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National Coral Reef Monitoring Program: Diel oceanographic and carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites across the Hawaiian Archipelago since 2016

Published by Pacific Islands Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 02, 2026 at 11:23 PM | Dataset Last Updated: January 01, 2026 at 12:00 AM
The ocean acidification 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 record are from diel suites deployed across the Hawaiian Archipelago since 2016 during ESD-led NCRMP missions: Kure Atoll and Lisianski Island in 2016 (Northwestern Hawaiian Islands ), Lanai and Hawaii Island (main Hawaiian Islands) in 2019, and Maui (main Hawaiian Islands) in 2024. 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 consists of: 1 SBE-19plus (2016) or RBR concerto3 (2019 and 2024) CTD, 1 Nortek Acoustic Doppler Current Profiler (ADCP), 1 Satlantic SeaFET pH (2016 and 2019) or Sunburst SAMI-pH (2024) sensor, 1 RBR dissolved oxygen sensor (2019 and 2024 only), 1 RBR photosynthetically active radiation sensor (2019 and 2024 only), and up to 9 Programmable Underwater Collectors (PUCs, 2016) or Sub-surface Automated Samplers (SAS, 2019), each of which collect a water sample at ~3-4 hour 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

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
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  "fn": "Barkley, Hannah C",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:hannah.barkley@noaa.gov"
}
describedByType application/octet-steam
description The ocean acidification 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 record are from diel suites deployed across the Hawaiian Archipelago since 2016 during ESD-led NCRMP missions: Kure Atoll and Lisianski Island in 2016 (Northwestern Hawaiian Islands ), Lanai and Hawaii Island (main Hawaiian Islands) in 2019, and Maui (main Hawaiian Islands) in 2024. 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 consists of: 1 SBE-19plus (2016) or RBR concerto3 (2019 and 2024) CTD, 1 Nortek Acoustic Doppler Current Profiler (ADCP), 1 Satlantic SeaFET pH (2016 and 2019) or Sunburst SAMI-pH (2024) sensor, 1 RBR dissolved oxygen sensor (2019 and 2024 only), 1 RBR photosynthetically active radiation sensor (2019 and 2024 only), and up to 9 Programmable Underwater Collectors (PUCs, 2016) or Sub-surface Automated Samplers (SAS, 2019), each of which collect a water sample at ~3-4 hour 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.
distribution 
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identifier https://data.noaa.gov/waf/NOAA/nmfs/pifsc/iso/xml/54894.xml
issued 2019-01-01T00:00:00.000+00:00
keyword 
[
  "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",
  "CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > HAWAII",
  "OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS > HAWAII ISLAND",
  "OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS > LANAI",
  "OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS > MAUI",
  "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 > Oxygen",
  "EARTH SCIENCE > Oceans > Ocean Chemistry > Saturation State",
  "EARTH SCIENCE > Oceans > Ocean Chemistry > pH",
  "EARTH SCIENCE > Oceans > Ocean Optics > Photosynthetically Active Radiation",
  "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",
  "DEPTH - SENSOR",
  "DISSOLVED INORGANIC CARBON (DIC)",
  "PRESSURE - WATER [HYDROSTATIC PRESSURE]",
  "Photosynthetic Photon Flux Density (PPFD)",
  "SALINITY - BOTTOM WATER",
  "SIGMA-T",
  "WATER TEMPERATURE",
  "dissolved oxygen",
  "pH",
  "partial pressure of carbon dioxide - water",
  "ADCP",
  "CTD - moored CTD",
  "Coulometer for DIC measurement",
  "PAR sensor",
  "dive computer",
  "oxygen sensor",
  "pH sensor",
  "temperature sensor",
  "titrator",
  "continuous",
  "in situ",
  "physical",
  "time series profile",
  "water chemistry",
  "HI'IALAKAI",
  "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 > United States of America > Hawaii > Honolulu > Kure Atoll (28N178W0001)",
  "COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Lisianski Island (25N173W0001)",
  "COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Lanai Island (20N156W0002)",
  "COUNTRY/TERRITORY > United States of America > Hawaiian Islands (21N157W0027)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands (21N157W0027)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Lanai Island > Lanai Island (20N156W0002",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Kure Atoll (28N178W0001)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Lisianski Island (25N173W0001)",
  "Central Pacific Ocean",
  "Coastal Waters of Hawaii",
  "North Pacific Ocean",
  "Papahanaumokuakea Marine National Monument",
  "CRED",
  "CREP",
  "CTD",
  "Coral Reef Ecosystem Division",
  "Coral Reef Ecosystem Program",
  "ESD",
  "Ecosystem Sciences Division",
  "NCRMP",
  "National Coral Reef Monitoring Program",
  "PIFSC",
  "PUC",
  "Pacific Islands Fisheries Science Center",
  "RAMP",
  "REA",
  "Rapid Ecological Assessment",
  "Reef Assessment and Monitoring Program",
  "SAMI-pH",
  "Subsurface Automated Samplers",
  "diel",
  "programmable underwater collector",
  "water samples",
  "NWHI",
  "Northwestern Hawaiian Islands",
  "DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
  "Hawaiian Archipelago"
]
landingPage https://www.fisheries.noaa.gov/inport/item/54894
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2026-01-01T00:00:00.000+00:00
publisher 
{
  "name": "Pacific Islands Fisheries Science Center",
  "@type": "org:Organization"
}
rights otherRestrictions, unclassified
spatial -155.9014,19.2099,-156.81341,20.8439
temporal 2019-07-10T00:00:00+00:00/2019-07-30T00:00:00+00:00
theme 
[
  "geospatial"
]
title National Coral Reef Monitoring Program: Diel oceanographic and carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites across the Hawaiian Archipelago since 2016

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