Orsi, Anais J.;Cornuelle, Bruce D.;Severinghaus, Jeffrey P.

Little Ice Age cold interval in West Antarctica: Evidence from borehole temperature at the West Antarctic Ice Sheet (WAIS) Divide

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.

Year AD, on the outdated WDC-6A-7 timescale

; paleoData_inferredVariableType changed - was originally year_old

MicS revised dating, NOAA National Climatic Data Center https://www.ncdc.noaa.gov/paleo/study/20246 (2016)

climateInterpretation_seasonality changed - was originally Multi-annual averages; archiveType changed - was originally ice core; climateInterpretation_seasonality changed - was originally subannual

; climateInterpretation_seasonality changed - was originally subannual

; archiveType changed - was originally ice core

Vinther, B. M.;Clausen, H. B.;Fisher, D. A.;Koerner, R. M.;Johnsen, S. J.;Andersen, K. K.;Dahl-Jensen, D.;Rasmussen, S. O.;Steffensen, J. P.;Svensson, A. M.

Synchronizing ice cores from the Renland and Agassiz ice caps to the Greenland ice core chronology

thickness (Arc_088): interpretation1_scope: '' has been replaced by 'climate'