La Revista Digital 1 Versión Final Revista No. 2 - Prueva | Page 35

A Qualitative Assessment of Contemporary Glacier Loss in the Cordillera Blanca, Peru, Using Repeat Photography
Figure 5. Yanapacha panorama in 2009. Although snow had accumulated at the ice line due to a recent storm, recession and
thinning of the glacier has clearly continued in the 11-year interval. Photo: A. Byers.
Figure 4. Yanapacha in 1998. The red line traces the 1939 ice
cover when photographed by Schneider. The blue line shows
the extent of its recession in the 59-year interim period. Such
perspectives can add decades to the insights derived from
satellite-based remote sensing, which only became available
in the early 1970s. Photo: A. Byers.
Pucaranracocha (Figuras 6-7)
Figure 6. Pucaranracocha glacier, Quebrada Honda, in 1932.
Note that a small glacial lake had already begun to form at
the time. The recession of Peruvian glaciers some 80-100
years before glaciers elsewhere in the world can be linked to
their exposed (non-debris covered) surfaces, low gradients
that encourage the formation of lakes, lower altitudes, and
lower latitudes. Photo: H. Kinzl.
Revista de Glaciares y Ecosistemas de Montaña 2 (2017): 31-40
Figure 7. Pucaranracocha glacier in 2009. The red line shows
the extent of the 1932 glacier; the blue line, the extent of the
2009 ice. The exact same photopoint was not possible to locate
because of the growth of the lake in the interim period. Photo:
A. Byers.
33