INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
La respuesta de los glaciares Argentinos al clima de los siglos XX y XXI
J. C. LEIVA, L.E. ESPIZUA, R. ITURRASPE, M. MASIOKAS, F.A. NORTE AND R. VILLALBA
Servizio Glaciologico Lombardo
Lugar: Milan; Año: 2007
Abstract The glaciers along the Cordillera de los Andes in Argentina have retreated during the last 100 years. The glaciers in the Central Andes (30º-35ºS), have undergone a marked recession since 1894, and within this general retreat the glaciers advanced or remained nearly stationary. The glaciers in Patagonia, (39º-43ºS) have retreated during the last century and their behaviour agree with the trends to more warmest-driest conditions during the XX century, taking into account the regional records of temperature and precipitation based on instrumentals data and records of tree-rings. In Patagonia, the southern part of South America, numerous outlet glaciers discharges from the ice fields in all directions The glacier terminus of some glaciers in Hielo Patagónico Norte (centered around 47ºS) ) have retreated during the last half XX century. In Hielo Patagónico Sur (48º20´-51º30´S), the Glaciar Upsala showed a marked recession, and Glaciar Perito Moreno advanced from 1900 to 1917 damming the Brazo Rico of Lago Argentino, and since 1930 remained near stationary; its front frequently advanced or retreated only few metres. The glacier is well-known for the repeated damming-up of Lake Brazo Rico. The glaciers in the northern and eastern sides of Cordillera Darwin (55ºS), have been shrinking during the XX century, but they have remained stationary or have advanced in the southern side of the Cordillera.