INVESTIGADORES
SRUR Ana Marina
artículos
Título:
Dendroclimatological reconstructions in South America: A review.
Autor/es:
BONINSEGNA J A; ARGOLLO J; ARAVENA J.C.; BARICHIVICH J.; CHRISTIE D.; FERRERO M. E.; LARA A.; LE QUESNE C.; LUCKMAN B. H.; MASIOKAS M.; MORALES M.; OLIVEIRA J. M.; F. A. ROIG JUÑET; SRUR A. M.; VILLALBA R.
Revista:
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2009 vol. 281 p. 210 - 228
ISSN:
0031-0182
Resumen:
Recent years have seen a consolidation and expansion of tree-ring sample collection across South America.
Most collections are concentrated in the temperate forests along the eastern and western slopes of the
Southern Andes (32°S to 55°S). However, important advances in the reconnaissance and collection of new
woody species useful for dendrochronology have recently been documented in new regions. The
development of chronologies in tropical and subtropical arid regions of the Cordillera, and in particular
the Bolivian Altiplano, is probably one of the most important recent advances in South American
dendrochronology. Polylepis tarapacana, growing at 40004500 m elevation on the Altiplano, has yielded
more than ten chronologies spanning the past 700 years. These records are highly correlated with summer
variations in climate. The development of chronologies in the humid subtropics and tropics remains a major
challenge. The number of tree-ring chronologies built up using species from these regions (ca. 40) is
comparatively low in relation to the extent of tropical forests. The recognition of strong climate signals in
tree rings from Cedrela species provides a unique opportunity to develop a tree-ring network in subtropical
and tropical South America. The future of dendroclimatology in South American tropical regions is perceived
as extremely promising.
Reconstructions of temperature, rainfall, streamflow, snow and regional atmospheric circulation based on
ring width, density and stable isotopes, have been conducted using tree-ring chronologies from subtropical
and temperate forests. These chronologies have also been used in studies relating South American tree rings
to high-resolution proxies from other continents, and studies analyzing past changes in atmospheric
circulation. The comparison of climatic reconstructions based on tree rings with projected atmospheric
circulation patterns provides a useful bridge between past and future trends in global climate change, and its
implications for human welfare and socio-economic development. Some examples of this bridging are
presented in this review.
Future research should continue the development of long tree-ring chronologies to improve detection of
decadal to centennial climatic variations and to distinguish between natural and human-induced climatic
changes in South America. Efforts to develop new tree-ring chronologies in the tropical lowlands should also
be encouraged. Collaboration among South American countries in training young scholars is crucial to
maintain and increase the progress of dendroclimatology in the region. Initiatives facilitating the interaction
between scientists from the Americas and overseas, such as done by the IAI and PAGES projects, should be
broadened and their long-term continuation assured.Polylepis tarapacana, growing at 40004500 m elevation on the Altiplano, has yielded
more than ten chronologies spanning the past 700 years. These records are highly correlated with summer
variations in climate. The development of chronologies in the humid subtropics and tropics remains a major
challenge. The number of tree-ring chronologies built up using species from these regions (ca. 40) is
comparatively low in relation to the extent of tropical forests. The recognition of strong climate signals in
tree rings from Cedrela species provides a unique opportunity to develop a tree-ring network in subtropical
and tropical South America. The future of dendroclimatology in South American tropical regions is perceived
as extremely promising.
Reconstructions of temperature, rainfall, streamflow, snow and regional atmospheric circulation based on
ring width, density and stable isotopes, have been conducted using tree-ring chronologies from subtropical
and temperate forests. These chronologies have also been used in studies relating South American tree rings
to high-resolution proxies from other continents, and studies analyzing past changes in atmospheric
circulation. The comparison of climatic reconstructions based on tree rings with projected atmospheric
circulation patterns provides a useful bridge between past and future trends in global climate change, and its
implications for human welfare and socio-economic development. Some examples of this bridging are
presented in this review.
Future research should continue the development of long tree-ring chronologies to improve detection of
decadal to centennial climatic variations and to distinguish between natural and human-induced climatic
changes in South America. Efforts to develop new tree-ring chronologies in the tropical lowlands should also
be encouraged. Collaboration among South American countries in training young scholars is crucial to
maintain and increase the progress of dendroclimatology in the region. Initiatives facilitating the interaction
between scientists from the Americas and overseas, such as done by the IAI and PAGES projects, should be
broadened and their long-term continuation assured.Cedrela species provides a unique opportunity to develop a tree-ring network in subtropical
and tropical South America. The future of dendroclimatology in South American tropical regions is perceived
as extremely promising.
Reconstructions of temperature, rainfall, streamflow, snow and regional atmospheric circulation based on
ring width, density and stable isotopes, have been conducted using tree-ring chronologies from subtropical
and temperate forests. These chronologies have also been used in studies relating South American tree rings
to high-resolution proxies from other continents, and studies analyzing past changes in atmospheric
circulation. The comparison of climatic reconstructions based on tree rings with projected atmospheric
circulation patterns provides a useful bridge between past and future trends in global climate change, and its
implications for human welfare and socio-economic development. Some examples of this bridging are
presented in this review.
Future research should continue the development of long tree-ring chronologies to improve detection of
decadal to centennial climatic variations and to distinguish between natural and human-induced climatic
changes in South America. Efforts to develop new tree-ring chronologies in the tropical lowlands should also
be encouraged. Collaboration among South American countries in training young scholars is crucial to
maintain and increase the progress of dendroclimatology in the region. Initiatives facilitating the interaction
between scientists from the Americas and overseas, such as done by the IAI and PAGES projects, should be
broadened and their long-term continuation assured.flow, snow and regional atmospheric circulation based on
ring width, density and stable isotopes, have been conducted using tree-ring chronologies from subtropical
and temperate forests. These chronologies have also been used in studies relating South American tree rings
to high-resolution proxies from other continents, and studies analyzing past changes in atmospheric
circulation. The comparison of climatic reconstructions based on tree rings with projected atmospheric
circulation patterns provides a useful bridge between past and future trends in global climate change, and its
implications for human welfare and socio-economic development. Some examples of this bridging are
presented in this review.
Future research should continue the development of long tree-ring chronologies to improve detection of
decadal to centennial climatic variations and to distinguish between natural and human-induced climatic
changes in South America. Efforts to develop new tree-ring chronologies in the tropical lowlands should also
be encouraged. Collaboration among South American countries in training young scholars is crucial to
maintain and increase the progress of dendroclimatology in the region. Initiatives facilitating the interaction
between scientists from the Americas and overseas, such as done by the IAI and PAGES projects, should be
broadened and their long-term continuation assured.