Dissolved inorganic carbon, total alkalinity, sensor pH, pCO2, rhodamine concentration, nutrients, and other variables obtained from a tracer study for the development of in-water monitoring, reporting, and verification (MRV) of ship-based ocean alkalinity enhancement aboard the R/V Connecticut crise (EXPOCODE 33LQ20230901) in the North Atlantic Ocean, Northeast U.S. Shelf in from 2023-09-02 to 2023-09-04 (NCEI Accession 0305856)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 26, 2026 | Last Modified: 2025-07-07T00:00:00.000+00:00

This data package contains the shipboard (CTD bottle, CTD sensor profile, and underway measurements) and drifter data collected during a tracer study for the development of in-water monitoring, reporting, and verification (MRV) of ship-based ocean alkalinity enhancement aboard the R/V Connecticut in the North Atlantic Ocean, Northeast U.S. Shelf in September 2023. The campaign was named LOC-01, the first field campaign of the Locking Ocean Carbon in the Northeast Shelf and Slope (LOC-NESS) Project. A patch of rhodamine water tracer dye was created and then tracked and monitored for 36 hours using the ship’s underway system, a CTD rosette, and Lagrangian drifters. Measurements include rhodamine concentration, salinity, temperature, and a suite of carbonate and other chemical parameters. The cruise was designed to enable the development of a measurement, reporting, and verification (MRV) framework for ocean alkalinity enhancement (OAE), one that explicitly ties an OAE intervention and the resulting carbon dioxide removal to the dynamic baseline ocean state using these in situ observations.

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description	This data package contains the shipboard (CTD bottle, CTD sensor profile, and underway measurements) and drifter data collected during a tracer study for the development of in-water monitoring, reporting, and verification (MRV) of ship-based ocean alkalinity enhancement aboard the R/V Connecticut in the North Atlantic Ocean, Northeast U.S. Shelf in September 2023. The campaign was named LOC-01, the first field campaign of the Locking Ocean Carbon in the Northeast Shelf and Slope (LOC-NESS) Project. A patch of rhodamine water tracer dye was created and then tracked and monitored for 36 hours using the ship’s underway system, a CTD rosette, and Lagrangian drifters. Measurements include rhodamine concentration, salinity, temperature, and a suite of carbonate and other chemical parameters. The cruise was designed to enable the development of a measurement, reporting, and verification (MRV) framework for ocean alkalinity enhancement (OAE), one that explicitly ties an OAE intervention and the resulting carbon dioxide removal to the dynamic baseline ocean state using these in situ observations.
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identifier	gov.noaa.nodc:0305856
issued	2025-07-03T00:00:00.000+00:00
keyword	[ "0305856", "AMMONIUM (NH4)", "CHLOROPHYLL A", "DELTA CARBON-13", "DELTA NITROGEN-15", "DEPTH - OBSERVATION", "DISSOLVED INORGANIC CARBON (DIC)", "DISSOLVED OXYGEN", "HYDROSTATIC PRESSURE", "nitrate + nitrite content (concentration)", "partial pressure of carbon dioxide - water", "Particulate Inorganic Carbon", "PARTICULATE ORGANIC CARBON", "pH", "phosphate", "SALINITY", "silicate", "total alkalinity", "WATER TEMPERATURE", "buoy - drifting buoy", "carbon dioxide (CO2) gas analyzer", "CTD", "Niskin bottle", "nutrient autoanalyzer", "oxygen sensor", "pH sensor", "salinometer", "temperature sensor", "biological", "chemical", "discrete sample", "physical", "surface underway", "Connecticut", "Woods Hole Oceanographic Institution", "Woods Hole Oceanographic Institution", "Ocean Carbon and Acidification Data System (OCADS)", "Ship of Opportunity Programme (SOOP)", "East Coast - US/Canada", "North Atlantic Ocean", "oceanography", "WHOI > WOODS HOLE OCEANOGRAPHIC INSTITUTION", "LOC01", "33LQ20230901", "Ocean Carbon and Acidification Data System (OCADS) Project", "Coastal", "LOC-NESS", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE", "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 > NITROGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON", "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 PRESSURE > WATER PRESSURE", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY", "Other", "Ammonium", "CTDOXY", "CTDPRES", "CTDSAL_PSS78", "CTDTEMP_ITS90", "Chl_a_sensor", "DIC", "Delta_C13_DIC", "Delta_C13_POC", "Delta_N15_TPN", "Depth", "Nitrate_and_Nitrite", "Oxygen", "Particulate_Inorganic_Carbon", "Particulate_Organic_Carbon", "Phosphate", "Rhodamine", "Salinity_PSS78", "Silicate", "Speed_mph", "TA", "Temperature_ITS90", "Temperature_hull_ITS90", "Temperature_lab_ITS90", "Total_Particulate_Nitrogen", "dfCO2", "pH_NBS_measured_electrode", "AUTOANALYZER > AUTOANALYZER", "CO2 ANALYZERS > CO2 ANALYZERS", "CTD > Conductivity, Temperature, Depth", "DRIFTING BUOYS > DRIFTING BUOYS", "NISKIN BOTTLES", "OXYGEN METERS > OXYGEN METERS", "PH METERS > PH METERS", "SALINOMETERS", "TEMPERATURE SENSORS > TEMPERATURE SENSORS", "Ships", "CONNECTICUT (call sign: WCY4995, ICES code: 33LQ, 1998-)", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN", "North Atlantic Ocean", "Northeast U.S. Shelf" ]
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modified	2025-07-07T00:00:00.000+00:00
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references	[ "https://doi.org/10.5194/egusphere-2025-1348", "https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system" ]
rights	otherRestrictions
spatial	-70.661,41.0241,-72.0044,41.3021
temporal	2023-09-02T00:00:00+00:00/2023-09-04T00:00:00+00:00
title	Dissolved inorganic carbon, total alkalinity, sensor pH, pCO2, rhodamine concentration, nutrients, and other variables obtained from a tracer study for the development of in-water monitoring, reporting, and verification (MRV) of ship-based ocean alkalinity enhancement aboard the R/V Connecticut crise (EXPOCODE 33LQ20230901) in the North Atlantic Ocean, Northeast U.S. Shelf in from 2023-09-02 to 2023-09-04 (NCEI Accession 0305856)