Publication Abstracts
Roach et al. 2022
, E. Blanchard-Wrigglesworth, S. Ragen, W. Cheng, K.C. Armour, and C.M. Bitz, 2022: The impact of winds on AMOC in a fully-coupled climate model. Geophys. Res. Lett., 49, no. 24, e2022GL101203, doi:10.1029/2022GL101203.
Here we investigate the role of the atmospheric circulation in AMOC by comparing a fully-coupled large ensemble, a forced-ocean simulation, and new experiments using a fully-coupled global climate model where winds above the boundary layer are nudged towards reanalysis. When winds are nudged north of 45°N, agreement with RAPID array observations of AMOC at 26.5°N improves across several metrics. The phasing of interannual variability is well-captured due to the response of the local Ekman component in both wind-nudging and forced-ocean simulations, however the variance remains underestimated. The mean AMOC strength is substantially reduced relative to the fully-coupled model large ensemble, which is biased high, due to the impact of winds on surface buoyancy fluxes over the subpolar gyre. Nudging winds towards observations also reduces the 1979-2016 trend in AMOC, suggesting that improvement in the representation of the high-latitude atmosphere is important for projecting long-term AMOC changes.
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BibTeX Citation
@article{ro07810f,
author={Roach, L. A. and Blanchard-Wrigglesworth, E. and Ragen, S. and Cheng, W. and Armour, K. C. and Bitz, C. M.},
title={The impact of winds on AMOC in a fully-coupled climate model},
year={2022},
journal={Geophysical Research Letters},
volume={49},
number={24},
pages={e2022GL101203},
doi={10.1029/2022GL101203},
}
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RIS Citation
TY - JOUR ID - ro07810f AU - Roach, L. A. AU - Blanchard-Wrigglesworth, E. AU - Ragen, S. AU - Cheng, W. AU - Armour, K. C. AU - Bitz, C. M. PY - 2022 TI - The impact of winds on AMOC in a fully-coupled climate model JA - Geophys. Res. Lett. JO - Geophysical Research Letters VL - 49 IS - 24 SP - e2022GL101203 DO - 10.1029/2022GL101203 ER -
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