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- LPD775e8bad.year old + (The timescale for the Common Era of WDC06A … The timescale for the Common Era of WDC06A was recently revised. The former timescale (“WDC06A-7”, Sigl et al., 2013) was based on manually interpreting annual-layers with multi-parameter aerosol records and was used in PAGES 2k Consortium (2013). This timescale is now replaced by a timescale (“WD2014”) based on the same aerosol datasets, but interpreted with an objective layer-counting algorithm and constrained with a distinctive, global-scale, marker horizon in 775 AD detected by annual 10Be ice-core measurements (see additional details in Sigl et al., 2015). During the first millennium WD2014 differs from WDC06A-7 by on average 7 years (maximum of 9 years), with the revised timescale giving always younger ages. The time period 1258 AD to present is identical for both timescales. WD2014 is considered more accurate than WDC06A-7 (Sigl et al., 2015), and is the recommended timescale, but both timescales are reported in the PAGES2k database Ant_031 and Ant_031WD2014.AGES2k database Ant_031 and Ant_031WD2014.)
