Publication Abstracts

Xu et al. 2025

Xu, X., T. Martin, R.L. Beadling, J. Liu, S. Bischof, T. Hattermann, W. Huo, Q. Li, J.C. Marshall, M. Muilwijk, A.G. Pauling, A. Purich, I.J. Smith, N.C. Swart, and M. Thomas, 2025: Robustness and mechanisms of the atmospheric response over the Southern Ocean to idealized freshwater input around Antarctica. Geophys. Res. Lett., 52, no. 10, e2024GL113734, doi:10.1029/2024GL113734.

Enhanced Antarctic ice sheet mass loss yields ocean surface freshening, cooling and sea ice expansion, which result in changes in the atmospheric conditions. Using the Southern Ocean Freshwater Input from Antarctica (SOFIA) multi-model ensemble, we study the atmospheric response to a 100-year idealized freshwater release of 0.1 Sv. All models simulate a surface-intensified tropospheric cooling and lower-stratospheric warming south of 35°S. Tropospheric cooling is attributed to sea ice expansion and the associated albedo enhancement in winter and a colder sea surface in summer. This cooling yields a downward displacement of the tropopause, reduced stratospheric water vapor content and ultimately warming around 200 hPa. An enhanced southward eddy heat flux explains warming at 10-100 hPa during austral winter. Despite a temporally (and spatially) uniform prescribed freshwater flux, a prominent sea ice seasonal cycle and atmosphere dynamics result in a distinct seasonal pattern in the occurrence and magnitude of the temperature responses.

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BibTeX Citation

@article{xu09000j,
  author={Xu, X. and Martin, T. and Beadling, R. L. and Liu, J. and Bischof, S. and Hattermann, T. and Huo, W. and Li, Q. and Marshall, J. C. and Muilwijk, M. and Pauling, A. G. and Purich, A. and Smith, I. J. and Swart, N. C. and Thomas, M.},
  title={Robustness and mechanisms of the atmospheric response over the Southern Ocean to idealized freshwater input around Antarctica},
  year={2025},
  journal={Geophysical Research Letters},
  volume={52},
  number={10},
  pages={e2024GL113734},
  doi={10.1029/2024GL113734},
}

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RIS Citation

TY  - JOUR
ID  - xu09000j
AU  - Xu, X.
AU  - Martin, T.
AU  - Beadling, R. L.
AU  - Liu, J.
AU  - Bischof, S.
AU  - Hattermann, T.
AU  - Huo, W.
AU  - Li, Q.
AU  - Marshall, J. C.
AU  - Muilwijk, M.
AU  - Pauling, A. G.
AU  - Purich, A.
AU  - Smith, I. J.
AU  - Swart, N. C.
AU  - Thomas, M.
PY  - 2025
TI  - Robustness and mechanisms of the atmospheric response over the Southern Ocean to idealized freshwater input around Antarctica
JA  - Geophys. Res. Lett.
JO  - Geophysical Research Letters
VL  - 52
IS  - 10
SP  - e2024GL113734
DO  - 10.1029/2024GL113734
ER  -

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