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Abstract:

Some aspects of the seasonal precipitation over eastern Patagonia, the southernmost area of South America east of the Andes Cordillera, are examined in this paper. Results indicate that the central-north areas, the southern continental region, and the southernmost islands are three independent regions of seasonal precipitation, and that each of them is associated with specific patterns of atmospheric circulation. Precipitation over the central-north region is significantly related to the precipitation over a wide area of southern South America east of the Andes during the four seasons. Enhanced (reduced) precipitation over this area is associated with weakened (intensified) westerly flow in the region. Precipitation over the southern continental area has a close connection with the dipolar pattern of precipitation over subtropical South America during spring, summer, and autumn. The anomalies of atmospheric circulation at low and upper levels associated with the subtropical dipole are also able to modulate the intensity of the westerlies over the south of eastern Patagonia, affecting the regional precipitation. Precipitation over the islands of the southernmost part of eastern Patagonia is connected with subtropical precipitation in summer and winter. The activity of frontal systems associated with migratory perturbations moving to the east along the Southern Hemisphere storm tracks modulates the variability of seasonal precipitation over this region. © 2012 American Meteorological Society.

Registro:

Documento: Artículo
Título:Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation
Autor:Berman, A.L.; Silvestri, G.; Compagnucci, R.
Filiación:Centro de Investigaciones del Mar y la Atmósfera, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Palabras clave:Atmospheric circulation; Climate variability; Interannual variability; South America; Southern Hemisphere; Teleconnections; Atmospheric circulation; Climate variability; Interannual variability; South America; Southern Hemisphere; Teleconnections; Climate change; Meteorology; Tropics; annual variation; atmospheric circulation; climate variation; precipitation (climatology); seasonal variation; Southern Hemisphere; subtropical region; teleconnection; Patagonia
Año:2012
Volumen:25
Número:19
Página de inicio:6781
Página de fin:6795
DOI: http://dx.doi.org/10.1175/JCLI-D-11-00514.1
Título revista:Journal of Climate
Título revista abreviado:J. Clim.
ISSN:08948755
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v25_n19_p6781_Berman

Referencias:

