Articles | Volume 17, issue 12
https://doi.org/10.5194/tc-17-5373-2023
https://doi.org/10.5194/tc-17-5373-2023
Research article
 | 
18 Dec 2023
Research article |  | 18 Dec 2023

Control of the temperature signal in Antarctic proxies by snowfall dynamics

Aymeric P. M. Servettaz, Cécile Agosta, Christoph Kittel, and Anaïs J. Orsi

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Cited articles

Abram, N. J., Mulvaney, R., Vimeux, F., Phipps, S. J., Turner, J., and England, M. H.: Evolution of the Southern Annular Mode during the past millennium, Nat. Clim. Change, 4, 564–569, https://doi.org/10.1038/nclimate2235, 2014. 
Agosta, C., Amory, C., Kittel, C., Orsi, A., Favier, V., Gallée, H., van den Broeke, M. R., Lenaerts, J. T. M., van Wessem, J. M., van de Berg, W. J., and Fettweis, X.: Estimation of the Antarctic surface mass balance using the regional climate model MAR (1979–2015) and identification of dominant processes, The Cryosphere, 13, 281–296, https://doi.org/10.5194/tc-13-281-2019, 2019. 
Agosta, C., Servettaz, A. P. M., Kittel, C., and Orsi, A. J.: MARv312-albCor105-spinup6_daily (MARv312-albCor105-spinup6-upload1), Zenodo [data set], https://doi.org/10.5281/zenodo.8408864 (last updated: October 2023), 2023. 
Antwerpen, R. M., Tedesco, M., Fettweis, X., Alexander, P., and van de Berg, W. J.: Assessing bare-ice albedo simulated by MAR over the Greenland ice sheet (2000–2021) and implications for meltwater production estimates, The Cryosphere, 16, 4185–4199, https://doi.org/10.5194/tc-16-4185-2022, 2022. 
Argentini, S., Pietroni, I., Mastrantonio, G., Viola, A. P., Dargaud, G., and Petenko, I.: Observations of near surface wind speed, temperature and radiative budget at Dome C, Antarctic Plateau during 2005, Antarct. Sci., 26, 104–112, https://doi.org/10.1017/S0954102013000382, 2014. 
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Short summary
It has been previously observed in polar regions that the atmospheric temperature is warmer during precipitation events. Here, we use a regional atmospheric model to quantify the temperature changes associated with snowfall events across Antarctica. We show that more intense snowfall is statistically associated with a warmer temperature anomaly compared to the seasonal average, with the largest anomalies seen in winter. This bias may affect water isotopes in ice cores deposited during snowfall.
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