Artículo

La versión final de este artículo es de uso interno. El editor solo permite incluir en el repositorio el artículo en su versión post-print. Por favor, si usted la posee enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The influence of the intraseasonal variability on heat wave development over subtropical South America during austral summer is analyzed. The role of the South Atlantic Convergence Zone (SACZ) on this development is documented. Results show that intraseasonal variability can explain on average at least 32% of summer temperature variance. Moreover, 73% of the heat waves in subtropical South America develop in association with an active SACZ. The analysis of pentad maps shows that warm conditions in the region under study develop in association with the strengthening of an anticyclonic anomaly, which is discernible over the subtropical regions at least 15 days before temperature peak occurrence. That circulation anomaly is embedded in a large-scale Rossby wave train extending along the South Pacific Ocean that is linked to convection anomalies at the equatorial western and central Pacific Ocean. In addition, the development of the anticyclonic circulation over subtropical South America appears to be strengthened by the subsidence conditions promoted by the active SACZ, which result in temperature rise in the subtropical region under relatively dry conditions. On the other hand, during the last 2 days of evolution, SACZ activity weakens and the progressive temperature rise in the region is dominated by warmer and moister air being anomalously advected from the north. Results confirm the important role that SACZ activity on intraseasonal time scales has in inducing persistent circulation anomalies at the subtropical regions that can result in the development of persistent heat waves, and very extreme daily temperature. © 2010 Springer-Verlag.

Registro:

Documento: Artículo
Título:Influence of the intraseasonal variability on heat waves in subtropical South America
Autor:Cerne, S.B.; Vera, C.S.
Filiación:Departamento de Ciencias de la Atmósfera y los Océanos, FCEyN, Centro de Investigaciones del Mar y la Atmósfera (Conicet-UBA), Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Heat waves; Intraseasonal variability; SACZ; South America; Temperature; Warm season; air temperature; anticyclone; atmospheric circulation; atmospheric wave; regional climate; Rossby wave; seasonal variation; summer; warming; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (Equatorial); Pacific Ocean (South); South America
Año:2011
Volumen:36
Número:11-12
Página de inicio:2265
Página de fin:2277
DOI: http://dx.doi.org/10.1007/s00382-010-0812-4
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v36_n11-12_p2265_Cerne

Referencias:

