“…Map of dFe concentrations around the Antarctic coastline highlighting McMurdo Sound which is the largest known source of local ASD in the Ross Sea region. Data sourced from ice cores [ Edwards et al ., ; Gaspari et al ., ; Vallelonga et al ., ], aerosols [ Wagener et al ., ], modeling [ Lancelot et al ., ], snow [ Edwards and Sedwick , ; Lannuzel et al ., , ; Loscher et al ., ; van der Merwe et al ., , ; Westerlund and Öhman , ], icebergs [ Raiswell et al ., ], exposed rock (BEDMAP2), and base maps (derived from Qantarctica, Norwegian Polar Institute). Note the difference in method used to extract dFe from ice cores [ Gaspari et al ., ] and coastal snow [e.g., Lannuzel et al ., ].…”