Publication Abstracts

Cesana et al. 2025

Cesana, G.V., L.A. Roach, and E. Blanchard-Wrigglesworth, 2025: Clouds are crucial to capture Antarctic sea ice variability. Geophys. Res. Lett., 52, no. 3, e2024GL113322, doi:10.1029/2024GL113322.

Models from the Coupled Model Intercomparison Project phase 6 (CMIP6) typically struggle to reproduce observed Antarctic sea ice trends, a bias that is substantially alleviated when constraining winds. We use wind-nudged simulations from two CMIP models to investigate the influence of clouds on sea ice area (SIA). We find that nudging model winds in coupled simulations toward reanalysis, in addition to improving SIA variability, is crucial to reproduce realistic anomalies in cloud radiative effect (CRE) and cloud cover. Biases in the variability of cloud properties at sea ice edge?characterized by CRE anomalies?help explain the remaining discrepancies between simulated and observed SIA; a bias of 1 W/m2 in the CRE anomaly corresponds to a negative bias of 0.43 106km2 in SIA anomaly. Finally, we find that most CMIP6 models show positive trends in CRE anomaly biases, which should contribute to enhanced SIA decline, a long-standing bias in CMIP models.

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BibTeX Citation

@article{ce00300e,
  author={Cesana, G. V. and Roach, L. A. and Blanchard-Wrigglesworth, E.},
  title={Clouds are crucial to capture Antarctic sea ice variability},
  year={2025},
  journal={Geophysical Research Letters},
  volume={52},
  number={3},
  pages={e2024GL113322},
  doi={10.1029/2024GL113322},
}

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RIS Citation

TY  - JOUR
ID  - ce00300e
AU  - Cesana, G. V.
AU  - Roach, L. A.
AU  - Blanchard-Wrigglesworth, E.
PY  - 2025
TI  - Clouds are crucial to capture Antarctic sea ice variability
JA  - Geophys. Res. Lett.
JO  - Geophysical Research Letters
VL  - 52
IS  - 3
SP  - e2024GL113322
DO  - 10.1029/2024GL113322
ER  -

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