On the interannual wintertime rainfall variability in the Southern Andes
The paper concentrates on the analysis of the interannual variability of wintertime rainfall in the Southern Andes. Besides the socio-economic relevance of the region, mainly associated with hydroelectric energy production, the study of the climate variability in that area has not received as much a...
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2010
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v30_n5_p643_Gonzalez http://hdl.handle.net/20.500.12110/paper_08998418_v30_n5_p643_Gonzalez |
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paper:paper_08998418_v30_n5_p643_Gonzalez2023-06-08T15:49:40Z On the interannual wintertime rainfall variability in the Southern Andes Gonzalez, Marcela Hebe Vera, Carolina Susana El niño southern oscillation Indian ocean Interannual variability Southern andes Southern annular mode Atmospheric circulation Climate variability Future applications Hydroelectric energy production Indian ocean Interannual Interannual variability Ocean surfaces Rossby wave Sea surface temperature anomalies Seasonal prediction Socio-economics South America Southern Annular Mode Southern Oscillation Tropical Indian ocean Winter rainfall Wintertime rainfall Atmospheric pressure Atmospheric temperature Climate change Financial data processing Locomotives Nickel compounds Ocean currents Railroad cars Rain Surface waters Principal component analysis annual variation atmospheric circulation climate variation El Nino-Southern Oscillation precipitation assessment principal component analysis rainfall Rossby wave sea surface temperature winter Andes Indian Ocean Indian Ocean (Tropical) The paper concentrates on the analysis of the interannual variability of wintertime rainfall in the Southern Andes. Besides the socio-economic relevance of the region, mainly associated with hydroelectric energy production, the study of the climate variability in that area has not received as much attention as others along the Andes. The results show that winter rainfall explains the largest percentage of regional total annuals. A principal component analysis (PCA) of the winter rainfall anomalies showed that the regional year-to-year variability is mostly explained by three leading patterns. While one of them is significantly associated with both the El Niño Southern Oscillation (ENSO), and the Southern Annular Mode (SAM), the other two patterns are significantly related to interannual changes of the sea surface temperature (SST) anomalies in the tropical Indian Ocean. Specifically, changes in the ocean surface conditions at both tropical basins induce in the atmospheric circulation the generation of Rossby wave trains that extend along the South Pacific towards South America, and alter the circulation at the region under study. The relationship between variability in the Indian Ocean and the Andes climate variability has not been previously addressed. Therefore, this result makes a significant contribution to the identification of the sources of predictability in South America with relevant consequences for future applications in seasonal predictions. © 2009 Royal Meteorological Society. Fil:González, M.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vera, C.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v30_n5_p643_Gonzalez http://hdl.handle.net/20.500.12110/paper_08998418_v30_n5_p643_Gonzalez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
El niño southern oscillation Indian ocean Interannual variability Southern andes Southern annular mode Atmospheric circulation Climate variability Future applications Hydroelectric energy production Indian ocean Interannual Interannual variability Ocean surfaces Rossby wave Sea surface temperature anomalies Seasonal prediction Socio-economics South America Southern Annular Mode Southern Oscillation Tropical Indian ocean Winter rainfall Wintertime rainfall Atmospheric pressure Atmospheric temperature Climate change Financial data processing Locomotives Nickel compounds Ocean currents Railroad cars Rain Surface waters Principal component analysis annual variation atmospheric circulation climate variation El Nino-Southern Oscillation precipitation assessment principal component analysis rainfall Rossby wave sea surface temperature winter Andes Indian Ocean Indian Ocean (Tropical) |
| spellingShingle |
El niño southern oscillation Indian ocean Interannual variability Southern andes Southern annular mode Atmospheric circulation Climate variability Future applications Hydroelectric energy production Indian ocean Interannual Interannual variability Ocean surfaces Rossby wave Sea surface temperature anomalies Seasonal prediction Socio-economics South America Southern Annular Mode Southern Oscillation Tropical Indian ocean Winter rainfall Wintertime rainfall Atmospheric pressure Atmospheric temperature Climate change Financial data processing Locomotives Nickel compounds Ocean currents Railroad cars Rain Surface waters Principal component analysis annual variation atmospheric circulation climate variation El Nino-Southern Oscillation precipitation assessment principal component analysis rainfall Rossby wave sea surface temperature winter Andes Indian Ocean Indian Ocean (Tropical) Gonzalez, Marcela Hebe Vera, Carolina Susana On the interannual wintertime rainfall variability in the Southern Andes |
| topic_facet |
El niño southern oscillation Indian ocean Interannual variability Southern andes Southern annular mode Atmospheric circulation Climate variability Future applications Hydroelectric energy production Indian ocean Interannual Interannual variability Ocean surfaces Rossby wave Sea surface temperature anomalies Seasonal prediction Socio-economics South America Southern Annular Mode Southern Oscillation Tropical Indian ocean Winter rainfall Wintertime rainfall Atmospheric pressure Atmospheric temperature Climate change Financial data processing Locomotives Nickel compounds Ocean currents Railroad cars Rain Surface waters Principal component analysis annual variation atmospheric circulation climate variation El Nino-Southern Oscillation precipitation assessment principal component analysis rainfall Rossby wave sea surface temperature winter Andes Indian Ocean Indian Ocean (Tropical) |
| description |
The paper concentrates on the analysis of the interannual variability of wintertime rainfall in the Southern Andes. Besides the socio-economic relevance of the region, mainly associated with hydroelectric energy production, the study of the climate variability in that area has not received as much attention as others along the Andes. The results show that winter rainfall explains the largest percentage of regional total annuals. A principal component analysis (PCA) of the winter rainfall anomalies showed that the regional year-to-year variability is mostly explained by three leading patterns. While one of them is significantly associated with both the El Niño Southern Oscillation (ENSO), and the Southern Annular Mode (SAM), the other two patterns are significantly related to interannual changes of the sea surface temperature (SST) anomalies in the tropical Indian Ocean. Specifically, changes in the ocean surface conditions at both tropical basins induce in the atmospheric circulation the generation of Rossby wave trains that extend along the South Pacific towards South America, and alter the circulation at the region under study. The relationship between variability in the Indian Ocean and the Andes climate variability has not been previously addressed. Therefore, this result makes a significant contribution to the identification of the sources of predictability in South America with relevant consequences for future applications in seasonal predictions. © 2009 Royal Meteorological Society. |
| author |
Gonzalez, Marcela Hebe Vera, Carolina Susana |
| author_facet |
Gonzalez, Marcela Hebe Vera, Carolina Susana |
| author_sort |
Gonzalez, Marcela Hebe |
| title |
On the interannual wintertime rainfall variability in the Southern Andes |
| title_short |
On the interannual wintertime rainfall variability in the Southern Andes |
| title_full |
On the interannual wintertime rainfall variability in the Southern Andes |
| title_fullStr |
On the interannual wintertime rainfall variability in the Southern Andes |
| title_full_unstemmed |
On the interannual wintertime rainfall variability in the Southern Andes |
| title_sort |
on the interannual wintertime rainfall variability in the southern andes |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v30_n5_p643_Gonzalez http://hdl.handle.net/20.500.12110/paper_08998418_v30_n5_p643_Gonzalez |
| work_keys_str_mv |
AT gonzalezmarcelahebe ontheinterannualwintertimerainfallvariabilityinthesouthernandes AT veracarolinasusana ontheinterannualwintertimerainfallvariabilityinthesouthernandes |
| _version_ |
1768545606334152704 |