Reconstructing atmospheric circulation and sea-ice extent in the West Antarctic over the past 200 years using data assimilation

This archive contains the climate reconstruction of surface changes in the Antarctic over 1800–2000 CE by combing the isotope-enabled Community Earth System Model with ice core and tree-ring width records through data assimilation. For a complete description of the experimental design, see the associated publication: Dalaiden, Q., Goosse, H., Rezsohazy, J. and Thomas, E.R. (2021). Reconstructing atmospheric circulation and sea-ice extent in the West Antarctic over the past 200 years using data assimilation, Climate Dynamics. Each NetCDF file corresponds to one variable. For each variable, along with the reconstruction, an estimation of the uncertainty is provided. All fields are anomalies relative to the 1941–1990 CE period. The variables included in the archive are: ASL-index: Amundsen Sea Low index<br> BAS-SIE: Sea-ice extent averaged over the Bellingshausen and Amundsen Sea sector<br> Ross-SIE: Sea-ice extent averaged over the Ross Sea sector<br> SAM-index: Southern Annular Mode index<br> SAT: Near-surface air temperature<br> SIC: Sea-ice concentration<br> SLP: Sea-level pressure<br> SNOW-ACC: Snow accumulation<br> 500hpa-ZG: 500-hPa geopotential height<br> 500hpa-AT: 500-hPa atmospheric temperature<br> 700hpa-AT: 700-hPa atmospheric temperature<br> 850hpa-AT: 850-hPa atmospheric temperature<br> 500hpa-Uwind: 500-hPa zonal winds<br> 700hpa-Uwind: 700-hPa zonal winds<br> 850hpa-Uwind: 850-hPa zonal winds<br> 500hpa-Vwind: 500-hPa meridional winds<br> 700hpa-Vwind: 700-hPa meridional winds<br> 850hpa-Vwind: 850-hPa meridional winds Please contact Quentin Dalaiden ([e-mail]) for more information.