Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina
During the period 2010-2015, the semi-arid Central Andes in Argentina (CAA) experienced one of the most severe and long-lasting hydrological droughts on record. Since the snowmelt is the most important source of water, the reduced snowfall over the mountains propagated the drought signal through the...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_20734441_v9_n9_p_Rivera |
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todo:paper_20734441_v9_n9_p_Rivera2023-10-03T16:39:13Z Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina Rivera, J.A. Penalba, O.C. Villalba, R. Araneo, D.C. Argentina Central Andes Drought Hydroclimatic variability Hydrological drought Semi-arid region Snowmelt Standardized streamflow index Streamflow Water resources Economics Snow Snow melting systems Stream flow Water resources Argentina Central Andes Hydroclimatic variability Hydrological droughts Semi-arid region Snowmelt Standardized streamflow indices Drought climate variation drought extreme event heterogeneity mountain region semiarid region snowmelt socioeconomic conditions spatiotemporal analysis streamflow water resource Andes Argentina Pacific Ocean Pacific Ocean (Tropical) During the period 2010-2015, the semi-arid Central Andes in Argentina (CAA) experienced one of the most severe and long-lasting hydrological droughts on record. Since the snowmelt is the most important source of water, the reduced snowfall over the mountains propagated the drought signal through the streamflows in the adjacent foothills east of the Andes ranges. Motivated by the widespread impacts on the socio-economic activities in the region, this study aims to characterize the recent hydrological drought in terms of streamflow deficits. Based on streamflow data from 20 basins, we used the standardized streamflow index (SSI) to characterize hydrological droughts during the period 1971-2016. We found that the regional extent of the 2010-2015 hydrological drought was limited to the basins located north of 38° S, with mean duration of 67 months and maximum drought severity exhibiting a heterogeneous pattern in terms of spatial distribution and time of occurrence. The drought event reached extreme conditions in 14 of the 15 basins in the CAA, being record-breaking drought in six of the basins. This condition was likely driven by a cooling in the tropical Pacific Ocean resembling La Niña conditions, which generated a decrease in snowfall over the Andes due to suppressed frontal activity. © 2017 by the authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20734441_v9_n9_p_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 |
Argentina Central Andes Drought Hydroclimatic variability Hydrological drought Semi-arid region Snowmelt Standardized streamflow index Streamflow Water resources Economics Snow Snow melting systems Stream flow Water resources Argentina Central Andes Hydroclimatic variability Hydrological droughts Semi-arid region Snowmelt Standardized streamflow indices Drought climate variation drought extreme event heterogeneity mountain region semiarid region snowmelt socioeconomic conditions spatiotemporal analysis streamflow water resource Andes Argentina Pacific Ocean Pacific Ocean (Tropical) |
| spellingShingle |
Argentina Central Andes Drought Hydroclimatic variability Hydrological drought Semi-arid region Snowmelt Standardized streamflow index Streamflow Water resources Economics Snow Snow melting systems Stream flow Water resources Argentina Central Andes Hydroclimatic variability Hydrological droughts Semi-arid region Snowmelt Standardized streamflow indices Drought climate variation drought extreme event heterogeneity mountain region semiarid region snowmelt socioeconomic conditions spatiotemporal analysis streamflow water resource Andes Argentina Pacific Ocean Pacific Ocean (Tropical) Rivera, J.A. Penalba, O.C. Villalba, R. Araneo, D.C. Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| topic_facet |
Argentina Central Andes Drought Hydroclimatic variability Hydrological drought Semi-arid region Snowmelt Standardized streamflow index Streamflow Water resources Economics Snow Snow melting systems Stream flow Water resources Argentina Central Andes Hydroclimatic variability Hydrological droughts Semi-arid region Snowmelt Standardized streamflow indices Drought climate variation drought extreme event heterogeneity mountain region semiarid region snowmelt socioeconomic conditions spatiotemporal analysis streamflow water resource Andes Argentina Pacific Ocean Pacific Ocean (Tropical) |
| description |
During the period 2010-2015, the semi-arid Central Andes in Argentina (CAA) experienced one of the most severe and long-lasting hydrological droughts on record. Since the snowmelt is the most important source of water, the reduced snowfall over the mountains propagated the drought signal through the streamflows in the adjacent foothills east of the Andes ranges. Motivated by the widespread impacts on the socio-economic activities in the region, this study aims to characterize the recent hydrological drought in terms of streamflow deficits. Based on streamflow data from 20 basins, we used the standardized streamflow index (SSI) to characterize hydrological droughts during the period 1971-2016. We found that the regional extent of the 2010-2015 hydrological drought was limited to the basins located north of 38° S, with mean duration of 67 months and maximum drought severity exhibiting a heterogeneous pattern in terms of spatial distribution and time of occurrence. The drought event reached extreme conditions in 14 of the 15 basins in the CAA, being record-breaking drought in six of the basins. This condition was likely driven by a cooling in the tropical Pacific Ocean resembling La Niña conditions, which generated a decrease in snowfall over the Andes due to suppressed frontal activity. © 2017 by the authors. |
| format |
JOUR |
| author |
Rivera, J.A. Penalba, O.C. Villalba, R. Araneo, D.C. |
| author_facet |
Rivera, J.A. Penalba, O.C. Villalba, R. Araneo, D.C. |
| author_sort |
Rivera, J.A. |
| title |
Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| title_short |
Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| title_full |
Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| title_fullStr |
Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| title_full_unstemmed |
Spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the Central Andes, Argentina |
| title_sort |
spatio-temporal patterns of the 2010-2015 extreme hydrological drought across the central andes, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_20734441_v9_n9_p_Rivera |
| work_keys_str_mv |
AT riveraja spatiotemporalpatternsofthe20102015extremehydrologicaldroughtacrossthecentralandesargentina AT penalbaoc spatiotemporalpatternsofthe20102015extremehydrologicaldroughtacrossthecentralandesargentina AT villalbar spatiotemporalpatternsofthe20102015extremehydrologicaldroughtacrossthecentralandesargentina AT araneodc spatiotemporalpatternsofthe20102015extremehydrologicaldroughtacrossthecentralandesargentina |
| _version_ |
1807322364585705472 |