Louisiana Coastal Hypoxia Shelfwide Survey, July 1992

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Rabalais, N.
Publication_Date: Unknown
Title: Louisiana Coastal Hypoxia Shelfwide Survey, July 1992
Geospatial_Data_Presentation_Form: Database
Description:
Abstract:
Hydrographic data were collected during a July 24 - 29, 1992 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: 19920724
Beginning_Time: Unknown
Ending_Date: 19920729
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: -93.43
East_Bounding_Coordinate: -89.47
North_Bounding_Coordinate: 29.52
South_Bounding_Coordinate: 28.39
Data_Set_G-Polygon:
Data_Set_G-Polygon_Outer_G-Ring:
G-Ring_Point:
G-Ring_Latitude: 29.52
G-Ring_Longitude: -93.43
G-Ring_Point:
G-Ring_Latitude: 28.39
G-Ring_Longitude: -89.47
G-Ring_Point:
G-Ring_Latitude: 28.39
G-Ring_Longitude: -93.43
G-Ring_Point:
G-Ring_Latitude: 29.52
G-Ring_Longitude: -89.47
G-Ring_Point:
G-Ring_Latitude: 29.52
G-Ring_Longitude: -93.43
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 > Hydrosphere > Water Quality > Suspended Solids
Theme_Keyword:
EARTH SCIENCE > Hydrosphere > Water Quality > Water Temperature
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
Theme_Keyword: EARTH SCIENCE > Oceans > Water Quality
Theme:
Theme_Keyword_Thesaurus: GCMD NASA's Global Change Master Dir. THEME
Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Ammonia > Ammonium
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: 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:
A navigation device that uses a radio navigation system operated by the U.S. Coast Guard.
Tool_Access_Information:
Tool_Access_Instructions: Contact Northstar Technologies Inc.
Tool_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Northstar Technologies Inc.
Contact_Address:
Address_Type: mailing address
Address: Northstar Technologies
City: Acton
State_or_Province: Mass.
Postal_Code: 01720
Contact_Voice_Telephone: 978-897-6600
Contact_Electronic_Mail_Address: service@northstarcmc.co
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: Fathometer
Tool_Access_Information:
Tool_Access_Instructions: Japan Radio Co. Ltd.
Tool_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Japan Radio Co. Ltd.
Contact_Address:
Address_Type: mailing address
Address:
Akasaka Twin Tower (Main), 17-22, Akasaka 2-chome,
Minato-ku,
City: TOKYO
State_or_Province: Unknown
Postal_Code: Unknown
Country: JAPAN
Contact_Voice_Telephone: 81-3-3584-8836
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
S792Hydrolab: Temperature, dissolved oxygen, percent oxygen saturation, conductivity, salinity, density, and depth data were acquired with a Hydrolab Surveyor3 CTD. Dissolved oxygen values for the Hydrolab Surveyor 3 were pre- and post-calibrated by air saturated water concentrations and barometric pressure from a laboratory grade barometer. Salinity and pH were pre- and post-calibrated with the appropriate solutions.

S792Nutrient: Nutrient analyses were conducted by Tom Oswald under the supervision of R. E. Turner

S792Pigment: 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.

S792Seabird: Temperature, dissolved oxygen, percent oxygen saturation, conductivity, salinity, density, percent light transmission, fluorescence and depth were acquired with a SeaBird 911 CTD system that was used to obtain water column profiles at all stations.

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 were conducted during the cruise. A regression equation developed from Winkler titrations gave a strong, good relationship. A correction of the SeaBird oxygen data was not necessary.

Due to a delay in response time of the oxygen sensor, oxygen data were not aligned well with conductivity and temperature depths in this dataset. Downcast dissolved oxygen values probably related better to other parameters in 1 meter above the oxygen probe. Bottom dissolved oxygen values were equilibrated.

Oxygen data were omitted from the top of casts if concentrations indicated that the CTD oxygen probe was not equilibrated due to inadequate ""soak"" time or too fast a lowering speed. Oxygen data were removed from one or more depths at 6 of the 71 the stations sampled. Dissolved oxygen and percent oxygen saturation values were negative for two depths at Station A3.

Data reductions from the SeaBird were generated by Ben Cole and quality controlled by Nancy Rabalais.

S792Stns: Position coordinates were logged from RV Pelican’s Loran C. Station depths were logged from the ship’s fathometer.

S792SuspSed: Suspended sediment concentrations were supervised and quality controlled by Nancy Rabalais

N. Rabalais performed an additional procedure in quality-control/quality-assurance by evaluating relationships between the data in S792Hydrolab, S792Nutrient, S792Pigment, S792Seabird and S792Stns.

