Reconstructing Arctic Sea Ice over the Common Era Using Data Assimilation

The following data contain reconstructions of Arctic sea ice and temperature during the Common Era (0-1999 CE). These reconstructions were produced using data assimilation of climate model output and temperature-sensistive proxy records. Prior ensembles were drawn from climate model output from both the Community Climate System Model version 4 (CCSM4, Last Millennium simulation Landrum et al., 2013) and Max Planck Institute for Meteorology (MPI-ESM-P, Last Millennium simulation Jungclaus et al. (2010)). Temperature-sensitive proxy records were taken from Pages2kv2 database (Emile-Geay et al. 2017). Included are separate files which include: perfect model pseudo proxy experiment reconstructions, imperfect model pseudo proxy experiment reconstructions, fixed proxy reconstructions from 1200-1970 CE, two full reconstructions using two model priors from 0-1999 CE, and a list years of large volcanic eruptions used for composite analysis. These reconstructions correspond with work published in Brennan et al. (2021). 

Brennan, M. K. and Hakim, G. J. (2021). Reconstructing Arctic Sea Ice Over the Common Era Using Data Assimilation. Journal of Climate. https://doi.org/10.1175/JCLI-D-21-0099.1