Statistical Prediction of Wet and Dry Periods in theComahue Region (Argentina)
Marcela H. González, Diana Dominguez
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DOI: 10.4236/acs.2012.21004   PDF    HTML     5,508 Downloads   9,212 Views   Citations

Abstract

General features of rainy season with excess or deficits are analyzed using standardized precipitation index (SPI) in Limay and Neuquen River basins. Results indicate that most of dry and wet periods persist less than three months in both basins. Furthermore, an increase of rainfall variability over time is observed in the Limay river basin but it is not detected in the Neuquen river basin. There is a tendency for wet (dry) periods to take place in El Ni?o (La Ni?a) years in both basins. Rainfall in both basins, have an important annual cycle with its maximum in winter. In addition, possible causes of extreme rainy seasons over the Limay River Basin are detailed. The main result is that the behavior of low level precipitation systems displacing over the Pacific Ocean in April influences the general hydric situation during the whole rainy season. In order to establish the existence of previous circulation patterns associated with interannual SPI variability, the composite fields of wet and dry years are compared. The result is that rainfall is related to El Ni?o- Southern Oscillation (ENSO) phenomenon and circulation over the Pacific Ocean. The prediction scheme, using multiple linear regressions, showed that 46% of the SPI variance can be explained by this model. The scheme was validated by using a cross-validation method, and significant correlations are detected between observed and forecast SPI. A polynomial model is used and it little improved the linear one, explaining the 49% of the SPI variance. The analysis shows that circulation indicators are useful to predict winter rainfall behavior.

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M. González and D. Dominguez, "Statistical Prediction of Wet and Dry Periods in theComahue Region (Argentina)," Atmospheric and Climate Sciences, Vol. 2 No. 1, 2012, pp. 23-31. doi: 10.4236/acs.2012.21004.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] T. Gissila, E. Black, D. I. F. Grime and J. M. Slingo, “Seasonal Forecasting of the Ethiopian Summer Rains,” International Journal of Climatology, Vol. 24, No. 11, 2004, pp. 1345-1358. doi:10.1002/joc.1078
[2] C. Reason, “Subtropical Indian Ocean SST Dipole Events and Southern Africa Rainfall,” Geophysical Research Letters, Vol. 28, No. 11, 2001, pp. 2225-2227. doi:10.1029/2000GL012735
[3] X. Zheng and C. Frederiksen, “A Study of Predictable Patterns for Seasonal Forecasting of New Zealand Rainfall,” Journal of Climate, Vol. 19, No. 13, 2006, pp. 3320-3333. doi:10.1175/JCLI3798.1
[4] M. H. González and C. S. Vera, “On the Interannual Winter Rainfall Variability in Southern Andes,” International Journal of Climatology, Vol. 30, No. 5, 2010, pp. 643-657
[5] M. H. González, M. M. Skansi and F. Losano, “A Statistical Study of Seasonal Winter Rainfall Prediction in the Comahue Region (Argentine),” Atmosfera, Vol. 23, No. 3, 2010, pp. 277-294.
[6] M. L. Cariaga and M. H. González, “Estimating Winter and Spring Rainfall in the Comahue Region (Argentine) Using Statistical Techniques,” Advances in Environmental Research 11, Justin A. Daniels, Nova Science Publishers Inc., New York, 2011, pp. 103-128.
[7] M. H. González and A. M. Murgida, “Seasonal Summer Rainfall Prediction in Bermejo River Basin in Argentina,” Climate Variability, Abdel Hannachi, Intech, Reading, 2011, in Press.
[8] C. Schneider and D. Gies, “Effects of El Ni?o-Southern Oscillation on Southernmost South America Precipitation at 53oS Revealed from NCEP-NCAR Reanalysis and Weather Station Data,” International Journal of Climatology, Vol. 24, No. 9, 2004, pp. 1057-1076. doi:10.1002/joc.1057
[9] 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, 1988, pp. 505-524. doi:10.1175/1520-0493(1988)116<0505:OTFOTS>2.0.CO;2
[10] P. Aceituno and R. Garreaud, “Impactos de Los Fenó- menos El Ni?o y La Ni?a Sobre Regímenes Fluvio- métricos Andinos,” Revista de la Sociedad Chilena de Ingeniería Hidráulica, Vol. 10, No. 2, 1995, pp. 33-43.
[11] J. Rutland and H. Fuenzalida, “Synoptic Aspects of the Central Chile Rainfall Variability Associated with the Southern Oscillation,” International Journal of Clima- tology, Vol. 11, No. 1, 1991, pp. 63-76. doi:10.1002/joc.3370110105
[12] P. Aceituno, “Seasonality of the ENSO Related Rainfall Variability in Central Chile and Associated Circulation Anomalies,” Journal of Climate, Vol. 16, No. 2, 2003, pp. 281-296. doi:10.1175/1520-0442(2003)016<0281:SOTERR>2.0.CO;2
[13] R. Compagnucci and W. Vargas, “Inter-Annual Variability of the Cuyo River Streamflowin the Argentinean Andean Mountains and ENSO Events,” International Journal of Climatology, Vol. 18, No. 14, 1998, pp. 1593-1609. doi:10.1002/(SICI)1097-0088(19981130)18:14<1593::AID-JOC327>3.0.CO;2-U
[14] R. Compagnucci and D. Araneo, “Identificación de áreas de Homogeneidad Estadística Para los Caudales de los Ríos Andinos Argentinos y su Relación Con la Circu- lación Atmosférica y la Temperatura Superficial del Mar,” Meteorologica, Vol. 30, No. 1, 2005, pp. 41-54.
[15] T. B. Mckee, N. Doesken and J. Kleist, “The Relationship of Drought Frequency and Duration to Times Scales,” Proceeding 8th Conference of Applied Climatology, Anaheim, 17-22 January 1993.
[16] T. B. McKee, N. Doesken and J. Kleist, “Drought Moni- toring with Multiple Time Scales,” Proceeding 9th Con- ference on Applied Climatology, Dallas, 15-20 January 1995.
[17] E. Kalnay, M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. Iredell, S. Saha, G. White, J. Woollen, I. Zhu, M. Chelliah, W. Ebisuzaki, W. Higgings, J. Janowiak, K. C. Mo, C. Ropelewski, J. Wang, A. Leetmaa, R. Reynolds, R. Jenne and D. Joseph, “The NCEP/NCAR Reanalysis 40 Years-Project,” Bulletin of the American Meteorological Society, Vol. 77, 1996, pp. 437-471. doi:10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2
[18] D. S. Wilks, “Statistical Methods in the Atmospheric Sciences (An Introduction),” International Geophysics Series Academic Press, San Diego, 1995.
[19] R. B. Darlington, “Regression and Linear Models,” McGraw- Hill, New York, 1990.
[20] E. Kalnay, K. C. Mo and J. Paegle, “Large-Amplitude, Short Scale Stationary Rossby Waves in the Southern Hemisphere: Observations and Mechanistics Experiments on Determine Their Origin,” Journal of the Atmospheric Sciences, Vol. 43, No. 3, 1986, pp. 252-275. doi:10.1175/1520-0469(1986)043<0252:LASSSR>2.0.CO;2
[21] NOAA/ESRL Physical Sciences Division, Boulder Colorado, 2011. http://www.cdc.noaa.gov
[22] H. Panofsky and G. Brier, “Some Applications of Sta- tistics to Meteorology,” The Pennsylvania State University, Pennsylvania, 1965.

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