracy: +/-0.5% <80,000 uS/cm, +/-1% >80,000 uS/cm, Range: 5-100,000 uS/cm) Parameter: Salinity (Range: 0-42 PSU) Parameter: Resistivity (Range: 10-200000 Ohms-cm) Parameter: Density (Range: 0.98-1.14 g/cm^3) Parameter: Total Dissolved Solids (Range: 0-82 ppt) Method 3: none Method 4: none c. Taxonomy and Systematics: Method 1: none Method 2: none Method 3: none Method 4: none d. Speclies List: e. Permit History: Method 1: none Method 2: none Method 3: none Method 4: none 4. Project Personnel a. Personnel: 1: Samantha B. Joye 2: Charles Schutte 3: Kristen Anstead 4: Wade Sheldon b. Affiliations: 1: University of Georgia, Athens, Georgia 2: University of Georgia, Athens, Georgia 3: University of Georgia Marine Institute, Sapelo Island, Georgia 4: University of Georgia, Athens, Georgia III. Data Set Status and Accessibility A. Status 1. Latest Update: 24-Jun-2015 2. Latest Archive Date: 3. Latest Metadata Update: 24-Jun-2015 4. Data Verification Status: B. Accessibility 1. Storage Location and Medium: Stored at GCE-LTER Data Management Office Dept. of Marine Sciences Univ. of Georgia Athens, GA 30602-3636 USA on media: electronic data download (WWW) or compact disk 2. Contact Person: Name: Wade M. Sheldon, Jr. Position: GCE-LTER Information Manager Address: Dept. of Marine Sciences, University of Georgia, Athens, Georgia Postal Code: 30602-3636 Country: USA Email: gcelter@uga.edu 3. Copyright Restrictions: not copyrighted 4. Restrictions: All publications based on this data set must cite the contributor and Georgia Coastal Ecosystems LTER project, and two copies of the manuscript must be submitted to the GCE-LTER Information Management Office. a. Release Date: Affiliates: 10-Aug-2011, Public: 09-Aug-2012 b. Citation: Data provided by the Georgia Coastal Ecosystems Long Term Ecological Research Project, supported by funds from NSF OCE 9982133 c. Disclaimer: The user assumes all responsibility for errors in judgement based on interpretation of data and analyses presented in this data set. 5. Costs: free electronic data download via WWW, distribution on CD may be subject to nominal processing and handling fee IV. Data Structural Descriptors A. Data Set File 1. File Name: HYD-GCES-1401b_PC_i_29_Well_5_AT_aug08-jun10_1_0.CSV 2. Size: 96788 records 3. File Format: ASCII text (comma-separated value format) 3a. Delimiters: single comma 4. Header Information: 5 lines of ASCII text 5. Alphanumeric Attributes: upper case 6. Quality Control Flag Codes: I = invalid value, Q = questionable value, X = excise record flag (data collected under unsuitable conditions), E = estimated value based on interpolation 7. Authentication Procedures: not specified 8. Calculations: Date(serial day (base 1/1/0000) - GMT) = Date(serial day (base 1/1/0000) - EST)+(5/24) Pressure_Corrected(Pa) = Pressure_Corrected(PSI) * 6894.7573 Density(kg/m^3) = Density(g/cm^3) * 1000 Water_Elevation: Water_Elevation = Sensor_Elevation + Depth 9. Processing History: Software version: GCE Data Toolbox Version 3.9.3 (06-Apr-2015) Data structure version: GCE Data Structure 1.1 (29-Mar-2001) Original data files processed: AQ_PCi29_Well5_129398_20080815-20080907_filtered.asc (3321 records) AQ_PCi29_Well5_129398_20080917-20090126_filtered.asc (20297 records) AQ_PCi29_Well5_129398_20090126-20090406_filtered.asc (10059 records) AQ_PCi29_Well5_129398_20090406-20090622_filtered.asc (11102 records) AQ_PCi29_Well5_129398_20090622-20090928_filtered.asc (14069 records) AQ_PCi29_Well5_129398_20090928-20091217_filtered.asc (11532 records) AQ_PCi29_Well5_129398_20091217-20100428_filtered.asc (6181 records) AQ_PCi29_Well5_129398_20100428-20100618_filtered.asc (7303 records) Data processing history: 10-Aug-2011: new GCE Data Structure 1.1 created ('newstruct') 10-Aug-2011: 3321 rows imported from ASCII data file 'AQ_PCi29_Well5_129398_20080815-20080907_filtered.asc' ('imp_ascii') 10-Aug-2011: 5 metadata fields in file header parsed ('parse_header') 10-Aug-2011: data descriptor metadata updated based on the template 'GCE_AquaTroll_Logger' ('meta_template') 10-Aug-2011: data structure validated ('gce_valid') 10-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 10-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 10-Aug-2011: updated 2 metadata fields in the Dataset, Status sections ('addmeta') 10-Aug-2011: updated 2 metadata fields in the Dataset, Status sections ('addmeta') 10-Aug-2011: copied/reordered columns