Fig. 2: Modern water quality measurements for Stóra Viðarvatn and Litla Viðarvatn.
From: Both redox potential and climate control molecular proxies in Icelandic Holocene lake sediments

a, b iButton temperature measurements from September 2019 to September 2020 for surface (red) and bottom water (blue) (ref. 16) and c, d Sonde dissolved oxygen concentrations (mg/L) from September 2019 (red) and February 2020 (blue) (ref. 29). See Supplementary Fig. 1 for seasonal pH and specific conductivity Sonde measurements.