PANGAEA_990502 Dissolved organic matter from water samples during SONNE cruise SO288 Engel, Anja Dissolved organic matter from water samples during SONNE cruise SO288 2026-03-24 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.990502 Investigator Anja Engel aengel@geomar.de Earth Science Event label Sample code/label Identification DEPTH, water Zone Temperature, water Salinity Oxygen Fluorescence Turbidity Nitrate Silicate Nitrite Phosphate Nitrogen, organic, particulate Carbon, organic, particulate Carbon/Nitrogen ratio Carbon, organic, dissolved Bacteria Bacterial biomass production of carbon Bacterial biomass production of carbon Aspartic acid and Asparagine Glutamine and Glutamic acid Serine Glycine Alanine gamma-Aminobutyric acid Tyrosine Arginine Threonine Valine Isoleucine Phenylalanine Leucine Amino acids Amino acids Amino acids, dissolved hydrolyzable Aspartic acid Glutamine and Glutamic acid Serine Glycine Threonine Arginine Alanine gamma-Aminobutyric acid Tyrosine Valine Isoleucine Phenylalanine Leucine Degradation index geoscientificInformation CTD/Rosette SO288 SO288_12-1 SO288_2-2 SO288_28-1 Sonne_2 2022-01-26 2022-02-03 Complete -21.05725 -20.77627 -71.73552999999998 -70.83037000000002 25.0 m (DEPTH, water) 5000.0 m (DEPTH, water) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Sea water samples were collected during the RV SONNE cruise SO288 (15 January 2022–15 February 2022) within the framework of the HOMER project in the Southeast Pacific off Chile . At three stations, water samples were collected at 12 depths throughout the water column using standard 12 L Niskin-type bottles attached to a CTD rosette and represented the different pelagic zones: 25 m and 100 m (epipelagic), 250, 500, 750 and 1,000 m (mesopelagic), 1,500- 3800 m (bathypelagic; here different depths were sampled due to differences in bathymetry), and 4,000, 4,500 and 5,000 m (abyssopelagic). Temperature, oxygen, and pressure were measured using a Sea-Bird SBE 9-plus CTD system (Sea-Bird Electronics, Inc.), and chlorophyll a (Chl a) concentrations were detected using a WETStar fluorometer (WET Labs). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.990502"! ** PCA1 loadings used for DI calculation AsX 0,183566944 GlX 0,180226586 Ser 0,123932867 Gly -0,941383783 Thr 0,07770909 Arg 0,028766701 Ala 0,125898931 GABA 0,006081105 Tyr 0,035912614 Val 0,045953695 Iso 0,044019614 Phe 0,034636789 Leu 0,054462237

https://doi.org/10.3289/CR_SO288 SO288 https://en.wikipedia.org/wiki/Alanine Alanine https://en.wikipedia.org/wiki/Arginine Arginine https://en.wikipedia.org/wiki/Aspartic_acid Aspartic acid https://en.wikipedia.org/wiki/Gamma-aminobutyric_acid gamma-Aminobutyric acid https://en.wikipedia.org/wiki/Glycine Glycine https://en.wikipedia.org/wiki/Isoleucine Isoleucine https://en.wikipedia.org/wiki/Leucine Leucine https://en.wikipedia.org/wiki/Phenylalanine Phenylalanine https://en.wikipedia.org/wiki/Serine Serine https://en.wikipedia.org/wiki/Threonine Threonine https://en.wikipedia.org/wiki/Turbidity Turbidity https://en.wikipedia.org/wiki/Tyrosine Tyrosine https://en.wikipedia.org/wiki/Valine Valine https://uol.de/icbm/forschungsplattformen-schiffe/sonne Sonne_2 PANGAEA_987839 DIF 9.4 2026-03-24 2026-03-24