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Depth, salinity, temperature, pH, total alkalinity, and dissolved inorganic carbon collected from CTD profiler equipped with a pH sensor and Niskin bottles, using a spectrophotometer, open-cell potentiometric titration, and a Licor-700 CO2 detector at the University of Washington’s Friday Harbor Laboratory or a CO2 coulometer at the University of Washington’s School of Oceanography from 2012-04-09 to 2012-06-16 (NCEI Accession 0259305)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 29, 2026 | Last Modified: 2022-08-31T00:00:00.000+00:00
We characterized the pH environment currently experienced by Euphausia pacifica eggs and larvae at 2 stations in the northern end of Hood Canal in Puget Sound, Washington, USA (47.61, -122.94 and 47.66, -122.86; Puget Sound Regional Synthesis Model [PRISM] stations P14 and P15). The southwest station, P14, is deeper (180 m) than the northeastern station, P15 (130 m). Samples were collected during the day and night on 9−10 April and 15−16 June 2012. This design was chosen to sample during the spawning season of E. pacifica (approximately February to July) in an area where low pH waters occur. We collected physical and chemical data using a CTD profiler equipped with a pH sensor and Niskin bottles, which were used to collect water at 6 depths for spectrophotometric pH, total dissolved inorganic carbon (DIC), and total alkalinity (TA) analyses. The CTD pH sensor was not accurate, so it was only used to determine the shape of the pH profile relative to discrete measurements. Spectrophotometric pH was measured shipboard immediately after water sampling. Total alkalinity was measured by open-cell potentiometric titration, and DIC was measured by acidification and quantification either using a Licor-700 CO2 detector, or a CO2 coulometer.

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0259305 DEPTH - SENSOR DISSOLVED INORGANIC CARBON (DIC) partial pressure of carbon dioxide - water pH SALINITY total alkalinity WATER TEMPERATURE carbon dioxide (CO2) gas analyzer coulometer for DIC measurement CTD Niskin bottle spectrophotometer titrator discrete sample in situ laboratory analyses physical profile Friday Harbor The University of British Columbia University of Washington UW School of Oceanography NOAA Northwest Fisheries Science Center Ocean Carbon and Acidification Data System (OCADS) Coastal Waters of Southeast Alaska and British Columbia Puget Sound oceanography DOC/NOAA/NMFS/NWFSC > Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce UWA/OCEAN > School of Oceanography, University of Washington Ocean Acidification Program (OAP) Ocean Carbon and Acidification Data System (OCADS) Project EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY Profile CTDSAL CO2 ANALYZERS > CO2 ANALYZERS COULOMETERS CTD > Conductivity, Temperature, Depth NISKIN BOTTLES OPTSPEC > Optical Spectrometer OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

Complete Metadata
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description We characterized the pH environment currently experienced by Euphausia pacifica eggs and larvae at 2 stations in the northern end of Hood Canal in Puget Sound, Washington, USA (47.61, -122.94 and 47.66, -122.86; Puget Sound Regional Synthesis Model [PRISM] stations P14 and P15). The southwest station, P14, is deeper (180 m) than the northeastern station, P15 (130 m). Samples were collected during the day and night on 9−10 April and 15−16 June 2012. This design was chosen to sample during the spawning season of E. pacifica (approximately February to July) in an area where low pH waters occur. We collected physical and chemical data using a CTD profiler equipped with a pH sensor and Niskin bottles, which were used to collect water at 6 depths for spectrophotometric pH, total dissolved inorganic carbon (DIC), and total alkalinity (TA) analyses. The CTD pH sensor was not accurate, so it was only used to determine the shape of the pH profile relative to discrete measurements. Spectrophotometric pH was measured shipboard immediately after water sampling. Total alkalinity was measured by open-cell potentiometric titration, and DIC was measured by acidification and quantification either using a Licor-700 CO2 detector, or a CO2 coulometer.
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identifier gov.noaa.nodc:0259305
issued 2022-08-26T00:00:00.000+00:00
keyword 
                                            [
  "0259305",
  "DEPTH - SENSOR",
  "DISSOLVED INORGANIC CARBON (DIC)",
  "partial pressure of carbon dioxide - water",
  "pH",
  "SALINITY",
  "total alkalinity",
  "WATER TEMPERATURE",
  "carbon dioxide (CO2) gas analyzer",
  "coulometer for DIC measurement",
  "CTD",
  "Niskin bottle",
  "spectrophotometer",
  "titrator",
  "discrete sample",
  "in situ",
  "laboratory analyses",
  "physical",
  "profile",
  "Friday Harbor",
  "The University of British Columbia",
  "University of Washington",
  "UW School of Oceanography",
  "NOAA Northwest Fisheries Science Center",
  "Ocean Carbon and Acidification Data System (OCADS)",
  "Coastal Waters of Southeast Alaska and British Columbia",
  "Puget Sound",
  "oceanography",
  "DOC/NOAA/NMFS/NWFSC > Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
  "UWA/OCEAN > School of Oceanography, University of Washington",
  "Ocean Acidification Program (OAP)",
  "Ocean Carbon and Acidification Data System (OCADS) Project",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON",
  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH",
  "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE",
  "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY",
  "Profile",
  "CTDSAL",
  "CO2 ANALYZERS > CO2 ANALYZERS",
  "COULOMETERS",
  "CTD > Conductivity, Temperature, Depth",
  "NISKIN BOTTLES",
  "OPTSPEC > Optical Spectrometer",
  "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN"
]
landingPage https://www.ncei.noaa.gov/contact
language 
                                            []
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2022-08-31T00:00:00.000+00:00
publisher 
                                            {
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
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references 
                                            [
  "https://doi.org/10.25921/jcpv-dv34",
  "https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system"
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rights otherRestrictions
spatial -122.86,47.61,-122.94,47.66
temporal 2012-04-09T00:00:00+00:00/2012-06-16T00:00:00+00:00
title Depth, salinity, temperature, pH, total alkalinity, and dissolved inorganic carbon collected from CTD profiler equipped with a pH sensor and Niskin bottles, using a spectrophotometer, open-cell potentiometric titration, and a Licor-700 CO2 detector at the University of Washington’s Friday Harbor Laboratory or a CO2 coulometer at the University of Washington’s School of Oceanography from 2012-04-09 to 2012-06-16 (NCEI Accession 0259305)

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