Investigating the impact of aeolian deposition to the Southern Ocean using dissolved aluminium concentrations ...

• Main Author: Remenyi, Tomas
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Southern Ocean
• Online Access: https://dx.doi.org/10.25959/23207378; https://figshare.utas.edu.au/articles/thesis/Investigating_the_impact_of_aeolian_deposition_to_the_Southern_Ocean_using_dissolved_aluminium_concentrations/23207378

Atmospheric dust deposition (aeolian deposition) is thought to be an important source of biolimiting trace elements to the Southern Ocean (SO). Aluminium (Al) has been established as a proxy for dust deposition due to its limited role biologically, short residence times in the surface ocean and supply mechanisms to the open ocean that are typically dominated by atmospheric delivery of dust. Prior to this study, Al distributions within Australian sector of the SO had not been investigated thoroughly and atmospheric dust deposition was poorly constrained by field observations. This PhD project presents the first dissolved Al (dAl) observations in the Australian sector of the SO. These were used: to improve the understanding of Al biogeochemical cycling in the SO; as inputs to the model for the Measurement of Aluminium for Dust Calculation in Oceanic Waters (MADCOW) (Measures and Brown, 1996) to estimate aeolian deposition; to compare and assess the performance of model estimates of surface ocean dAl ...