KOSMOS mesocosm experiment Gran Canaria 2019 on testing the effect of nutrient composition (Si:N) during artificial upwelling: export flux and sinking particle properties

• Main Authors: Baumann, Moritz, Goldenberg, Silvan Urs, Taucher, Jan, Fernández-Méndez, Mar, Ortiz Cortes, Joaquin, Haussmann, Jaqueline, Riebesell, Ulf
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: AQUACOSM; artificial upwelling; Biogenic silica; flux; cumulative; flux per day; weight fraction; Canarias Sea; Carbon; organic; particulate; Carbon/Nitrogen; molar ratio; carbon dioxide removal; CDRmare; DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling; DATE/TIME; Day of experiment; DEPTH; water; experiment; diatoms; Equivalent spherical diameter; Event label; GC2019; KOSMOS; KOSMOS_2019; KOSMOS_2019_Mesocosm-M1; KOSMOS_2019_Mesocosm-M2; KOSMOS_2019_Mesocosm-M3; KOSMOS_2019_Mesocosm-M4; KOSMOS_2019_Mesocosm-M5; KOSMOS_2019_Mesocosm-M6; KOSMOS_2019_Mesocosm-M7; KOSMOS_2019_Mesocosm-M8; KOSMOS Gran Canaria; MESO; Mesocosm experiment; Mesocosm label; negative emission technology; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.956371; https://doi.org/10.1594/PANGAEA.956371

Export data from the mesocosm experiment conducted in the Canary Islands in autumn 2019. Sinking matter was collected in 2-days intervals over the course of 33 days from the mesocosm sediment traps (4 m depth). Sediment samples were processed and subsampled for duplicate measurements of particulate organic carbon (POC), nitrogen (PON), phosphorus (POP) and biogenic silica (BSi). Elemental mass fluxes in µmol L-1 were calculated by normalizing to the mesocosm volume. They were then either normalized to the time between sample collection (48 h) to obtain daily mass fluxes (µmol L-1 d-1), or added up to obtain cumulative mass fluxes (µmol L-1). Another set of sediment subsamples was analyzed for particle sinking velocities, sizes and porosities (bidaily) and microbial remineralization rates (every 4 days).