  • Alessandro, A.P., de Garín, A.B., A study on predictability of human physiological strain in Buenos Aires City (2003) Meteorol Appl, 10, pp. 263-271
  • Campetella, C., Rusticucci, M., Synoptic analysis of an extreme heat wave over Argentina in March 1980 (1998) Meteorol Appl, 5, pp. 217-226
  • Cassou, L., Terray, L., Phillips, A., Tropical Atlantic influence on European heat waves (2005) J Clim, 18, pp. 2805-2811
  • Cerne, S.B., Vera, C.S., Liebmann, B., The nature of a heat wave in eastern Argentina occurring during SALLJEX (2007) Mon Wea Rev, 135, pp. 1165-1174
  • Duchon, C.E., Lanczos filterining one and two dimensions (1979) J App Meteorol, 18, pp. 1016-1022
  • Feudale, L., Shukla, J., Influence of sea surface temperature on the European heat wave of 2003 summer. Part I: an observational study (2010) Clim Dyn., , doi: 10. 1007/s00382-010-0788-0
  • Feudale, L., Shukla, J., Influence of sea surface temperature on the European heat wave of 2003 summer. Part II: a modeling study (2010) Clim Dyn., , doi: 10. 1007/s00382-010-0789-z
  • Gandu, A.W., Silva Dias, P.L., Impact of tropical heat sources on the South American tropospheric upper circulation and subsidence (1998) J Geophys Res, 103, pp. 6001-6015
  • Gonzalez, P.M., Vera, S.C., Liebmann, B., Kiladis, G., Intraseasonal variability in subtropical South America as depicted by precipitation data (2008) Clim Dyn, 30, pp. 727-744
  • Grimm, A.M., Silva Dias, P.L., Analisis if tropical-extratropical interactions with influence functions of a barotropic model (1995) J Atmos Sci, 52 (20), pp. 3538-3555
  • Jones, C., Waliser, D.E., Gautier, C., The influence of the Madden-Julian Oscillation on ocean surface heat fluxes and sea surface temperature (1998) J Clim, 11, pp. 1057-1072
  • Kalnay, E., The NCEP/NCAR 40-year reanalysis project (1996) Bull Am Meteor Soc, 77, pp. 437-471
  • Katz, R.W., Brown, B.G., Extreme events in a changing climate: variability is more important than averages (1992) Clim Change, 21, pp. 289-302
  • Kiladis, G.N., Weickmann, K.M., Extratropical forcing of the tropical Pacific convection during Northern winter (1992) Mon Wea Rev, 120, pp. 1924-1937
  • Liebmann, B., Smith, C.A., Description of a complete (interpolated) outgoing longwave radiation dataset (1996) Bull Am Meteor Soc, 77, pp. 1275-1277
  • Liebmann, B., Kiladis, G.N., Vera, C.S., Saulo, A.C., Carvalho, L.M.V., Subseasonal variations of rainfall in South America in the vicinity of the low-level jet east of the Andes and comparison to those in the South Atlantic convergence zone (2004) J Clim, 17, pp. 3829-3842
  • Lyon, B., Dole, R.M., A diagnostic comparison of the 1980 and 1988 U.S. summer heat wave-droughts (1995) J Clim, 8, pp. 1658-1675
  • Lyvezey, R.E., Tinker, R., Some meteorological, climatological and micrometeorological considerations of the severe U.S. heat wave of mid-July 1995 (1996) Bull Am Meteor Soc, 77, pp. 2043-2054
  • Madden, R.A., Julian, P.R., Observations of the 40-50-day oscillation-a review (1994) Mon Wea Rev, 122, pp. 814-837
  • Nogués-Paegle, J., Mo, K., Alternating wet and dry conditions over South America during summer (1997) Mon Wea Rev, 125, pp. 279-291
  • Nogués-Paegle, J., Byerle, L.A., Mo, K., Intraseasonal modulation of South America summer precipitation (2000) J Clim, 128, pp. 837-850
  • Norte, F., Simonelli, S.C., Seluchi, M., Viale, M., The heat waves in the center of Argentina. Preprints sixth international conference on Southern Hemisphere meteorology and oceanography (2000) Am Meteor Soc. Chile, pp. 198-199. , April 2000
  • Palecki, M.A., Changnon, S.A., Kenneth, E.K., The nature and impacts of the July 1999 heat wave in the Midwestern United States: learning from the lessons of 1995 (2001) Bull Am Meteor Soc, 82, pp. 1353-1367
  • Robinson, P.J., On the definition of a heat wave (2001) J Appl Meteor, 40, pp. 762-775
  • Rusticucci, M., (1995) Regional variability of 6 hours and daily surface temperatures over Argentina, , PhD thesis. University of Buenos Aires
  • Rusticucci, M., Vargas, W., Synoptic situations related to spells of extreme temperatures over Argentina (1995) Meteorol Appl, 2, pp. 291-300
  • Saji, N.H., Ambrizzi, T., Ferraz, S.E.T., Indian Ocean Dipole mode events and austral surface air temperature anomalies (2005) Dyn Atmos Oceans, 39 (1), pp. 87-101
  • Schneider, M., Silva Dias, P., Vitorino, M.I., Intraseasonal oscillation in the south Brazil during the 2003-2005 drought (2006) American Meteorological Society, , Preprints eigth international conference on Southern Hemisphere meteorology and oceanography (2003-2008), Foz Do Iguazu Brazil
  • Seluchi, M., Norte, F., Gomes, J., Simonelli, S., The Heat waves in the center of Argentina. Preprints eigth international conference on Southern Hemisphere meteorology and oceanography (2009-2010) (2006) American Meteorological Society, , Chile
  • Vera, C.S., A unified view of the American monsoon systems (2006) J Clim, 19, pp. 4977-5000
  • Wolter, K., Baldi, M., Chase, T.N., Otterman, J., Pielke, R.A., Rasool, I., Possible causes of the south-central European heat wave of 2003-a diagnostic perspective (2005) Geophys Res Abstr, 7, p. 10447

Citas:

---------- APA ----------
Cerne, S.B. & Vera, C.S. (2011) . Influence of the intraseasonal variability on heat waves in subtropical South America. Climate Dynamics, 36(11-12), 2265-2277.
http://dx.doi.org/10.1007/s00382-010-0812-4
---------- CHICAGO ----------
Cerne, S.B., Vera, C.S. "Influence of the intraseasonal variability on heat waves in subtropical South America" . Climate Dynamics 36, no. 11-12 (2011) : 2265-2277.
http://dx.doi.org/10.1007/s00382-010-0812-4
---------- MLA ----------
Cerne, S.B., Vera, C.S. "Influence of the intraseasonal variability on heat waves in subtropical South America" . Climate Dynamics, vol. 36, no. 11-12, 2011, pp. 2265-2277.
http://dx.doi.org/10.1007/s00382-010-0812-4
---------- VANCOUVER ----------
Cerne, S.B., Vera, C.S. Influence of the intraseasonal variability on heat waves in subtropical South America. Clim. Dyn. 2011;36(11-12):2265-2277.
http://dx.doi.org/10.1007/s00382-010-0812-4