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Tropospheric Circulation Variability over Central and Southern South America

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DOI: 10.4236/acs.2014.45084    4,425 Downloads   4,948 Views  

ABSTRACT

Combined Empirical Orthogonal Function Analysis of low-level atmospheric circulation after filtering the synoptic scale was performed for the period 1981-2006 over Central and Southern South America. Modes with 40 and near 70 days frequency associated with swings in longitude of the South Pacific and South Atlantic Ocean heights were identified. Their extreme values were related to drought and to high anomalous precipitation associated to floods in South East South America (SESA). These modes were independent of other sources of variability of the Southern Hemisphere atmosphere, namely MJO (Madden-Julian Oscillation), ENSO (El Nino Southern Oscillation) and AAO (Antarctic Oscillation). Mode one, which in its positive phase has a circulation similar to the mean winter, has a trend that explains part of the winter warming observed since 1980’s in Central and Eastern Argentina. Variance was calculated for the intra-annual variability, the one associated to the inter-annual variability including trends and jumps, and that of the annual cycle. The partition of the total variance was roughly 70%, 10% and 20% respectively. This partition implies that predictability of the regional climate is more critically dependent on the predictability of the intra-annual variability than of the inter-annual variability.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Frumento, O. and Barros, V. (2014) Tropospheric Circulation Variability over Central and Southern South America. Atmospheric and Climate Sciences, 4, 956-978. doi: 10.4236/acs.2014.45084.

References

[1] Zhou, J.Y. and Lau, K.M. (1998) Does a Monsoon Climate Exist over South America? Journal of Climate, 11, 1020-1040. http://dx.doi.org/10.1175/1520-0442(1998)011<1020:DAMCEO>2.0.CO;2
[2] Marengo, J.A., Liebmann, B., Grimm, A.M., Misra, V., Silva Dias, P.L., Cavalcanti, I.F.A., Carvalho, L.M.V., Berbery, E.H., Ambrizzi, T., Vera, C.S., Saulo, A.C., Nogues-Paegle, J., Zipser, E., Seth, A. and Alves, L.M. (2010) Recent Developments on the South American Monsoon System. International Journal of Climatology, 32, 1-21.
http://dx.doi.org/10.1002/joc.2254
[3] Gallego, D., Ribera, P., Garcia-Herrera, R., Hernández, E. and Gimeno, L. (2005) A New Look for the Southern Hemisphere Jet Stream. Climate Dynamics, 24, 607-621. http://dx.doi.org/10.1007/s00382-005-0006-7
[4] Virji, H., (1981) A Preliminary Study of Summertime Tropospheric Circulation Patterns over South America Estimated from Cloud Winds. Monthly Weather Review, 109, 599-610.
http://dx.doi.org/10.1175/1520-0493(1981)109<0599:APSOST>2.0.CO;2
[5] Lenters, J.D. and Cook, K.H. (1999) Summertime Precipitation Variability over South America: Role of the LargeScale Circulation. Monthly Weather Review, 127, 409-431.
http://dx.doi.org/10.1175/1520-0493(1999)127<0409:SPVOSA>2.0.CO;2
[6] Chen, T., Weng, S. and Schubert, S. (1999) Maintenance of Austral Summertime Upper-Tropospheric Circulation over Tropical South America: The Bolivian High-Nordeste Low System. Journal of Atmospheric Science, 56, 2081-2100.
http://dx.doi.org/10.1175/1520-0469(1999)056<2081:MOASUT>2.0.CO;2
[7] Ferreira, N.J., Correia, A.A. and Ramirez, M.C.V. (2004) Synoptic Scale Features of the Tropospheric Circulation over Tropical South America during the WETAMC TRMM/LBA Experiment. Atmósfera, 17, 13-30.
