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National Coral Reef Monitoring Program: Water chemistry collected at Moored Autonomous Partial Pressure of Carbon Dioxide (MAPCO2) buoys in the Pacific Ocean

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: October 04, 2025 | Last Modified: 2024-01-18T00:00:00.000+00:00
This collection contains carbonate chemistry data collected at fixed sites in the Pacific Ocean as part of calibration and validation for Moored Autonomous Partial Pressure of Carbon Dioxide (MAPCO2) buoys. The data from these MAPCO2 buoys complement a national array of moored carbon dioxide buoys across the Pacific, Atlantic, and Caribbean. The buoys are primarily funded by NOAA's Ocean Acidification Program and supported by NOAA's Pacific Marine Environmental Laboratory (PMEL), Atlantic Oceanographic and Meteorological Laboratory (AOML), and Coral Reef Conservation Program (CRCP). Samples are collected every two weeks from predetermined sites around the buoy from the boat or by SCUBA divers. The samples are processed by the AOML where they are analyzed for total alkalinity (TA) and dissolved inorganic carbon (DIC). Using the analyzed TA and DIC, alongside temperature, salinity and depth data, AOML staff calculated other important carbonate chemistry system parameters such as pH, pCO2, and aragonite saturation and reported the results in these data.

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0242581 0286801 ARAGONITE SATURATION STATE DEPTH - OBSERVATION DISSOLVED INORGANIC CARBON (DIC) partial pressure of carbon dioxide - water pH SALINITY total alkalinity WATER TEMPERATURE bottle coulometer for DIC measurement multi-parameter water quality sensor Niskin bottle titrator chemical discrete sample in situ physical surface underway survey - coral reef NOAA Atlantic Oceanographic and Meteorological Laboratory NOAA Atlantic Oceanographic and Meteorological Laboratory CORAL REEF STUDIES National Coral Reef Monitoring Program (NCRMP) Ocean Carbon and Acidification Data System (OCADS) National Marine Sanctuary of American Samoa South Pacific Ocean oceanography DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce 743 National Coral Reef Monitoring Program Ocean Acidification Program (OAP) Ocean Carbon and Acidification Data System (OCADS) Project EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBONATE 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 Discrete measurement Surface underway Aragonite_Sat_W DIC_umol/kg Salinity_Bottle Salinity_CTD Sample_Depth_m TA_umol/kg Temperature_C pCO2_uatm pH COULOMETERS NISKIN BOTTLES OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > AMERICAN SAMOA OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN American Samoa National Marine Sanctuary Fagatele Bay

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