gov.noaa.nodc:0307818 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-07-14T14:56:07Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Nutrient and water chemistry data of Nu’uuli Pala Lagoon and Backreef in American Samoa from samples collected along a water quality gradient between 2024-11-08 to 2024-11-20 (NCEI Accession 0307818) 2025-09-30 publication 2025-09-10 creation International DOI Foundation (IDF) 10.25921/g9rv-6355 NOAA National Centers for Environmental Information gov.noaa.nodc:0307818 NCEI Archive Management System 0307818 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Lori Luers NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division nmfs.pic.credinfo@noaa.gov https://www.pifsc.noaa.gov/ecosystem_sciences/ HTTPS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division website Institution web page information resourceProvider NOAA Pacific Islands Fisheries Science Center (NMFS/PIFSC) resourceProvider Joy Smith NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division joy.smith@noaa.gov https://www.pifsc.noaa.gov/ecosystem_sciences/ HTTPS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division website Institution web page information principalInvestigator Lori Luers NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division lori.luers@noaa.gov https://www.pifsc.noaa.gov/ecosystem_sciences/ HTTPS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division website Institution web page information pointOfContact Juliette Verstaen NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division juliette.verstaen@noaa.gov https://www.pifsc.noaa.gov/ecosystem_sciences/ HTTPS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division website Institution web page information collaborator NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division https://www.pifsc.noaa.gov/ecosystem_sciences/ HTTPS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division website Institution web page information author NOAA Pacific Islands Fisheries Science Center (NMFS/PIFSC) contributor tableDigital The data described here are from water samples collected during NOAA Pacific Islands Fisheries Science Center (PIFSC), Ecosystem Sciences Division (ESD) led fly-in Mission to Nu'uuli, American Samoa from November 4-21, 2024. Five seawater samples were collected at each site, with a total of 20 sites established across a locally known water quality gradient. The seawater samples were processed in the field, then sent to the University of Hawaii at Manoa's SOEST S-Lab to be analyzed for water chemistry and nutrients. This water quality and chemistry data includes chlorophyll-a, dissolved nitrogen, dissolved phosphorus, total suspended solids, seawater salinity (measured at NOAA), and seawater pH (measured in the field). The analysis of water samples was one of several surveys conducted at the same sites across Nu'uuli Pala lagoon and backreef in November 2024. Other surveys are described separately and accessible under 'Related Items' and include surveys of coral demography, benthic imagery/benthic cover, subsurface temperature loggers, non-coral communities, and coral demography. The project was funded by NOAA CRCP under project number 31454. Samples were collected by NOAA snorkelers Joy Smith, Juliette Verstaen, and Isabelle Basden. Land-based sources of pollution negatively impact reef communities. Our goal here was to collect water samples and analyze them for their nutrients and chemical properties. We intend to assess whether or not a water quality gradient exists in the coral reefs of Nu'uuli Pala lagoon and backreef. The focal point of the mission was to establish a biological and water quality baseline for Nu'uuli Pala lagoon and backreef. This work was aimed at identifying measurable spatial differences in the structure and composition of the benthic and coral community at Nu'uuli Pala Lagoon and Backreef that can be explained by measurable spatial patterns of water quality (nutrients and sediments). This work will enable Federal and jurisdictional resource managers to more effectively assess the effectiveness of watershed management actions reducing land-based pollution and impacts to the adjacent coral reef ecosystems. Funding Agency: Coral Reef Conservation Program (CRCP) completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0307818 Preview graphic PNG 0307818 NCEI ACCESSION NUMBER 2025-09-05 publication AMMONIA (NH3) CHLOROPHYLL A nitrate + nitrite content (concentration) pH phosphate SALINITY silicate suspended solids TOTAL PHOSPHORUS WATER TEMPERATURE theme NODC DATA TYPES THESAURUS CTD laboratory analysis Niskin bottle pH sensor instrument NODC INSTRUMENT TYPES THESAURUS chemical in situ laboratory analyses physical water chemistry theme NODC OBSERVATION TYPES THESAURUS NOAA Pacific Islands Fisheries Science Center dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Pacific Islands Fisheries Science Center dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coral Reef Conservation Program (CRCP) CORAL REEF STUDIES project NODC PROJECT NAMES THESAURUS South Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication CRED CREP Coral Reef Ecosystem Division Coral Reef Ecosystem Program ESD Ecosystem Sciences Division PIFSC Pacific Island Fisheries Science Center dataCentre Contributing Data Centers DOC/NOAA/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian 31454 Develop monitoring capacity of American Samoan jurisdictional partners and observing LBSP impacts on coral reefs project CRCP Project Numeric Data Sets > Water Quality theme CoRIS Discovery Thesaurus 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 > Hydrosphere > Water Quality EARTH SCIENCE > Oceans > Ocean Chemistry > Ammonia EARTH SCIENCE > Oceans > Ocean Chemistry > Chlorophyll EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrate EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrite