gov.noaa.nodc:0189727 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 2025-05-16T15:50:30Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Diel seawater carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites in Batangas, Philippines from 2015-05-21 to 2015-05-31 (NCEI Accession 0189727) 2019-06-20 publication 2021-09-10 revision 2019-06-06 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0189727 NCEI Archive Management System 0189727 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 Kevin Trick University of Hawaii Joint Institute for Marine and Atmospheric Research (JIMAR) Kevin.Trick@noaa.gov https://www.soest.hawaii.edu/cimar/ HTTPS University of Hawaii Joint Institute for Marine and Atmospheric Research (JIMAR) website Institution web page information resourceProvider 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 resourceProvider Kevin Trick NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division kevin.trick@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 Hannah C. Barkley NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division hannah.barkley@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 Ecosystem Sciences Division, Pacific Islands Fisheries Science Center 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, 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 contributor tableDigital The data provided in this data set are from diel surveys conducted by the NOAA Pacific Islands Fisheries Science Center (PIFSC), Ecosystem Sciences Division (ESD)---formerly the Coral Reef Ecosystem Division---in the Philippines from May 21-31, 2015. The ocean acidification diel suite is an autonomous instrument package that measures diel variability in coral reef seawater carbonate chemistry. These diel suites were deployed on hard-bottom shallow-water (< 15 m) habitats at fixed climate survey sites located within coral reef ecosystems. The diel suites were deployed on the reef for at least 24 hours to measure in-situ salinity, temperature, pressure, pH, current direction and magnitude, and dissolved oxygen. 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 consisted of: 1 SBE-19plus CTD sensor, 1 Nortek Acoustic Doppler Current Profiler (ADCP), 1 Satlantic SeaFET Ocean pH sensor, 1 SBE-43 oxygen sensor co-located with the CTD, and up to 9 Programmable Underwater Collectors (PUCs), each of which collected 1 water sample at 4-hour intervals. Instruments deployed, samples collected, and sample intervals are recorded in the meta file enclosed with the data package. ESD's manual seawater sampling and other field monitoring efforts are limited to daylight hour operations. As a result, these data sets do not capture full 24-hour variability in coral reef physical and chemical environments. The ocean acidification diel suite was developed to increase the temporal resolution and coverage of oceanographic and carbonate chemistry measurements and contextualize daytime sampling within the full diel cycle. The Ecosystem Sciences Division (ESD) at NOAA Fisheries is conducting in-situ climate monitoring across the U.S. Pacific Islands Region. Climate monitoring 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) ecological impacts by collecting data on coral growth rates and community structure to understand the impacts of thermal stress and ocean acidification on the ecosystem. This particular dataset for the Philippines is part of a 3-year project ("Climate, Biodiversity and Fisheries in the Coral Triangle: Embracing the E in Ecosystem Approaches to Fisheries Management") implemented by ESD. This project was funded by NOAA's Coral Reef Conservation Program (CRCP) and the U.S. Agency for International Development (USAID) Regional Development Mission Asia (RDMA) as part of the U.S. Coral Triangle Initiative, with additional support from the Coral Triangle Support Partnership and USAID Philippines. The goal of the project was to build on ESD's expertise to provide tools and information about climate change, ocean acidification, and their impacts on biodiversity and fisheries that could inform and be incorporated into an Ecosystem Approach to Fisheries Management (EAFM) for the Philippines. ESD worked with local governments, communities, and NGOs to build science capacity by establishing robust observing capabilities and providing hands-on training to initiate collection of climate science information for the Verde Island Passage in the Philippines that can be used toward adaptive EAFM. ESD traveled to the Verde Island Passage region of the Philippines in 2012 to deploy moored oceanographic (subsurface temperature recorders [STRs]) and ecological (calcification accretion units [CAUs] and autonomous reef monitoring structures [ARMS]) instrumentation, to collect surface and bottom water samples, and to conduct benthic photo-quadrat surveys, which included the collection of benthic images; in 2013 to collect