Publication Abstracts

Doddridge et al. 2019

Doddridge, E.W., J. Marshall, H. Song, J. Campin, M. Kelley, and L. Nazarenko, 2019: Eddy compensation dampens Southern Ocean sea surface temperature response to westerly wind trends. Geophys. Res. Lett., 46, no. 8, 4365-4377, doi:10.1029/2019GL082758.

Anthropogenic influences have led to a strengthening and poleward shift of westerly winds over the Southern Ocean (SO), especially during austral summer. We use observations, an idealized eddy-resolving ocean-sea ice channel model, and a global coupled model to explore the SO response to a step-change in westerly winds. Previous work hypothesized a two timescale response for sea surface temperature. Initially, Ekman transport cools the surface before sustained upwelling causes warming on decadal timescales. The fast response is robust across our models and the observations: we find Ekman-driven cooling in the mixed layer, mixing-driven warming below the mixed layer, and a small upwelling-driven warming at the temperature inversion. The long-term response is inaccessible from observations. Neither of our models shows a persistent upwelling anomaly, or long-term, upwelling-driven subsurface warming. Mesoscale eddies act to oppose the anomalous wind-driven upwelling, through a process known as eddy compensation, thereby preventing long-term warming.

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BibTeX Citation

@article{do08200c,
  author={Doddridge, E. W. and Marshall, J. and Song, H. and Campin, J. and Kelley, M. and Nazarenko, L.},
  title={Eddy compensation dampens Southern Ocean sea surface temperature response to westerly wind trends},
  year={2019},
  journal={Geophys. Res. Lett.},
  volume={46},
  number={8},
  pages={4365--4377},
  doi={10.1029/2019GL082758},
}

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RIS Citation

TY  - JOUR
ID  - do08200c
AU  - Doddridge, E. W.
AU  - Marshall, J.
AU  - Song, H.
AU  - Campin, J.
AU  - Kelley, M.
AU  - Nazarenko, L.
PY  - 2019
TI  - Eddy compensation dampens Southern Ocean sea surface temperature response to westerly wind trends
JA  - Geophys. Res. Lett.
VL  - 46
IS  - 8
SP  - 4365
EP  - 4377
DO  - 10.1029/2019GL082758
ER  -

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