Louisiana Hypoxia Surveys 1998-2023: Physical (Hydrography), chemical (CTD), and biological (Water Quality) processes of the Texas-Louisiana continental shelf

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 27, 2026 | Last Modified: 2025-12-12T00:00:00.000+00:00

CTD data were taken during surveys of the Louisiana continental shelf during yearly Shelfwide Hypoxia cruises. Hydrographic data were obtained using CTD. Nutrient, pigment, suspended sediment, surface salinity, Secchi depth, and station information data were also acquired.

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@type	dcat:Dataset
accessLevel	non-public
contactPoint	{ "fn": "NOAA National Centers for Environmental Information", "@type": "vcard:Contact", "hasEmail": "mailto:ncei.info@noaa.gov" }
describedByType	application/octet-steam
description	CTD data were taken during surveys of the Louisiana continental shelf during yearly Shelfwide Hypoxia cruises. Hydrographic data were obtained using CTD. Nutrient, pigment, suspended sediment, surface salinity, Secchi depth, and station information data were also acquired.
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identifier	gov.noaa.nodc:LUMCON-NGI-LA-Hypoxia-Survey
issued	1998-01-01T00:00:00.000+00:00
keyword	[ "0002033", "0020956", "0032050", "0039733", "0049435", "0060060", "0069471", "0099531", "0117436", "0129417", "0161219", "0162101", "0162440", "0164298", "0205844", "0205845", "0208325", "0219157", "0244848", "0294428", "0294429", "0302758", "9800129", "AMMONIA (NH3)", "AMMONIUM (NH4)", "biological data", "CARBON", "CHLOROPHYLL", "CHLOROPHYLL - EXTRACTED", "CHLOROPHYLL - RELATIVE FLUORESCENCE", "CHLOROPHYLL A", "CHLOROPHYLL A CONCENTRATION", "Chromophoric Dissolved Organic Matter (CDOM)", "CONDUCTIVITY", "CORE - BOTTOM", "DEPTH - BOTTOM", "DEPTH - OBSERVATION", "DEPTH - SENSOR", "DISSOLVED OXYGEN", "FLUORESCENCE", "hypoxia", "irradiance", "JULIAN YEAR - DAY", "LATITUDE", "LIGHT PENETRATION", "LIGHT TRANSMISSION", "LONGITUDE", "NITRATE", "nitrate + nitrite content (concentration)", "NITRITE", "NITROGEN - ORGANIC", "NUTRIENTS", "OXYGEN", "OXYGEN - PERCENT SATURATION", "partial pressure of carbon dioxide - water", "pH", "PHAEOPHYTIN", "PHAEOPIGMENT CONCENTRATION", "PHAEOPIGMENTS", "phosphate", "PHOTOSYNTHETIC ACTIVE RADIATION (PAR)", "PHYTOPLANKTON", "PIGMENTS", "SALINITY", "SALINITY - BOTTOM WATER", "SALINITY - SURFACE WATER", "Secchi depth", "SEDIMENT - GRAIN SIZE", "SEDIMENTS", "SIGMA-T", "SIGMA-THETA", "silicate", "Silicon", "SPECIES IDENTIFICATION - ORGANISM LENGTH", "SPECIES IDENTIFICATION - SEX", "suspended solids", "TRACE METALS", "TRANSMISSIVITY", "turbidity", "UREA", "WATER DENSITY", "water depth", "WATER TEMPERATURE", "ZOOPLANKTON", "bottle", "bucket", "conductivity sensor", "CTD", "CTD - moored CTD", "echo sounder", "flow injection analyzer", "fluorometer", "GPS", "laboratory analysis", "multi-parameter water quality sensor", "nutrient autoanalyzer", "oxygen sensor", "PAR Sensor", "pH sensor", "pressure sensor", "refractometer", "salinometer", "Secchi disk", "sediment sampler - corer", "spectrophotometer", "temperature sensor", "thermosalinograph", "titrator", "transmissometer", "trap - plankton", "biological", "chemical", "in situ", "laboratory analyses", "physical", "plankton", "profile", "sediment analysis", "surface measurements", "survey", "water chemistry", "GYRE", "LONGHORN", "NOAA Ship Chapman", "NOAA Ship Malcolm Baldrige", "NOAA Ship Researcher", "R/V Acadiana", "R/V Pelican", "Tommy Munro", "Florida Institute of Technology", "Louisiana State University", "Louisiana Universities Marine Consortium", "NOAA Atlantic Oceanographic and Meteorological Laboratory", "NOAA Great Lakes Environmental Research Laboratory", "Texas A&M University", "The University of Southern Mississippi", "The University of Texas at Austin", "University of Maryland, College Park", "University of Miami Rosenstiel School of Marine and Atmospheric Science", "University of Michigan", "University of Minnesota Twin Cities", "Louisiana Universities Marine Consortium", "Gulf of Mexico Ecosystems and Hypoxia Assessment (NGOMEX)", "Hypoxia Studies in the Northern Gulf of Mexico", "NUTRIENT ENHANCED COASTAL OCEAN PRODUCTIVITY (NECOP)", "Coastal Waters of Gulf of America", "Coastal Waters of Gulf of Mexico", "Coastal Waters of Louisiana", "Coastal Waters of Texas", "Gulf of Mexico", "Mississippi River", "North Atlantic Ocean", "oceanography", "DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce", "DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce", "DOC/NOAA/OAR/GLERL > Great Lakes Environmental Research Laboratory, OAR, NOAA, U.S. Department of Commerce", "U-MIAMI/RSMAS > Rosenstiel School of Marine and Atmospheric Science, University of Miami", "Hypoxia National Office Technical Assistance, Observation and Monitoring, and Coordination Support Activities, Mississippi State University, NA16OAR432019", "Hypoxia National Office Technical Assistance, Observation and Monitoring, and Coordination Support Activities, Mississippi State University, NA16OAR4320199", "DISSOLVED OXYGEN", "Inorganic suspended particulate matter", "Mean Fo/Fa", "SONAR ALTIMETER", "SURFACE PHOTOSYNTHETIC ACTIVE RADIATION (PAR)", "Time", "Total Suspended Sediments", "organic suspended particulate material", "pH mV", "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION", "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON > PHYTOPLANKTON", "EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES", "EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING", "EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > OXYGEN DEMAND", "EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION", "EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON", "EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > SURFACE SALINITY", "EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION > EUTROPHICATION", "EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH", "EARTH SCIENCE > OCEANS > MARINE SEDIMENTS", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > HYPOXIA", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITROGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC MATTER", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SUSPENDED SOLIDS", "EARTH SCIENCE > OCEANS > OCEAN OPTICS", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > ATTENUATION/TRANSMISSION", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > FLUORESCENCE", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > IRRADIANCE", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > PHOTOSYNTHETICALLY ACTIVE RADIATION", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > SECCHI DEPTH", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > TURBIDITY", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY", "EARTH SCIENCE > Oceans > Coastal Processes", "EARTH SCIENCE > Oceans > Marine Environment Monitoring", "EARTH SCIENCE > Oceans > Ocean Chemistry > Biogeochemical Cycles", "EARTH SCIENCE > Oceans > Ocean Circulation > Fronts", "EARTH SCIENCE > Oceans > Ocean Temperature", "EARTH SCIENCE > Oceans > Salinity/Density", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > GASES > DISSOLVED OXYGEN", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > NUTRIENTS", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > SOLIDS > SUSPENDED SOLIDS", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > CHLOROPHYLL CONCENTRATIONS", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > CONDUCTIVITY", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > LIGHT TRANSMISSION", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > NITROGEN COMPOUNDS", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > WATER TEMPERATURE", "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER CHARACTERISTICS > pH", "Stressor Impacts and Mitigation > Biological Effects of Contaminants and Nutrients", "Field Observation", "Inorganic suspended particulate matter", "Mean Fo/Fa", "Surface Photosynthetic Active Radiation (PAR)", "Time", "Total Suspended Sediments", "organic suspended particulate material", "pH mV", "Colored Dissolved Organic Matter", "DISSOLVED OXYGEN", "Depth - YSI", "Depth – Fathometer", "INSTRUMENT - DEPTH", "Inorganic suspended particulate matter", "Mean Fo/Fa", "Nitrite + Nitrate content (concentration)", "Organic suspended particulate material", "Organic suspended particulate matter", "Oxygen – Percent Saturation", "SONAR ALTIMETER", "Salinity – Surface Water", "Sonar Altimeter– in Station Log", "Specific Conductance", "Surface Photosynthetic Active Radiation (PAR)", "Temperature – Water", "Time", "Total Dissolved Solids", "Total Pigments", "Total Suspended Sediments", "pH mV", "AUTOANALYZER > AUTOANALYZER", "CONDUCTIVITY METERS > CONDUCTIVITY METERS", "CTD > Conductivity, Temperature, Depth", "ECHO SOUNDERS > ECHO SOUNDERS", "FIA > FLOW INJECTION ANALYSIS", "FLUOROMETERS > FLUOROMETERS", "GPS RECEIVERS > GPS RECEIVERS", "OPTSPEC > Optical Spectrometer", "OXYGEN METERS > OXYGEN METERS", "PAR