(Table S2) Contribution of formulas and elemental ratios of solid phase extracted dissolved organic matter from porewater and overlying bottom water collected during Maria S. Merian cruise MSM29 and Polarstern cruise PS85 to the Fram Strait

• Main Authors: Rossel, Pamela E, Dittmar, Thorsten
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: ABYSS; Arctic Ocean; ARK-XXVIII/2; Aromaticity index; Assessment of bacterial life and matter cycling in deep-sea surface sediments; Biological production index; Carboxyl-rich alicyclic formulas; Date/Time of event; deep sea sediment; Degradation index; Depth; bottom/max; sediment/rock; top/min; dissolved organic matter; Double bond equivalent; EGI; Elevation of event; Event label; Fourier-transform ion cyclotron mass spectrometry; Fram Strait; HAUSGARTEN 2013; HG_I; HG_II; HGI; HGIV; HGIX; HGVI; KH; Latitude of event; Light frame on-sight keyspecies investigation; LOKI; Longitude of event; Maria S. Merian; Mass spectrometer Solarix FT-ICR; Molecular lability boundary; MSM29; MSM29_424-3; MSM29_425-3; MSM29_427-2; MSM29_432-2; MSM29_439-3; MSM29_443-2; MSM29_450-2; MUC; MultiCorer; Multicorer with television; N_4; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.908706; https://doi.org/10.1594/PANGAEA.908706

Contribution of different molecular categories, H/Cwa and O/Cwa elemental ratios, aromaticity index (Aimodwa) and double bond equivalents (DBEwa) and indices of degradation (Ideg) and lability (MLBwl; Ibioprod). The contribution of each molecular category is expressed as a percentage of the total formulas in each sample obtained after normalization. Molecular formulas were additionally associated with different molecular categories because less than 6% of the DOM has been identified on a molecular level. Molecular categories are defined as follow: 1) condensed aromatics, with an AImod ≥ 0.67 (Koch and Dittmar, 2006, doi:10.1002/rcm.2386) was separated in 3 different subgroups, either <15 (condensed aromatics <15C), or ≥15 (condensed aromatics ≥15C) C atoms both without heteroatoms, or containing heteroelements (condensed aromatics-CHOx); 2) polyphenols, with an AImod >0.5 but <0.67; 3) highly unsaturated formulas, with an AImod <0.5, H/C <1.5; 4) formulas of unsaturated aliphatics, with an 1.5< H/C <2, O/C <0.9, N = 0; 5) saturated fatty acids, with an H/C >2, O/C <0.9 and with either no heteroatoms (sat. fatty acids) or with heteroatoms (sat. fatty acids-CHOx); 6) formulas of sugars, with an O/C >0.9 and with either no (sugars) or with heteroatoms (sugars-CHOx) and 7)unsaturated with N (unsaturated-N) molecular formulas, with 1.5 < H/C <2, O/C < 0.9 and N >0. Additionally, polyphenols, highly unsaturated and unsaturated aliphatics were further separated in oxygen rich (-O-rich) and oxygen poor (-O-poor) if the element ratio O/C was > 0.5 or < 0.5 respectively.