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A first shallow firn core from Glaciar La Ollada on Cerro Mercedario in the Central Argentinian Andes

Publikation: Bidrag til tidsskriftTidsskriftartikel

  • D. Bolius
  • S. Schwikowski
  • Theo Manuel Jenk
  • H.W. Gäggeler
  • G. Casassa
In January 2003, shallow firn cores were recovered from Glaciar Esmeralda on Cerro del Plomo (33°14' S, 70°13' W; 5300 ma.s.l.), central Chile, and from Glaciar La Ollada on Cerro Mercedario (31°58' S, 70°07' W; 6070 ma.s.l.), Argentina, in order to find a suitable archive for paleoclimate reconstruction in a region strongly influenced by the El Niño-Southern Oscillation. In the area between 28° S and 35° S, the amount of winter precipitation is significantly correlated to the Southern Oscillation Index, with higher values during El Niño years. Glaciochemical analysis indicates that the paleo-record at Glaciar La Ollada is well preserved, whereas at Glaciar Esmeralda the record is strongly influenced by meltwater formation and percolation. A preliminary dating of the Mercedario core by annual-layer counting results in a time-span of 17 years (1986-2002), yielding an average annual net accumulation of 0.45 m w.e.
Udgivelsesdato: September
TidsskriftAnnals of Glaciology
Udgave nummer1
Sider (fra-til)14-22
Antal sider9
StatusUdgivet - 2006
Eksternt udgivetJa

ID: 11054367