Identification_Information: Citation: Citation_Information: Originator: Rabalais, N. Publication_Date: Unknown Title: Louisiana Coastal Hypoxia Shelfwide Survey, July 1995 Geospatial_Data_Presentation_Form: Database Description: Abstract: Hydrographic data were collected during a July 21 - 26, 1995 survey of the Louisiana continental shelf. Nutrient, pigment, suspended sediment and station information data were also acquired. Purpose: The physical, biological and chemical data collected are part of a long-term coastal Louisiana dataset. The goal is to understand physical and biological processes that contribute to the causes of hypoxia and use the data to support environmental models for use by resource managers. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19950721 Beginning_Time: Unknown Ending_Date: 19950726 Ending_Time: Unknown Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Description_of_Geographic_Extent: Louisiana coastal waters, Northwestern Gulf of Mexico. Bounding_Coordinates: West_Bounding_Coordinate: -93.61 East_Bounding_Coordinate: -89.42 North_Bounding_Coordinate: 29.71 South_Bounding_Coordinate: 28.39 Data_Set_G-Polygon: Data_Set_G-Polygon_Outer_G-Ring: G-Ring_Point: G-Ring_Latitude: 29.71 G-Ring_Longitude: -93.61 G-Ring_Point: G-Ring_Latitude: 28.39 G-Ring_Longitude: -89.42 G-Ring_Point: G-Ring_Latitude: 28.39 G-Ring_Longitude: -93.61 G-Ring_Point: G-Ring_Latitude: 29.71 G-Ring_Longitude: -89.42 G-Ring_Point: G-Ring_Latitude: 29.71 G-Ring_Longitude: -93.61 Keywords: Theme: Theme_Keyword_Thesaurus: GCMD NASA's Global Change Master Dir. THEME Theme_Keyword: EARTH SCIENCE > Biosphere > Ecological Dynamics > Biogeochemical Cycles Theme_Keyword: EARTH SCIENCE > Biosphere > Ecological Dynamics > Nutrient Cycling Theme_Keyword: EARTH SCIENCE > Biosphere > Ecological Dynamics > Oxygen Demand Theme_Keyword: EARTH SCIENCE > Biosphere > Ecological Dynamics > Primary Production Theme_Keyword: EARTH SCIENCE > Human Dimensions > Environmental Impacts > Eutrophication Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Chlorophyll Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Conductivity Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Light Transmission Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Nitrogen Compounds Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Nutrients Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Oxygen Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > pH Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Suspended Solids Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Water Temperature Theme_Keyword: EARTH SCIENCE > Oceans > Coastal Processes Theme_Keyword: EARTH SCIENCE > Oceans > Marine Environment Monitoring Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Ammonia > Ammonium Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Biogeochemical Cycles Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Chlorophyll Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrate Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrite Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrogen Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nutrients Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Oxygen Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > pH Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Phosphate Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Pigments Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Silicate Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Circulation > Fronts Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Optics > Secchi Depth Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Temperature Theme_Keyword: EARTH SCIENCE > Oceans > Salinity/Density Place: Place_Keyword_Thesaurus: GCMD NASA's Global Change Master Dir. PLACE Place_Keyword: Gulf Of Mexico Place_Keyword: North Atlantic Ocean Place_Keyword: United States Of America Place_Keyword: North America Place_Keyword: Northern Hemisphere Place_Keyword: Sea Surface Access_Constraints: None Use_Constraints: 1. Dataset credit required. 2. Experience with similar datasets has shown that when data are plotted or used in further analysis, outlying values may occasionally be discovered. Please report any possible problems with the data to N. Rabalais. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Nancy N. Rabalais Contact_Organization: Louisiana Universities Marine Consortium Contact_Address: Address_Type: mailing address Address: Louisiana Universities Marine Consortium 8124 Hwy 56 City: Chauvin State_or_Province: LA Postal_Code: 70344 Country: USA Contact_Voice_Telephone: 985 851 2800 Contact_Facsimile_Telephone: 985 851 2874 Contact_Electronic_Mail_Address: Unknown Data_Set_Credit: Rabalais, N.N., Turner, R.E. and Wiseman Jr, W.J. Funding: Funds for the research were provided by the National Oceanographic and Atmospheric Administration, Nutrient Enhanced Coastal Ocean Productivity (NECOP) program. Security_Information: Security_Classification_System: None Security_Classification: Unclassified Security_Handling_Description: None Native_Data_Set_Environment: Windows 2000, MSAccess 2000 Analytical_Tool: Analytical_Tool_Description: Autoanalyzer Tool_Access_Information: Tool_Access_Instructions: Unknown. Tool_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Tom Oswald Contact_Address: Address_Type: mailing address Address: 110 Coastal Studies Coastal Ecology Institute LSU City: Baton Rouge State_or_Province: LA Postal_Code: 70803 Contact_Voice_Telephone: 225 388-6700 Contact_Electronic_Mail_Address: Unknown Analytical_Tool: Analytical_Tool_Description: Fluorometer Tool_Access_Information: Tool_Access_Instructions: Contact Turner Designs. