0 = coel.; *0 = not available.Note 1: If there was no salinity data (WOA13) available for a certain core-top location, and there was also no LDI or C32 1,15-diol fractional abundance value for this core-top, then we have not adopted data from nearby grids.Note 2: If there was no SST data (WOA13) available for a certain core-top location, and there was also no LDI value for this core-top, then we have not adopted data from nearby grids.Note 3: If there was no seasonal SST or nutrient data available for a certain core-top location from WOA13, and this core-top was not included in the final LDI calibration, then we have not adopted data from nearby grids.Note 4: The fractional abundances of a few core-tops from the Iberian margin do not sum up to exactly 1, this is because in the original paper (de Bar et al., 2016) the core-tops were analyzed two to three times, and the fractional abundances were averaged.Note 4: The fractional abundances of a few core-tops from the "Rampen et al., 2012" reference do not sum up to exactly 1, because the original data was not available, and thus the reported data from Rampen et al. (2012) was used which are rounded to two decimal places.Note 5: Long chain diols marked as "n.a." or "coel." (=co-elutes) were treated as zero for calculating the final fractional abundances. In case one of the LDI or Diol Index diols was marked as "n.a." or "coel.", the LDI or Diol Index was not calculated.Note 6: For certain samples fractional abundances are given but not the LDI (mainly in Arctic and Antarctic), as the relative LDI diol abundances were considered too low for index calculation.Note that the number of decimals shown here is different from the original dataset, i.e. the dataset in the supplements of the article.