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North Pacific zonal wind response to sea ice loss in the Polar Amplification Model Intercomparison Project and its downstream implications

https://doi.org/10.1007/s00382-020-05352-w

Ronalds, Bryn ; Barnes, Elizabeth A. ; Eade, Rosie ; Peings, Yannick ; Sigmond, Michael ( October 2020 , Climate Dynamics)
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Opposite Responses of the Dry and Moist Eddy Heat Transport Into the Arctic in the PAMIP Experiments

https://doi.org/10.1029/2020GL089990

Audette, Alexandre ; Fajber, Robert A. ; Kushner, Paul J. ; Wu, Yutian ; Peings, Yannick ; Magnusdottir, Gudrun ; Eade, Rosie ; Sigmond, Michael ; Sun, Lantao ( May 2021 , Geophysical Research Letters)

Abstract
Given uncertainty in the processes involved in polar amplification, elucidating the role of poleward heat and moisture transport is crucial. The Polar Amplification Model Intercomparison Project (PAMIP) permits robust separation of the effects of sea ice loss from sea surface warming under climate change. We utilize a moist isentropic circulation framework that accounts for moisture transport, condensation, and eddy transport, in order to analyze the circulation connecting the mid‐latitudes and the Arctic. In PAMIP's atmospheric general circulation model experiments, prescribed sea ice loss reduces poleward heat transport (PHT) by warming the returning moist isentropic circulation at high latitudes, while prescribed warming of the ocean surface increases PHT by strengthening the moist isentropic circulation. Inter‐model spread of PHT into the Arctic reflects the tug‐of‐war between sea‐ice and surface‐warming effects.

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