Extended Data Fig. 4: Antarctic Zone opal flux data from different sectors of the Southern Ocean.
From: Millennial and centennial CO2 release from the Southern Ocean during the last deglaciation
As can be seen, opal fluxes differ in absolute values (for example, much higher deglacial fluxes in the Atlantic sector core 13PC than in other cores) and patterns (for example, a substantial decline in the Atlantic core 13PC during Bølling/Allerød, which is not seen in other cores; sustained opal flux increase in PS75/072-4 during the Holocene, but not seen in other cores). These different patterns may reflect varying hydrological conditions between different sectors of the Southern Ocean. This warrants the use of additional proxies to check palaeoceanographic inferences based on opal fluxes. Opal flux data are from refs. 2,4,100. Literature data are plotted against their originally published age models.
