Fig. 4: Schematic of major phases of ice-driven carbon uptake in the Southeast Pacific over the last glacial cycle. | Nature Geoscience

Fig. 4: Schematic of major phases of ice-driven carbon uptake in the Southeast Pacific over the last glacial cycle.

From: South Pacific carbon uptake controlled by West Antarctic Ice Sheet dynamics

Fig. 4: Schematic of major phases of ice-driven carbon uptake in the Southeast Pacific over the last glacial cycle.

a,c,e,g, Overview maps of modern70,71 and modelled past Antarctic ice-sheet extent53,54 for present (a), marine isotope stage (MIS) 5e (c), late MIS5 (e) and the Last Glacial Maximum (g). Iceberg drift paths are indicated by white arrows38,39,40. Ice shelves in the model results are indicated in light grey. Note that different parameterization of this ice-sheet model can produce a much stronger retreat of grounded ice in the Ross Ice Shelf region for MIS5e55. b,d,f,h, Simplified transects summarizing location, magnitude and impact of IRD in the South Pacific AZ for the respective time intervals, in comparison with concurrent dust-dominated Fe fertilization in the SAZ. Red filled circles show the location of site PS58/270. Dust plumes are indicated in brown. Blue arrows indicate Southern Ocean upwelling and water mass transformation. WAIS, West Antarctic Ice Sheet; PIG, Pine Island Glacier; TG, Thwaites Glacier; SWW, Southern Westerly Winds; Corg, organic carbon. Base maps were produced with Ocean Data View.

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