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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_963736_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_963736_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_963736_v1/ public [Carbonate chemistry for OAE North Atlantic experiments] - Carbonate chemistry data for shipboard ocean alkalinity enhancement (OAE) experiments in the North Atlantic on R/V Atlantic Explorer cruise AE2320 in September 2023 (OCE-PRF:  Towards Quantifying Calcium Carbonate Sediment Dissolution During Marine Diagenesis) To explore mineral formation due to alkalinity addition, we present results from shipboard experiments in which an aqueous solution of NaOH was added to unfiltered seawater collected from the surface ocean in the Sargasso Sea. Alkalinity addition ranged from 500 to 2000 micromoles per kilogram (µmol.kg-1) and the carbonate chemistry was monitored through time by measuring total alkalinity (TA) and dissolved inorganic carbon (DIC), which were used to calculate Ω. The amount of precipitate and its minerology were determined throughout the experiments. Mineral precipitation took place in all experiments over a timescale of hours to days. The dominant mineralogy of precipitate is aragonite with trace amounts of calcite and brucite. Aragonite crystallite size increases and its micro-strain decreases with time, consistent with Ostwald ripening. This dataset contains carbonate chemistry data that include TA and DIC measurements, precipitation rates from the shipboard experiments, and precipitation rates calculated in the same way (by changes in alkalinity through time) for the study of Moras et al. (2022) and precipitation rate data from Mucci et al. (1989).\n\ncdm_data_type = Other\nVARIABLES:\nExperiment_name (unitless)\nTA_addition (micromoles (umol))\nStart_day (unitless)\nStart_time (unitless)\nEnd_day (unitless)\nEnd_time (unitless)\nDuration (hours (h))\nmeasured_TA (micromoles per kilogram (umol/kg))\nTA_std (micromoles per kilogram (umol/kg))\nmeasured_DIC (micromoles per kilogram (umol/kg))\nDIC_std (micromoles per kilogram (umol/kg))\ncalculated_DIC (micromoles per kilogram (umol/kg))\ncalculated_CaCO3_precipitate (milligrams per kilogram (mg/kg))\n https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_963736_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/963736 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_963736_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_963736_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_963736_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_905357_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_905357_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_905357_v1/ public [pH internal Consistency Experiment: Measured pH and nutrients] - Measured pH and nutrient data acquired during the pH internal consistency experiment. (Improving Accuracy and Precision of Marine Inorganic Carbon Measurements) These data include the measured pHt, total alkalinity, dissolved inorganic carbon, raw pHt absorbance, and calculated pHt of 25 batches of seawater as a function of temperature, salinity, and pCO2. These data were used to evaluate the internal consistency of 120 different possible combinations of CO2 system constants. \n\nThe marine inorganic carbon system can be calculated with two measured parameters due to thermodynamic relationships. However, there are many different parameterizations for the required constants and the most accurate or best is not known. These data were used to evaluate the constants and make recommendations for which constants to use, and how to perform CO2 system calculations.\n\ncdm_data_type = Other\nVARIABLES:\nBatch (unitless)\nPractical_Salinity (unitless)\nTemp (degrees Celsius (˚C))\nmeas_pHt (unitless)\npHt_std_err (unitless)\nmeas_TA (micromoles per kilogram (µmol/kg))\nTA_std (micromoles per kilogram (µmol/kg))\nmeas_DIC (micromoles per kilogram (µmol/kg))\nDIC_std (micromoles per kilogram (µmol/kg))\nequilibrator_pCO2 (microatmospheres (µatm))\nPO4 (micromoles per kilogram (µmol/kg))\nPO4_stdev (micromoles per kilogram (µmol/kg))\nSi (micromoles per kilogram (µmol/kg))\nSi_stdev (micromoles per kilogram (µmol/kg))\n https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_905357_v1/index.htmlTable https://www.bco-dmo.org/dataset/905357 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_905357_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_905357_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_905357_v1
log in [SMIIL salt marsh discrete samples] - Discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity from the Seven Mile Island Innovation Laboratory (SMIIL) from 2022 to 2024 (Sediment transport and water quality in watersheds and coastlines of the United States) This dataset contains discrete sample measurements of dissolved oxygen, dissolved inorganic carbon, and total alkalinity collected from 2022 through 2024 from a tidal salt marsh in New Jersey, USA. The marsh is located landward of Seven Mile Island, a populated barrier island in Cape May County, New Jersey, and is a part of the Seven Mile Island Innovation Laboratory (SMIIL), a research initiative focused on advancing dredging and marsh restoration practices. Samples in this dataset were collected as part of a collaboration between Boston College and the U.S. Army Corps of Engineers Engineer Research and Development Center. This project encompassed multi-year biogeochemical sensor deployments within the main tidal salt marsh channel and salt ponds on the marsh platform, as well as targeted deployments to monitor beneficial use dredged sediment placements. Beginning in August-September 2022, discrete samples for dissolved oxygen, total alkalinity, and dissolved inorganic carbon were collected at the start and end of each sensor deployment for additional sensor calibration and validation. We provide the discrete sample measurements alongside collected salinity and temperature sensor data from the locations where sensors were deployed.\n\ncdm_data_type = Other\nVARIABLES:\nTrip_ID (unitless)\ntime (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)\nStation_ID (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nTemp_C (degrees Celsius)\nTemp_flag (unitless)\nSal_PSU (Practical Salinity Units)\nSal_flag (unitless)\nOxygen1 (umol/kg)\nOxygen1_flag (unitless)\nOxygen2 (umol/kg)\nOxygen2_flag (unitless)\nOxygen3 (umol/kg)\n... (7 more variables)\n BCO-DMO bcodmo_dataset_971872_v1

 
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