Iron in modern and ancient East Antarctic snow : implications for phytoplankton production in the Southern Ocean ...

• Main Author: Edwards, Ross
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; D'Urville Sea; Dumont d'Urville; Dumont-d'Urville; East Antarctica; Law Dome; Princess Elizabeth Land; Prydz Bay; Ross Sea; Southern Ocean; Wilkes Land; Antarc*; Antarctica; Dumont D'Urville Sea; ice core
• Online Access: https://dx.doi.org/10.25959/23234063.v1; https://figshare.utas.edu.au/articles/thesis/Iron_in_modern_and_ancient_East_Antarctic_snow_implications_for_phytoplankton_production_in_the_Southern_Ocean/23234063/1

lion (Fe) was measured in present-day and ancient East Antarctic snow to investigate the atmospheric flux of Fe into the Southern Ocean, the solubility of this atmospheric iron, and the level of new phytoplankton production it could support in Southern Ocean waters, given that iron is an essential micronutrient for algal growth. To investigate the present-day atmospheric Fe deposition, acid-soluble total-dissolvable Fe (TD-Fe) was measured in present-day East Antarctic snow from inland sites in Princess Elizabeth Land and marine sites in Prydz Bay, the Dumont d'Urville Sea and the Ross Sea. To investigate temporal variations in atmospheric Fe deposition, TD-Fe concentrations were measured in glacial ice-core (i.e., ancient snow) samples of Holocene, Wisconsin-Holocene transition and Last Glacial Maximum (LGM) age from Law Dome on the coast of Wilkes Land, East Antarctica. Average TD-Fe concentrations in modern snow from Prydz Bay, Princess Elizabeth Land and the Ross Sea were similar, with a range of 612-749 ...