Casassa, G. & Rivera, A. (1998) : "Radio-Echo Sounding at Tyndall Glacier, Patagonia" Anales Instituto Patagonia, Serie Cs. Nat., 26:129-135.

Radar data collected in 1993 with a portable digital system at Tyndall Glacier, Southern Patagonia Icefield are analyzed. Point measurements were carried out along a transverse profile on the ablation area of the glacier, which is 8 km wide in this section. Clear bottom returns were received on t...


Carrasco, J., Casassa, G. & Rivera, A. (1998) : "Climatología actual del Campo de Hielo Sur y posibles Cambios por el Incremento del Efecto Invernadero" Anales Instituto Patagonia, Serie Cs. Nat., 26:119-128.

El Campo de Hielo Sur (CHS) con una extensión promedio de 13.000 km², se encuentra ubicado entre los 48 y 51°S en la región sur austral de Sudamérica, la cual está predominada por el flujo del oeste de las latitudes medias, viédose afectada frecuentemente por el paso de depresiones frontales, lo ...


Rivera, A., Aravena, J. & Casassa, G. (1997) : "Recent Fluctuations of Glaciar Pío XI, Patagonia: Discussion of a Glacial Surge Hypothesis" Mountain Research and Development, 17(4): 309-322.

The Southern Patagonia Icefield remains one of the least studied glacial areas in the world, although it is one of the largest mid-latitude ice bodies. The largest glacier, Glaciar PíO XI, located on the western maritime side, has been advancing during the last 50 years. In 1993 the tidewater fro...


Warren,C.R., Rivera,A. & Post,A. (1997) : "Greatest Holocene Advance of Glaciar Pío XI, Chilean Patagonia: Possible causes" Annals of Glaciology, 24:11-15.

Glaciar Pío XI (or Glaciar Brüggen) may be the only glacier in the world currently at its Neoglacial maximum. During the 20th century, most glaciers in Patagonia have consistently retreated, whereas Glaciar Pio XI has advanced almost 10 km, most recently at rates of ≤ 1.5 m d-1. This advance cann...


Casassa, G., Brecher, H., Rivera, A. and Aniya, M. (1997) : "A Century-long Recession Record of Glaciar O'Higgins, Chilean Patagonia" Annals of Glaciology, 24:106-110.

Most glaciers in Patagonia are retreating rapidly. Glaciar O'Higgins, a freshwater calving glacier, has experienced the largest retreat rate of all, as measured from 1945 to 1986 (Aniya and others, 1992). Based on historical maps, early exploration reports and recent aerial photography, the front...


Rivera,A., Lange,H., Aravena,J. & Casassa,G. (1997) : "The 20th Century Advance of Glaciar Pío XI, Southern Patagonia Icefield" Annals of Glaciology, 24:66-71.

Glaciar Pio XI, the largest glacier in South America, has experienced an advance during th 20th century, unlike virtually all other glaciers in Patagonia, which are retreating rapidly. Climatological records of the last 80 years are analyzed together with ice-velocity and meteorological measureme...


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