Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Stratospheric polar vortex, wave absorption/reflection and effect on surface climate
Stockholm University, Faculty of Science, Department of Meteorology . Stockholm University, Faculty of Science, The Bolin Centre for Climate Research (together with KTH & SMHI).ORCID iD: 0000-0002-8255-5186
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology . Stockholm University, Faculty of Science, The Bolin Centre for Climate Research (together with KTH & SMHI).ORCID iD: 0000-0002-3636-9622
Number of Authors: 42025 (English)In: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894, Vol. 63, no 2, article id 126Article in journal (Refereed) Published
Abstract [en]

The study of the stratosphere-troposphere interaction is important as it can contribute to boosting predictability in the subseasonal-to-seasonal timescale, particularly regarding extremes. This manuscript investigates the relationship between the stratospheric polar vortex and its sudden stratospheric warming and the troposphere in regard to the reflective and absorptive states of the vortex. We explore the eddy heat flux in relation to vertical wave propagation and sudden stratospheric warming, in addition to using the reflective index for comparison and checking. To find reflective and absorptive vortex regime and associated tropospheric flow, the analysis is complemented by clustering analysis. Using northern winter stratospheric and mid-tropospheric Reanalysis heights as well as sea level pressure and 2 m-temperature, absorptive and reflective states are identified and their coherent structures investigated in relation to the vortex state and surface climate. While the reflective index is not consistent with the eddy heat flux on the classification, the absorptive type for both methods consistently trigger a response in the annular mode with a negative Arctic Oscillation imprint. It also exhibits longer lasting wave propagation, compared to reflective types, suggesting sustained disruption of the circulation and occurrence of blocking. The clustering analysis reveals specific characteristics within vortex states affecting wave propagation. Precisely, weak and displaced or split vortex over the eastern hemisphere is associated with absorptive type, and yields more persistence, compared to the reflective type, associated with strong or quite weak vortex and also displaced vortex over North America. Effect on the surface climate are also discussed.

Place, publisher, year, edition, pages
2025. Vol. 63, no 2, article id 126
Keywords [en]
Absorptive and reflective waves, Clustering, Stratospheric polar vortex, Surface extremes
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:su:diva-242136DOI: 10.1007/s00382-025-07610-1ISI: 001424591700003Scopus ID: 2-s2.0-85218502761OAI: oai:DiVA.org:su-242136DiVA, id: diva2:1952048
Available from: 2025-04-14 Created: 2025-04-14 Last updated: 2025-04-14Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Hannachi, AbdelFinke, Kathrin

Search in DiVA

By author/editor
Hannachi, AbdelFinke, Kathrin
By organisation
Department of Meteorology The Bolin Centre for Climate Research (together with KTH & SMHI)
In the same journal
Climate Dynamics
Meteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 13 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf