Temperature records from stations FX3 and FX4 within Faxaflói and HadISST surface temperature records. a) Measurements compiled by day of year between 1947 and 2017 from 0 m, 20 m, 50 m, and 100 m depths at the FX3 and FX4 stations. Monthly HadISST are shown for comparison by individual years (thin dashed gray lines; centered on the 15th of each month) and mean across all years (bold dashed gray line) over the same time period. b) Timeseries of 0 m, 20 m, 50 m, and 100 m temperature at FX3 and FX4 (compiled as means over fortnightly periods) and monthly HadISST (bold dashed gray line) from 2010 to 2015.