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Recent variations of Pio XI glacier
(Period) Frontal variation rate in m a-1
Sources
(1830 – 1925) 62
RIVERA et al., in press
(1925 – 1926) 1000
AGOSTINI, 1945
(1926 – 1928) Stable with small advance
RIVERA, 1992
(1928 – 1945) –147
RIVERA et al. 1997 a
Southern arm
Northern arm
Source for the 
southern arm
Source for the 
northern arm
(1945 – 1951) 750
(1945-1975) 130
RIVERA et al. 1997 a
WARREN et al. 1997
(1951 – 1969) 142
RIVERA et al. 1997 a
(1969 – 1976) 345
RIVERA et al. 1997 a
(1976 – 1981) 120
(1975-1981) 83
RIVERA et al. 1997 a
WARREN et al. 1997
(1981 – 1985) –300
(1981-1984) 100
    RIVERA et al. 1997 a
WARREN et al. 1997
(1985 – 1992) 180
(1984-1993) 89
RIVERA et al. 1997 a
WARREN et al. 1997
(1992 – 1993) 400
RIVERA et al. 1997 a
(1993 – 1994) 1,000
(1993-1994) 800
RIVERA et al. 1997 b
WARREN et al. 1997
(1994 – 1995) –800
(1994-1995) 

(1995/2000) -432
RIVERA et al. 1997 b
RIVERA et al., in press
(1995 – 2000) Stable with small retreat
RIVERA et al., 2000
(2000-2001) 104 (2000-2001) -39 RIVERA et al., in press RIVERA et al., in press
(2001-2005) 681 (2001-2005) -329 RIVERA et al., in press RIVERA et al., in press
The following photographs were obtained on Pio XI glacier, from approximately the same loction. All of them are looking to the east. Note the inflections of the central moraines and the changes between dates. (All photographs by Andrés Rivera)
piovista92 copy.jpg (26047 bytes)
1992/January

vistapio93 copy.jpg (20916 bytes)
1993/November

vistapio95_copy.jpg (19608 bytes)
1995/November

pioxiglacier copy.jpg (50186 bytes)
Glaciologic map of Pio XI glacier, based upon 1995 aerial photographs. The thick solid line represents the temporal snow line (May-1995). Arrows, indicate the ice flow directions. Dotted lines, show ogives. Crevasses are indicated by thin solid lines. 


Pio XI glacier panel included in the exhibition mounted at the Phillippi Museum, Valdivia


Síntesis de variaciones recientes (Rivera et al, in press)

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