IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
20th-century glacier recession and regional hydroclimatic changes
Autor/es:
MASIOKAS, M.; VILLALBA, R.; LUCKMAN, B.; LASCANO M.; DELGADO, S.; STEPANEK, P.
Revista:
GLOBAL AND PLANETARY CHANGE
Editorial:
Elsevier
Referencias:
Año: 2008 p. 85 - 100
ISSN:
0921-8181
Resumen:
Abstract
This paper documents the occurrence of significant glacier and hydroclimatic changes in northwestern Patagonia during the past
century. Drastic, widespread glacier recession is documented by repeat photography of some of the earliest glacier images from
southern South America. Linear trends in regionally-averaged annual and seasonal temperature and precipitation records indicate
significant warming and decreasing precipitation over the 19122002 interval. A climatic index is developed, based on winter
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
2002 interval. A climatic index is developed, based on winter
precipitation and summer temperature records, that mimics glacier mass balance relationships and shows a strong negative trend
which agrees with the drastic glacier recession shown by the photographic comparisons. Short positive periods of this climatic index
broadly correspondwith known evidence of glacier advances in the region.Regionally-averaged mean annual streamflowrecords east of
themountains were used in an independent verification check of the climatic series used in this study. This regional runoff record shows a
strong negative trend, remarkable similarities with the climatic index, and highly significant positive (negative) correlations with the
regional precipitation (temperature) series. This highlights the existence of a strong, regionally coherent hydroclimatic signal across this
region and supports the utility of these records as environmental indicators for northwestern Patagonia between ca. 38° and 45°S. Given
the significant socio-economic importance of rivers and glaciers in this area, further research is needed to evaluate the full range of natural
hydroclimate variability and improve understanding of potential impacts of the futurewarmer and drier climates projected for this region.
© 2007 Elsevier B.V. All rights reserved.
Keywords: North Patagonian Andes; repeat photography; glacier recession; hydroclimatic variabilityNorth Patagonian Andes; repeat photography; glacier recession; hydroclimatic variability