CIMA 09099
CENTRO DE INVESTIGACIONES DEL MAR Y LA ATMOSFERA
Unidad Ejecutora - UE
artículos
Título:
On the interannual wintertime rainfall variability in the Southern Andes.
Autor/es:
GONZALEZ, MARCELA; VERA, CAROLINA
Revista:
INTERNATIONAL JOURNAL OF CLIMATOLOGY
Editorial:
Royal Meteorologial Society-Wiley Interscience
Referencias:
Lugar: Reading, Gran Bretaña; Año: 2010 vol. 30 p. 643 - 657
ISSN:
0899-8418
Resumen:
The paper concentrates on the analysis of the rainfall interannual variability in the Southern Andes.Besides the socio-economic relevance of the regions, mainly associated with hydroelectric energyproduction, the study of the climate variability in that region has not received as much attention asother regions of the Andes. Results found that winter rainfall explains the largest percentage ofregional total annuals. A principal component analysis of the winter rainfall anomalies showed thatthe regional year-to-year variability is mostly explained by three leading patterns. While one ofthem is significantly associated with both, El Niño Southern Oscillation (ENSO), and, theAntarctic Oscillation (AAO), the other two patterns are related significantly with interannualchanges of the sea surface temperature (SST) anomalies in the tropical Indian Ocean. The laggedrelationship between variability in the Indian Ocean and the Andes climate variability has not beenpreviously addressed yet. Therefore, such result makes a significant contribution to theidentification of the sources of predictability in South America with relevant consequences forfuture applications in seasonal predictions.