additional water samples; and again in 2015 to recover the instrumentation and to collect another round of water samples and benthic images and to conduct diel surveys. All activities were conducted by SCUBA divers at five locations in the municipalities of Mabini and Tingloy, including Batong Buhay, Koala Reserve Area, Arthur's Reef, Twin Rocks, and Batalang Bato. At each of the five locations, a shallow and deep survey site was established for a total of 10 survey sites. Funding Agency: NOAA Coral Reef Conservation Program Funding Agency: US DOS; United States Agency for International Development 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 NCEI Accession 0189727 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made. https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0189727 Preview graphic PNG 0189727 NCEI ACCESSION NUMBER 2021-08-27 publication ARAGONITE SATURATION STATE CONDUCTIVITY CURRENT DIRECTION CURRENT SPEED DEPTH - BOTTOM DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN HYDROSTATIC PRESSURE partial pressure of carbon dioxide - water pH SALINITY - BOTTOM WATER SIGMA-T total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS ADCP coulometer for DIC measurement CTD - moored CTD oxygen sensor pH sensor titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical continuous current measurements in situ laboratory analyses physical time series profile water chemistry theme NODC OBSERVATION TYPES THESAURUS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coral Reef Conservation Program (CRCP) CORAL REEF STUDIES Coral Triangle Initiative (CTI) project NODC PROJECT NAMES THESAURUS North Pacific Ocean Philippine Sea 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 Islands Fisheries Science Center dataCentre Contributing Organizations DOC/NOAA/NMFS/PIFSC/ESD > Ecosystem Sciences Division, Pacific Islands Fisheries Science Center, 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 Numeric Data Sets > Chemistry Numeric Data Sets > Oceanography theme CoRIS Discovery 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 > Baseline studies 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 Temperature > Sea Surface Temperature EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature > Bottom EARTH SCIENCE > Oceans > Salinity/Density > Conductivity EARTH SCIENCE > Oceans > Salinity/Density > Density EARTH SCIENCE > Oceans > Salinity/Density > Salinity EARTH SCIENCE > Oceans > Water Velocity theme CoRIS Theme Thesaurus EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBONATE 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 EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER 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 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 REA Rapid Ecological Assessment diel theme Provider Keywords ADCP > Acoustic Doppler Current Profiler COULOMETERS CTD > Conductivity, Temperature, Depth OXYGEN METERS > OXYGEN METERS 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 ADCP Acoustic Doppler Current Profiler Moored CTD Programmable Underwater Collector (PUC) instrument Provider Instruments COUNTRY/TERRITORY > Philippines > Batangas > Arthur's Rock (13N120E0002) COUNTRY/TERRITORY > Philippines > Batangas > Mabini (13N120E0032) COUNTRY/TERRITORY > Philippines > Batangas > Tingloy (13N120E0009) COUNTRY/TERRITORY > Philippines > Batangas > Twin Rocks Sanctuary (13N120E0005) OCEAN BASIN > Pacific Ocean > South China Sea > Balayan Bay > Arthur's Rock (13N120E0002) OCEAN BASIN > Pacific Ocean > South China Sea > Balayan Bay > Mabini (13N120E0032) OCEAN BASIN > Pacific Ocean > South China Sea > Balayan Bay > Twin Rocks Sanctuary (13N120E0005) OCEAN BASIN > Pacific Ocean > South China Sea > Maricaban Island > Tingloy (13N120E0009) place CoRIS Place Thesaurus OCEAN > PACIFIC OCEAN > NORTH 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 Arthur's Reef Batalang Bato Batong Buhay Koala Reserve Area Philippines Twin Rocks Verde Island Passage place Provider Place Names WU3UR2 Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2019). Diel seawater carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites in Batangas, Philippines from 2015-05-21 to 2015-05-31 (NCEI Accession 0189727). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0189727. 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. Pacific Islands Fisheries Science Center, 2017: Diel seawater carbonate chemistry observations from a suite of instrumentation deployed at coral reef sites in Batangas, Philippines from May 21-31, 2015, https://www.fisheries.noaa.gov/inport/item/45954. 