The Probable Impact of Global Change on the Water Resources of Patagonia, Argentina

Quintela, Rosa; Scarpati, Olga Eugenia; Spescha, Liliana Beatriz; Capriolo, Alberto Daniel

doi:10.1007/978-94-011-5676-9_23

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…In other cases, meltwater floods could reduce after an initial increase, as ice masses contract (e.g. Quintela et al, 1996).…”

Section: Effects On Snowmelt and Extreme Eventsmentioning

confidence: 99%

Climate change and sustainable water resources: placing the threat of global warming in perspective

Jones

1999

Hydrological Sciences Journal

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Predicted climate change over the coming decades is likely to add measurable stress to water resources in many regions of the world, including some areas that are currently well endowed. The stresses are likely to involve changes in the frequency of extreme events as well as gradual changes in mean annual net resources. The paper analyses these predictions. It also attempts to place them in context, first, comparing their impact with other major barriers to sustainability, such as increasing demand, wastage, poor water resources assessment and international conflict, and, secondly, considering the limitations of current predictive techniques. Modification climatique et durabilité des ressources en eau: dans la perspective d'une menace de réchauffement planétaireRésumé Les modifications climatiques devant se produire au cours des prochaines décennies devraient aggraver le stress hydrique dans de nombreuses régions du monde, y compris dans certaines d'entre elles actuellement bien pourvues en eau. On doit s'attendre à des modifications concernant aussi bien la fréquence des événements extrêmes que les modules annuels. Cet article s'intéresse à ces prédictions et s'efforce de les remettre en perspective, en comparant leurs impacts à ceux d'autres obstacles à la durabilité comme la croissance de la demande, les rejets, les incertitudes pesant sur l'évaluation des ressources et les conflits internationaux, mais aussi en prenant en considération les limites actuelles capacités de prédiction.

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“…In other cases, meltwater floods could reduce after an initial increase, as ice masses contract (e.g. Quintela et al, 1996).…”

Section: Effects On Snowmelt and Extreme Eventsmentioning

confidence: 99%

Climate change and sustainable water resources: placing the threat of global warming in perspective

Jones

1999

Hydrological Sciences Journal

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Tree-ring based reconstructions of northern Patagonia precipitation since AD 1600

Villalba

Cook²,

Jacoby³

et al. 1998

The Holocene

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Long-term reconstructions (400 years) of seasonal and annual precipitation variations were developed for northern Patagonia east of the Andes using a new set of 16 tree ring-width chronologies from Austrocedrus chilensis (D.Don) Endl. Reconstructions, which capture between 41 and 50% of the precipitation variance, show that the twentieth century contains the most extreme long periods of wetness and dryness in the past 400 years. Since about AD 1910, the reconstructions are also characterized by an increase in interannual variability and one of the highest rates of extreme events within the last 400 years. A prominent oscillation on the order of 2-2.1 years in length has been identified in the reconstructions using spectral analysis. Quasi-Biennial Oscillations have been shown to be very marked in some circulation indices of the Southern Hemisphere. Although significant oscillations within the preferred frequency domain of El Nino-Southern Oscillation (ENSO) are present in the reconstructions, no clear trod consistent responses to ENSO have been observed. Correlations of reconstructions with mean sea-level pressure around South America for the interval AD 1912-1984, reveal the influence of subtropical and high-latitude features of the atmospheric circulation on precipitation variations in northern Patagonia. Droughts result from an intensification of the subtropical Pacific anticyclone off the Chilean coast and the deepness of the circum-Antarctic trough over the South Orkney-Antarctic Peninsula sector. Mean sea-level pressure reconstructions for the South Atlantic sector of the Southern Oceans were used to evaluate the temporal stability of the relationships between northern Patagonia precipitation and high-latitude climatic variations since AD 1750. The influence of high-latitude circulation on precipitation appears to be more significant during the twentieth century, which in turn may respond to an intensification of wavenumbers 3 on the mean planetary wave structure over the Southern Hemisphere. Recent increase of precipitation variability in northern Patagonia may reflect stronger interactions between middle- and high-latitude atmospheric circulation in the Southern Hemisphere during the twentieth century

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The Probable Impact of Global Change on the Water Resources of Patagonia, Argentina

Cited by 2 publications

References 2 publications

Climate change and sustainable water resources: placing the threat of global warming in perspective

Climate change and sustainable water resources: placing the threat of global warming in perspective

Tree-ring based reconstructions of northern Patagonia precipitation since AD 1600

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