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

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [1];  [1]
  1. Department of Earth &, Environmental Science, University of Pennsylvania, Philadelphia, PA 19104
  2. Applied Mathematics and Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
  3. Earth System Analysis, Potsdam Institute for Climate Impact Research, Potsdam D-14412, Germany, Institute of Physics and Astronomy, University of Potsdam, Potsdam 14476, Germany
  4. Earth System Analysis, Potsdam Institute for Climate Impact Research, Potsdam D-14412, Germany

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.

Sponsoring Organization:
USDOE
OSTI ID:
2281449
Alternate ID(s):
OSTI ID: 2433958
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 4 Vol. 121; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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