Year, Month, Day, Hour, Minute, Second, Pressure_Corrected, Temperature, Depth, Conductivity, Specific_Conductivity, Salinity, Total_Dissolved_Solids, Resistivity and Density ('copycols') 10-Aug-2011: deleted column Second from the structure ('deletecols') 10-Aug-2011: calculated numeric MATLAB serial date from individual date component columns, added 'Date' column at position 1 ('add_datecol') 10-Aug-2011: 1659 values in 'Date' were updated with new values ('update_data') 10-Aug-2011: Q/C flagging criteria applied for column(s) Date, 'flags' field updated ('dataflag') 10-Aug-2011: converted units of 'Date' column from serial day (base 1/1/0000) - EST to serial day (base 1/1/0000) - GMT ('unit_convert') 10-Aug-2011: deleted existing datetime columns Year, Month, Day, Hour and Minute; updated Year, Month, Day, Hour and Minute datetime columns added after column Date ('add_datepartcols') 10-Aug-2011: converted units of 'Pressure_Corrected' column and 1 QA/QC flag criteria parameters from PSI to Pa ('unit_convert') 10-Aug-2011: converted units of 'Density' column and 1 QA/QC flag criteria parameters from g/cm^3 to kg/m^3 ('unit_convert') 10-Aug-2011: updated 5 metadata fields in the Dataset, Status sections ('addmeta') 10-Aug-2011: added column 'Sensor_Elevation' at position 7 ('addcol') 10-Aug-2011: added column 'Sensor' at position 7 ('addcol') 10-Aug-2011: added column 'Latitude' at position 7 ('addcol') 10-Aug-2011: Q/C flagging criteria applied for column(s) Latitude, 'flags' field updated ('dataflag') 10-Aug-2011: added column 'Longitude' at position 7 ('addcol') 10-Aug-2011: Q/C flagging criteria applied for column(s) Longitude, 'flags' field updated ('dataflag') 10-Aug-2011: added column 'Location' at position 7 ('addcol') 10-Aug-2011: added column 'Hammock' at position 7 ('addcol') 10-Aug-2011: added geographic metadata based on matching values in column Location to location and station names registered in 'geo_locations.mat' ('add_sitemetadata') 10-Aug-2011: updated 9 metadata fields in the Site, Status sections ('add_sitemetadata') 10-Aug-2011: updated title ('newtitle') 10-Aug-2011: updated 2 metadata fields in the Dataset, Status sections ('newtitle') 10-Aug-2011: calculated column Water_Elevation generated by the expression 'Sensor_Elevation + Depth' (add_calcexpr) 10-Aug-2011: updated 2 metadata fields in the Data, Status sections ('addmeta') 11-Aug-2011: 20297 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 10065 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 11102 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 14069 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 11532 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 6181 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: 7303 rows added at the bottom of the data set ('datamerge') 11-Aug-2011: updated 59 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 11-Aug-2011: updated title ('newtitle') 11-Aug-2011: updated 2 metadata fields in the Dataset, Status sections ('newtitle') 11-Aug-2011: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 11-Aug-2011: manually edited data set metadata ('ui_editmetadata') 11-Aug-2011: edited data set title in structure and metadata ('ui_editor') 11-Aug-2011: sorted by columns Year(ascending), Month(ascending), Day(ascending), Hour(ascending), Minute(ascending) ('sortdata') 11-Aug-2011: removed 12 row(s) with duplicate values in the column(s) Year, Month, Day, Hour and Minute ('cleardupes') 11-Aug-2011: inserted 12930 new records with date/time values and NaN/null data values (replicating common values in the non-data columns Hammock, Location, Longitude, Latitude and Sensor) to fill in date/time interval gaps in the data series ('fill_date_gaps') 11-Aug-2011: sorted by column Date(ascending) ('sortdata') 11-Aug-2011: deleted existing datetime columns Year, Month, Day, Hour and Minute; updated Year, Month, Day, Hour and Minute datetime columns added after column Date ('add_datepartcols') 11-Aug-2011: QA/QC flags assigned by visual inspection (ui_visualqc); flags set on 451 records in Pressure_Corrected 11-Aug-2011: copied QA/QC flags for column(s) Depth and Water_Elevation to column(s) Pressure_Corrected, overwriting any existing flags, and set QA/QC criteria for destination column(s) to 'manual' ('copyflags') 11-Aug-2011: copied QA/QC flags from column(s) Pressure_Corrected to column(s) Temperature, Conductivity, Specific_Conductivity, Salinity, Total_Dissolved_Solids, Resistivity and Density, merging