[8] Kousky, V.E. and Gan, M.A. (1981) Upper Tropospheric Cyclonic Vortices in the Tropical South Atlantic. Tellus, 33, 538-551. http://dx.doi.org/10.1111/j.2153-3490.1981.tb01780.x
[9] Ramírez, M.C.V., Kayano, M.T. and Ferreira, N.J. (1999) Statistical Analysis of Upper Tropospheric Vortices in the Vicinity of Northeast Brazil during the 1980-1989 Period. Atmósfera, 12, 77-88.
[10] Mishra, S.K., Rao, V.B. and Gan, M.A. (2001) Structure and Evolution of the Large-Scale Flow and an Embedded UpperTropospheric Cyclonic Vortex over Northeast Brazil. Monthly Weather Review, 129, 1673-1688.
http://dx.doi.org/10.1175/1520-0493(2001)129<1673:SAEOTL>2.0.CO;2
[11] Greco, S., Swap, R., Garstang, M., et al. (1990) Rainfall and Surface Kinematic Conditions over Central Amazonia during ABLE 2B. Journal of Geophysical Research, 95, 17001-17014.
http://dx.doi.org/10.1029/JD095iD10p17001
[12] Li, W. and Fu, R. (2006) Influence of Cold Air Intrusions on the Wet Season Onset over Amazonia. Journal of Climate, 19, 257-275. http://dx.doi.org/10.1175/JCLI3614.1
[13] Paegle, J. (1998) A Comparative Review of South American Low-Level Jets. Meteorológica, 3, 73-82.
[14] Berbery, E.H. and Barros, V.R. (2002) The Hydrologic Cycle of the La Plata Basin in South America. Journal of Hydrometeorology, 3, 630-645.
http://dx.doi.org/10.1175/1525-7541(2002)003<0630:THCOTL>2.0.CO;2
[15] Kodama, Y.M. (1992) Large-Scale Common Features of Subtropical Precipitation Zones (the Baiu Frontal Zone, the SPCZ, and the ZCAS). Part I: Characteristics of Subtropical Frontal Zones. Journal of the Meteorological Society of Japan, 70, 813-835.
[16] Carvalho, L.M., Jones, C. and Liebmann, B. (2002) Extreme Precipitation Events in Southeastern South America and Large-Scale Convective Patterns in the South Atlantic Convergence Zone. Journal of Climate, 15, 2377-2394.
http://dx.doi.org/10.1175/1520-0442(2002)015<2377:EPEISS>2.0.CO;2
[17] Casarin, D.P. and Kousky, V.E. (1986) Anomalias de precipita??o no sul do Brasil e varia??es na circula??o atmosférica. Revista Brasileira de Meteorologia, 1, 83-90.
[18] Nogués-Paegle, J. and Mo, K.C. (1997) Alternating Wet and Dry Conditions over South America during Summer. Monthly Weather Review, 125, 279-291. http://dx.doi.org/10.1175/1520-0493(1997)125<0279:AWADCO>2.0.CO;2
[19] Doyle, M.E. and Barros, V.R. (2002) Midsummer Low-Level Circulation and Precipitation in Subtropical South America and Related Sea Surface Temperature Anomalies in the South Atlantic. Journal of Climate, 15, 3394-3410.
http://dx.doi.org/10.1175/1520-0442(2002)015<3394:MLLCAP>2.0.CO;2
[20] Jones, C. and Carvalho, L.M. (2002) Active and Break Phases in the South American Monsoon System. Journal of Climate, 15, 905-914. http://dx.doi.org/10.1175/1520-0442(2002)015<0905:AABPIT>2.0.CO;2
[21] Jones, C., Waliser, D.E., Lau, K.M. and Stern, W. (2004) Global Occurrences of Extreme Precipitation and the Madden-Julian Oscillation: Observations and Predictability. Journal of Climate, 17, 4575-4589.
