10.1594/PANGAEA.967043Gaye, BirgitBirgitGaye0000-0002-5057-899XLahajnar, NikoNikoLahajnarFrazão, Helena CHelena CFrazão0000-0001-5477-1802Metzke, MarcMarcMetzkePrien, Ralf DRalf DPrien0000-0003-3014-792XWaniek, Joanna JJoanna JWaniek0000-0003-3724-073XPANGAEA2024amino acidshexosaminesorganic matterSO269South China SeaSuspended matterEvent labelStation labelCruise/expeditionSample IDDEPTH, waterSuspended matter, totalδ15N, suspended particulate matterNitrogen, totalCarbon, organic, totalδ15N, nitrateδ18O, nitrateAmino acidsHexosaminesAmino acid, carbonAmino acid, nitrogenHexosamines, carbonHexosamines, nitrogenAmino acid carbon of total organic carbonAmino acid nitrogen of total nitrogenHexosamines, carbon of total organic carbonHexosamines, nitrogen of total nitrogenCysteic acidTaurineMethionine sulfoximineAspartic acidThreonineSerineGlutamic acidGlycineAlanineValineMethionineIsoleucineLeucineTyrosinePhenylalaninebeta-Alaninegamma-Aminobutyric acidHistidineTryptophanOrnithineLysineArginineGlucosamineGalactosamineAmino acids/hexosamines ratioAspartic acid/beta-Alanine ratioGlutamic acid/gamma-Aminobutyric acid ratioAmino acids non-proteinGlucosamine/Galactosamine ratioReactivity index of amino acids (Jennerjahn & Ittekkot, 1997)Degradation index of amino acids (Dauwe et al., 1999)Residence time indexSediment degradation indexCTD/RosetteMultiple opening/closing netWater pumpMass spectrometer, Finnigan, MAT 252Element analyser, Carlo Erba NA1500 after acidificationMass spectrometer Finnigan Delta Plus XPAmino acid analyser, Biochrom 30CalculatedCalculated after Jennerjahn and Ittekkot (1997)Calculated after Dauwe et al. 1999Calculated after Gaye et al. (2022)SO269Sonne_2Megacity's fingerprint in Chinese marginal seas: Investigation of pollutant fingerprints and dispersal (MEGAPOL)South China Sea Natural Laboratory under Climatic and Anthropogenic Stress (SOCLIS)2019-08-05T22:53:38/2019-08-31T01:04:44Dataset10.1029/2024JC02151910.1594/PANGAEA.9389348148 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis set of suspended matter (SPM) samples and water samples were collected in the South China Sea on the cruise of R/V SONNE 269 between August 5th and 31st 2019. The aim of this study was to better understand sources and cycling processes of SPM (i) in a region influenced by a river draining a so-called megacity and (ii) at the shelf break. Samples were analysed for total nitrogen (N) and total organic carbon carbon (TOC) using a Carlo Erba nitrogen analyser 1500 after treatment of weighed samples with 1N HCl to remove carbonate. Stable nitrogen isotopes of total particulate nitrogen (δ15N-TPN) were analysed with the mass spectrometer Thermo Finnigan MAT 252. Stable nitrogen and oxygen isotopes of nitrate (δ15N-NO3, δ18O-NO3) were analysed by the denitrifier method with a Delta Plus XP mass spectrometer. AA and HA contents and their individual monomers were analysed by liquid chromatography using a Biochrom 30 amino acid analyzer. Contents of AA and HA are presented in µmol/g and µg/g. AAC, AAN, HAC, HAN are presented in µg/g and as percentages of TOC (AAC/C, HAC/C) or TN (AAN/N, HAN/N). AA monomers are presented in mol % and comprise cysteic acid (CYA), taurine (TAU), methionine sulfoximine (MSO), aspartic acid (ASP), glutamic acid (Glu), threonine (Thr), serine (Ser), glycine (Gly), alanine (Ala), valine (Val), methionine (Met), isoleucine (Ile), leucine (Leu), tyrosine (Tyr), phenylalanine (Phe), β-Alanine (β-Ala), γ-aminobutyric acid (γ-Aba), histidine (His), tryptophane (TRP), ornithine (Orn), lysine (Lys) and arginine (Arg). HA monomers are present in mol % of total HA and comprise glucosamine (GlcN) and galactosamine (GalN). Data gaps indicate that measurements were not carried out. The RI was calculated according to Jennerjahn and Ittekkot (1997; https://archimer.ifremer.fr/doc/00093/20403/) and the DI after Dauwe et al. (1999; doi:10.4319/lo.1999.44.7.1809). Definitions of biogeochemical indicators SDI, RTI and a detailed description of the methods can be found in Gaye et al. (2022; doi.org/10.5194/bg-19-807-2022).112.06937116.8417.8671722.17262South China SeaBundesministerium für Bildung und Forschung, Bonnhttps://doi.org/10.13039/50110000234703G0269ASouth China Sea Natural Laboratory under Climatic and Anthropogenic StressBundesministerium für Bildung und Forschung, Bonnhttps://doi.org/10.13039/50110000234703G0269BSouth China Sea Natural Laboratory under Climatic and Anthropogenic StressFederal Ministry of Education and Researchhttps://doi.org/10.13039/50110000234703F0786AMegacity's fingerprint in Chinese marginal seas: Investigation of pollutant fingerprints and dispersalFederal Ministry of Education and Researchhttps://doi.org/10.13039/50110000234703F0786BMegacity's fingerprint in Chinese marginal seas: Investigation of pollutant fingerprints and dispersal