Climate of the Past
Climate of the Past
CP
Articles | Volume 20, issue 1
Articles | Volume 20, issue 1
https://doi.org/10.5194/cp-20-53-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-20-53-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 1
Research article
 | 
05 Jan 2024
Research article |  | 05 Jan 2024

A comparison of South Pacific Antarctic sea ice and atmospheric circulation reconstructions since 1900

Ryan L. Fogt, Quentin Dalaiden, and Gemma K. O'Connor

Data sets

Seasonal Antarctic Sea Ice Extent Reconstructions, 1905-2020, Version 1 R. L. Fogt et al. https://doi.org/10.7265/55X7-WE68

Antarctic Seasonal Pressure Reconstructions R. Fogt https://doi.org/10.6084/M9.FIGSHARE.C.6765447.V1

Reconstructing atmospheric circulation and sea-ice extent in the West Antarctic over the past 200 years using data assimilation Q. Dalaiden et al. https://doi.org/10.5281/ZENODO.4770178

Southern Hemisphere winds, pressure, and temperature over the 20th century from proxy-data assimilation G. K. O'Connor et al. https://doi.org/10.5281/ZENODO.5507606

20th century winds, pressure, and temperature around Antarctica from single-proxy data assimilation G. K. O'Connor et al. https://doi.org/10.5281/ZENODO.8007655

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Short summary
Antarctic sea ice is rapidly changing, with record lows set in 2017, 2022, and 2023 following decades of increase. To place these changes in a longer historical context, reconstructions have been created; however, they are quite different prior to observations. Here we find that the differences are more strongly tied to the implied connection of each reconstruction with the atmospheric circulation rather than differences in seasonality or geographic representation.
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