http://dx.doi.org/10.1175/3238.1
[22] Grimm, A.M. and Ambrizzi, T. (2009) Teleconnections into South America from the Tropics and Extratropics on Interannual and Intraseasonal Timescales. In: Vimeux, F., Sylvestre, F. and Khodri, M., Eds., Past Climate Variability in South America and Surrounding Regions: From the Last Glacial Maximum to the Holocene, Springer, Apeldoorn, 159-191. http://dx.doi.org/10.1007/978-90-481-2672-9_7
[23] Limpasuvan, V. and Hartmann, D.L. (1999) Eddies and the Annular Modes of Climate Variability. Geophysical Research Letters, 26, 3133-3136. http://dx.doi.org/10.1029/1999GL010478
[24] Gong, D. and Wang, S. (1999) Definition of Antarctic Oscillation Index. Geophysical Research Letters, 26, 459-462.
http://dx.doi.org/10.1029/1999GL900003
[25] Thompson, D.W.J. and Wallace, J.M. (2000) Annular Modes in the Extratropical Circulation. Part I: Month-to-Month Variability. Journal of Climate, 13, 1000-1016.
http://dx.doi.org/10.1175/1520-0442(2000)013<1000:AMITEC>2.0.CO;2
[26] Carvalho, L.M., Jones, C. and Ambrizzi, T. (2005) Opposite Phases of the Antarctic Oscillation and Relationships with Intraseasonal to Interannual Activity in the Tropics during the Austral Summer. Journal of Climate, 18, 702-718.
http://dx.doi.org/10.1175/JCLI-3284.1
[27] Kidson, J.W. (1988) Indices of the Southern Hemisphere Zonal Wind. Journal of Climate, 1, 183-194.
http://dx.doi.org/10.1175/1520-0442(1988)001<0183:IOTSHZ>2.0.CO;2
[28] Rogers, J.C. and van Loon, H. (1982) Spatial Variability of Sea Level Pressure and 500mb Height Anomalies over the Southern Hemisphere. Monthly Weather Review, 110, 1375-1392.
http://dx.doi.org/10.1175/1520-0493(1982)110<1375:SVOSLP>2.0.CO;2
[29] Silvestri, G.E. and Vera, C.S. (2003) Antarctic Oscillation Signal on Precipitation Anomalies over Southeastern South America. Geophysical Research Letters, 30, 2115-2118.
http://dx.doi.org/10.1029/2003GL018277
[30] Vasconcellos, F.C. and Cavalcanti, I.F.A. (2010) Extreme Precipitation over Southeastern Brazil in the Austral Summer and Relations with the Southern Hemisphere Annular Mode. Atmospheric Science Letters, 11, 21-26.
[31] Mo, K. (2000) Relationships between Low-Frequency Variability in the Southern Hemisphere and Sea Surface Temperature Anomalies. Journal of Climate, 13, 3599-3610.
http://dx.doi.org/10.1175/1520-0442(2000)013<3599:RBLFVI>2.0.CO;2
[32] Kousky, V.E., Kayano, M.T. and Cavalcanti, I.F.A. (1984) A Review of the Southern Oscillation: Oceanic-Atmospheric Circulation Changes and Related Rainfall Anomalies. Tellus, 36, 490-504.
http://dx.doi.org/10.1111/j.1600-0870.1984.tb00264.x
[33] Ropelewski, C.F. and Halpert, M.S. (1987) Global and Regional Scale Precipitation Patterns Associated with the El Nino/Southern Oscillation. Monthly Weather Review, 115, 1606-1626.
http://dx.doi.org/10.1175/1520-0493(1987)115<1606:GARSPP>2.0.CO;2
[34] Ropelewski, C.F. and Halpert, M.S. (1989) Precipitation Patterns Associated with the High Index Phase of the Southern Oscillation. Journal of Climate, 2, 268-284.
http://dx.doi.org/10.1175/1520-0442(1989)002<0268:PPAWTH>2.0.CO;2
[35] Aceituno, P. (1988) On the Functioning of the Southern Oscillation in the South American Sector. Part 1: Surface Climate. Monthly Weather Review, 116, 505-524.
