Table 1. Circumpolar datasets used within the classification.

Data	Spatial resolution	Temporal resolution	Source
Depth	1minute	Not applicable	Smith and Sandwell, [118]
Geomorphology	1–12 km	Not applicable	O’Brien et al. [64]
Seafloor temperature	1 degree	Annual mean over allyears available in the WorldOcean Atlas 2005 [127]	Clarke et al. [27]
Sea surface chlorophyll-a	9 km	Mean values for each australsummer season (20th Dec to 20th March)for years 1998–2010	Feldman and McClain, [128]
Sea ice concentration	6.25 km	The proportion of the year where sea ice concentration was atleast 85% derived from daily estimates during the1st January 2003 to 31st December 2009	Spreen et al. [129]
Frontal systems	20 km	Annual mean calculated across 1992–2007	Sokolov and Rintoul, [130]