  • Alessandro, A., Bloqueos simultaneos en el Atlantico y Pacifico Sur y sus influencias sobre la Republica Argentina (2005) Rev. Bras. Meteor., 20, pp. 277-300
  • Alessandro, A., Temperature and precipitation conditions in Argentina associated with strong westerly mid-latitute (2008) Rev. Bras. Meteor., 23, pp. 126-142
  • Aravena, J.-C., Luckman, B.H., Spatio-temporal rainfall patterns in southern South America (2009) Int. J. Climatol., 29, pp. 2106-2120
  • Barrett, B.S., Garreaud, R.D., Falvey, M., Effect of the Andes Cordillera on precipitation from a midlatitude cold front (2009) Mon. Wea. Rev., 137, pp. 3092-3109
  • Berbery, E., Vera, C., Characteristics of the Southern Hemisphere winter storm track with filtered and unfiltered data (1996) J. Atmos. Sci., 53, pp. 468-481
  • Berbery, E., Barros, V., The hydrologic cycle of the La Plata basin in South America (2002) J. Hydrometeor., 3, pp. 630-645
  • Berbery, E., Nogues-Paegle, J., Horel, J., Wavelike Southern Hemisphere extratropical teleconnections (1992) J. Atmos. Sci., 49, pp. 155-177
  • Boninsegna, J.A., Dendroclimatological reconstructions in South America: A review (2009) Palaeogeogr. Palaeoclimatol. Palaeoecol., 281, pp. 210-228
  • Castañeda, M., Compagnucci, R., Temporal variability of lower stratosphere temperature (2005) Stud. Geophys. Geod., 49, pp. 573-596
  • Castañeda, M., Gonzalez, M., Statistical analysis of the precipitation trends in the Patagonia region in southern South America (2008) Atmósfera, 21, pp. 303-317
  • Cattell, R., The Scree test for the number of factors (1966) Multivariate Behav. Res., 1, pp. 245-276
  • Compagnucci, R.H., Atmospheric circulation over Patagonia since the Jurassic to present: A review through proxy data and climatic modeling scenarios (2011) Biol. J. Linn. Soc., 103, pp. 229-249
  • Compagnucci, R.H., Vargas, W.M., Inter-annual variability of the Cuyo rivers' streamflow in the Argentinean Andean mountains and ENSO events (1998) Int. J. Climatol., 18, pp. 1593-1609
  • Compagnucci, R.H., Richman, M.B., Can principal component analysis provide atmospheric circulation or teleconnection patterns? (2008) Int J. Climatol., 28, pp. 703-726
  • Diaz, A., Aceituno, P., Atmospheric circulation anomalies during episodes of enhanced and reduced convective cloudiness over Uruguay (2003) J. Climate, 16, pp. 3171-3185
  • Doyle, M., Barros, V., Midsummer low-level circulation and precipitation in subtropical South America and related sea surface temperature anomalies in the South Atlantic (2002) J. Climate, 15, pp. 3394-3410
  • Frumento, O., The severe precipitation event of April 1998 in north-east Patagonia. Preprints, Sixth Int. Conf. on Southern Hemisphere Meteorology and Oceanography, Boulder, CO (2000) Amer. Meteor. Soc., pp. 406-407
  • Garreaud, R.D., Precipitation and circulation covariability in the extratropics (2007) J. Climate, 20, pp. 4789-4797
  • Garreaud, R.D., The Andes climate and weather (2009) Adv. Geosci., 7, pp. 1-9
  • Garreaud, R.D., Vuille, M., Compagnucci, R., Marengo, J., Presentday South American climate (2009) Palaeogeogr. Palaeoclimatol. Palaeoecol., 281, pp. 180-195
  • Gillett, N., Kell, T.D., Jones, P.D., Regional climate impacts of the southern annular mode (2006) Geophys. Res. Lett., 33, pp. L23704. , doi:10.1029/2006GL027721
  • Gilli, A., Ariztegui, D., Anselmetti, F.S., McKenzie, J.A., Markgraf, V., Hajdas, I., McCulloch, R.D., Mid-Holocene strengthening of the southern westerlies in South America-Sedimentological evidences from Lago Cardiel Argentina (498S). (2005) Global Planet. Change, 49, pp. 75-93
  • Gonzalez, M., Vera, C., On the interannual wintertime rainfall variability in the southern Andes (2010) Int. J. Climatol., 30, pp. 643-657
  • Gonzalez, M., Skansi, M., Losano, F., Astatistical study of seasonal winter rainfall prediction in the Comahue region (Argentina) (2010) Atmósfera, 23, pp. 277-294
  • Haberzettl, T., Climatically induced lake level changes during the last two millennia as reflected in sediments of Laguna Potrok Aike, southern Patagonia (Santa Cruz Argentina) (2005) J. Paleolimnol., 33, pp. 283-302