2017 publication gov.noaa.nmfs.inport:45954 https://www.fisheries.noaa.gov/inport/item/45954 HTTPS https://www.fisheries.noaa.gov/inport/item/45954 InPort Metadata Record information NOAA Pacific Islands Fisheries Science Center (NMFS/PIFSC) publisher tableDigital crossReference SOP for instrument data processing using the R package occ 2019-05-01 publication http://rpubs.com/hbarkley/occ_SOP HTTP http://rpubs.com/hbarkley/occ_SOP SOP information Barkley, Hannah author RStudio http://rpubs.com HTTP website Institution web page information publisher documentDigital crossReference Guide to Best Practices for Ocean CO2 Measurements 2007 publication https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/Handbook_2007.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/Handbook_2007.html Best practices guide download A.G. Dickson editor C.L. Sabine editor J.R. Christian editor North Pacific Marine Science Organization (PICES) https://meetings.pices.int/ HTTPS website Institution web page information publisher documentDigital crossReference eng; USA utf8 environment oceans 120.884 120.895 13.659 13.728 2015-05-21 2015-05-31 In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. 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 1.92 https://www.ncei.noaa.gov/archive/accession/0189727 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/189727 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/189727 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0139/0189727/ 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 0189727 v1.1 was published. 2019-06-20T15:10:23Z NCEI Accession 0189727 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0189727/1.1 HTTPS NCEI Accession 0189727 v1.1 published 2019-06-20T15:10:23Z download NCEI Accession 0189727 was revised and v2.2 was published. Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. 2021-09-10T19:57:13Z NCEI Accession 0189727 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0189727/2.2 HTTPS NCEI Accession 0189727 v2.2 published 2021-09-10T19:57:13Z download dataset Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: CTD data were collected by a Sea Bird Electronics 19plus v2 SeaCAT at 10-min intervals.; Data Quality Method: Data are uploaded as HEX files, converted to CNV using SBE Data Processing Software, and converted to CSV using the 'oce' package in R. Parameter or Variable: PRESSURE - WATER [HYDROSTATIC PRESSURE] (measured); Units: decibar; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: CTD data were collected by a Sea Bird Electronics 19plus v2 SeaCAT at 10-min intervals.; Data Quality Method: Data are uploaded as HEX files, converted to CNV using SBE Data Processing Software, and converted to CSV using the 'oce' package in R. Parameter or Variable: CONDUCTIVITY (measured); Units: Siemens per meter; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: CTD data were collected by a Sea Bird Electronics 19plus v2 SeaCAT at 10-min intervals.; Data Quality Method: Data are uploaded as HEX files, converted to CNV using SBE Data Processing Software, and converted to CSV using the 'oce' package in R. Parameter or Variable: DEPTH - BOTTOM (calculated); Units: meter; Observation Category: in situ; Sampling Instrument: CTD - moored CTD Parameter or Variable: SIGMA-T (calculated); Units: kilogram/meter^3; Observation Category: in situ; Sampling Instrument: CTD - moored CTD; Sampling and Analyzing Method: Calculated sigma-t density value, the density of seawater at atmospheric pressure minus 1000. Parameter or Variable: SALINITY - BOTTOM WATER (calculated); Units: practical salinity unit; Observation Category: in situ; Sampling Instrument: CTD - moored CTD Parameter or Variable: DISSOLVED INORGANIC CARBON (DIC) (measured); Units: micromole/kilogram; Observation Category: laboratory analysis; Sampling Instrument: programmable underwater collector (PUC); Sampling and Analyzing Method: PUCs are computerized timers attached to a low-power peristaltic pump. An array of PUCs collects water samples at 4-hour intervals over a 24-hour period. Samples are collected underwater in tedlar bags pre-poisoned with mercuric chloride and transferred to glass bottles within a few hours of recovery. Water samples are analyzed for DIC and TA by the NOAA Pacific Marine Environmental Laboratory. Parameter or Variable: ALKALINITY - TOTAL [total alkalinity] (measured); Units: micromole/kilogram; Observation Category: laboratory analysis; Sampling Instrument: programmable underwater collector (PUC); Sampling and Analyzing Method: PUCs are computerized timers attached to a low-power peristaltic pump. An array of PUCs collects water samples at 4-hour intervals over a 24-hour period. Samples are collected underwater in tedlar bags pre-poisoned with mercuric chloride and transferred to glass bottles within a few hours of recovery. Water samples are analyzed for DIC and TA by the NOAA Pacific Marine Environmental Laboratory. Parameter or Variable: pH (calculated); Units: unitless; Observation Category: laboratory analysis; Sampling Instrument: programmable underwater collector (PUC) and moored CTD; Sampling and Analyzing Method: Calculated from measured DIC and TA from PUC water samples, and from temperature, salinity and pressure from the CTD. Parameter or Variable: partial pressure of carbon dioxide - water (calculated); Units: unitless; Observation Category: laboratory analysis; Sampling Instrument: programmable underwater collector (PUC) and moored CTD; Sampling and Analyzing Method: pCO2: Calculated from measured DIC and TA from PUC water samples, and from temperature, salinity and pressure from the CTD. Parameter or Variable: ARAGONITE SATURATION STATE (calculated); Units: unitless; Observation Category: laboratory analysis; Sampling Instrument: programmable underwater collector (PUC) and moored CTD; Sampling and Analyzing Method: Calculated from measured DIC and TA from PUC water samples, and from temperature, salinity and pressure from the CTD. Parameter or Variable: pH (measured); Units: unitless; Observation Category: in situ; Sampling Instrument: pH sensors; Sampling and Analyzing Method: The SeaFET pH measures in-situ pH using a solid state ISFET sensor with an AgCl external reference electrode. The electrode is conditioned in running seawater up to a week prior to deployment and stored in artificial seawater between deployments. pH data are collected in bursts of 30 measurements every 5 minutes. The SeaFET is co-deployed with a CTD. The SeaFET derives pH from both internal and external potentiometric cells, but only external pH is reported.; Data Quality Method: Temperature and salinity values from the CTD time series are used to correct the raw pH time series. SeaFET pH values are compared to pH values calculated from discrete TA and DIC samples collected at the same time and location. Parameter or Variable: CURRENT SPEED (calculated); Units: meters per second; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: ADCP measurements were collected at 10-minute intervals and binned by height above the sensor. Each height bin is represented in the data set as the upper limit of the bin height above the sensor on the seafloor (e.g., a 1.4 m bin represents current data collected between 0.4 m and 1.4 m above the ADCP). ADCP data include a blanking region, or a small distance in front of the transducer in which measurements cannot be made, of 0.2-0.4 m. Current data were grouped into 1-m height bins. Raw data downloaded from the ADCP are processed in R using the oce package. XYZ coordinate data are converted to ENU (east-north-up) coordinate system. Current speed is calculated as the square root of the sum of the squared u and v velocities and direction as the arctan(v/u).; Data Quality Method: Data are trimmed to a maximum height bin for each time step using pressure data to remove above-water signal. As a result, NULL values may exist for larger height bins above the surface of the water due to waves and tides. Parameter or Variable: CURRENT DIRECTION (measured); Units: degree; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: ADCP measurements were collected at 10-minute intervals and binned by height above the sensor. Each height bin is represented in the data set as the upper limit of the bin height above the sensor on the seafloor (e.g., a 1.4 m bin represents current data collected between 0.4 m and 1.4 m above the ADCP). ADCP data include a blanking region, or a small distance in front of the transducer in which measurements cannot be made, of 0.2-0.4 m. Current data were grouped into 1-m height bins. Raw data downloaded from the ADCP are processed in R using the oce package. XYZ coordinate data are converted to ENU (east-north-up) coordinate system.; Data Quality Method: Data are trimmed to a maximum height bin for each time step using pressure data to remove above-water signal. As a result, NULL values may exist for larger height bins above the surface of the water due to waves and tides. Parameter or Variable: DISSOLVED OXYGEN (measured); Units: milligram/liter; Observation Category: in situ; Sampling Instrument: oxygen meter; Sampling and Analyzing Method: Dissolved oxygen value measured as a concentration of milligrams of dissolved oxygen per liter of water (mg/L) from an SBE-43 oxygen sensor co-located with the CTD. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian ADCP ADCP Acoustic Doppler Current Profiler The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile. As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements. coulometer for DIC measurement coulometer for DIC measurement measures dissolved inorganic carbon (DIC) A known amount of seawater is dispensed into a stripping chamber where it is acidified and purged with an inert gas. The amount of CO2 in the resulting gas stream is determined by absorbing the CO2 in an absorbent. The pH of the solution is monitored by measuring the transmittance . CTD - moored CTD CTD - moored CTD CTD - moored CTD oxygen sensor oxygen sensor Any instrument that measures oxygen content in a compound. 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. titrator titrator titrator