To validate the robustness of the calculations regarding past periods, reconstructions derived from the study of four marine cores (mapped in Figure 1), which were already published on the basis of the MAT transfer function (Table 1), were run for this new set of oceanic data. This set of cores embraces a modern SST range of 8 °C along the western European margin (from warm temperate (40° N) to subpolar environments (63° N)). We also tested the coherency of the reconstructions with other proxies; the newly produced quantified **data** were then compared to existing ones derived from other bioindicators (dinocysts especially) when possible. The age models of the compiled sequences were not modified, and they all conform to the last ones published (see references in Table 1). 