  • Hoffmann, J.A.J., Maps of mean temperature and precipitation (1975) Climatic Atlas of South America, 1, pp. 1-28. , WMO/ UNESCO
  • Jobbágy, E.G., Paruelo, J.M., León, R.J.C., Estimación del régimen de precipitación a partir de la distancia a la cordillera en el noroeste de la Patagonia (1995) Ecol. Austral, 5, pp. 47-53
  • Kaiser, H., The varimax criterion for analytic rotation in factor analysis (1958) Psychometrika, 23, pp. 187-200
  • Kaiser, H., Computer program for varimax rotation in factor analysis (1959) Educ. Psychol. Meas., 19, pp. 413-420
  • Kalnay, E., The NCEP/NCAR 40-Year Reanalysis Project (1996) Bull. Amer. Meteor. Soc., 77, pp. 437-471
  • Kiladis, G., Diaz, H., Global climatic anomalies associated with extremes in the Southern Oscillation (1989) J. Climate, 2, pp. 1069-1090
  • Mayr, C., 2007a Holocene variability of the Southern Hemisphere westerlies in Argentinean Patagonia (528S) Quat. Sci. Rev., 26, pp. 579-584
  • Mayr, C., 2007b Precipitation origin and evaporation of lakes in semi-arid Patagonia (Argentina) inferred from stable isotopes (d18O, d2H) J. Hydrol., 334, pp. 53-63
  • Mo, K.C., Higgins, R., The Pacific-South American modes and tropical convection during the Southern Hemisphere winter (1998) Mon. Wea. Rev., 126, pp. 1581-1596
  • Mo, K.C., Paegle, J.N., The Pacific-South American modes and their downstream effects (2001) Int. J. Climatol., 21, pp. 1211-1229
  • North, G., Bell, T., Cahalan, R., Moeng, F., Sampling errors in the estimation of empirical orthogonal functions (1982) Mon. Wea. Rev., 110, pp. 699-706
  • Paruelo, J., Beltran, A., Jobbagy, E., Sala, O., Golluscio, R., The climate of Patagonia: General patterns and controls on biotic processes (1998) Ecol. Austral, 8, pp. 85-101
  • Pittock, A.B., Patterns of climatic variation in Argentina and Chile-I. Precipitation 1931-60 (1980) Mon. Wea. Rev., 108, pp. 1347-1361
  • Prohaska, F., The climate of Argentina, Paraguay andUruguay (1976) Climates of Central and South America, 12, pp. 13-72. , W. Schwerdtfeger, Ed., World Survey of Climatology Elsevier
  • Richman, M., Rotation of principal components (1986) J. Climatol., 6, pp. 293-335
  • Rutllant, J., Fuenzalida, H., Synoptic aspects of the central Chile rainfall variability associated with the Southern Oscillation (1991) Int. J. Climatol., 11, pp. 63-76
  • Schneider, C., Gies, D., Effects of El Niño-Southern Oscillation on southernmost South America precipitation at 538S revealed from NCEP-NCAR reanalysis and weather station data (2004) Int. J. Climatol., 24, pp. 1057-1076
  • Silvestri, G., Vera, C., Nonstationary impacts of the southern annular mode on Southern Hemisphere climate (2009) J. Climate, 22, pp. 6142-6148
  • Trenberth, K., Storm tracks in the Southern Hemisphere (1991) J. Atmos. Sci., 48, pp. 2159-2178
  • Vera, C., Toward a unified view of the American monsoon systems (2006) J. Climate, 19, pp. 4977-5000
  • Xie, P., Arkin, P., Global precipitation: A 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs (1997) Bull. Amer. Meteor. Soc., 78, pp. 2539-2558
  • Zhou, J., Lau, K.-M., Principal modes of interannual and decadal variability of summer rainfall over South America (2001) Int. J. Climatol., 21, pp. 1623-1644

Citas:

---------- APA ----------
Berman, A.L., Silvestri, G. & Compagnucci, R. (2012) . Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation. Journal of Climate, 25(19), 6781-6795.
http://dx.doi.org/10.1175/JCLI-D-11-00514.1
---------- CHICAGO ----------
Berman, A.L., Silvestri, G., Compagnucci, R. "Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation" . Journal of Climate 25, no. 19 (2012) : 6781-6795.
http://dx.doi.org/10.1175/JCLI-D-11-00514.1
---------- MLA ----------
Berman, A.L., Silvestri, G., Compagnucci, R. "Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation" . Journal of Climate, vol. 25, no. 19, 2012, pp. 6781-6795.
http://dx.doi.org/10.1175/JCLI-D-11-00514.1
---------- VANCOUVER ----------
Berman, A.L., Silvestri, G., Compagnucci, R. Eastern patagonia seasonal precipitation: Influence of southern hemisphere circulation and links with subtropical South American precipitation. J. Clim. 2012;25(19):6781-6795.
http://dx.doi.org/10.1175/JCLI-D-11-00514.1