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Turner Designs Inc. Contact_Address: Address_Type: mailing address Address: 845 W. Maude Avenue City: Sunnyvale State_or_Province: CA Postal_Code: 94085 Country: US Contact_Voice_Telephone: 877 316-8049 Analytical_Tool: Analytical_Tool_Description: CTD Tool_Access_Information: Tool_Access_Instructions: Contact HydroLab Corporation Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Hydrolab Corporation Contact_Address: Address_Type: mailing address Address: 8700 Cameron Road City: Austin State_or_Province: TX Postal_Code: 78754 Country: US Contact_Voice_Telephone: 800-949-3766 Contact_Electronic_Mail_Address: techsupport@hydrolab.com Analytical_Tool: Analytical_Tool_Description: Portable salinometer Tool_Access_Information: Tool_Access_Instructions: Contact Guildine Instruments Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Guildline Instruments Contact_Address: Address_Type: mailing address Address: 103 Commerce Street, Suite 160 City: Lake Mary State_or_Province: FL Postal_Code: 32746 Country: US Contact_Voice_Telephone: 800-232-4536 Contact_Electronic_Mail_Address: sales@guildline.com Analytical_Tool: Analytical_Tool_Description: Transmissometer Tool_Access_Information: Tool_Access_Instructions: Sea Tech, Inc. was acquired by Wet Labs, Inc. as of June 1, 1998. Contact Wet Labs, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Wet Labs, Inc. Contact_Address: Address_Type: mailing and physical address Address: 620 Applegate St. City: Philomath State_or_Province: OR Postal_Code: 97370-0518 Country: US Contact_Voice_Telephone: 541 929-5650 Analytical_Tool: Analytical_Tool_Description: Beckman type dissolved oxygen sensor. Tool_Access_Information: Tool_Access_Instructions: Contact Sea-Bird Electronics, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sea-Bird Electronics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 1808 136th Place NE City: Bellevue State_or_Province: WA Postal_Code: 98005 Country: USA Contact_Voice_Telephone: 425 643-9866 Contact_Electronic_Mail_Address: seabird@seabird.com Analytical_Tool: Analytical_Tool_Description: Conductivity sensor. Tool_Access_Information: Tool_Access_Instructions: Contact Sea-Bird Electronics, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sea-Bird Electronics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 1808 136th Place NE City: Bellevue State_or_Province: WA Postal_Code: 98005 Country: USA Contact_Voice_Telephone: 425 643-9866 Contact_Electronic_Mail_Address: seabird@seabird.com Analytical_Tool: Analytical_Tool_Description: CTD Tool_Access_Information: Tool_Access_Instructions: Contact Sea-Bird Electronics, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sea-Bird Electronics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 1808 136th Place NE City: Bellevue State_or_Province: WA Postal_Code: 98005 Country: USA Contact_Voice_Telephone: 425 643-9866 Contact_Electronic_Mail_Address: seabird@seabird.com Analytical_Tool: Analytical_Tool_Description: Temperature sensor. Tool_Access_Information: Tool_Access_Instructions: Contact Sea-Bird Electronics, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sea-Bird Electronics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 1808 136th Place NE City: Bellevue State_or_Province: WA Postal_Code: 98005 Country: USA Contact_Voice_Telephone: 425 643-9866 Contact_Electronic_Mail_Address: seabird@seabird.com Analytical_Tool: Analytical_Tool_Description: Pressure sensor. Tool_Access_Information: Tool_Access_Instructions: Contact Sea-Bird Electronics, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sea-Bird Electronics, Inc. Contact_Address: Address_Type: mailing and physical address Address: 1808 136th Place NE City: Bellevue State_or_Province: WA Postal_Code: 98005 Country: USA Contact_Voice_Telephone: 425 643-9866 Contact_Electronic_Mail_Address: seabird@seabird.com Analytical_Tool: Analytical_Tool_Description: Fluorometer Tool_Access_Information: Tool_Access_Instructions: Sea Tech, Inc. was acquired by Wet Labs, Inc. as of June 1, 1998. Contact Wet Labs, Inc. Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Wet Labs, Inc. Contact_Address: Address_Type: mailing and physical address Address: 620 Applegate St. City: Philomath State_or_Province: OR Postal_Code: 97370-0518 Country: US Contact_Voice_Telephone: 541 929-5650 Analytical_Tool: Analytical_Tool_Description: Digital GPS Tool_Access_Information: Tool_Access_Instructions: Contact Garmin International Tool_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Garmin International Contact_Address: Address_Type: mailing address Address: GARMIN International Inc. 1200 E. 151st Street City: Olathe State_or_Province: KS Postal_Code: 66062 Country: US Contact_Voice_Telephone: 913 397 8200 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: S795Hydrolab: The dissolved oxygen sensor of the Hydrolab Surveyor 3 was pre- and post-calibrated using air saturated water concentrations and barometric pressure from a laboratory grade barometer. Conductivity and pH were pre- and post-calibrated with the appropriate solutions. There were problems with the Hydrolab CTD conductivity throughout the cruise. Most bad values were omitted. There are instances where reported salinity is not consistent with measurements above and below. The values should be used with great caution. S795Nutrient: Nutrient analyses were conducted by Tom Oswald under the supervision of R. E. Turner. S795Pigment: The Turner Designs model 10 fluorometer was calibrated for chlorophyll a against a chemical supply house chlorophyll a standard measured on a spectrophotometer yearly (or more frequently if needed). During the cruise, the Fluorometer was blanked and calibrated daily in accordance with Turner Designs recommended procedures. Chlorophyll concentrations were supervised and quality controlled by Nancy Rabalais. S795Seabird: Sea-Bird factory calibrated conductivity and temperature sensors were maintained and serviced in accordance with Sea-Bird recommended procedures. The Sea Tech fluorometer and transmissometer were maintained and serviced in accordance with Sea Tech recommended procedures. Sea-Bird dissolved oxygen sensor was maintained and serviced in accordance with Sea-Bird recommended procedures. Oxygen concentration determinations, upper and lower end, were made prior to the cruise by the LUMCON CTD technician and entered into the SeaSoft configuration file. Winkler oxygen titrations on board ship were used to develop a regression against Sea-Bird data, which were corrected if necessary. The oxygen data for the NECOP shelfwide summer 1995 hypoxia cruise were corrected by the following regression: revised D.O. = 0.843 (Sea-Bird D.O.) -0.083. If the revised D.O. value became negative, the value was changed to 0.0. This occurred for near-bottom values at stations D2, D1N and D1. There was good agreement of corrected Sea-Bird values with bottom values obtained from the Hydrolab CTD. Data reductions from the SeaBird were generated by Ben Cole and quality controlled by Nancy Rabalais. S795Stns: Depths were logged from the RV Tommy Munro’s fathometer. S795SalSed: Suspended sediment concentrations were supervised and quality controlled by Nancy Rabalais. Salinity determinations were made with a Guildine Portasal maintained by the LSU Coastal Studies shop. N. Rabalais performed an additional procedure in quality-control/quality-assurance by evaluating relationships between the data in S795Hydrolab, S795Nutrient, S795Pigment, S795SalSed, S795Seabird and S795Stns. Logical_Consistency_Report: There are a few negative density sigma-t values in the hydrological data sets. Similar values were acquired by both the Hydrolab and Sea-Bird CTDs at similar station depths at station A'1. Completeness_Report: Unknown. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Station positions were logged from a Garmin 45 DGPS at the beginning of sampling operations. Manufacturer's DGPS accuracy claim is 5-10 meters. Due to the US DOD-imposed Selective Availability Program, position accuracy (normally between 5 and 10 meters), may have been degraded by up to one hundred meters at times. Wind, currents and tidal forces may have moved the ship from the beginning positions. Lineage: Methodology: Methodology_Type: Field Pigment Methodology_Description: Water for chlorophyll analysis (30 - 100 ml) was filtered on board ship through GF/F (0.7 micron) filters, which are then fixed in 5 ml of DMSO/90% acetone (40/60) solution, allowed to extract for at least one hour in the dark, then measured pre- and post-acidification on a Turner Model 10 fluorometer. Methodology: Methodology_Type: Field Station Locations Methodology_Description: Field station locations: Stations were occupied along 14 generally North-South transects across the Louisiana coastal shelf. Station depths ranged from 5.3 to 53 meters. The objective was to delimit and describe the area of midsummer bottom dissolved oxygen less than 2 (mg/L). Due to limitations of equipment, time and funding, this was not always possible. Northern end stations of transects were chosen based on the survey vessel's minimum depth limits for each longitude. The Northern extent of hypoxia was not reached on seven transects. Optimally, one or two stations South of the Southern most station with bottom dissolved oxygen less than 2 (mg/L) were sampled. The limit of hypoxia on the Southern end of transect K was not reached. Methodology: Methodology_Type: Field Nutrient Methodology_Description: Care was taken that the collector's hands were clean and avoided touching the water. Gloves were worn when three replicate sample vials and caps were triple rinsed with sample before vial filling and closing. Samples were not filtered. The sample vials were frozen for later analysis in the laboratory. Methodology: Methodology_Type: Lab Nutrient Methodology_Description: Nitrogen and phosphorus