This PDF file includes:

• Fig. S1. Transports of the layer-wise carbon anomaly in CDW.
• Fig. S2. Carbon partitioning in the Weddell Gyre.
• Fig. S3. CFC-11 in the Weddell Gyre.
• Fig. S4. Carbon and carbon partitioning in the Ross Sea.
• Fig. S5. Salinity-alkalinity relationship in the Weddell Gyre surface ocean.

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