Logical_Consistency_Report: Unknown
Completeness_Report: Unknown.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Station positions were logged from RV Pelican's NorthStar LORAN C at the beginning of sampling operations. Manufacturer's accuracy claim is 30 meters 90% of the time. Wind, currents and tidal forces may have moved the ships from the beginning positions.
Lineage:
Methodology:
Methodology_Type: Field Pigment
Methodology_Description:
Water for chlorophyll analysis (50 - 100 ml) is 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:
Stations were occupied along 14 generally North-South transects across the Louisiana coastal shelf and into Texas waters.. Station depths ranged from 6 to 52 meters. The objective was to delimit and describe the area of midsummer bottom dissolved oxygen less than 2 (mg/L). 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 five 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 A was not reached. Station C6B was sampled twice.
Methodology:
Methodology_Type: Field Nutrient
Methodology_Description:
Care was taken that the collector's hands were clean and avoided touching the water. 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 3.4H. All scans were processed without averaging or interpolation with a bin size of one scan. 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-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, and suspended sediments were collected from the surface by bucket, from mid-water in 5-l Niskin bottles on the Seabird CTD/rosette system, and from bottom in a 30-l bottom tripping Niskin bottle secured in a frame with the Hydrolab Surveyor 3. Depth of 0.00 or "bucket" indicates 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 rosette. p-sensor was located approx. 1 meter below the mid-point of the 5-l Niskin. Pigment sample depth values = "midas" indicate samples were collected from RV Pelican’s seawater flow-through system. The seawater intake was located in the sea chest approximately 3 meters below the surface. Bottom water sample at station H6 was collected with CTD Niskin Bottle.
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. Hydrolab data were omitted from the top of the cast, if the salinity values indicated that the probes were out of the water.
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: 71
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: S792Seabird
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 1845 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: 3.05408
Range_Domain_Maximum: 5.63284
Attribute_Units_of_Measure: S/m
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Density
Attribute_Definition: Density sigma-t
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 8.6657
Range_Domain_Maximum: 25.7069
Attribute_Units_of_Measure: Density sigma-t
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Depth
Attribute_Definition: Depth of SeaBird pressure sensor
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.066
Range_Domain_Maximum: 51.45
Attribute_Units_of_Measure: Meters
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 0.4844
Range_Domain_Maximum: 3.332
Attribute_Units_of_Measure: volts
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: O2
Attribute_Definition: Dissolved oxygen
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.61
Range_Domain_Maximum: 10.153
Attribute_Units_of_Measure: mg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: PctO2Sat
Attribute_Definition: Oxygen percent saturation
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -8.8
Range_Domain_Maximum: 151.3
Attribute_Units_of_Measure: Percent
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: PctXmiss
Attribute_Definition: Percent light transmission
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 47.2
Range_Domain_Maximum: 94.4
Attribute_Units_of_Measure: Percent
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Sal
Attribute_Definition: Salinity
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 17.2465
Range_Domain_Maximum: 37.2333
Attribute_Units_of_Measure: ppt
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1303
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Temp
Attribute_Definition: Temperature
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.1902
Range_Domain_Maximum: 31.0083
Attribute_Units_of_Measure: Degrees centigrade
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Detailed_Description:
Entity_Type:
Entity_Type_Label: S792Nutrient
Entity_Type_Definition:
The table lists values for station NH4, NO2, NO2+NO3, NO3, PO4 and SiO3 values at depths. There are 178 records.
Entity_Type_Definition_Source: None.
Attribute:
Attribute_Label: Depth
Attribute_Definition:
0.0 = bucket surface sample. Depth of SeaBird p sensor for mid-water samples. Depth of Hydrolab p-sensor for bottom samples.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0
Range_Domain_Maximum: 52.6
Attribute_Units_of_Measure: Meters
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: NH4
Attribute_Definition: Ammonium
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 10.4
Attribute_Units_of_Measure: µg-at/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: NO2+NO3
Attribute_Definition: Nitrite+Nitrate
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 12.7
Attribute_Units_of_Measure: µg-at/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: NO3
Attribute_Definition: Nitrate
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 12.4
Attribute_Units_of_Measure: µg-at/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 2.9
Attribute_Units_of_Measure: µg-at/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: SiO3
Attribute_Definition: Silicate
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.5
Range_Domain_Maximum: 62.7
Attribute_Units_of_Measure: µg-at/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1303
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Detailed_Description:
Entity_Type:
Entity_Type_Label: S792Pigment
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 217 records.
Entity_Type_Definition_Source: None.
Attribute:
Attribute_Label: Depth
Attribute_Definition:
0 = bucket surface sample. Mid-water = depth of SeaBird p-sensor in meters. Bottom water = depth of Hydrolab p-sensor in meters. Midas = approximately 3 meters.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Unrepresentable_Domain: Character field.
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: MeanC
Attribute_Definition: Mean Chlorophyll a
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 31.46
Attribute_Units_of_Measure: µg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: MeanF
Attribute_Definition: Mean Fo/Fa ratio
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.58
Range_Domain_Maximum: 5.92