were analyzed according to methods described in EPA publication EPA 600/4-79-020 (1979), method 350.1 for ammonia-N, method 353.2 for nitrate/nitrite-N, and method 365.1 for phosphate-P. Silicate was analyzed according to Technicon Industrial method 186-72 W/B (1977). Methodology: Methodology_Type: Lab CTD Methodology_Description: CTD data were post processed using Seasoft version 4.212. All scans were processed without averaging or interpolation with a bin size of one scan. In order to improve alignment between oxygen sensor values and other CTD sensor values, the Seasoft module ALIGNCTD was used to determine which advance best compensated for the delay in oxygen sensor response time. When Seabird data were processed, dissolved oxygen was advanced relative to temperature and conductivity values: + 3.467 seconds. Data values reported are from downcasts. Downcast scans selected for each CTD station are chosen to illustrate: 1) data values as near to the surface as possible, 2) data values at whole meter increments, and 3) data values as close to the bottom as the CTD was lowered. In certain cases where data values of a parameter changed significantly between whole meter increments, 0.1- or 0.2-meter scans were selected. Methodology: Methodology_Type: Field Suspended Sediment Methodology_Description: Water (approximately 300 to 500 ml) was filtered on board ship through pre-weighed GF/F filters, rinsed with distilled water. The filters were placed in Petri dishes and frozen for later analysis. Methodology: Methodology_Type: Lab Suspended Sediment Methodology_Description: Suspended sediment filters were dried 24 hours at 40 - 60 degrees centigrade for 24 hours. Filters were weighed. Total suspended sediments was derived from volume filtered, pre-weight and post weight values. Methodology: Methodology_Type: Field water samples Methodology_Description: Water for chlorophyll, nutrient analyses, Portasal salinity and suspended sediments was collected from the surface by twice-rinsed bucket, from mid-water in 5-l Niskin bottles on the Seabird CTD/rosette system and from bottom in a 5-l bottom tripping Niskin bottle secured in a frame with the Hydrolab Surveyor 3. Depth values of 0 indicate a bucket sample collected from the surface of the water. Deepest depths of water samples were from the bottom-tripping Niskin and correspond to the deepest depth recorded from the Hydrolab. Other depths indicate the p-sensor reading for 5-l Niskin bottles on the Seabird rosette. The Seabird p-sensor was located approx. 1 meter below the mid-point of the 5-l Niskin. Bottom 5-l Niskins on the rosette were used to collect “bottom” water samples at stations A7, A6, B1, B2, B6, B8, C7, C6B, C4, D1, E2, E2A and F3. Methodology: Methodology_Type: Field Hydrolab Methodology_Description: Hydrolab data were obtained for the lowest 2 m of the water column, the upper 1 m of the water column, and as close to the surface as possible. Methodology: Methodology_Type: Field CTD Methodology_Description: At the beginning of each hydrocast the entire CTD/Rosette package was soaked while submerged 0.5m to 1.0m below the surface until pump flow and oxygen values observed via the Sea-Bird deck unit indicated the system was operating correctly. In order to minimize the effect of delays in oxygen sensor response time caused by temperature, sensor condition and plumbing configuration, the CTD package was lowered as close to dead slow as possible. The sensor packages were located below the Niskin bottles and rosette. At stations where the watch chief deemed the structure of the oxygen profile contains features useful in post-processing the oxygen data (AlignCTD), the CTD package was raised at the same speed it was lowered. At all other stations, the upcast is rapid in order to save time. Process_Step: Process_Description: Unknown. Process_Date: Unknown Cloud_Cover: Unknown Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 78 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: Degrees and decimal minutes Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: S795Seabird Entity_Type_Definition: The table lists values for SeaBird CTD station conductivity, density sigma-t, fluorometer voltage, dissolved oxygen, percent oxygen saturation, salinity, percent light transmission and temperature values at depths. There are 2076 records. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Cond Attribute_Definition: Conductivity Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.283318 Range_Domain_Maximum: 5.921485 Attribute_Units_of_Measure: S/m Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Density Attribute_Definition: Density sigma-t Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -3.1383 Range_Domain_Maximum: 26.9532 Attribute_Units_of_Measure: Density sigma-t Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Depth Attribute_Definition: Depth of SeaBird pressure sensor Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.504 Range_Domain_Maximum: 52.002 Attribute_Units_of_Measure: Meters Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Fluor Attribute_Definition: Fluorometer voltage Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field, generally numeric equivalent of text value except in 15 cases where ">10.0" indicates fluorometer was maximized. Range_Domain: Range_Domain_Minimum: 1.5 Range_Domain_Maximum: 9.76 Attribute_Units_of_Measure: volts Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: O2 Attribute_Definition: Dissolved oxygen (revised). See SeaBird dissolved oxygen in Data Quality section of this metadata record. