The new hydrographical set was generated mostly thanks to extractions obtained from the World Ocean Atlas 2013 (WOA13; https://www.nodc.noaa.gov/OC5/woa13/woa13data.html, accessed on 20 September 2018). These **data** permit reconstructing quantified past SSTs and salinities at two depths, i.e., 0 and 50 m, to infer thermocline migration for means calculated monthly, seasonally (according to the astronomical definition of seasons [26]), or annually. In this study, we performed calculations for the whole set of new parameters; however, here, we only report annual, winter (i.e., January-February-March) and summer (i.e., July-August-September) means, together with seasonal extremes (i.e., the warmest, August, and the coldest, February, month of the year). The derived errors (root mean square error of prediction (RMSEP)) calculated for each reconstructed parameter were a maximum of 1.4 °C, for temperatures, and of 0.7 psu, for salinities (in August, at 0 m); these maximal error values are plotted on graphs hereafter. Reconstructions of sea-surface dissolved oxygen (do), phosphate and nitrate concentrations were also obtained thanks to our new WOA13 extractions, but only do is here presented (with an RMSEP of 0.1 mL/L on past reconstructions). Their significance as key ecological parameters of the North hemisphere marine planktonic fossil populations was tested with the updated dinocyst transfer function published in 2020 (see [16] for details, especially for multivariate analysis). Sea-ice cover (SIC) data, compiled at a ¼-degree resolution from the NSIDC website (http://nsidc.org/data/G10010, 20 September 2021, see [16]), are now also updated in the database. They are expressed in two ways and conform strictly to the extractions conducted for dinocysts [16] in order to provide comparable past quantified reconstructions; SIC **data** are expressed as SIC mean monthly concentrations (coverage percentages from 0 to 100%; in this article, only February means are shown, with an RMSEP of 10%) and SIC duration (number of months/year with sea-ice concentration >50%, with an RMSEP of 1.5 month/year).