Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations
Under the current global warming trend, droughts are expected to increase, with serious implications for water resources management. This study analyzed the regional aspects of droughts in terms of streamflow deficiencies over the Andean rivers of Patagonia, Argentina. Based on the variable threshol...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19989563_v49_n1_p134_Rivera http://hdl.handle.net/20.500.12110/paper_19989563_v49_n1_p134_Rivera |
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paper:paper_19989563_v49_n1_p134_Rivera2023-06-08T16:32:54Z Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations Andes Climate forcings Patagonia Streamflow droughts Temporal variability Water resources Atmospheric pressure Climatology Drought Global warming Nickel Stream flow Time series Andes Climate forcings Inter-decadal variability Pacific decadal oscillation Patagonia Southern Annular Mode Temporal variability Water resources management Water resources annual variation climate forcing climate oscillation climate signal drought El Nino-Southern Oscillation global warming Pacific Decadal Oscillation streamflow temporal variation water resource Andes Argentina Patagonia Under the current global warming trend, droughts are expected to increase, with serious implications for water resources management. This study analyzed the regional aspects of droughts in terms of streamflow deficiencies over the Andean rivers of Patagonia, Argentina. Based on the variable threshold level method, the main characteristics of streamflow droughts were obtained for the hydrological years 1962/63-2014/15, considering three different severity levels over 11 representative basins. Two distinct regional behaviors were identified in terms of temporal variations of streamflow drought duration and its cumulative deficit volume, dividing the study area into North and Central Patagonia. The effects of the Southern Annular Mode (SAM), the El Niño-Southern Oscillation (ENSO), and the Pacific Decadal Oscillation (PDO) on the interannual and interdecadal variability of streamflow droughts were assessed through an empirical decomposition applied to the regional time series. These large-scale climatic oscillations have a distinct regional and temporal behavior in terms of the modulation of streamflow drought variability. Considering the interannual streamflow drought variability, the El Niño signal is more consistent and contributes with humid conditions, especially over North Patagonia. The multi-decadal component of the streamflow drought time series is linked to the upward trend in SAM, particularly over Central Patagonia. © IWA Publishing 2018. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19989563_v49_n1_p134_Rivera http://hdl.handle.net/20.500.12110/paper_19989563_v49_n1_p134_Rivera |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Andes Climate forcings Patagonia Streamflow droughts Temporal variability Water resources Atmospheric pressure Climatology Drought Global warming Nickel Stream flow Time series Andes Climate forcings Inter-decadal variability Pacific decadal oscillation Patagonia Southern Annular Mode Temporal variability Water resources management Water resources annual variation climate forcing climate oscillation climate signal drought El Nino-Southern Oscillation global warming Pacific Decadal Oscillation streamflow temporal variation water resource Andes Argentina Patagonia |
| spellingShingle |
Andes Climate forcings Patagonia Streamflow droughts Temporal variability Water resources Atmospheric pressure Climatology Drought Global warming Nickel Stream flow Time series Andes Climate forcings Inter-decadal variability Pacific decadal oscillation Patagonia Southern Annular Mode Temporal variability Water resources management Water resources annual variation climate forcing climate oscillation climate signal drought El Nino-Southern Oscillation global warming Pacific Decadal Oscillation streamflow temporal variation water resource Andes Argentina Patagonia Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| topic_facet |
Andes Climate forcings Patagonia Streamflow droughts Temporal variability Water resources Atmospheric pressure Climatology Drought Global warming Nickel Stream flow Time series Andes Climate forcings Inter-decadal variability Pacific decadal oscillation Patagonia Southern Annular Mode Temporal variability Water resources management Water resources annual variation climate forcing climate oscillation climate signal drought El Nino-Southern Oscillation global warming Pacific Decadal Oscillation streamflow temporal variation water resource Andes Argentina Patagonia |
| description |
Under the current global warming trend, droughts are expected to increase, with serious implications for water resources management. This study analyzed the regional aspects of droughts in terms of streamflow deficiencies over the Andean rivers of Patagonia, Argentina. Based on the variable threshold level method, the main characteristics of streamflow droughts were obtained for the hydrological years 1962/63-2014/15, considering three different severity levels over 11 representative basins. Two distinct regional behaviors were identified in terms of temporal variations of streamflow drought duration and its cumulative deficit volume, dividing the study area into North and Central Patagonia. The effects of the Southern Annular Mode (SAM), the El Niño-Southern Oscillation (ENSO), and the Pacific Decadal Oscillation (PDO) on the interannual and interdecadal variability of streamflow droughts were assessed through an empirical decomposition applied to the regional time series. These large-scale climatic oscillations have a distinct regional and temporal behavior in terms of the modulation of streamflow drought variability. Considering the interannual streamflow drought variability, the El Niño signal is more consistent and contributes with humid conditions, especially over North Patagonia. The multi-decadal component of the streamflow drought time series is linked to the upward trend in SAM, particularly over Central Patagonia. © IWA Publishing 2018. |
| title |
Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| title_short |
Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| title_full |
Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| title_fullStr |
Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| title_full_unstemmed |
Regional aspects of streamflow droughts in the Andean rivers of Patagonia, Argentina. Links with large-scale climatic oscillations |
| title_sort |
regional aspects of streamflow droughts in the andean rivers of patagonia, argentina. links with large-scale climatic oscillations |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19989563_v49_n1_p134_Rivera http://hdl.handle.net/20.500.12110/paper_19989563_v49_n1_p134_Rivera |
| _version_ |
1768542056242741248 |