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Journal Article

Role of atmospheric resonance and land–atmosphere feedbacks as a precursor to the June 2021 Pacific Northwest Heat Dome event

Authors

Li,  Xueke
External Organizations;

Mann,  Michael E.
External Organizations;

Wehner,  Michael F.
External Organizations;

/persons/resource/Stefan.Rahmstorf

Rahmstorf,  Stefan
Potsdam Institute for Climate Impact Research;

/persons/resource/petri

Petri,  Stefan
Potsdam Institute for Climate Impact Research;

Christiansen,  Shannon
External Organizations;

Carrillo,  Judit
External Organizations;

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Fulltext (public)

29484oa.pdf
(Publisher version), 6MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Li, X., Mann, M. E., Wehner, M. F., Rahmstorf, S., Petri, S., Christiansen, S., Carrillo, J. (2024): Role of atmospheric resonance and land–atmosphere feedbacks as a precursor to the June 2021 Pacific Northwest Heat Dome event. - Proceedings of the National Academy of Sciences of the United States of America (PNAS), 121, 4, e2315330121.
https://doi.org/10.1073/pnas.2315330121


Cite as: https://publications.pik-potsdam.de/pubman/item/item_29484
Abstract
We demonstrate an indirect, rather than direct, role of quasi-resonant amplification of planetary waves in a summer weather extreme. We find that there was an interplay between a persistent, amplified large-scale atmospheric circulation state and soil moisture feedbacks as a precursor for the June 2021 Pacific Northwest “Heat Dome” event. An extended resonant planetary wave configuration prior to the event created an antecedent soil moisture deficit that amplified lower atmospheric warming through strong nonlinear soil moisture feedbacks, favoring this unprecedented heat event.