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 9.531634 Attribute_Units_of_Measure: mg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: PctO2Sat Attribute_Definition: Oxygen percent saturation Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.1 Range_Domain_Maximum: 162 Attribute_Units_of_Measure: Percent Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sal Attribute_Definition: Salinity Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.3414 Range_Domain_Maximum: 37.6675 Attribute_Units_of_Measure: ppt Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Station name of location sampled Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2068 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: Number Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Temp Attribute_Definition: Temperature Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.8519 Range_Domain_Maximum: 29.9035 Attribute_Units_of_Measure: Degrees centigrade Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Xmiss Attribute_Definition: Percent light transmission Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 73.6 Attribute_Units_of_Measure: Percent Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Detailed_Description: Entity_Type: Entity_Type_Label: S795Nutrient Entity_Type_Definition: The table lists values for station NH4, NO2, NO2+NO3, NO3, PO4 and SiO3 values at depths. There are 153 records. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Depth Attribute_Definition: 0 = bucket surface sample. Deepest depths of samples were from bottom tripping Niskin and correspond to the deepest depth recorded from the Hydrolab CTD pressures sensor. Other depths indicate the pressure sensor reading for 5 liter Niskin on the Sea-Bird CTD/rosette. The Sea-Bird pressure sensor was located 1 meter below mid point of Niskin bottles on the rosette. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 51.9 Attribute_Units_of_Measure: Meters Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: NH4 Attribute_Definition: Ammonium Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 74.3 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: NO2 Attribute_Definition: Nitrite Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 4.1 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: NO2+NO3 Attribute_Definition: Nitrite+Nitrate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.2 Range_Domain_Maximum: 95.2 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: NO3 Attribute_Definition: Nitrate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 94.9 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: PO4 Attribute_Definition: Phosphate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 3.4 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: SiO3 Attribute_Definition: Silicate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.7 Range_Domain_Maximum: 120.3 Attribute_Units_of_Measure: µg-at/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Station name of location sampled Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2065 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: Integer Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Detailed_Description: Entity_Type: Entity_Type_Label: S795Pigment Entity_Type_Definition: The table lists values for station mean chlorophyll a, Fo/Fa ratio, mean phaeopigment and total pigment values at depths. There are 155 records. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Depth Attribute_Definition: 0 = bucket surface sample. Deepest depths of samples were from bottom tripping Niskin and correspond to the deepest depth recorded from the Hydrolab CTD pressures sensor. Other depths indicate the pressure sensor reading for 5 liter Niskin on the Sea-Bird CTD/rosette. The Sea-Bird pressure sensor was located 1 meter below mid point of Niskin bottles on the rosette. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 51.9 Attribute_Units_of_Measure: meter Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: MeanC Attribute_Definition: Mean Chlorophyll a Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.28 Range_Domain_Maximum: 80.82 Attribute_Units_of_Measure: µg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: MeanF Attribute_Definition: Mean Fo/Fa ratio Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.18 Range_Domain_Maximum: 2.09 Attribute_Units_of_Measure: FoFa ratio Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: MeanP Attribute_Definition: Mean Phaeopigments Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 45.06 Attribute_Units_of_Measure: µg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Station name of location sampled Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2065 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: Integer Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Total Attribute_Definition: Total pigments Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.41 Range_Domain_Maximum: 80.82 Attribute_Units_of_Measure: µg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Detailed_Description: Entity_Type: Entity_Type_Label: S795Stns Entity_Type_Definition: The table lists values for station, date, fathometer, latitude, longitude, Secchi disk, time of Hydrolab and Seabird casts and station ID. There are 79 records. Station A7 has two stnID numbers because the date changed between the times of the Sea-Bird and Hydrolab CTD casts. The times stations R1, R2 and R3 were occupied are listed in the TimeHL field. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Date Attribute_Definition: Date station was sampled. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 19950721 Range_Domain_Maximum: 19950726 Attribute_Units_of_Measure: YYYYMMDD Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Fath Attribute_Definition: Estimated total depth of station from ship's fathometer, with addition of constant distance from the transducer to the sea surface. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.3 Range_Domain_Maximum: 53 Attribute_Units_of_Measure: meter Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude of sampling station. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28.392 Range_Domain_Maximum: 29.7073 Attribute_Units_of_Measure: Decimal degrees Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: -9999 Attribute_Value_Accuracy_Explanation: Latitude value was recorded from a digital GPS at the beginning of sampling operations. US DOD Selective Availability may have degraded accuracy at times. Wind, currents and tidal forces can move the ship from the beginning position. Survey vessel was not anchored during sampling. Position at end of sample operations may have changed from beginning operations location. Vessel drift was generally less than 0.3 nm. An Accuracy value of -9999 was entered because accuracy could not be determined. Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude of sampling station. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -93.6037 Range_Domain_Maximum: -89.4283 Attribute_Units_of_Measure: Decimal degrees Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: -9999 Attribute_Value_Accuracy_Explanation: Longitude value was recorded from a digital GPS at the beginning of sampling operations. US DOD Selective Availability may have degraded accuracy at times. Wind, currents and tidal forces can move the ship from the beginning position. Survey vessel was not anchored during sampling. Position at end of sample operations may have changed from beginning operations location. Vessel drift was generally less than 0.3 nm. An Accuracy value of -9999 was entered because accuracy could not be determined. Attribute: Attribute_Label: Secchi Attribute_Definition: Secchi disk depth. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.7 Range_Domain_Maximum: 12 Attribute_Units_of_Measure: meter Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Station name of location sampled. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Unrepresentable_Domain: Character field Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2065 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: number Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: TimeHL Attribute_Definition: Time (Central Daylight) of beginning of HydroLab cast. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0:03:53 Range_Domain_Maximum: 23:44:46 Attribute_Units_of_Measure: HH:mm:ss Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: TimeSB Attribute_Definition: Time (Central Daylight) at beginning of Sea-Bird CTD cast. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0:05 Range_Domain_Maximum: 23:45 Attribute_Units_of_Measure: HH:mm Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Detailed_Description: Entity_Type: Entity_Type_Label: S795SalSed Entity_Type_Definition: The table lists values for station, depth, suspended sediments and station ID. There are 78 records. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Depth Attribute_Definition: 0 = bucket surface sample. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0 Attribute_Units_of_Measure: meters Unrepresentable_Domain: Character field. Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: PortaSal Attribute_Definition: Salinity Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.47 Range_Domain_Maximum: 33.982 Attribute_Units_of_Measure: ppt Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Station name of location sampled. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Unrepresentable_Domain: Character field. Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2065 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: Integer Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: SuspSed Attribute_Definition: Total suspended sediments Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 35.67 Attribute_Units_of_Measure: mg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Detailed_Description: Entity_Type: Entity_Type_Label: S795Hydrolab Entity_Type_Definition: The table lists values for Hydrolab CTD station specific conductance, density sigma-t, pH, dissolved oxygen, percent oxygen saturation, salinity and temperature values at depths. There are 626 records. Entity_Type_Definition_Source: None. Attribute: Attribute_Label: Density Attribute_Definition: Density sigma-t Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -3.37 Range_Domain_Maximum: 26.22 Attribute_Units_of_Measure: Density sigma-t Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Depth Attribute_Definition: Depth of Hydrolab pressure sensor. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 51.9 Attribute_Units_of_Measure: meters Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: O2 Attribute_Definition: Dissolved Oxygen Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.05 Range_Domain_Maximum: 12 Attribute_Units_of_Measure: mg/L Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: PctO2Sat Attribute_Definition: Percent oxygen saturation Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.7 Range_Domain_Maximum: 178.4 Attribute_Units_of_Measure: percentage Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: pH Attribute_Definition: pH Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.6 Range_Domain_Maximum: 8.82 Attribute_Units_of_Measure: pH units Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sal Attribute_Definition: Salinity Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.6 Range_Domain_Maximum: 37.5 Attribute_Units_of_Measure: ppt Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: spCond Attribute_Definition: Specific Conductance. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.9 Range_Domain_Maximum: 56.4 Attribute_Units_of_Measure: mS/cm Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Sta Attribute_Definition: Name of station sampled. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Unrepresentable_Domain: Character field. Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: StnID Attribute_Definition: Station identification number. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2068 Range_Domain_Maximum: 2142 Attribute_Units_of_Measure: Integer Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Attribute: Attribute_Label: Temp Attribute_Definition: Temperature. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.32 Range_Domain_Maximum: 31.56 Attribute_Units_of_Measure: Degrees Centigrade. Beginning_Date_of_Attribute_Values: 19950721 Ending_Date_of_Attribute_Values: 19950726 Overview_Description: Entity_and_Attribute_Overview: The related data tables S795Hydrolab, S795Nutrient, S795Pigment, S795SalSed, S795Seabird and S795Stns contain spatial, temporal, physical and biological water quality data acquired during the July 1995 cruise. Each table contains a StnID field that can be used to key joins with the other tables. Entity_and_Attribute_Detail_Citation: For detailed attribute information contact Nancy Rabalais. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Nancy N. Rabalais Contact_Organization: Louisiana Universities Marine Consortium Contact_Address: Address_Type: mailing address Address: Louisiana Universities Marine Consortium 8124 Hwy 56 City: Chauvin State_or_Province: LA Postal_Code: 70344 Country: USA Contact_Voice_Telephone: 985 851 2800 Contact_Facsimile_Telephone: 985 851 2874 Contact_Electronic_Mail_Address: Unknown Distribution_Liability: I, the data requestor, agree to credit the data originators in any publications, reports or presentations generated from this data. I also accept that although these data have been processed successfully on a computer system at the Louisiana Universities Marine Consortium, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. I recognize that these data are best acquired from the originator and not from a secondary source. I recognize that careful attention must be paid to the contents of the metadata file associated with these data. I will not hold Louisiana Universities Marine Consortium liable for improper or incorrect use of the data described and/or contained herein. This disclaimer applies both to individual use of the data and aggregate use with other data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: MDB Format_Version_Number: 9 File_Decompression_Technique: File compression not used. Transfer_Size: 0.716 Digital_Transfer_Option: Offline_Option: Offline_Media: 3-1/2 inch floppy disk Recording_Format: DOS Copy Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: S795.mdb Access_Instructions: Contact Distributor. Fees: None Ordering_Instructions: Call, email or write the Distributor with requests for data sets. Standard_Order_Process: Fees: None. Custom_Order_Process: Contact distributor Metadata_Reference_Information: Metadata_Date: 20020603 Metadata_Review_Date: 20020702 Metadata_Future_Review_Date: 20120615 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Ben Cole Contact_Organization: Louisiana Universities Marine Consortium Contact_Address: Address_Type: mailing address Address: LUMCON 8124 Hwy 24 City: Chauvin State_or_Province: LA Postal_Code: 70344 Country: USA Contact_Voice_Telephone: 985 851 2800 Contact_Facsimile_Telephone: 985 851 2874 Contact_Electronic_Mail_Address: Unknown Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time