Climate Projections and Uncertainties over South America from MRI/JMA Global Model Experiments


This paper analyses the climate change projected for the near and distant future in South America using MRI/JMA (Japanese Meteorological Agency) global model simulations with resolutions of 20 and 60 km. Changes in mean climate, as well as in the annual cycles and interannual variability of temperature and precipitation are discussed. An analysis is also made of the uncertainties of the 60 km resolution model experiments. For the near and distant future, both, the 20 km and 60 km resolution MRI/JMA models project that temperature changes will be positive in all seasons. The greatest values of change are over the Andes and over tropical and subtropical latitudes of the study region. In all the subregions analysed, the 20 km model projects greater changes in the annual cycle of mean temperature than the 60 km model. Changes in summer precipitation are positive over most of the continent, except for southern Chile. Autumn precipitation is projected to increase over northern Argentina and north-western South America and to decrease over central Chile in winter, which might be due to the southward shift of the Pacific storm-track. The most significant positive change in Southeastern South America (SESA) is projected to occur in spring precipitation. In general, projected changes in the annual cycle are greater in the rainy seasons of each subregion. No significant changes are expected in the interannual variability of temperature and precipitation. La Plata basin is projected to experience increased runoff, which would indicate that the projected rise in precipitation would have stronger effect than projected warming. The analysis of climate projection uncertainties revealed that temperature projections are more reliable than precipitation projections; and that uncertainty in near future simulations is greater than in simulations of the end of the century.

