Interannual variability in the Uruguay river basin

Autor:	Norberto O. García, Philip Jones, C. M. Krepper
Rok vydání:	2003
Předmět:	Atmospheric Science geography geography.geographical_feature_category Discharge Drainage basin Climatic variability Structural basin El Niño Southern Oscillation Climatology Streamflow parasitic diseases Precipitation Singular spectrum analysis geographic locations Geology
Zdroj:	International Journal of Climatology. 23:103-115
ISSN:	0899-8418
DOI:	10.1002/joc.853
Popis:	Both (El Nino-southern oscillation ENSO)-scale and near-decadal variations in precipitation and river flow have been noted in southeastern South America. Here we focus on the Uruguay river basin and its subcatchments. Both river flow and precipitation are analysed with singular spectrum analysis in an examination of how the signals of the subcatchments are related to the overall basin signal. The approximate 6 year signal and the 3.5 year ENSO signal are the two statistically significant peaks for the river flow. Both signals are present in all the available river flows, but only in the precipitation of the upper two-thirds of the basin. Precipitation in the lower part of the basin shows positive trends. The ENSO signal is strongly modulated at the secular time scale; we construct a simple sinusoidal model for this modulation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c34d6d1be7c5892ac3c2e147dcabf3f6 https://doi.org/10.1002/joc.853 Zobrazit plný text záznamu Plný text