Fig. 2: Stratigraphic diagram of diatoms from Marion Island. | Communications Earth & Environment

Fig. 2: Stratigraphic diagram of diatoms from Marion Island.

From: Southward migration of the Southern Hemisphere westerly winds corresponds with warming climate over centennial timescales

Fig. 2

Stratigraphic diagram of the relative frequency (%) of the 6 most abundant diatom taxa, the principal components analysis first and second axes (PC1 and PC2), and the diatom-inferred conductivity (log mS cm−1) and μ-XRF-scanning PC1 results from Marion Island. Biostratigraphic zone III (1300–1450 CE) is marked by the presence of soil- and moss-associated diatoms with a high salinity tolerance, a high PC2, DI-conductivity, and more minerogenic material. Zone II (1450–1920 CE) is defined by a shift to diatoms indicative of higher water levels and lower conductivity as well as lower PC2 and minerogenic material. Zone I (1920 CE-present) shows a shift towards species with higher salinity tolerances, higher PC2 and diatom-inferred conductivity. (Note that scanning-based geochemical data is only available below 10 cm).

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