Attribute_Units_of_Measure: FoFa ratio
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 70.36
Attribute_Units_of_Measure: µg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1303
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Total
Attribute_Definition: Total pigments
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.33
Range_Domain_Maximum: 70.36
Attribute_Units_of_Measure: µg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Detailed_Description:
Entity_Type:
Entity_Type_Label: S792Stns
Entity_Type_Definition:
The table lists values for station, date, fathometer, latitude, longitude, Secchi disk, time of Seabird cast, time of Hydrolab cast and station ID. There are 71 records.
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: 19920724
Range_Domain_Maximum: 19920729
Attribute_Units_of_Measure: YYYYMMDD
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Fath
Attribute_Definition:
Estimated total depth of station from ship's fathometer, with addition of constant hull depth.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6
Range_Domain_Maximum: 52
Attribute_Units_of_Measure: meters
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Latitude
Attribute_Definition: Latitude of sampling station.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 28.3913
Range_Domain_Maximum: 29.5116
Attribute_Units_of_Measure: Decimal degrees
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: -9999
Attribute_Value_Accuracy_Explanation:
Latitude value was recorded from the ship's LORAN C at the beginning of sampling operations. Manufacturer's accuracy claim is 30 meters 90% of the time. Wind, currents and tidal forces may 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: -93.422
Range_Domain_Maximum: -89.4748
Attribute_Units_of_Measure: Decimal degrees
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: -9999
Attribute_Value_Accuracy_Explanation:
Latitude value was recorded from the ship's LORAN C at the beginning of sampling operations. Manufacturer's accuracy claim is 30 meters 90% of the time. Wind, currents and tidal forces may 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: 1
Range_Domain_Maximum: 14
Attribute_Units_of_Measure: meters
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1303
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: TimeHL
Attribute_Definition: Time of beginning of HydroLab CTD cast.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1:01
Range_Domain_Maximum: 23:27
Attribute_Units_of_Measure: HH:mm
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: TimeSB
Attribute_Definition: Time of beginning of SeaBird CTD cast.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0:40
Range_Domain_Maximum: 23:15
Attribute_Units_of_Measure: HH:mm
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Detailed_Description:
Entity_Type:
Entity_Type_Label: S792SuspSed
Entity_Type_Definition:
The table lists values for station, depth, suspended sediments and station ID. There are 90 records.
Entity_Type_Definition_Source: None.
Attribute:
Attribute_Label: Depth
Attribute_Definition:
0 = bucket surface sample. Mid-water = depth of SeaBird p-sensor in meters. Bottom water = depth of Hydrolab p-sensor in meters. M = approximately 3 meters.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 29.34
Attribute_Units_of_Measure: meters
Unrepresentable_Domain: Character field.
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920728
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: 19920724
Ending_Date_of_Attribute_Values: 19920728
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1296
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920728
Attribute:
Attribute_Label: SuspSed
Attribute_Definition: Total suspended sediments
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.2
Range_Domain_Maximum: 300
Attribute_Units_of_Measure: mg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920728
Detailed_Description:
Entity_Type:
Entity_Type_Label: S792Hydrolab
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 489 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: 8.18
Range_Domain_Maximum: 25.8
Attribute_Units_of_Measure: Density sigma-t
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Depth
Attribute_Definition: Depth of Hydrolab pressure sensor.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.3
Range_Domain_Maximum: 52.6
Attribute_Units_of_Measure: meters
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: O2
Attribute_Definition: Dissolved Oxygen
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.02
Range_Domain_Maximum: 9.68
Attribute_Units_of_Measure: mg/L
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: PctO2Sat
Attribute_Definition: Percent oxygen saturation
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 143.1
Attribute_Units_of_Measure: percentage
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: pH
Attribute_Definition: pH
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7.54
Range_Domain_Maximum: 8.62
Attribute_Units_of_Measure: pH units
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Sal
Attribute_Definition: Salinity
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 16.5
Range_Domain_Maximum: 36.9
Attribute_Units_of_Measure: ppt
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: spCond
Attribute_Definition: Specific Conductance.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 26.9
Range_Domain_Maximum: 55.5
Attribute_Units_of_Measure: mS/cm
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
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: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: StnID
Attribute_Definition: Station identification number.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1233
Range_Domain_Maximum: 1303
Attribute_Units_of_Measure: Integer
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Attribute:
Attribute_Label: Temp
Attribute_Definition: Temperature.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.44
Range_Domain_Maximum: 31.39
Attribute_Units_of_Measure: Degrees Centigrade.
Beginning_Date_of_Attribute_Values: 19920724
Ending_Date_of_Attribute_Values: 19920729
Overview_Description:
Entity_and_Attribute_Overview:
The related data tables S792Hydrolab, S792Nutrient, S792Pigment, S792Seabird. S792Stns and S792SuspSed contain spatial, temporal, physical and biological water quality data acquired during the July 1992 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: 0.608
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: S792.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: 20020520
Metadata_Review_Date: 20020701
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
Generated by mp version 2.6.2 on Mon Sep 09 15:38:37 2002
Created using the Automated Cast-net Metadata Entry Tool