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J. Blázquez, M. Nestor Nu?ez and S. Kusunoki, "Climate Projections and Uncertainties over South America from MRI/JMA Global Model Experiments," Atmospheric and Climate Sciences, Vol. 2 No. 4, 2012, pp. 381-400. doi: 10.4236/acs.2012.24034.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] J. Blázquez and M. N. Nunez, “Performance of a High Resolution Global Model over Southern South America,” International Journal of Cliamtology, Early View (Online Version of Record Published before Inclusion in an Issue), 2012. doi:10.1002/joc.3478
[2] R. Garreaud and M. Falvey, “The Coastal Winds off Western Subtropical South America in Future Climate Scenarios,” International Journal of Climatology, Vol. 29, No. 4, 2008, pp. 543-554. doi:10.1002/joc.1716
[3] W. Soares and J. Marengo, “Assessments of Moisture Fluxes East of the Andes in South America in a Global Warming Scenario,” International Journal of Climatology, Vol. 29, No 10, 2008, pp. 1395-1414. doi:10.1002/joc.1800
[4] M. N. Nunez, S. A. Solman and M. F. Cabré, “Regional Climate Change Experiments over Southern South America. II: Climate Change Scenarios in the Late Twenty-First Century,” Climate Dynamics, Vol. 32, No. 7-8, 2009, pp. 1081-1095. doi:10.1007/s00382-008-0449-8
[5] J. A. Marengo, T. Ambrizzi, R. P. Rocha, L. M. Alves, S. V. Cuadra, M. C. Valverde, S. E. T. Ferraz, R. R. Torres and D. C. Santos, “Future Change of Climate in South America in the Late XXI Century: Intercomparison of Scenarios from Three Regional Climate Models,” Climate Dynamics, Vol. 33, No. 6, 2009, pp. 1073-1097. doi:10.1007/s00382-009-0721-6
[6] J. A. Marengo, R. Jones, L. M. Alves and M.-C. Valverde, “Future Change of Temperature and Precipitation Extremes in South America as Derived from the PRECIS Regional Climate Modeling System,” International Journal of Climatology, Vol. 29, No. 15, 2009, pp. 2241-2255. doi:10.1002/joc.1863
[7] R. Urrutia and M. Vuille, “Climate Change Projections for the Tropical Andes Using a Regional Climate Model: Temperature and Precipitation Simulations for the End of the 21st Century,” Journal of Geophysical Research, Vol. 114, No. D02108, 2009, 15 pp. doi:10.1029/2008JD011021
[8] M. F. Cabré, S. Solman and M. N. Nunez, “Creating Regional Climate Change Scenarios over Southern South America for the 2020’s and 2050’s Using the Pattern Scaling Technique: Validity and Limitations,” Climatic Change, Vol. 98, No. 3-4, 2010, pp. 449-469. doi:10.1007/s10584-009-9737-5
[9] J. A. Marengo, S. C. Chou, G. Kay, L. M. Alves, J. F. Pesquero, W. R. Soares, D. C. Santos, A. A. Lyra, G. Sueiro, R. Betts, D. J. Chagas, J. L. Gomes, J. F. Bustamante and P. Tavares, “Development of Regional Future Climate Change Scenarios in South America Using the Eta CPTEC/HadCM3 Climate Change Projections: Climatology and Regional Analyses for the Amazon, Sao Francisco and the Paraná River Basins,” Climate Dynamics, Vol. 38, No. 9-10, 2011. doi:10.1007/s00382-011-1155-5
[10] L. C. Labraga and M. Lopez M, “A Comparison of the Climate Response to Increased Carbon Dioxide Simulated by General Circulation Models with Mixed-Layer and Dynamic Ocean Representations in the Region of South America,” International Journal of Climatology, Vol. 17, No. 15, 1997, pp. 1635-1650. doi:10.1002/(SICI)1097-0088(199712)17:15<1635::AID-JOC223>3.0.CO;2-G
[11] A. F. Carril, C. G. Menéndez and M. N. Nunez, “Climate Change Scenarios over the South American Region: An Intercomparison of Coupled General Atmosphere-Ocean Circulation Models,” International Journal of Climatology, Vol. 17, No. 15, 1997, pp. 1613-1633. doi:10.1002/(SICI)1097-0088(199712)17:15<1613::AID-JOC209>3.0.CO;2-8
[12] M. Bidegain and I. Camilloni, “Performance of GCMs and Climate Future Scenarios for Southeastern South America,” Proceedings 8th International Conference on Southern Hemisphere Meteorology and Oceanography, Foz do Igua?u, 24-28 April 2006, pp. 223-226.
[13] C. Vera, G. Silvestri, B. Liebmann and P. Gonzalez, “Climate Change Scenarios for Seasonal Precipitation in South America from IPCC-AR4 Models,” Geophysical Research Letters, Vol. 33, No. L13707, 2006, 4 pp. doi:10.1029/2006GL025759
[14] A. Kitoh, S. Kusunoki and T. Nakaegawa, “Climate Change Projections over South America in the Late 21st Century with the 20 and 60 km Mesh Meteorological Research Institute Atmospheric General Circulation Model (MRI-AGCM),” Journal of Geophysical Research, Vol. 116, No. D06105, 2011, 21 pp. doi:10.1029/2010JD014920
[15] R. Mizuta, Y. Adachi, S. Yukimoto and S. Kusunoki S, “Estimation of the Future Distribution of Sea Surface Temperature and Sea Ice Using the CMIP3 Multi-Model Ensemble Mean,” Technical Reports, Meteorological Research Institute, Tsukuba, 2008.
[16] N. Nakicenovic, J. Alcamo, G. Davis, B. de Vries, J. Fenhann, S. Gaffin, K. Gregory, A. Grübler, T. Y. Jung, T. Kram, E. Lebre La Rovere, L. Michaelis, S. Mori, T. Morita, W. Pepper, H. Pitcher, L. Price, K. Riahi, A. Roehrl, H. H. Rogner, A. Sankovski, M. Schlesinger, P. Shukla, S. Smith, R. Swart, S. van Rooijen, N. Victor and Z. Dadi, “Special Report on Emissions Scenarios,” Cambridge University Press, Cambridge, 2000.
[17] S. A. Solman, M. N. Nunez and M. F. Cabré, “Regional Climate Change Experiments over Southern South America. I: Present Climate,” Climate Dynamics, Vol. 30, No. 5, 2008, pp. 533-552. doi:10.1007/s00382-007-0304-3
[18] I. Camilloni, “Climatic Trends,” In: V. Barros, A. Menéndez and G. Nagy, Eds., Climate Change in the La Plata River, Research Centre for Sea and Atmosphere (CIMA), Buenos Aires, 2005, 200 pp.
[19] A. Di Luca, I. Camilloni and V. Barros, “Sea-level pressure patterns in South America and the adjacent oceans in the IPCC AR4 models,” Proceedings 8th International Conference on Southern Hemisphere Meteorology and Oceanography, Foz do Iguacu, 24-28 April 2006, pp. 235-244.
[20] R. W. Lee and K. I. Hodges, “A Comparison of Extratropical Cyclones in CMIP5 Models,” Proceedings WCRP Open Science Conference, Denver, 24-28 October 2011.
[21] R. M. Caffera and E. H. Berbery, “La Plata Basin Climatology,” In: V. Barros, R. Clarke and P. S. Días, Eds., Climate Change in the la Plata Basin, Research Centre for Sea and Atmosphere (CIMA), Buenos Aires, 2006, 230 pp.
[22] P. C. D. Milly, K. A. Dunne and A. V. Vecchia, “Global Pattern of Trends in Stream Discharge and Water Availability in a Changing Climate,” Nature, Vol. 438, 2005, pp. 347-350. doi:10.1038/nature04312
[23] R. I. Saurral, “The Hydrologic Cycle of the La Plata Basin in the WCRP-CMIP3 Multimodel Dataset,” Journal of Hydrometeorology, Vol. 11, No. 5, 2010, pp. 1083-1102. doi:10.1175/2010JHM1178.1
[24] P. Aceituno, “On the Functioning of the Southern Oscillation in the South American Sector. Part I: Surface Climate,” Monthly Weather Review, Vol. 116, No. 3, 1998, pp. 505-524. doi:10.1175/1520-0493(1988)116<0505:OTFOTS>2.0.CO;2
[25] A. M. Grimm, V. Barros and M. Doyle, “Climate Variability in Southern South America Associated with El Nino and La Nina Events,” Journal of Climate, Vol. 13, No. 1, 2000, pp. 35-58. doi:10.1175/1520-0442(2000)013<0035:CVISSA>2.0.CO;2
[26] V. Barros and G. E. Silvestri, “The Relation between Sea Surface Temperature at the Subtropical South-Central Pacific and Precipitation in Southeastern South America,” Journal of Climate, Vol. 15, No. 3, 2002, pp. 251-267. doi:10.1175/1520-0442(2002)015<0251:TRBSST>2.0.CO;2
[27] C. Vera, P. K. Vigliarolo and E. H. Berbery, “Cold Season Synoptic-Scale Waves over Subtropical South America,” Monthly Weather Review, Vo. 130, No. 3, 2002, pp. 684-699. doi:10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2.

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