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Dissolved inorganic carbon, total alkalinity, pH, water temperature and salinity measured from discrete surface samples, taken at the site of GraysRf_81W_31N mooring in Gray’s Reef National Marine Sanctuary, East Coast of the United States on 2025-06-29 (NCEI Accession 0306562)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 26, 2026 | Last Modified: 2025-07-28T00:00:00.000+00:00
This NCEI accession consists of dissolved inorganic carbon, total alkalinity, pH, water temperature and salinity measured from discrete surface samples, taken at the site of GraysRf_81W_31N mooring in Gray’s Reef National Marine Sanctuary, East Coast of the United States on 2025-06-29. Operation of the Grays Reef time-series mooring has been a multi-organization effort which has successfully collected high-resolution data since 2006. The mooring is located in the South Atlantic Bight offshore Georgia, USA and within the boundaries of Gray’s Reef National Marine Sanctuary. It sits along the divide between the inner and middle shelf with water depths of 20 m. Water chemistry is primarily controlled by the middle shelf oceanic dynamics, but during heavy rain events, it can be affected by freshwater plumes coming from the numerous rivers along the Georgia and South Carolina coast. Temperature also plays a major role in the partial pressure of carbon dioxide (pCO2) variability with seasonal changes being apparent. During summer months, GRNMS acts as a CO2 source to the atmosphere while during winter months it is a CO2 sink. The benthic community at GRNMS has proven to be hardy enduring large seasonal swings of seawater CO2 and pH.

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0306562 DISSOLVED INORGANIC CARBON (DIC) pH SALINITY total alkalinity WATER TEMPERATURE carbon dioxide (CO2) gas analyzer conductivity sensor pH sensor temperature sensor titrator chemical discrete sample surface measurements time series CHARTER/FISHING BOATS University of Georgia University of Georgia Ocean Carbon and Acidification Data System (OCADS) US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) East Coast - US/Canada Gray's Reef National Marine Sanctuary North Atlantic Ocean oceanography Time series Ocean Carbon and Acidification Data System (OCADS) Project EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY Time series DIC TA pH CO2 ANALYZERS > CO2 ANALYZERS CONDUCTIVITY METERS > CONDUCTIVITY METERS PH METERS > PH METERS TEMPERATURE SENSORS > TEMPERATURE SENSORS OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN East Coast - US/Canada Gray's Reef National Marine Sanctuary North Atlantic Ocean

Complete Metadata
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description This NCEI accession consists of dissolved inorganic carbon, total alkalinity, pH, water temperature and salinity measured from discrete surface samples, taken at the site of GraysRf_81W_31N mooring in Gray’s Reef National Marine Sanctuary, East Coast of the United States on 2025-06-29. Operation of the Grays Reef time-series mooring has been a multi-organization effort which has successfully collected high-resolution data since 2006. The mooring is located in the South Atlantic Bight offshore Georgia, USA and within the boundaries of Gray’s Reef National Marine Sanctuary. It sits along the divide between the inner and middle shelf with water depths of 20 m. Water chemistry is primarily controlled by the middle shelf oceanic dynamics, but during heavy rain events, it can be affected by freshwater plumes coming from the numerous rivers along the Georgia and South Carolina coast. Temperature also plays a major role in the partial pressure of carbon dioxide (pCO2) variability with seasonal changes being apparent. During summer months, GRNMS acts as a CO2 source to the atmosphere while during winter months it is a CO2 sink. The benthic community at GRNMS has proven to be hardy enduring large seasonal swings of seawater CO2 and pH.
distribution 
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identifier gov.noaa.nodc:0306562
issued 2025-07-25T00:00:00.000+00:00
keyword 
                                            [
  "0306562",
  "DISSOLVED INORGANIC CARBON (DIC)",
  "pH",
  "SALINITY",
  "total alkalinity",
  "WATER TEMPERATURE",
  "carbon dioxide (CO2) gas analyzer",
  "conductivity sensor",
  "pH sensor",
  "temperature sensor",
  "titrator",
  "chemical",
  "discrete sample",
  "surface measurements",
  "time series",
  "CHARTER/FISHING BOATS",
  "University of Georgia",
  "University of Georgia",
  "Ocean Carbon and Acidification Data System (OCADS)",
  "US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP)",
  "East Coast - US/Canada",
  "Gray's Reef National Marine Sanctuary",
  "North Atlantic Ocean",
  "oceanography",
  "Time series",
  "Ocean Carbon and Acidification Data System (OCADS) Project",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH",
  "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE",
  "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY",
  "Time series",
  "DIC",
  "TA",
  "pH",
  "CO2 ANALYZERS > CO2 ANALYZERS",
  "CONDUCTIVITY METERS > CONDUCTIVITY METERS",
  "PH METERS > PH METERS",
  "TEMPERATURE SENSORS > TEMPERATURE SENSORS",
  "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN",
  "East Coast - US/Canada",
  "Gray's Reef National Marine Sanctuary",
  "North Atlantic Ocean"
]
landingPage https://www.ncei.noaa.gov/contact
language 
                                            []
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2025-07-28T00:00:00.000+00:00
publisher 
                                            {
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
}
references 
                                            [
  "https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system",
  "https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Moorings/Grays_Reef.html"
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rights otherRestrictions
spatial -80.8668,31.4001,-80.8668,31.4001
temporal 2025-06-29T00:00:00+00:00/2025-06-29T00:00:00+00:00
title Dissolved inorganic carbon, total alkalinity, pH, water temperature and salinity measured from discrete surface samples, taken at the site of GraysRf_81W_31N mooring in Gray’s Reef National Marine Sanctuary, East Coast of the United States on 2025-06-29 (NCEI Accession 0306562)

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