SENSORS > Photosynthetically Active Radiation Sensors", "PH METERS > PH METERS", "PRESSURE SENSORS > PRESSURE SENSORS", "SALINOMETERS", "SECCHI DISKS > SECCHI DISKS", "SEDIMENT CORERS > SEDIMENT CORERS", "TEMPERATURE SENSORS > TEMPERATURE SENSORS", "THERMOSALINOGRAPHS", "TRANSMISSOMETERS", "TRAPS > TRAPS", "Biospherical Instruments 2-QSP-200L", "Biospherical Instruments QSP-2300", "Biospherical Instruments QSP-2300 (in water PAR)", "Biospherical Instruments QSP-2300 and QSR2200", "Biospherical Instruments QSP-2300 in water PAR and QSR-2000/240 Surface PAR", "Biospherical Instruments QSR-2000/240 Surface PAR", "Biospherical Instruments Surface PAR QSR2200", "Chelsea Instruments Aquatraka III", "Chelsea Instruments Aquatraka III fluorometer", "Dual pumped SBE 3 temperature sensor", "Dual pumped SBE 4 conductivity sensor", "Furuno GPS Navagation GP-90", "Furuno-SC50", "GF/F Filter", "Hanna HI2003-01", "Knudsen Chirp Model 3260 (100kHz/12kHz)", "Lachat QuikChem", "Mettler Toledo DL28 Titrator", "Mettler Toledo G20 Titrator", "Multiple Instrument Data Acquisition System (MIDAS)", "Odom Echotrac II Fathometer", "SBE 13-01", "SBE 18 pH/O.R.P (Redox) sensor", "SBE 27 pH/O.R.P (Redox) sensor", "SBE 3-01/F", "SBE 4-01/0", "SBE CTD", "SBE CTD and SBE 43 dissolved oxygen sensor", "SBE CTD, SBE 43 dissolved oxygen sensors", "SBE-9+, Paroscientific Digiquartz(r) pressure sensor", "SONAR ALTIMETER", "Scientific Computer System (SCS)", "Scientific Computer System (SCS) and YSI 6820 handheld unit", "Scientific Computer System (SCS) and YSI EXO3 handheld unit", "Sea-Bird SBE 43 dissolved oxygen sensor", "Sea-Bird SBE 43 dissolved oxygen sensors", "Seabird model SBE-21 Thermosalinograph", "Seapoint Ultraviolet Fluorometer", "Sonar Altimeter, Teledyne Benthos Altimeter PSA-916", "Sonar Altimeter, Teledyne Benthos PSA-900", "Sonar Altimeter, Teledyne Benthos PSA-916", "Turner digital 10-AU", "WETLabs C-Star 25 cm path length transmissometer", "WETLabs CDOM Fluorometer", "Wetlabs Transmissometer", "YSI - handheld multi-parameter instrument", "YSI EXO3 – handheld multi-parameter instrument", "YSI – handheld multi-parameter instrumen", "YSI – handheld multi-parameter instrument", "Biospherical Instruments QSP-2300", "Biospherical Instruments QSP-2300 in water PAR and QSR Surface PAR", "Biospherical Instruments QSR Surface PAR", "Chelsea Instruments Aquatraka III", "Dual pumped SBE 3 temperature sensor", "Dual pumped SBE 4 conductivity sensor", "Furuno GPS Navagation GP-90", "Furuno GPS Navigation GP-90", "GF/F Filter", "Guildline Instruments Portasal", "Lachat QuikChem", "Mettler Toledo DL28 Titrator", "Multiple Instrument Data Acquisition System (MIDAS)", "Odom Echotrac II Fathometer", "SBE CTD", "SBE-9+, Paroscientific Digiquartz(r) pressure sensor", "Sea-Bird SBE 43 dissolved oxygen sensor", "Sonar Altimeter, Teledyne Benthos PSA-900", "Turner digital 10-AU", "WETLabs C-Star 25 cm path length transmissometer", "WETLabs CDOM fluorometer", "YSI - handheld multi-parameter instrument", "Ships", "ACADIANA (call sign: WDG3928, ICES code: 33SZ, 1985-)", "CHAPMAN (ICES code: 32YN)", "GYRE (ICES code: 32GY)", "LONGHORN (ICES code: 32LH)", "Malcolm Baldrige (call sign: WTER, ICES code: 33MW, 1988-1996)", "PELICAN (call sign: WSK3051, ICES code: 32PE, 1985-)", "Researcher (call sign: WTER, ICES code: 3175, 1970-1987)", "Tommy Munro (call sign: WDE4584, ICES code: 33TM)", "PELICAN (Call Sign WDD6114 - NODC Code 32PE)", "CONTINENT > NORTH AMERICA", "CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA", "GEOGRAPHIC REGION > NORTHERN HEMISPHERE", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO", "U.S. States and Territories > Louisiana", "Waterbodies > Gulf of Mexico", "VERTICAL LOCATION > SEA SURFACE", "106TPR", "7C298N", "82BCLC", "AL726U", "AWW41G", "E92Y1L", "FU0FJ8", "FY1EKF", "KRW314", "TAPHP4", "UH8MYB", "Y7MTJ5" ]
landingPage	https://www.ncei.noaa.gov/contact
language	[]
license	https://creativecommons.org/publicdomain/zero/1.0/
modified	2025-12-12T00:00:00.000+00:00
publisher	{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" }
references	[ "https://coastalscience.noaa.gov/science-areas/habs/habhrca/ngomex/", "https://www.ncei.noaa.gov/archive/accession/9800129" ]
rights	otherRestrictions
spatial	-89.0,28.0,-95.0,30.0
temporal	1985-07-15T00:00:00+00:00/2023-07-27T00:00:00+00:00
title	Louisiana Hypoxia Surveys 1998-2023: Physical (Hydrography), chemical (CTD), and biological (Water Quality) processes of the Texas-Louisiana continental shelf

Location