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National Coral Reef Monitoring Program: Diel seawater carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites in the Mariana Archipelago in 2017 and 2022

Published by Pacific Islands Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2024-01-01T00:00:00.000+00:00
The diel suite is an autonomous instrument package that measures diel variability in coral reef oceanographic conditions and seawater carbonate chemistry. Diel suite surveys are conducted by the NOAA Pacific Islands Fisheries Science Center (PIFSC), Ecosystem Sciences Division (ESD) within coral reef ecosystems across the Pacific Islands Region as part of the NOAA National Coral Reef Monitoring Program (NCRMP). The data provided in this data set are from diel suites deployed at sites in Guam, Aguijan, Maug, and Pagan, Mariana Archipelago in 2017 and 2022. Diel suites were deployed on the reef for at least 24 hours to measure in-situ salinity, temperature, pressure, pH, current direction and magnitude, dissolved oxygen, and photosynthetically active radiation (PAR). Seawater samples were also collected for laboratory analyses of dissolved inorganic carbon (DIC) and total alkalinity (TA). Components of the carbonate system--including pH, pCO2 (partial pressure of carbon dioxide), and aragonite saturation state--are calculated from DIC, TA, temperature, salinity and pressure. Each diel suite typically consisted of: 1 SBE-19plus or RBR concerto3 CTD sensor, 1 Nortek Acoustic Doppler Current Profiler (ADCP), 1 Satlantic SeaFET Ocean pH sensor, 1 SBE or RBR dissolved oxygen sensor (2022 only), 1 RBR photosynthetically active radiation sensor (2022 only), 1 tilt current meter (2022 only), and up to 9 Programmable Underwater Collectors (PUCs, 2017) or Sub-surface Automated Samplers (SAS, 2022), each of which collected a water sample at set intervals. Instruments deployed, samples collected, and sample intervals are recorded in the summary file enclosed with the data package, and exceptions to the standard diel suite are also noted.

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DOC/NOAA/NMFS/PIFSC/ESD > Ecosystem Sciences Division, Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > REEF > CORAL REEF EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS > SPEED PROFILES EARTH SCIENCE > OCEANS > OCEAN OPTICS > PHOTOSYNTHETICALLY ACTIVE RADIATION EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > OCEAN SALINITY OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > GUAM OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > NORTHERN MARIANA ISLANDS ADCP > Acoustic Doppler Current Profiler CTD > Conductivity, Temperature, Depth CURRENT METERS OXYGEN METERS > OXYGEN METERS PAR SENSORS > Photosynthetically Active Radiation Sensors PH METERS > PH METERS 743 National Coral Reef Monitoring Program Numeric Data Sets > Oceanography EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > In Situ Chemical EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > In Situ Physical EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs EARTH SCIENCE > Oceans > Ocean Chemistry > Alkalinity EARTH SCIENCE > Oceans > Ocean Chemistry > Calcification EARTH SCIENCE > Oceans > Ocean Chemistry > Carbon Dioxide > Partial Pressure EARTH SCIENCE > Oceans > Ocean Chemistry > Carbonate Chemistry EARTH SCIENCE > Oceans > Ocean Chemistry > Chemistry Monitoring and Assessment EARTH SCIENCE > Oceans > Ocean Chemistry > Climate Change EARTH SCIENCE > Oceans > Ocean Chemistry > Dissolution EARTH SCIENCE > Oceans > Ocean Chemistry > Dissolved Gases EARTH SCIENCE > Oceans > Ocean Chemistry > Dissolved Inorganic Carbon EARTH SCIENCE > Oceans > Ocean Chemistry > Ocean Acidification EARTH SCIENCE > Oceans > Ocean Chemistry > Saturation State EARTH SCIENCE > Oceans > Ocean Chemistry > pH EARTH SCIENCE > Oceans > Ocean Circulation EARTH SCIENCE > Oceans > Ocean Circulation > Water Current Direction EARTH SCIENCE > Oceans > Ocean Circulation > Water Velocity 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 ALKALINITY - TOTAL [total alkalinity] ARAGONITE SATURATION STATE CONDUCTIVITY CURRENT DIRECTION CURRENT SPEED DEPTH - SENSOR DISSOLVED INORGANIC CARBON (DIC) PRESSURE - WATER [HYDROSTATIC PRESSURE] SALINITY - BOTTOM WATER SIGMA-T WATER TEMPERATURE pH partial pressure of carbon dioxide - water CTD - moored CTD Coulometer for DIC measurement pH sensor titrator continuous current measurements in situ physical time series profile water chemistry CORAL REEF STUDIES Coral Reef Conservation Program National Coral Reef Monitoring Program US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division COUNTRY/TERRITORY > Northern Mariana Islands > Aguihan > Aguihan Island (Aguijan) (14N145E0006) COUNTRY/TERRITORY > Northern Mariana Islands > Maug > Maug Island (20N145E0001) COUNTRY/TERRITORY > Northern Mariana Islands > Pagan > Pagan Island (18N145E0001) COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Aguihan Island Reefs > Aguihan Island (Aguijan) (14N145E0006) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Maug Island > Maug Island (20N145E0001) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Pagan Island > Pagan Island (18N145E0001) Marianas Trench Marine National Monument NW Pacific HI'IALAKAI RAINIER SMALL BOAT ADCP CRED CREP CTD Coral Reef Ecosystem Division Coral Reef Ecosystem Program ESD Ecosystem Sciences Division NCRMP National Coral Reef Monitoring Program PAR PIFSC PUC Pacific Islands Fisheries Science Center RAMP REA Rapid Ecological Assessment Reef Assessment and Monitoring Program SAS Subsurface Automated Samplers TCM diel dissolved oxygen photosynthetically active radiation programmable underwater collector tilt current meter water samples CNMI Commonwealth of the Northern Mariana Islands Mariana Archipelago Marianas DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce Marianas Archipelago

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