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Figure 3.3. Examples of line scan images of ice cores from various depths. Each ice section is
1.65m long, 3 cm thick, and 8-9 cm wide. (a) Holocene ice, 1,354.65-1,356.30m depth. White
patches are most likely ice crystal interfaces within the ice. (b) Ice from the Younger Dryas,
1,504.80-1,506.45m depth. The bright layer at 1.33m relative depth is a volcanic ash layer. (c)
1,750.65-1,752.30m depth. (d) Ice from around the Last Glacial Maximum, 1,836.45-
1,838.10m depth. (e) Ice from a sharp climatic transition (IS19) at 2,534.40-2,536.05m depth.
(f ) Ice from the cold period preceding IS19 at 2,537.70-2,539.35m depth. (g) Microfolding
starts to appear below 2,600m, 2,651.55-2,653.20m depth. (h) 2,899.05-2,900.70m depth,
overall horizontal layering is still obvious, but individual cloudy bands are not distinguishable.
(i) 3,017.30-3,018.95m depth, the grain boundaries of large crystals are visible (Svensson et al.,
2005).
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