gov.noaa.nodc:0282182 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 2026-04-30T14:42:11Z 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 Aua Reef in American Samoa from samples collected along a water quality gradient between 2022-09-13 to 2022-09-23 (NCEI Accession 0282182) 2023-09-19 publication 2023-08-29 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0282182 NCEI Archive Management System 0282182 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 (NMFS/PIFSC) joy.smith@noaa.gov principalInvestigator Lori Luers NOAA Pacific Islands Fisheries Science Center (NMFS/PIFSC) lori.luers@noaa.gov pointOfContact 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 Pacific Islands Fisheries Science Center 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 Aua, American Samoa from September 8-29, 2022. Five seawater samples were collected at each site, with a total of 18 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, nitrate, nitrite ammonia, dissolved phosphorus, phosphate, silicate, total suspended solids, and seawater pH. The analysis of water samples was one of several surveys conducted at the same sites across Aua reef in September 2022. Other surveys are described separately and listed in the 'Related Items' section of the InPort record; these include surveys of coral demography, benthic imagery/benthic cover, CTD casts, non-coral communities, and coral demography. 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 Aua. The focal point of the mission was to establish a biological and water quality and carbonate chemistry baseline for Aua reef. This work was aimed at identifying measurable spatial differences in the structure and composition of the benthic and coral community at Aua that can be explained by measurable spatial patterns of water quality (nutrients and sediments) and water chemistry (pH). This work is of fundamental importance for the development of the Aua Watershed Management Plan, and 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. Information: NOAA Coral Reef Conservation Program (CRCP) funds research under the Land-Based Sources of Pollution. This mission (Project number 31303) sought out to examine the impacts of LBSP on reef communities (coral and non-coral) in Aua, a high priority watershed in American Samoa. This mission builds on prior assessment and monitoring surveys of benthic reef communities conducted in Faga'alu and Vatia bays in 2012, 2015, and 2022 to address National and Jurisdictional goals to reduce the impacts of LBSP in local priority watersheds. Together with periodic monitoring, this coral reef community baseline for Aua reef will allow scientists to quantify temporal changes in the condition and integrity and enable Jurisdictional and Federal resource managers to make informed decisions pertaining to the protection and preservation of critical habitats. The overall effort required to evaluate the effectiveness of management strategies is significant and requires close coordination between local and Federal efforts. Funding Agency: NOAA Coral Reef Conservation Program 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:0282182 Preview graphic PNG 0282182 NCEI ACCESSION NUMBER 2023-08-25 publication AMMONIA (NH3) CHLOROPHYLL A nitrate + nitrite content (concentration) pH phosphate SALINITY silicate suspended solids Total Dissolved Nitrogen (TDN) TOTAL PHOSPHORUS WATER TEMPERATURE theme NODC DATA TYPES THESAURUS CTD laboratory analysis Niskin bottle pH sensor instrument NODC INSTRUMENT TYPES THESAURUS in situ laboratory analyses theme NODC OBSERVATION TYPES THESAURUS CHARTERED VESSEL platform NODC PLATFORM NAMES 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 Aua CRED CREP Climate Change Coral Reef Ecosystem Division Coral Reef Ecosystem Program ESD Ecosystem Sciences Division LBSP PIFSC Pacific Islands Fisheries Science Center land-based source pollution nutrients water chemistry dataCentre Contributing Organizations 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 31303 Linking watershed management actions to reef health in American Samoa project CRCP Project Numeric Data Sets > Water Quality theme CoRIS Discovery Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs EARTH SCIENCE > Oceans > Ocean Chemistry > Chemistry Monitoring and Assessment EARTH SCIENCE > Oceans > Ocean Chemistry > Ocean Acidification EARTH SCIENCE > Oceans > Ocean Chemistry > pH 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 > NITROGEN 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 > American Samoa > American Samoa (14S170W0000) COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016) OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000) OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016) place CoRIS Place Thesaurus OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > AMERICAN SAMOA 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 80W7F7 Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Ecosystem Sciences Division; Pacific Islands Fisheries Science Center (2023). Nutrient and water chemistry data of Aua Reef in American Samoa from samples collected along a water quality gradient between 2022-09-13 to 2022-09-23 (NCEI Accession 0282182). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0282182. Accessed [date]. 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. otherRestrictions 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. Nutrient and Water Chemistry Data of Aua Reef in America Samoa From Samples Collected Along a Water Quality Gradient Between 2022-09-13 to 2022-09-23. 2023 publication https://www.fisheries.noaa.gov/inport/item/68095 HTTPS InPort InPort Metadata Record information Pacific Islands Fisheries Science Center (U.S.) publisher documentDigital Pacific Islands Fisheries Science Center (U.S.) crossReference collection eng; USA utf8 environment oceans -170.669 -170.665 -14.2881 -14.2717 2022-09-13 2022-09-23 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. Originator data format 0.364 https://www.ncei.noaa.gov/archive/accession/0282182 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/282182 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/282182 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0218/0282182/ 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 0282182 v1.1 was published. 2023-09-19T21:42:21Z NCEI Accession 0282182 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0282182/1.1 HTTPS NCEI Accession 0282182 v1.1 published 2023-09-19T21:42:21Z 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: Total Dissolved Nitrogen (TDN) (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: TOTAL PHOSPHORUS (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: 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. CHARTERED VESSEL CHARTERED VESSEL