This dataset contains known preserved Last Interglacial (Eemian, Ipswichian, MIS 5e, MIS 5) sea level proxies for NW Europe: from along the shores of the English Channel and North Sea, and from their offshore areas. This V2 version includes 146 sea-level indicator data points from in and around the North Sea (35 entries in Netherlands, 10 Belgium, 23 in Germany, 17 in Denmark, 9 in Britain) and the English Channel (24 entries for the British and 25 for the French side, 3 on the Channel Isles), believed to be a representative and fairly complete inventory and assessment coming from some 80 published sites. The database also includes a modest subselection of data points from older interglacials (six sites), for comparative use. The dataset has been constructed in and has been exported from the World Atlas of Last Interglacial Shorelines (WALIS) database (https://warmcoasts.eu/world-atlas.html). The sea level proxies in majority are obtained from localities with well developed lithostratigraphic (MIS-6 aged ‘Saalian’ glaciogenic landforms and deposits as the substrate), morphostratigraphic (position in terrace flights), Amino-Acid Racemization, and biostratigraphic constraints ('Lusitanian' molluscan, foraminifera, pollen successions, other). The majority of European continental sites have chronostratigraphic age-control (regional encoding scheme included in dataset) notably by correlation to regional Pollen Association Zones with varve-count based durations (reckoned to span at least 11,000 years of temperate interglacial conditions; matching a good part of MIS 5e), and/or Foraminiferal Association Zones (echoing marine environmental and paleogeographic changes), and/or from AAR zones (majority of British sites, selected sites of mainland NW Europe; albeit for many sites older, lesser quality applications of the technique). In all regions, some of the marine deposits and bracketing terrestrial ones have also been independently dated using luminescence (IRSL, OSL, TL), U-series and ESR techniques.

From V1 to V2/V2.1 the main changes are: a) improved Upper and Lower age attributions to regional chronostratigraphic units: PAZs E1-E6 now reckoned to time within 129-112.5 ka, was 127-110 ka in V1). b) improved NW German data (Emden, Wadden Isles, Land Hadeln) based on Hoefle et al. 1985: coordinates revised, split down in SLIPs, TL and ML data points improved. The net increase from 141 to 146 data points is due to this revision. c) updated referencing, d) In V2.1 we fixed a WALIS parent database interface/export error, that for TL and ML records had affected the contents of four fields in the [Summary of RSL data points] worksheet. These fields should only have contained data for records of SLIP type, in V2 they accidently contained erroneous data and ambiguous '0' values for record of TL and ML type. The fix was to blank these fields out.