copied flags with any existing flags, and set QA/QC criteria for destination column(s) to 'manual' ('copyflags') 11-Aug-2011: documented flagged and missing values in columns Sensor, Sensor_Elevation, Pressure_Corrected, Temperature, Depth, Water_Elevation, Conductivity, Specific_Conductivity, Salinity, Total_Dissolved_Solids, Resistivity and Density as data set anomalies in the metadata ('add_anomalies') 19-Aug-2012: documented flagged and missing values in columns Sensor, Sensor_Elevation, Pressure_Corrected, Temperature, Depth, Water_Elevation, Conductivity, Specific_Conductivity, Salinity, Total_Dissolved_Solids, Resistivity and Density as data set anomalies in the metadata ('add_anomalies') 24-Jun-2015: renamed column 'Sensor' to 'Sensor_ID' and propagated the change to any dependent Q/C flag criteria ('rename_column') 24-Jun-2015: added column 'Sensor_Model' at position 11 ('addcol') 24-Jun-2015: updated 1 metadata fields in the Dataset sections ('addmeta') 24-Jun-2015: converted dates in column(s) Date to format yyyy-mm-dd HH:MM:SS 24-Jun-2015: flags for columns Sensor_Elevation, Pressure_Corrected, Temperature, Depth, Water_Elevation, Conductivity, Specific_Conductivity, Salinity, Total_Dissolved_Solids, Resistivity and Density converted to data columns, flag codes updated in metadata ('flags2cols') 24-Jun-2015: updated 6 metadata fields in the Data sections ('addmeta') 24-Jun-2015: updated 15 metadata fields in the Status, Data sections to reflect attribute metadata ('updatecols') 24-Jun-2015: parsed and formatted metadata ('listmeta') B. Variable Information 1. Variable Name: column 1. Date column 2. Year column 3. Month column 4. Day column 5. Hour column 6. Minute column 7. Hammock column 8. Location column 9. Longitude column 10. Latitude column 11. Sensor_Model column 12. Sensor_ID column 13. Sensor_Elevation column 14. Flag_Sensor_Elevation column 15. Pressure_Corrected column 16. Flag_Pressure_Corrected column 17. Temperature column 18. Flag_Temperature column 19. Depth column 20. Flag_Depth column 21. Water_Elevation column 22. Flag_Water_Elevation column 23. Conductivity column 24. Flag_Conductivity column 25. Specific_Conductivity column 26. Flag_Specific_Conductivity column 27. Salinity column 28. Flag_Salinity column 29. Total_Dissolved_Solids column 30. Flag_Total_Dissolved_Solids column 31. Resistivity column 32. Flag_Resistivity column 33. Density column 34. Flag_Density 2. Variable Definition: column 1. Calendar date and time of observation column 2. Calendar year column 3. Calendar month column 4. Calendar day column 5. Hours - GMT column 6. Minutes column 7. Hammock id where well is installed column 8. Location code of well in the GCE locations database column 9. Geographic longitude in decimal degrees column 10. Geographic latitude in decimal degrees column 11. Groundwater sensor model used for measurements column 12. Sensor ID (serial number) column 13. Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth column 14. QA/QC flags for Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth (flagging criteria, where "x" is Sensor_Elevation: ) column 15. Water pressure corrected for atmospheric pressure column 16. QA/QC flags for Water pressure corrected for atmospheric pressure (flagging criteria, where "x" is Pressure_Corrected: x<0="I", manual) column 17. Water temperature column 18. QA/QC flags for Water temperature (flagging criteria, where "x" is Temperature: x<-2="I", x<10="Q", x>40="Q", manual) column 19. Water depth column 20. QA/QC flags for Water depth (flagging criteria, where "x" is Depth: x<0="Q", manual) column 21. Water elevation relative to NAVD88 datum calculated from sensor elevation and water depth above the sensor column 22. QA/QC flags for Water elevation relative to NAVD88 datum calculated from sensor elevation and water depth above the sensor (flagging criteria, where "x" is Water_Elevation: manual) column 23. Actual conductivity column 24. QA/QC flags for Actual conductivity (flagging criteria, where "x" is Conductivity: manual) column 25. Specific conductivity column 26. QA/QC flags for Specific conductivity (flagging criteria, where "x" is Specific_Conductivity: manual) column 27. Salinity column 28. QA/QC flags for Salinity (flagging criteria, where "x" is Salinity: x<0="I", x>35="Q", manual) column 29. Total dissolved solids column 30. QA/QC flags for Total dissolved solids (flagging criteria, where "x" is Total_Dissolved_Solids: