Figure 5 | Scientific Reports

Figure 5

From: Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride

Figure 5

Relationship between simulated pCFC-12 and pSF6 in new AABW (in the region near the Cape Darnley polynya; 63°–67°S, 60°–68°E, neutral density: γn > 28.27 kg m−3, θ <  − 0.4 °C)10. Data are averaged over January–December for each year. In (a,b), data from 1980 to 2020 are used. Black and gray lines indicate the year-to-year variations in atmospheric partial pressure and winter (June–August) mean DSW (surface values at Cape Darnley polynya: ≥ 67°S, 65°–70°E), respectively. Colors denote (a) year and (b) potential temperature. (c) Year-to-year variations in the slope of the approximately straight lines based on the relationship between simulated pCFC-12 and pSF6 in new AABW (red). Dashed black lines indicate the atmospheric pSF6/pCFC-12 ratio in 2010 and 2020.

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