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. © 2024 the Author(s).
| Original language | English |
|---|---|
| Article number | e2315330121 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 121 |
| Issue number | 4 |
| Online published | 16 Jan 2024 |
| DOIs | |
| Publication status | Published - 23 Jan 2024 |
| Externally published | Yes |
Funding
ACKNOWLEDGMENTS. This work was supported (X.L., M.E.M., S.C., and J.C.) by funding from the School of Arts and Sciences of the University of Pennsylvania. M.F.W. was supported by the Director, Office of Science, Office of Biological and Environmental Research of the U.S. Department of Energy under Contract No. DE340AC02-05CH11231 under the Regional and Global Model Analysis program.
Research Keywords
- atmospheric dynamics
- climate change
- heatwave
- planetary waves
- soil moisture
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
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