dataset for the manuscript "Global dispersal of macroalgae-derived recalcitrant DOC contributes significantly to deep ocean carbon sequestration" by Feng et. al.,

The Global Ocean DOC FT-ICR MS Dataset (GODOC-FT). GODOC-FT integrates publicly available ocean FT-ICR MS data from previously published studies (see references below) along with new data generated from DOC samples collected during our Western Pacific Ocean expedition. For consistency and comparability across datasets, we included only those studies that used solid-phase extraction of DOC from seawater using PPL cartridges. All MF naming was standardized according to the IUPAC naming system. Compound classes, molecular indices, and MIS values were calculated as described in the main manuscript. GODOC-FT dataset contains 9,117 unique MFs compiled from 1,153 seawater samples, encompassing a wide spatial and vertical range across the Atlantic and Pacific Oceans. These seawater samples were collected from depths ranging from 5 m to 5,874 m, covering the major oceanic depth zones: Surface (5–200 m), Mesopelagic (200–1,000 m), Bathypelagic (1,000–4,000 m), and Abyssopelagic (> 4,000 m) zones. The RDS file can be directly loaded into the R environment. For user accessibility, we also provide a CSV version; however, please note that it is large and may take longer to load. the code for compilation of GODOC-FT and downstream anlysis can be found at: https://github.com/ShailNair/macroalgae_molecular_contribution_to_oceanic_DOC_pool Original datasets were obtained from: 1) Bercovici, S. K., Dittmar, T. & Niggemann, J. Processes in the Surface Ocean Regulate Dissolved Organic Matter Distributions in the Deep. Global Biogeochem Cy 37, e2023GB007740 (2023). https://doi.org/10.1029/2023GB007740 2) Bercovici, S. K. et al. Aging and Molecular Changes of Dissolved Organic Matter Between Two Deep Oceanic End-Members. Global Biogeochem Cy 32, 1449-1456 (2018). https://doi.org/10.1029/2017gb005854 3) Stubbins, A. & Dittmar, T. Illuminating the deep: Molecular signatures of photochemical alteration of dissolved organic matter from North Atlantic Deep Water. Mar Chem 177, 318-324 (2015). https://doi.org/10.1016/j.marchem.2015.06.020