Dynamical connection between tropospheric blockings and stratospheric polar vortex
| dc.contributor.author | Castanheira, J. M. | |
| dc.contributor.author | Barriopedro Cepero, David | |
| dc.date.accessioned | 2023-06-20T03:38:12Z | |
| dc.date.available | 2023-06-20T03:38:12Z | |
| dc.date.issued | 2010-07-14 | |
| dc.description | © 2010 by the American Geophysical Union. | |
| dc.description.abstract | The dynamical connection between Northern Hemisphere blocking events and the variability of the stratospheric polar vortex strength is studied. The analysis is based on the composite time evolution of the energy of baroclinic planetary waves during regional blocking occurrence. During Euro-Atlantic blocking events, an in phase forcing of stationary zonal wavenumber 1 occurs. The enhanced wave amplitude is associated with a stratospheric polar vortex deceleration, which may result, at times, in Sudden Stratospheric Warming (SSW) events of displacement type. Pacific blocking composites reveal an in phase forcing of stationary zonal wavenumber 2. In most cases, the amplification of the wavenumber 2 does not reduce the vortex strength, being even accompanied by a mean vortex acceleration. However, if the amplification of wavenumber 2 is preceded by an amplification of wavenumber 1, the initial vortex deceleration forced by wavenumber 1 may be continued by wavenumber 2, and a SSW event of splitting type may occur. | |
| dc.description.department | Depto. de Física de la Tierra y Astrofísica | |
| dc.description.faculty | Fac. de Ciencias Físicas | |
| dc.description.refereed | TRUE | |
| dc.description.status | pub | |
| dc.eprint.id | https://eprints.ucm.es/id/eprint/24388 | |
| dc.identifier.doi | 10.1029/2010GL043819 | |
| dc.identifier.issn | 0094-8276 | |
| dc.identifier.officialurl | http://dx.doi.org/10.1029/2010GL043819 | |
| dc.identifier.relatedurl | http://onlinelibrary.wiley.com/ | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14352/44115 | |
| dc.journal.title | Geophysical research letters | |
| dc.language.iso | eng | |
| dc.publisher | American Geophysical Union | |
| dc.rights.accessRights | open access | |
| dc.subject.cdu | 52 | |
| dc.subject.keyword | Weather Regimes | |
| dc.subject.keyword | Warmings | |
| dc.subject.keyword | Events | |
| dc.subject.ucm | Astrofísica | |
| dc.subject.ucm | Astronomía (Física) | |
| dc.subject.ucm | Física atmosférica | |
| dc.subject.unesco | 2501 Ciencias de la Atmósfera | |
| dc.title | Dynamical connection between tropospheric blockings and stratospheric polar vortex | |
| dc.type | journal article | |
| dc.volume.number | 37 | |
| dcterms.references | Andrews, D. G., J. R. Holton, and C. B. Leovy (1987), Middle Atmosphere Dynamics, 489 pp., Academic, San Diego, Calif. Baldwin, M. P., and T. J. Dunkerton (2001), Stratospheric harbingers of anomalous weather regimes, Science, 294, 581–584. Barriopedro, D., R. García Herrera, and R. M. Trigo (2010), Application of blocking diagnosis methods to general circulation models. Part I: A novel detection scheme, Clim. Dyn., doi:10.1007/s00382-010-0767-5. Castanheira, J. M., M. L. R. Liberato, L. de la Torre, H.‐F. Graf, and C. C. DaCamara (2009), Baroclinic Rossby wave forcing and barotropic Rossby wave response to stratospheric vortex variability, J. Atmos. Sci., 66, 902–914. Charlton, A. J., and L. M. Polvani (2007), A new look at stratospheric sudden warmings. Part I. Climatology and modelling benchmarks, J. Clim., 20, 449–469. Charney, J. G., and P. G. Drazin (1961), Propagation of planetary‐scale disturbances from the lower into the upper atmosphere, J. Geophys. Res., 66, 83–109. Kalnay, E., et al. (1996), The NCEP/NCAR 40‐year reanalysis project, Bull. Am. Meteorol. Soc., 77, 437–471. Labitzke, K. (1965), On the mutual relation between stratosphere and troposphere during periods of stratospheric warmings in winter, J. Appl. Meteorol., 4, 91–99. Martius, O., L. M. Polvani, and H. C. Davies (2009), Blocking precursors to stratospheric sudden warming events, Geophys. Res. Lett., 36, L14806, doi:10.1029/2009GL038776. Polvani, L. M., and D. W. Waugh (2004), Upward wave activity flux as a precursor to extreme stratospheric events and subsequent anomalous surface weather regimes, J. Clim., 17, 3548–3554. Quiroz, R. S. (1986), The association of stratospheric warmings with tropospheric blocking, J. Geophys. Res., 91, 5277–5285. Schwierz, C., M. Croci‐Maspoli, and H. C. Davies (2004), Perspicacious indicators of atmospheric blocking, Geophys. Res. Lett., 31, L06125, doi:10.1029/2003GL019341. Taguchi, M. (2008), Is there a statistical connection between stratospheric sudden warming and tropospheric blocking events?, J. Atmos. Sci., 65, 1442–1454. Thompson, D. W. J., M. P. Baldwin, and J. M. Wallace (2002), Stratospheric connection to Northern Hemisphere wintertime weather: Implications for predictions, J. Clim., 15, 1421–1428. Uppala, M., et al. (2005), The ERA‐40 reanalysis, Q. J. R. Meteorol. Soc., 131, 2961–3012. Wang, L., W. Chen, W. Zhou, J. C. L. Chan, D. Barriopedro, and R. Huang (2009), Effect of the climate shift around mid 1970’s on the relationship between wintertime Ural blocking circulation and East Asian climate, Int. J. Climatol., 30, 153–158, doi:10.1002/joc.1876. Woollings, T., A. Charlton‐Perez, S. Ineson, A. G. Marshall, and G. Masato (2010), Associations between stratospheric variability and tropospheric blocking, J. Geophys. Res., 115, D06108, doi:10.1029/2009JD012742. | |
| dspace.entity.type | Publication | |
| relation.isAuthorOfPublication | 71d8f23d-ceaf-4f5f-8434-10a193bc3835 | |
| relation.isAuthorOfPublication.latestForDiscovery | 71d8f23d-ceaf-4f5f-8434-10a193bc3835 |
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