Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise FC2507 (EXPOCODE 33WA20250703) in the East Coast of the US, North Atlantic Ocean on 2025-07-03 (NCEI Accession 0309256)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 29, 2026 | Last Modified: 2025-11-19T00:00:00.000+00:00

This dataset consists of water temperature, salinity, nutrients, dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise FC2507 (EXPOCODE 33WA20250703) in the East Coast of the US, North Atlantic Ocean on 2025-07-03. Understanding of carbon transport and ocean acidification along the US East Coast, particularly in the Florida Straits, is currently limited by insufficient carbon chemistry data. To close this critical gap, the Role of the Overturning Circulation in Carbon Accumulation (ROCCA) project leverages the observations and logistics of NOAA’s established Western Boundary Time Series (WBTS) project at approximately 27N. This effort is obtaining new, high-quality measurements of carbonate chemistry (dissolved inorganic carbon, total alkalinity, and pH on the total scale) and associated parameters (nutrients). The resulting comprehensive dataset is being used to accurately estimate anthropogenic carbon transports across the subtropical North Atlantic and to determine the contributions of air-sea fluxes and ocean circulation to regional carbon accumulation.

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description	This dataset consists of water temperature, salinity, nutrients, dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise FC2507 (EXPOCODE 33WA20250703) in the East Coast of the US, North Atlantic Ocean on 2025-07-03. Understanding of carbon transport and ocean acidification along the US East Coast, particularly in the Florida Straits, is currently limited by insufficient carbon chemistry data. To close this critical gap, the Role of the Overturning Circulation in Carbon Accumulation (ROCCA) project leverages the observations and logistics of NOAA’s established Western Boundary Time Series (WBTS) project at approximately 27N. This effort is obtaining new, high-quality measurements of carbonate chemistry (dissolved inorganic carbon, total alkalinity, and pH on the total scale) and associated parameters (nutrients). The resulting comprehensive dataset is being used to accurately estimate anthropogenic carbon transports across the subtropical North Atlantic and to determine the contributions of air-sea fluxes and ocean circulation to regional carbon accumulation.
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identifier	gov.noaa.nodc:0309256
issued	2025-11-05T00:00:00.000+00:00
keyword	[ "0309256", "AMMONIUM (NH4)", "CHLOROPHYLL", "DEPTH - OBSERVATION", "DISSOLVED INORGANIC CARBON (DIC)", "DISSOLVED OXYGEN", "nitrate + nitrite content (concentration)", "pH", "phosphate", "SALINITY", "silicate", "total alkalinity", "WATER TEMPERATURE", "carbon dioxide (CO2) gas analyzer", "CTD", "Niskin bottle", "nutrient autoanalyzer", "oxygen sensor", "pH sensor", "salinometer", "temperature sensor", "titrator", "biological", "chemical", "discrete sample", "physical", "profile", "R/V F.G. Walton Smith", "National Oceanography Centre", "NOAA Atlantic Oceanographic and Meteorological Laboratory", "University of Miami", "NOAA Atlantic Oceanographic and Meteorological Laboratory", "Ocean Carbon and Acidification Data System (OCADS)", "US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP)", "East Coast - US/Canada", "North Atlantic Ocean", "oceanography", "DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce", "U-SOTON/NOC > National Oceanography Centre, University of Southampton", "FC2507", "33WA20250703", "Ocean Carbon and Acidification Data System (OCADS) Project", "Coastal", "ROCCA", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY", "Discrete measurement", "Profile", "AMMONIA", "CHL and PHAE", "CTDOXY", "CTDSAL", "CTDTMP", "DIC", "Depth_meters", "NITRIT+NITRAT", "PHSPHT", "SILCAT", "TAlk", "pH", "pH_Analysis_Temp_DegC", "AUTOANALYZER > AUTOANALYZER", "CO2 ANALYZERS > CO2 ANALYZERS", "CTD > Conductivity, Temperature, Depth", "NISKIN BOTTLES", "OXYGEN METERS > OXYGEN METERS", "PH METERS > PH METERS", "SALINOMETERS", "TEMPERATURE SENSORS > TEMPERATURE SENSORS", "F. G. Walton Smith (call sign: WCZ6292, ICES code: 33WA, 1999-)", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN", "North Atlantis Ocean", "US East Coast" ]
landingPage	https://www.ncei.noaa.gov/contact
language	[]
license	https://creativecommons.org/publicdomain/zero/1.0/
modified	2025-11-19T00:00:00.000+00:00
publisher	{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" }
references	[ "https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system", "https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/Walton_Smith.html" ]
rights	otherRestrictions
spatial	-79.6196,26.9846,-79.9289,26.9924
temporal	2025-07-03T00:00:00+00:00/2025-07-03T00:00:00+00:00
title	Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise FC2507 (EXPOCODE 33WA20250703) in the East Coast of the US, North Atlantic Ocean on 2025-07-03 (NCEI Accession 0309256)