Variable export fluxes and efficiencies for calcite, opal, and organic carbon in the Atlantic Ocean:A ballast effect in action?

• Published in: Global Biogeochemical Cycles
• Main Authors: Thomalla, Sandy Jane, Poulton, Alex, Sanders, Richard, Turnewitsch, Robert, Holligan, Patrick M., Lucas, Mike
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2008
• Subjects: Geosciences; Multidisciplinary; Environmental Sciences; EMILIANIA-HUXLEYI; SEA; Meteorology & Atmospheric Sciences; DISSOLUTION; NORTH-ATLANTIC; TH-234; SOUTHERN-OCEAN; BIOGENIC SILICA; COPEPOD GUTS; IN-SITU; PHYTOPLANKTON; Southern Ocean; North Atlantic
• Online Access: https://pure.uhi.ac.uk/en/publications/8cd0d518-13a4-4ec5-aa8d-2aee24f4c754; https://doi.org/10.1029/2007GB002982

Latitudinal variability in export fluxes and efficiencies (ThE) of calcite, opal, and particulate organic carbon (POC) were examined during a basin-scale Atlantic Ocean cruise. A clear relationship between integrated euphotic zone POC and calcite export combined with similarities in average ThE for calcite (0.26), opal (0.31), and POC (0.29) implies a potential association between biomineral and POC export. However, such similarity conceals substantial uncorrelated variability when ThE values are compared on regional scales, with ThE of POC often being much higher than that of calcite or opal. High-euphotic zone ThE for POC (0.3-0.4) relative to that found in deep sea sediment traps (