Nutrient release from dry and wet Saharan dust deposition ...

• Main Author: Korte, Laura F
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Event label; DEPTH, water; Day of experiment; Comment; Experimental treatment; Phosphate; Phosphate, standard deviation; Silicate; Silicate, standard deviation; Nitrate; Nitrate, standard deviation; Iron, dissolved; Iron, dissolved, standard deviation; Carbon, organic, particulate; Carbon, organic, particulate, standard deviation; Synechococcus spp.; Synechococcus spp., standard deviation; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; Phytoplankton, pico eukaryotic; Phytoplankton, pico eukaryotic, standard deviation; Incubation; TRAACS Gas Segmented Continuous Flow Analyser; Flow injection analysis; Thermo-Interscience Flash EA112 Series NC analyzer; Flow cytometry Accuri C6; Continuous flow analysis, after Stoll et al. 2001; JC134; James Cook; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.898138; https://doi.pangaea.de/10.1594/PANGAEA.898138

Dry and wet Saharan dust deposition incubation experiments were conducted in the tropical North Atlantic Ocean at 12°N to study the nutrient release of Saharan dust under oligotrophic seawater conditions with possible fertilization effects on the phytoplankton. Low and high amounts of Saharan dust deposition from two different dust sources (paleo-lake and sand dune) were used from which the dust's particle sizes were adjusted to resemble dust that is naturally deposited over the ocean at the experiment sites. For wet dust deposition, the dust was pre-leached in acidified 'artificial rainwater' (H2SO4) for 16 to 24 hours, mimicking acid cloud processing at different pH values. Experiments were run up to eight days. Daily nutrient measurements of phosphate (PO43-), silicate (SiO44-), nitrate (NO3-) and cell abundances were performed in addition to measurements of concentrations of total dissolved iron (DFe) and particulate organic carbon (POC) at the start and at the end of the experiments. A significant ...