EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Impacts of Atlantic Multi-decadal Variability on the mid-latitude atmosphere

Matthew Patterson and Tim Woollings
Matthew Patterson and Tim Woollings
  • University of Oxford, Department of Physics, United Kingdom (

The large amplitude of low-frequency sea surface temperature (SST) variability in the North Atlantic, often known as Atlantic Multi-decadal Variability (AMV), raises the question of what impact this phenomenon has on atmospheric circulation. However, the coupled nature of AMV, makes disentangling the influence of the ocean on the atmosphere and that of the atmosphere on the ocean, challenging. This problem is further confounded by the relatively short observational record, when considering decadal to multi-decadal timescales.

To address this, we utilize information from both SSTs and ocean-atmosphere turbulent heat fluxes,  in a single index, to separate the influences that the ocean and atmosphere have on one another. This technique is then applied to both free-running coupled simulations and observations. This methodology will help further our understanding of North Atlantic variability on long timescales.

How to cite: Patterson, M. and Woollings, T.: Impacts of Atlantic Multi-decadal Variability on the mid-latitude atmosphere, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-2777,, 2023.

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