Fig. 2: Compilation of temperature records for Western Svalbard over the past ca. 2,000 yr.
From: Diatom lipids open window to past ocean temperatures in the polar regions
a Alkenone-based SST records from core 9 (MSM5/5-712-1). The brown line corresponds to the \({{{\rm{U}}}}_{37}^{{{\rm{K}}}}\)-based SSTs38. The orange line corresponds to a revised \({{{\rm{U}}}}_{37}^{{{\rm{K}}}{\prime} }\)-based SST record, which excludes the C37:4 alkenone (likely from sea ice29) in the calculation and yields more realistic SSTs at the core location (The maximum modern summer SST is indicated with a black dot); b %C37:4 (alkenone) content in core 9; MSM5/5-712-1 (ref. 38); c EZ25-based SST (core 9; MSM5/5-712-1; dark blue line); GDGT-based mean air temperature (core 9; MSM5/5-712-1; purple line38); SIMMAX (foraminifera transfer function) sub-surface (50 m) temperature (core 9; MSM5/5-712-1; red line35); alkenone-based mean June-August air temperature (core 12; Kong-B; black line39); pan-Arctic 2k temperature anomaly (light grey line40). In each case, the proxy standard error is indicated with a vertical error bar symbol using the same colour as the corresponding data plot.
