The phrase "austral winter" refers to the winter season in the Southern Hemisphere. It is the coldest time of the year in countries like Australia, South Africa, and Argentina. Full definition
Extreme cold can prevent aircraft from operating, and could maroon the team at the station during the total darkness and bitter temperatures of austral winter. (scientificamerican.com)
Matthewman, N. J., and G. Magnusdottir, 2012: Clarifying ambiguity in intraseasonal Southern Hemisphere climate modes during austral winter. (sites.uci.edu)
Physician Alexander Kumar and Erick Bondoux, two residents passing austral winter at Concordia, snapped this photo of the dramatic aurorae over the station on July 18. (scientificamerican.com)