x<0="I", manual) column 31. Electrical resistivity column 32. QA/QC flags for Electrical resistivity (flagging criteria, where "x" is Resistivity: manual) column 33. Water density column 34. QA/QC flags for Water density (flagging criteria, where "x" is Density: x<0="I", manual) 3. Units of Measurement: column 1. yyyy-mm-dd HH:MM:SS - GMT column 2. YYYY column 3. MM column 4. DD column 5. hr column 6. min column 7. none column 8. none column 9. degrees column 10. degrees column 11. none column 12. none column 13. m column 14. none column 15. Pa column 16. none column 17. ºC column 18. none column 19. m column 20. none column 21. m column 22. none column 23. uS/cm column 24. none column 25. uS/cm column 26. none column 27. PSU column 28. none column 29. ppt column 30. none column 31. Ohms-cm column 32. none column 33. kg/m^3 column 34. none 4. Data Type a. Storage Type: column 1. string column 2. integer column 3. integer column 4. integer column 5. integer column 6. integer column 7. string column 8. string column 9. floating-point column 10. floating-point column 11. string column 12. string column 13. floating-point column 14. string column 15. floating-point column 16. string column 17. floating-point column 18. string column 19. floating-point column 20. string column 21. floating-point column 22. string column 23. floating-point column 24. string column 25. floating-point column 26. string column 27. floating-point column 28. string column 29. floating-point column 30. string column 31. floating-point column 32. string column 33. floating-point column 34. string b. Variable Codes: Flag_Pressure_Corrected: I = invalid value Flag_Temperature: I = invalid value Flag_Depth: I = invalid value Flag_Water_Elevation: I = invalid value Flag_Conductivity: I = invalid value Flag_Specific_Conductivity: I = invalid value Flag_Salinity: I = invalid value Flag_Total_Dissolved_Solids: I = invalid value Flag_Resistivity: I = invalid value Flag_Density: I = invalid value c. Numeric Range: column 1. (none) column 2. 2008 to 2010 column 3. 1 to 12 column 4. 1 to 31 column 5. 0 to 23 column 6. 0 to 50 column 7. (none) column 8. (none) column 9. -81.2782 to -81.2782 column 10. 31.3945 to 31.3945 column 11. (none) column 12. (none) column 13. -0.177 to -0.177 column 14. (none) column 15. -2187.2308 to 16862.1011 column 16. (none) column 17. 10.7362 to 32.7386 column 18. (none) column 19. -0.22039 to 1.6991 column 20. (none) column 21. -0.39739 to 1.5221 column 22. (none) column 23. 0 to 29525.2109 column 24. (none) column 25. 0 to 30133.0996 column 26. (none) column 27. 0 to 18.9373 column 28. (none) column 29. 0 to 19586.5137 column 30. (none) column 31. 33.8694 to 10000000 column 32. (none) column 33. 994.792 to 1011.706 column 34. (none) d. Missing Value Code: 5. Data Format a. Column Type: column 1. text column 2. numerical column 3. numerical column 4. numerical column 5. numerical column 6. numerical column 7. text column 8. text column 9. numerical column 10. numerical column 11. text column 12. text column 13. numerical column 14. text column 15. numerical column 16. text column 17. numerical column 18. text column 19. numerical column 20. text column 21. numerical column 22. text column 23. numerical column 24. text column 25. numerical column 26. text column 27. numerical column 28. text column 29. numerical column 30. text column 31. numerical column 32. text column 33. numerical column 34. text b. Number of Columns: 34 c. Decimal Places: column 1. 0 column 2. 0 column 3. 0 column 4. 0 column 5. 0 column 6. 0 column 7. 0 column 8. 0 column 9. 6 column 10. 6 column 11. 0 column 12. 0 column 13. 4 column 14. 0 column 15. 3 column 16. 0 column 17. 3 column 18. 0 column 19. 3 column 20. 0 column 21. 4 column 22. 0 column 23. 3 column 24. 0 column 25. 3 column 26. 0 column 27. 3 column 28. 0 column 29. 3 column 30. 0 column 31. 3 column 32. 0 column 33. 3 column 34. 