@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://metadata.macmatlas.net/dataset/628ba84e-8d58-478c-812c-50a6dfcb2326> a dcat:Dataset ;
    dct:description """This dataset contains hydrographic and biogeochemical observations collected during an oceanographic survey in Madagascar using Conductivity–Temperature–Depth (CTD) profiling systems. A total of 84 successful CTD casts were conducted using a Sea-Bird SBE 911plus CTD system mounted on a 12-bottle rosette sampler. Of these, 63 casts included discrete water sampling for analysis of pH, total alkalinity, dissolved nutrients, chlorophyll-a, dissolved oxygen, and salinity.\r
Sampling was conducted at predefined depths and targeted the fluorescence maximum following established CTD rosette protocols. In deep stations (>500 m), full water-column sampling was performed for sensor calibration and validation. Salinity and dissolved oxygen samples were analyzed using a Guildline 8410A Portasal salinometer and a Metrohm 916 Ti-Touch Winkler titration system, respectively. The dataset supports hydrographic characterization, biogeochemical analysis, and CTD sensor calibration.""" ;
    dct:identifier "628ba84e-8d58-478c-812c-50a6dfcb2326" ;
    dct:issued "2026-06-01T01:51:14.525603"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-06-04T07:52:10.342679"^^xsd:dateTime ;
    dct:publisher <https://metadata.macmatlas.net/organization/169cd6c0-3ab1-45f9-9831-ee7ff1339df8> ;
    dct:title "CTD Hydrographic and Biogeochemical Observations Using Sea-Bird SBE 911plus with Rosette Bottle Sampling in Malagasy Waters" ;
    owl:versionInfo "1.0" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Data Manager" ;
            vcard:hasEmail <mailto:roddy.rabarijaona@gmail.com> ] ;
    dcat:distribution <https://metadata.macmatlas.net/dataset/628ba84e-8d58-478c-812c-50a6dfcb2326/resource/64cfaaa9-d1c0-403e-bf90-9e0bf529170b> ;
    dcat:keyword "Biogeochemical parameters",
        "CTD profiling",
        "Hydrography",
        "Oceanographic survey",
        "Water column sampling" .

<https://metadata.macmatlas.net/dataset/628ba84e-8d58-478c-812c-50a6dfcb2326/resource/64cfaaa9-d1c0-403e-bf90-9e0bf529170b> a dcat:Distribution ;
    dct:format "other" ;
    dct:issued "2026-06-01T01:51:29.469558"^^xsd:dateTime ;
    dct:modified "2026-06-01T01:51:29.454829"^^xsd:dateTime ;
    dct:title "CTD - Nansen" .

<https://metadata.macmatlas.net/organization/169cd6c0-3ab1-45f9-9831-ee7ff1339df8> a foaf:Organization ;
    foaf:name "Coastal and Marine Environment" .