This data package contains data measured using an autonomous total alkalinity titrator on board the NOAA Ship Henry B. Bigelow cruises in 2021. Data were collected from the ship's underway seawater supply during the seven hydrographic surveys, from March 12 to November 3, 2021. Spatial data coverage extends from the Gulf of Maine to Cape Hatteras. This effort was part of the NOAA Ocean Acidification Program (OAP) grant entitled "Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water". Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's AOML.

This dataset contains total alkalinity, temperature and salinity data measured using an autonomous, automated total alkalinity titrator on board NOAA Ship Henry B. Bigelow ECOA-2 cruise (EXPOCODE 33HH20180625) in the East Coast of the U.S. from 2018-06-25 to 2018-07-29. Data were collected from the ship's underway seawater supply. Spatial data coverage extends from the Gulf of Maine to Florida. This effort was part of the NOAA Ocean Acidification Program (OAP) and Ocean Technology Transfer Project grant entitled "Tracking Ocean Alkalinity using New Carbon Measurement Technologies (TAACT)". Measurements of pCO2 taken on these cruises are available from NOAA's NCEI accession 0173357.

This data package contains data measured using an autonomous, automated total alkalinity titrator on board NOAA Ship Henry Bigelow. Data were collected from the ship's underway seawater supply during the seven hydrographic surveys, from May 8 to October 10, 2023. Spatial data coverage extends from the Gulf of Maine to Cape Hatteras. This effort was part of the NOAA Ocean Acidification Program (OAP) grant entitled "Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations". Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's Atlantic Oceanographic and Meteorological Laboratory.

This dataset contains total alkalinity, temperature and salinity data measured using an autonomous, automated total alkalinity titrator on board NOAA Ship Henry B. Bigelow 2017 cruises in the East Coast of the U.S. from 2017-02-11 to 2017-07-19. Data were collected from the ship's underway seawater supply on seven cruises of opportunity. Spatial data coverage extends from the Gulf of Maine to Cape Hatteras, with some data in the South Atlantic Bight as well. This effort was part of the NOAA Ocean Acidification Program (OAP) and Ocean Technology Transfer Project grant entitled "Tracking Ocean Alkalinity using New Carbon Measurement Technologies (TAACT)". Measurements of pCO2 taken on these cruises are available from NOAA's NCEI accession 0162290.

This data package contains Underway total alkalinity, water temperature, salinity and other variables collected from surface seawater during the NOAA Ship Ronald H. Brown 2022 East Coast Ocean Acidification cruises (ECOA2022) (EXPOCODEs 33RO20220806, 33RO20220906) in the North Atlantic Ocean, U.S. East Coast from 2022-08-06 to 2022-09-23. Data were collected from the ship's underway seawater supply. This effort was part of the NOAA Ocean Acidification Program (OAP) grant. Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's AOML.

This dataset contains surface discrete measurements of dissolved inorganic carbon, total alkalinity, water temperature, salinity and other variables collected from surface discrete observations using flow through pump and other instruments during the NOAA Ship Henry B. Bigelow cruise HB1103_Leg2 (EXPOCODE 33HH20110604), in the North Atlantic ocean from 2011-06-29 to 2011-07-14. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry. Through the SOOP program we measure air and ocean surface pCO2 and take discrete samples of other carbon parameters. This effort is in support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP) and the Climate Program Office.

This data package contains Underway total alkalinity, water temperature, salinity and other variables collected from surface seawater during the NOAA Ship Ronald H. Brown cruise RB2104 (EXPOCODE 33RO20210315) in the Caribbean Sea, North Pacific Ocean, U.S. West Coast from 2021-03-17 to 2021-03-30. Data were collected from the ship's underway seawater supply during a transit from Key West FL to San Diego CA. This effort was part of the NOAA Ocean Acidification Program (OAP) grant entitled "Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations". Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's AOML.

This data package contains Underway total alkalinity, water temperature, salinity and other variables collected from surface seawater during the NOAA Ship Ronald H. Brown GOMECC2021 cruise RB2103 (EXPOCODE 33RO20210913) in the Gulf of Mexico, North Atlantic Ocean from 2021-09-13 to 2021-10-21. Data were collected from the ship's underway seawater supply during the GOMECC-4 cruise. This effort was part of the NOAA Ocean Acidification Program (OAP) grant entitled "Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations". Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's AOML.

This data package contains Underway total alkalinity, water temperature, salinity and other variables collected from surface seawater during the NOAA Ship Ronald H. Brown cruise RB2105Transit (EXPOCODE 33RO20210814) in the Gulf of Mexico and West Coast of the U.S., North Pacific Ocean from 2021-08-19 to 2021-08-24. Data were collected from the ship's underway seawater supply during a transit from San Diego CA to Key West FL. This effort was part of the NOAA Ocean Acidification Program (OAP) grant entitled "Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations". Along with total alkalinity, corresponding temperature and salinity measurements are included. Measurements of pCO2 taken on these cruises are available from NOAA's AOML.

This dataset includes surface underway, chemical, meteorological and physical data collected from NOAA Ship Henry B. Bigelow in the North Atlantic Ocean, US North East Coast in 2024. These data include measurements of mole fraction of carbon dioxide (CO2) in the equilibrator headspace (dry) at equilibrator temperature, mole fraction of CO2 measured in dry outside air, barometric pressure in the equilibrator headspace, barometric pressure, corrected to sea level, water temperature in equilibrator, sea surface temperature, sea surface salinity, fugacity of CO2 in sea water at SST and 100% humidity, and difference between sea water fugacity of CO2 (fCO2) and interpolated air fCO2. The instruments used to collect these data include carbon dioxide gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide measurement. In February 2011, the Ocean Carbon Group at NOAA's Atlantic Oceanographic and Meteorological Laboratory (AOML) installed an instrument to measure CO2 levels in surface water and air on NOAA Ship Henry B. Bigelow. The Bigelow primarily operates in the North Atlantic Ocean between North Carolina and Maine.