http://dx.doi.org/10.1175/1520-0493(1988)116<0505:OTFOTS>2.0.CO;2
[36] Kiladis, G. and Diaz, H.F. (1989) Global Climatic Anomalies Associated with Extremes in the Southern Oscillation. Journal of Climate, 2, 1069-1090.
http://dx.doi.org/10.1175/1520-0442(1989)002<1069:GCAAWE>2.0.CO;2
[37] Rao, V.B. and Hada, K. (1990) Characteristics of Rainfall over Brazil: Annual Variations and Connections with the Southern Oscillation. Theoretical and Applied Climatology, 42, 81-91.
http://dx.doi.org/10.1007/BF00868215
[38] Grimm, A.M., Barros, V.R. and Doyle, M.E. (2000) Climate Variability in Southern South America Associated with El Nino and La Nina Events. Journal of Climate, 13, 35-58.
http://dx.doi.org/10.1175/1520-0442(2000)013<0035:CVISSA>2.0.CO;2
[39] Barros, V.R and Silvestri, G.E. (2002) The Relation between Sea Surface Temperature at the Subtropical South-Central Pacific and Precipitation in Southeastern South America. Journal of Climate, 15, 251-267.
http://dx.doi.org/10.1175/1520-0442(2002)015<0251:TRBSST>2.0.CO;2
[40] Grimm, A.M. (2011) Interannual Climate Variability in South America: Impacts on Seasonal Precipitation, Extreme Events and Possible Effects of Climate Change. Stochastic Environmental Research and Risk Assessment, 25, 537-554.
http://dx.doi.org/10.1007/s00477-010-0420-1
[41] Kayano, M.T. (2003) A Note on the Precipitation Anomalies in Southern South America Associated with ENSO Variability in the Tropical Pacific. Meteorology and Atmospheric Physics, 84, 267-274.
http://dx.doi.org/10.1007/s00703-002-0599-x
[42] Vera, C., Silvestri, G.E., Barros V.R. and Carril, A. (2004) Differences in El Nino Response over the Southern Hemisphere. Journal of Climate, 17, 1741-1753.
http://dx.doi.org/10.1175/1520-0442(2004)017<1741:DIENRO>2.0.CO;2?
[43] Díaz, A., Studzinski, C.D. and Mechoso, C.R. (1998) Relationships between Precipitation Anomalies in Uruguay and Southern Brazil and Sea Surface Temperature in the Pacific and Atlantic Oceans. Journal of Climate, 11, 251-271.
http://dx.doi.org/10.1175/1520-0442(1998)011<0251:RBPAIU>2.0.CO;2
[44] Camilloni, I. and Barros, V.R. (2004) South Atlantic Sea Surface Temperature and Its Relation with the Paraná River Discharges during El Nino 1982-83 and 1997-98. Revista Brasileira de Meteorologia, 19, 35-47.
[45] Castaneda, E. and Barros, V.R. (1994) Las tendencias de la precipitación en el Cono sur de América al este de los Andes. Meteorologica, 19, 23-32.
[46] Barros, V.R., Castaneda, E. and Doyle, M.E. (2000) Recent Precipitation Trends in Southern South America East of the Andes: An Indication of Climatic Variability. In: Smolka, P.P. and Volkheimer, W., Eds., Southern Hemisphere Paleo and Neoclimates, Springer, New York, 187-206.
http://dx.doi.org/10.1007/978-3-642-59694-0_13?
[47] Quintana, J. and Aceituno, P. (2006) Trends and Interdecadal Variability of Rainfall in Chile. Proceedings of the 8th ICSHMO, Foz do Iguacu, 24-28 April 2006, 371-372.
