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. 2021 Aug 16;12:4948. doi: 10.1038/s41467-021-25235-w

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© The Author(s) 2021

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Fig. 2 — January averaged sea-ice concentrations derived from passive microwave satellite measurements (top). Red contours represent the biologically relevant ‘ice-edge’ defined as an ice concentration threshold of 5%. Underway estimates of NCP using O₂/Ar method from the annual PAL-LTER sampling cruises along the WAP grids (bottom).