Ice Elevation, Areal, and Frontal Changes of Glaciers from National Park Torres del Paine, Southern Patagonia Icefield

Figures & data

FIGURE 1. Southern Patagonia Icefield and study area. Figure adapted from Aniya et al. (1996) showing main glaciers of the SPI and ice divides. Glaciers flowing to the Pacific Ocean are in light gray. Glaciers contributing to the Atlantic Ocean are in dark gray. Dashed lines show areas where the ice divide is uncertain. Area in rectangle is shown in Figure 2

FIGURE 2. Landsat ETM+ satellite composite image with bands 1, 4, and 5 from October 2000. Main glacier basins are shown in black. The image is an enlargement of the rectangle shown in Figure 1

FIGURE 3. ASTER composite (bands 1, 2, and 3 Nadir) satellite image acquired in February 2003, with frontal variations of Glaciares Dickson, Frías, and Cubo. LIA indicates the Little Ice Age moraine estimated by correlation with similar moraines on Lago Grey (Marden and Clapperton, 1995). UTM coordinates are expressed in meters.FIGURE 4. ASTER composite (bands 1, 2, and 3 Nadir) satellite image of 2003 and frontal variations of Glaciares Olvidado, Los Perros, Ohnet, and U-2. UTM coordinates are expressed in meters.FIGURE 5. Landsat ETM+ composite image (bands 1, 4, and 5) of October 2000, with frontal variations of Glaciares Grey, Pingo, and Zapata. UTM coordinates are expressed in meters.FIGURE 6. Landsat ETM+ composite image (bands 1, 4, and 5) of October 2000, with frontal variations of the eastern ice front of Glaciar Tyndall. The control point “Alpha,” the Japanese profile surveyed since 1985 (Naruse et al., 1987) as well as the point measurements carried out by optical survey in 1999 are shown. LIA indicates the Little Ice Age moraine as defined by Aniya (1995). UTM coordinates are expressed in meters.FIGURE 7. Landsat ETM+ composite image (bands 1, 4 and 5) with frontal variations of the calving ice fronts of Glaciar Tyndall. UTM coordinates are expressed in meters

FIGURE 8. Ice elevation changes in meters at the ablation area of Glaciares Frías, Dickson, Olvidado, Cubo, and Grey between 1975 and 1995. UTM coordinates are expressed in meters

TABLE 1 Basic glacier information based on the Landsat ETM+ mosaic acquired in October 2000 and regular cartography of the IGM

TABLE 2 Characteristics of the cartographic data

TABLE 3 Aerial photographs

TABLE 4 Errors for each data set (m)

TABLE 5 Frontal variation (m a⁻¹) of Glaciar Dickson

TABLE 6 Frontal variations (m a⁻¹) of Glaciar Frías

TABLE 7 Frontal variations of glaciares Olvidado, Los Perros, Ohnet and U-2 (m a⁻¹)

TABLE 8 Frontal variations (m a⁻¹) of Glaciar Grey

TABLE 9 Frontal variations (m a⁻¹) of Glaciares Zapata and Pingo

TABLE 10 Frontal variations (m a⁻¹) of Glaciar Tyndall

TABLE 11 Ice area change rates 1945–2000

TABLE 12 Ice elevation change rates 1995–1975 (m a⁻¹)

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