A map of the study area projected onto a MODIS image (2 January 2011) of sea ice (mottled white), glacial ice (solid white), and open water (black). ASPIRE station numbers and locations are shown in green; OSO Station 16 (from the Swedish Oden expedition in 2007–2008) is shown in yellow. Lower right inset locates the region relative to the Antarctic continent. Upper right inset shows timing of ASPIRE sampling effort relative to the 1997–2014 climatology of daily net primary production (NPP; mg C m⁻² d⁻¹; black) with interannual variability (gray) over the bloom season (October-March; modified from Arrigo et al., 2015).