Change search
ReferencesLink to record
Permanent link

Direct link
On double Rossby wave breaking in the North Atlantic
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
2015 (English)In: Journal of Geophysical Research - Atmospheres, ISSN 2169-897X, E-ISSN 2169-8996, Vol. 120, no 21, 11129-11150 p.Article in journal (Refereed) Published
Abstract [en]

We discuss the dynamical features associated with double Rossby wave breaking (DWB, concurrent cyclonic and anticyclonic breakings) over the North Atlantic, with a focus on the North Atlantic Oscillation (NAO), the midlatitude jet stream, and surface wind extremes over continental Europe. Objective automated algorithms for detecting wave breaking and determining the location, intensity, and direction of the jet are adopted. The analysis is performed on the European Centre for Medium-Range Weather Forecasts ERA-Interim reanalysis and the Max Planck Institute Earth System Model (MPI-ESM). We find that DWB events can project onto both phases of the NAO, albeit showing no strong preference for either. Wave-breaking pairs occurring in the northern North Atlantic project onto the positive NAO, while the opposite holds for pairs occurring farther south. DWB also affects the direction and intensity of the jet stream. Events in the eastern half of the basin (EWB) intensify and zonalize the jet, while events farther to the west (WWB) weaken the westerly flow over Europe. An analysis of destructive wind storms over Europe in the last three decades suggests that these are typically associated with a very intense, zonal jet-similar to the case of EWB. Indeed, EWB corresponds to an enhanced likelihood of destructive windstorms over the continent, although there is not a one-to-one correspondence. The MPI-ESMmodel does not capture this statistical relationship. On the contrary, WWB corresponds to a decreased likelihood of destructive weather.

Place, publisher, year, edition, pages
2015. Vol. 120, no 21, 11129-11150 p.
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-124495DOI: 10.1002/2015JD023854ISI: 000367823600006OAI: diva2:889339
Available from: 2015-12-23 Created: 2015-12-23 Last updated: 2016-04-19Bibliographically approved

Open Access in DiVA

fulltext(3505 kB)6 downloads
File information
File name FULLTEXT01.pdfFile size 3505 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Messori, GabrieleCaballero, Rodrigo
By organisation
Department of Meteorology
In the same journal
Journal of Geophysical Research - Atmospheres
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 6 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 172 hits
ReferencesLink to record
Permanent link

Direct link