[48] Sturaro, G. (2003) A Closer Look at the Climatological Discontinuities Present in the NCEP/NCAR Reanalysis Temperature Due to the Introduction of Satellite Data. Climate Dynamics, 21, 309-316.
http://dx.doi.org/10.1007/s00382-003-0334-4
[49] Bengtsson, L., Hodges, K. and Hagemann, S. (2004) Can Climate Trends Be Calculated from Reanalysis Data? Journal of Geophysical Research, 109, 1984-2012. http://dx.doi.org/10.1029/2004JD004536
[50] Kanamitsu, M., Ebisuzaki, W., Woollen, J., Yang, S.K., Hnilo, J.J., Fiorino, M. and Potter, G.L. (2002) NCEP-DOE AMIP II Reanalysis (R-2). Bulletin of the American Meteorological Society, 83, 1631-1643.
http://dx.doi.org/10.1175/BAMS-83-11-1631
[51] Reynolds, R.W., Rayner, N.A., Smith, T.M., Stokes, D.C. and Wang, W. (2002) An Improved in Situ and Satellite SST Analysis for Climate. Journal of Climate, 15, 1609-1625.
http://dx.doi.org/10.1175/1520-0442(2002)015<1609:AIISAS>2.0.CO;2
[52] Liebmann, B. and Smith, C.A. (1996) Description of a Complete (Interpolated) Outgoing Longwave Radiation Dataset. Bulletin of the American Meteorological Society, 77, 1275-1277.
[53] Duchon, C.E. (1979) Lanczos Filtering in One and Two Dimensions. Journal of Applied Meteorology, 18, 1016-1022.
http://dx.doi.org/10.1175/1520-0450(1979)018<1016:LFIOAT>2.0.CO;2
[54] Slepian, S. (1978) Prolate Spheroidal Wave Functions, Fourier Analysis and Uncertainty-V: The Discrete Case. The Bell System Technical Journal, 57, 1371-1430. http://dx.doi.org/10.1002/j.1538-7305.1978.tb02104.x
[55] Mann, M.E. and Lees, J.M. (1996) Robust Estimation of Background Noise and Signal Detection in Climatic Time Series. Climate Change, 33, 409-445. http://dx.doi.org/10.1007/BF00142586
[56] Cattell, R.B. (1996) The Scree Test for the Number of Factors. Multivariate Behavioral Research, 1, 245-276.
http://dx.doi.org/10.1207/s15327906mbr0102_10
[57] Cunningham, C.C. and Cavalcanti, I.F.A. (2006) Intraseasonal Modes of Variability Affecting the South Atlantic Convergence Zone. International Journal of Climatology, 26, 1165-1180.
http://dx.doi.org/10.1002/joc.1309
[58] Karoly, D.J. (1989) Southern Hemisphere Circulation Features Associated with El Ni?o-Southern Oscillation Events. Journal of Climate, 2, 1239-1252. http://dx.doi.org/10.1175/1520-0442(1989)002<1239:SHCFAW>2.0.CO;2
[59] Liebmann, B., Kiladis, G.N., Vera, C.S., Saulo, C. and Carvalho, L.M.V. (2004) 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. Journal of Climate, 17, 3829-3842.
http://dx.doi.org/10.1175/1520-0442(2004)017<3829:SVORIS>2.0.CO;2
[60] Kessler, W.S. and Kleeman, R. (2000) Rectification of the Madden-Julian Oscillation into the ENSO Cycle. Journal of Climate, 13, 3560-3575.
[61] Zhang, C. and Gottschalck, J. (2002) SST Anomalies of ENSO and the Madden-Julian Oscillation in the Equatorial Pacific. Journal of Climate, 15, 2429-2445.
http://dx.doi.org/10.1175/1520-0442(2002)015<2429:SAOEAT>2.0.CO;2
[62] Escobar, G., Camilloni, I. and Barros, V.R. (2003) Desplazamiento del anticiclón subtropical del Atlántico Sur y su relación con el cambio de vientos sobre el estuario del Río de la Plata (Shift of the Subtropical High of the South Atlantic and Its Relation with the Wind Changes over the Plata River Estuary). Proceedings of the 10th Latin American and Iberian Congress of Meteorology, La Habana, 3-7 March 2003.

  
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