EARTH SCIENCE > Oceans > Ocean Chemistry > Nutrients EARTH SCIENCE > Oceans > Ocean Chemistry > Phosphate EARTH SCIENCE > Oceans > Ocean Chemistry > Silicate EARTH SCIENCE > Oceans > Ocean Chemistry > pH EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature EARTH SCIENCE > Oceans > Salinity/Density > Salinity EARTH SCIENCE > Terrestrial Hydrosphere > Water Quality/Water Chemistry > Suspended Solids theme CoRIS Theme Thesaurus EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SUSPENDED SOLIDS EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian CTD > Conductivity, Temperature, Depth NISKIN BOTTLES PH METERS > PH METERS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian COUNTRY/TERRITORY > United States of America > American Samoa > Tutuila Island > Nu'uuli (14S170W0037) OCEAN BASIN > Pacific Ocean > Tutuila Island > Nu'uuli (14S170W0037) place CoRIS Place Thesaurus OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian American Samoa place Provider Place Names YUFE9E Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division (2025). Nutrient and water chemistry data of Nu’uuli Pala Lagoon and Backreef in American Samoa from samples collected along a water quality gradient between 2024-11-08 to 2024-11-20 (NCEI Accession 0307818). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g9rv-6355. Accessed [date]. 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SPDX License: Creative Commons Zero v1.0 Universal (CC0-1.0) Pacific Islands Fisheries Science Center, 2025: Nutrient and water chemistry data of Nu'uuli Pala Lagoon and Backreef in American Samoa from samples collected along a water quality gradient between 2024-11-08 to 2024-11-20 2025 publication https://www.fisheries.noaa.gov/inport/item/74827 HTTPS https://www.fisheries.noaa.gov/inport/item/74827 InPort Metadata Record information NOAA Pacific Islands Fisheries Science Center (NMFS/PIFSC) publisher tableDigital crossReference eng; USA utf8 environment oceans -170.7107 -170.6999 -14.32444 -14.31784 2024-11-08 2024-11-20 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact 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. Contact NCEI for other distribution options and instructions. CSV 0.364 https://doi.org/10.25921/g9rv-6355 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/307818 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/307818 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0241/0307818/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0307818 v1.1 was published. 2025-09-30T20:37:36Z NCEI Accession 0307818 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0307818/1.1 HTTPS NCEI Accession 0307818 v1.1 published 2025-09-30T20:37:36Z download dataset Parameter or Variable: pH (measured); Units: pH; Observation Category: in situ; Sampling Instrument: pH sensors; Sampling and Analyzing Method: Handheld YSI pH sensor was used at time of seawater sample collection Parameter or Variable: suspended solids (calculated); Units: mg/L; Observation Category: laboratory analysis; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Volumes of seawater collected with Niskin bottle, then filtered, dried and weighed in laboratory. Parameter or Variable: CHLOROPHYLL A (calculated); Units: microgram/liter; Observation Category: laboratory analysis; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Five water samples were collected at each of 18 sites along the water quality gradient in Aua, American Samoa and sent to SOEST-S lab for analysis.; Data Quality Method: Niskin bottle was used to collect seawater at reef depth, filtered and sent to SOEST-S lab for analysis. Parameter or Variable: SALINITY (measured); Units: practical salinity unit; Observation Category: in situ; Sampling Instrument: CTD; Sampling and Analyzing Method: Following a 1 minute soak, the CTD was lowered in profiling mode at an even pace (descent rate ~0.5 to 0.75 meters per second) to a depth of 0-5 m at 18 sites along the water quality gradient in Aua, American Samoa established by the NOAA Fisheries, Ecosystem Sciences Division. Salinity and temperature from CTD cast at same time and depth as water sample (at reef depth) was incorporated into this dataset. 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, the CTD was lowered in profiling mode at an even pace (descent rate ~0.5 to 0.75 meters per second) to a depth of 0-5 m at 18 sites along the water quality gradient in Aua, American Samoa established by the NOAA Fisheries, Ecosystem Sciences Division. Salinity and temperature from CTD cast at same time and depth as water sample (at reef depth) was incorporated into this dataset.; 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 year; resolution: 0.00005 deg C; Parameter or Variable: silicate (calculated); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: laboratory analysis; Sampling and Analyzing Method: Niskin bottle was used to collect seawater at reef depth, filtered and sent to SOEST-S lab for analysis. Parameter or Variable: nitrate + nitrite content (concentration) (calculated); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: laboratory analysis; Sampling and Analyzing Method: Niskin bottle was used to collect seawater at reef depth, filtered and sent to SOEST-S lab for analysis. Parameter or Variable: AMMONIA (NH3) (calculated); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: laboratory analysis; Sampling and Analyzing Method: Niskin bottle was used to collect seawater at reef depth, filtered and sent to SOEST-S lab for analysis. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian CTD CTD Conductivity-Temperature-Depth probe laboratory analysis laboratory analysis use as an observation type Niskin bottle Niskin bottle Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle? pH sensor pH sensor generic meter used to measure pH Any of a class of instruments used to quantify pH in a water or other type of sample.