Publication Date:
2024-06-19
Description:
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.
Keywords:
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 molecules; Date/Time of event; deep sea sediment; Degradation index; Depth, bottom/max; DEPTH, sediment/rock; Depth, 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; North Greenland Sea; Percentage of total formulae; Polarstern; porewater; PS85; PS85/436-1; PS85/441-1; PS85/445-1; PS85/454-3; PS85/454-4; PS85/454-5; PS85/460-4; PS85/463-1; PS85/464-1; PS85/465-4; PS85/468-1; PS85/469-2; PS85/470-3; PS85/473-3; Ratio; S_1; S_2; S_3; Sample ID; Station label; TVMUC
Type:
Dataset
Format:
text/tab-separated-values, 1804 data points
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