0 6. Logical Variable Type: column 1. datetime (none) column 2. datetime (discrete) column 3. datetime (discrete) column 4. datetime (discrete) column 5. datetime (discrete) column 6. datetime (discrete) column 7. nominal (none) column 8. nominal (none) column 9. geographic coordinate (continuous) column 10. geographic coordinate (continuous) column 11. nominal (none) column 12. nominal (none) column 13. calculation (continuous) column 14. coded value (none) column 15. data (continuous) column 16. coded value (none) column 17. data (continuous) column 18. coded value (none) column 19. calculation (continuous) column 20. coded value (none) column 21. calculation (continuous) column 22. coded value (none) column 23. data (continuous) column 24. coded value (none) column 25. calculation (continuous) column 26. coded value (none) column 27. calculation (continuous) column 28. coded value (none) column 29. data (continuous) column 30. coded value (none) column 31. data (continuous) column 32. coded value (none) column 33. calculation (continuous) column 34. coded value (none) 7. Flagging Criteria: column 1. none column 2. none column 3. x<1="I";x>12="I" column 4. x<1="I";x>31="I" column 5. x<0="I";x>24="I" column 6. x<0="I";x>60="I" column 7. none column 8. none column 9. x<-180="I";x>180="I" column 10. x<-90="I";x>90="I" column 11. none column 12. none column 13. none column 14. none column 15. x<0="I";manually-assigned flags column 16. none column 17. x<-2="I";x<10="Q";x>40="Q";manually-assigned flags column 18. none column 19. x<0="Q";manually-assigned flags column 20. none column 21. manually-assigned flags column 22. none column 23. manually-assigned flags column 24. none column 25. manually-assigned flags column 26. none column 27. x<0="I";x>35="Q";manually-assigned flags column 28. none column 29. x<0="I";manually-assigned flags column 30. none column 31. manually-assigned flags column 32. none column 33. x<0="I";manually-assigned flags column 34. none C. Data Anomalies: Values of 8 records in Sensor are missing for date 09/28/2009. Values of 12936 records in Sensor_Elevation are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Pressure_Corrected were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Pressure_Corrected are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Temperature were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Temperature are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Depth were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Depth are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Water_Elevation were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Water_Elevation are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Conductivity were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Conductivity are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Specific_Conductivity were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Specific_Conductivity are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Salinity were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Salinity are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Total_Dissolved_Solids were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Total_Dissolved_Solids are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Resistivity were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Resistivity are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. Values of 459 records in Density were flagged as I (invalid value) for dates: 09/07/2008, 10/22/2008, 11/22/2008, 03/25/2009-03/28/2009, 12/02/2009. Values of 12936 records in Density are missing for dates: 09/07/2008, 01/26/2009, 03/08/2009, 04/06/2009, 06/22/2009, 09/28/2009, 12/17/2009-12/18/2009, 01/29/2010-04/29/2010. V. Supplemental Descriptors A. Data Acquisition 1. Data Forms: Digital copies of data logger files are maintained in the GCE-LTER Information Management office and UGA Marine Institute on Sapelo Island. 2. Form Location: GCE-LTER Information Management Office, Dept. of Marine Sciences, University of Georgia, Athens, GA 30602 3. Data Entry Validation: B. Quality Assurance/Quality Control Procedures: QA/QC flags are generated automatically according to domain criteria specified for each data column, then subsequently reviewed and revised as appropriate. Coded flag columns are generated for each data column, listing qualifier flags assigned to the data value on the corresponding row. C. Supplemental Materials: not applicable D. Computer Programs: Win-Situ Mobile 5.4.1.4, MATLAB R2009B E. Archival Practices: Data sets and documentation are stored in structured binary (Matlab 6.x files) and delimited ASCII text formats, and archived on magnetic tape and CD at the GCE LTER Information Management Office at the University of Georgia, Athens, Georgia, USA F. Publications: G. History of Data Set Usage 1. Data Request History: 2. Data Set Update History: not updated 3. Review History: none 4. Questions and Comments from Users: none