查看文章

This study documents the use of dendrochronology for dating oscillations of glaciers and climatic changes related to them. The application of dendrochronological and dendroclimatological methods together allow improvement of the dating of Frías Glacier moraines Rio Negro, Argentina (41°10′S, 71°50'W), with a precision of a decade or even less. A minimum date for lateral and end moraines was obtained by counting the number of annual rings in the oldest trees growing on each moraine. Precise ages for ice positions were determined from trees that had been damaged by the glacier during its latest-Neoglacial advances. Moreover, due to the similarity found between climate models for tree-growth and glacier front fluctuations, a direct relationship was established between variations in tree-ring width indices of Fitzroya cupressoides Mol. Jhonst. and fluctuations of Frías Glacier front. Cool and wet summers …