Publication Date:
2024-03-22
Description:
This dataset contains the results of the fluorescent dissolved organic matter characterisation (FDOM) and water mass optimum multiparameter analysis from the MAFIA cruise (Migrants and Active Flux In the Atlantic ocean). Samples were collected in the tropical and subtropical Atlantic during the MAFIA cruise (April 2015) on board the BIO Hespérides. Seawater samples for biogeochemical analyses were collected at 13 stations (from the Brazilian coast to the Canary Islands), from the surface down to 3500 m, using a General Oceanics oceanographic rosette equipped with 24 l PVC Niskin bottles. Oxygen solubility was computed using the equation of Benson and Krause (1984). AOU (µmol/kg) was calculated by subtracting measured oxygen concentration from the oxygen solubility values at saturation, with respect to the atmosphere. Fluorescence measurements were performed with a Perkin-Elmer LS55 spectrofluorometer and FDOM was characterised by means of a Parallel Factor analysis. The flag denotes if FDOM values were from direct measurement or are interpolated values (some interpolated values were added to match the 16S amplicon data). Integrated values were estimated by multiplying the discrete measurements by the distance, in meters, between samples.The aim of this dataset was to jointly characterise the FDOM and water mass distributions to infer the processes that shape the dissolved organic matter pool in the deep ocean (water mass mixing and history vs. local processes).
Keywords:
Absorption coefficient, colored dissolved organic matter at 254 nm; Atlantic; Atlantic Ocean; bathypelagic; Biogeochemical impact of mesoscale and sub-mesoscale processes along the life history of cyclonic and anticyclonic eddies: plankton variability and productivity; Calculated; Campaign; Chlorophyll a, integrated; Constraining organic carbon fluxes in an eastern boundary upwelling ecosystem (NW Africa): the role of non-sinking carbon in the context of the biological pump; CTD, Sea-Bird, SBE 911plus; CTD/Rosette; CTD-RO; dark ocean; Date/Time of event; DEPTH, water; e-IMPACT; Event label; Fluorescence intensity, maximum, DOM; fluorescent dissolved organic matter; FLUXES; Hespérides; Latitude of event; Longitude of event; MAFIA; MAFIA_01_D-1; MAFIA_02_L-1; MAFIA_03_L-1; MAFIA_04_L-1; MAFIA_05_L-1; MAFIA_06_L-1; MAFIA_07_L-1; MAFIA_08_L-1; MAFIA_09_L-1; MAFIA_10_D-1; MAFIA_11_L-1; MAFIA_12_L-1; mesopelagic; Migrants and Active Flux In the Atlantic Ocean; optimum multiparameter analysis; Oxygen; Oxygen, apparent utilization; Oxygen, Benson & Krause 1984; Parallel factor analysis (PARAFAC); Pressure, water; Salinity; Sample ID; Spectrophotometer, Ocean Optics USB2000; Station label; SUMMER; Sustainable Management of Mesopelagic Resources; Temperature, water, potential; Titration, Winkler; Validation flag/comment; water masses
Type:
Dataset
Format:
text/tab-separated-values, 3925 data points
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