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Carbon-related, hydrographic data collected during th NOAA Ship Ronald H. Brown 4th Gulf of Mexico Ecosystems and Carbon Cycle (GOMECC-4) cruise in Gulf of Mexico and North Atlantic Ocean from 2021-09-13 to 2021-10-21 (NCEI Accession 0294320)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: October 13, 2025 | Last Modified: 2024-07-16T00:00:00.000+00:00
This dataset contains seawater analyses conducted during the fourth Gulf of Mexico Ecosystems and Carbon Cycle (GOMECC-4) cruise on board the NOAA Ship Ronald H. Brown departing from Key West, FL into the Gulf of Mexico and then around the coastal waters of the Gulf of Mexico in a counter-clockwise direction. Samples were collected using a CTD-O2 rosette equipped with 24 niskin-style bottles. The cruise took place from September 13–October 21, 2021 and ended in St. Petersburg, FL. The effort was in support of the coastal monitoring and research objectives of NOAA’S Ocean Acidification Program. The expedition was designed to obtain a snapshot of key carbon, physical, and biogeochemical parameters as they relate to ocean acidification (OA) in the coastal realm. This was the fourth occupation of the Gulf of Mexico as part of the Ocean Acidification Program’s monitoring efforts, with the first three occurring in 2007, 2012 and 2017. The cruise included a series of 15 transects approximately orthogonal to the coast of the Gulf of Mexico and a 16th partial transect along the 27°N line between Florida and the Bahamas. On the transit between each of these transects, discrete samples were collected from the underway seawater line to obtain a comprehensive set of underway measurements.

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0294320 CARBON - CARBONATE CHLOROPHYLL DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN HYDROSTATIC PRESSURE NITRATE nitrate + nitrite content (concentration) NITRITE partial pressure of carbon dioxide - water pH phosphate SALINITY silicate total alkalinity WATER TEMPERATURE carbon dioxide (CO2) gas analyzer CTD Niskin bottle nutrient autoanalyzer oxygen sensor pH sensor temperature sensor thermosalinograph titrator biological chemical discrete sample physical profile NOAA Ship Ronald H. Brown NOAA Atlantic Oceanographic and Meteorological Laboratory University of Louisiana at Lafayette University of Miami University of South Florida 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) Gulf of Mexico North Atlantic Ocean oceanography DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce RB21-03 33RO20210913 Ocean Acidification Program (OAP) Ocean Carbon and Acidification Data System (OCADS) Project GOMECC-4 Gulf of Mexico and East Coast Carbon (GOMECC) EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBONATE 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 PRESSURE > WATER PRESSURE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY Discrete measurement Profile CARBONATE_UMOL_KG CHLA_MG_M3 (WSW) CHLA_MG_M3 <20 CHLA_MG_M3 >20 CTDOXY_UMOL_KG CTDPRS_DBAR CTDSAL_PSS78 CTDTMP_ITS-90_DEG_C DIC_UMOL_KG NITRATE_NITRITE_UMOL_KG NITRATE_UMOL_KG NITRITE_UMOL_KG OXYGEN_UMOL_KG PHOSPHATE_UMOL_KG PH_TOT_MEA SALINITY_PSS78 SILICATE_UMOL_KG TA_UMOL_KG fCO2_measured_UATM AUTOANALYZER > AUTOANALYZER CO2 ANALYZERS > CO2 ANALYZERS CTD > Conductivity, Temperature, Depth NISKIN BOTTLES OXYGEN METERS > OXYGEN METERS PH METERS > PH METERS TEMPERATURE SENSORS > TEMPERATURE SENSORS THERMOSALINOGRAPHS Ships Ronald H. Brown (call sign: WTEC, ICES code: 33RO, 1997-) OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO Gulf of Mexico North Atlantic Ocean

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