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National Coral Reef Monitoring Program: Shallow Water and Offshore Conductivity-Temperature-Depth (CTD) Profiles for selected locations across American Samoa from 2023-07-01 to 2023-08-09 (NCEI Accession 0300979)

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The data described here result from near-shore shallow water and offshore Conductivity-Temperature-Depth (CTD) casts conducted at select sites around American Samoa as part of the ongoing National Coral Reef Monitoring Program (NCRMP). These surveys were conducted by the NOAA Pacific Islands Fisheries Science Center (PIFSC), Ecosystem Sciences Division (ESD; formerly the Coral Reef Ecosystem Division) during an ESD-led NCRMP mission to American Samoa in 2023. The CTD casts provide vertical profiles (30-m max depth, downcast only) of water column conductivity, temperature, and pressure, with calculated depth, salinity, and water density.

The CTD (RBR Concerto3) was deployed from a small boat using a hand line and held just under the surface for 1 minute to equilibrate sensors. Afterward, data were collected by lowering the CTD in profiling mode at an even pace (descent rate ~0.5 to 0.75 meters per second) to a maximum depth of ~30 m. Offshore (~10-15km from land) CTD profiles were collected from the ship to a maximum depth of ~10m. Data processing was performed using RBR Ruskin Data Processing Software and the R package "oce".
  • Cite as: NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division (2025). National Coral Reef Monitoring Program: Shallow Water and Offshore Conductivity-Temperature-Depth (CTD) Profiles for selected locations across American Samoa from 2023-07-01 to 2023-08-09 (NCEI Accession 0300979). https://www.ncei.noaa.gov/archive/accession/0300979. In NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division. National Coral Reef Monitoring Program: Shallow water conductivity-temperature-depth (CTD) profiles for selected locations across American Samoa. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5sj1hxf. Accessed [date].
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Distributor NOAA National Centers for Environmental Information(link is external)
+1-301-713-3277
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information(link is external)
ncei.info@noaa.gov
Time Period 2023-07-01 to 2023-08-09
Spatial Bounding Box Coordinates
West: -170.9949
East: -168.1333
South: -14.83054
North: -13.94606
Spatial Coverage Map
General Documentation
Associated Resources
  • National Coral Reef Monitoring Program: Shallow water conductivity-temperature-depth (CTD) profiles for selected locations across American Samoa
  • Coral Reef Conservation Program (2016). Documentation for NOAA's Coral Reef Conservation Program (CRCP) National Coral Reef Monitoring Program (NCRMP) data archived at NCEI (NCEI Accession 0157633). NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0157633.
  • Pacific Islands Fisheries Science Center, 2021: National Coral Reef Monitoring Program: Shallow Water Conductivity-Temperature-Depth (CTD) Profiles for select locations across American Samoa in 2015 and 2018, https://www.fisheries.noaa.gov/inport/item/36761.
  • Hoeke, R., Gove, J., Smith, E., Fisher-Pool, P., Lammers, M., Merritt, D., Vetter, O., Young, C., Wong, K., & Brainard, R. (2009). Coral reef ecosystem integrated observing system: In-situ oceanographic observations at the US Pacific islands and atolls. Journal of Operational Oceanography, 2(2), 3–14. https://doi.org/10.1080/1755876x.2009.12027737
    • Parent ID (indicates this dataset is related to other data):
    • gov.noaa.nodc:NCRMP-CTD-AmSam
Publication Dates
  • publication: 2025-02-12
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Purpose CTD casts are conducted to characterize the spatial structure of the physical and chemical properties of the ocean environment influencing the living coral reef resources observed during NOAA National Coral Reef Monitoring Program (NCRMP) missions. The NOAA National Coral Reef Monitoring Program (NCRMP) details a long-term, ecosystem-scale approach for assessing coral reef climate, fish, benthic, and socioeconomic variables in a consistent and integrated manner. NCRMP coordinates various NOAA Coral Reef Conservation Program (CRCP) biological, physical, and human dimensions activities into a cohesive NOAA-wide effort. Through the implementation of NCRMP, NOAA is able to clearly and concisely communicate results of national-scale monitoring to national, state, and territorial policy makers, resource managers, and the public on a periodic basis. NCRMP provides a framework for conducting sustained observations of biological, climate, and socioeconomic indicators at 10 priority coral reefs across the U.S. and its territories. This integrated approach consolidates monitoring of coral reefs under a uniform method in the Pacific, Atlantic, Caribbean, and the Gulf of Mexico. NCRMP is funded by the CRCP and the NOAA Ocean Acidification Program (OAP), and supported by NOAA Fisheries, NOAA National Centers for Coastal Ocean Science (NCCOS), NOAA's Atlantic Oceanographic & Meteorological Laboratory (AOML), NOAA Coral Reef Watch, and many other partners. The Pacific Islands Fisheries Science Center (PIFSC), Ecosystem Sciences Division (ESD) at NOAA Fisheries leads in-situ NCRMP climate monitoring in the U.S. Pacific Islands Region (formerly under the Pacific Reef Assessment and Monitoring Program [RAMP]). The climate component of NCRMP in the Pacific provides a comprehensive view of climate change impacts on coral reef ecosystems and helps identify areas of resilience and vulnerability. The key indicators used to identify and monitor climate-driven trends include 1) thermal stress caused by changes in sea temperature, 2) ocean acidification resulting from changes in carbonate chemistry, and 3) associated ecological impacts on carbonate accretion rates, erosion, and benthic community structure. ESD scientists work closely with CRCP and partners during annual Pacific NCRMP missions to deploy oceanographic (subsurface temperature recorders) and ecological (calcification accretion units [CAUs] and bioerosion monitoring units [BMUs]) instruments at fixed sites in the Pacific Ocean and conduct CTD casts and water sampling to evaluate coral reef environments. The in-situ data and satellite-based observations are also used in modeling efforts. Innovative analysis techniques are used to develop products that provide scientists, managers, decision makers and the public a better understanding of a region's resources and how they are changing over time.
Use Limitations
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division (2025). National Coral Reef Monitoring Program: Shallow Water and Offshore Conductivity-Temperature-Depth (CTD) Profiles for selected locations across American Samoa from 2023-07-01 to 2023-08-09 (NCEI Accession 0300979). https://www.ncei.noaa.gov/archive/accession/0300979. In NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division. National Coral Reef Monitoring Program: Shallow water conductivity-temperature-depth (CTD) profiles for selected locations across American Samoa. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5sj1hxf. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Points of Contact
Publishers
Acknowledgments
  • Funding Agency: US DOC; NOAA; NOS; Coral Reef Conservation Program
  • Funding Agency: US DOC; NOAA; OAR; Ocean Acidification Program
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
CoRIS Discovery Thesaurus
  • Numeric Data Sets > Oceanography
CoRIS Theme Thesaurus
  • 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 Physical
  • EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
  • EARTH SCIENCE > Oceans > Ocean Pressure > Sea Level Pressure
  • 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
Global Change Master Directory (GCMD) Science Keywords
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS CoRIS Place Thesaurus
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ofu Island (14S169W0013)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Olosega Island (14S169W0014)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Rose Atoll (14S168W0001)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Rose Island (14S170W0041)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ta'u Island (14S169W0012)
  • COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)
  • COUNTRY/TERRITORY > United States of America > American Samoa > Ofu Island > Ofu (14S169W0002)
  • COUNTRY/TERRITORY > United States of America > American Samoa > Olosega Island > Olosega (14S169W0016)
  • OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)
  • OCEAN BASIN > Pacific Ocean > American Samoa > Rose Atoll (14S168W0001)
  • OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)
  • OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu (14S169W0002)
  • OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu Island (14S169W0013)
  • OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega (14S169W0016)
  • OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega Island (14S169W0014)
  • OCEAN BASIN > Pacific Ocean > Manu'a Group > Ta'u Island (14S169W0012)
  • OCEAN BASIN > Pacific Ocean > Rose Atoll > Rose Island (14S170W0041)
Global Change Master Directory (GCMD) Location Keywords
Project keywords NODC PROJECT NAMES THESAURUS CRCP Project
  • 743
  • National Coral Reef Monitoring Program
Keywords NCEI ACCESSION NUMBER
Keywords Send2NCEI Submission Package ID
  • 91JPU1
Use Constraints
  • Cite as: NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division (2025). National Coral Reef Monitoring Program: Shallow Water and Offshore Conductivity-Temperature-Depth (CTD) Profiles for selected locations across American Samoa from 2023-07-01 to 2023-08-09 (NCEI Accession 0300979). https://www.ncei.noaa.gov/archive/accession/0300979. In NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division. National Coral Reef Monitoring Program: Shallow water conductivity-temperature-depth (CTD) profiles for selected locations across American Samoa. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5sj1hxf. Accessed [date].
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processing Steps
  • 2025-02-12T20:49:35Z - NCEI Accession 0300979 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: CONDUCTIVITY (measured); Units: siemens; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division.; Data Quality Method: RBR Concerto3 CTD sensor: Conductivity - measurement range: 0-85 mS/cm; accuracy: +/- 0.003 mS/cm; stability: 0.010 mS/cm/year; resolution: 0.001 mS/cm.
  • Parameter or Variable: DEPTH - SENSOR (calculated); Units: meter; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division. Offshore CTDs were deployed by CTD-rosette from a NOAA Ship..
  • Parameter or Variable: HYDROSTATIC PRESSURE (measured); Units: decibar; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division.; Data Quality Method: RBR Concerto3 CTD sensor: Pressure - measurement range: 0-500 m; accuracy: +/- 0.05% full scale; stability: +/- 0.05% full scale/year; resolution: 0.001% full scale.
  • Parameter or Variable: SALINITY (calculated); Units: practical salinity unit; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division. Offshore CTDs were deployed by CTD-rosette from a NOAA Ship..
  • Parameter or Variable: WATER DENSITY (calculated); Units: kg/m^3; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division. Offshore CTDs were deployed by CTD-rosette from a NOAA Ship..
  • Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, CTDs are usually deployed 5-10 feet above the reef at depths ranging from 0-30 m at permanent monitoring sites established by the NOAA Fisheries, Ecosystem Sciences Division.; Data Quality Method: RBR Concerto3 CTD sensor: Temperature - measurement range: -5-35 deg C; accuracy: +/-0.002 deg C; stability: 0.002 deg C per month; resolution: 0.00005 deg C.
Acquisition Information (collection)
Instrument
  • CTD
Platform
  • NOAA Ship Rainier
Last Modified: 2025-02-18T14:45:53Z
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