Infrared photos, mostly by Cora Shea

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Warmer snow surface temperature above a buried bush. Click here to download.

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The snow surface on the southwest facing slopes of Mt. Smart are warmer than the surface on the northwest facing slopes. PM photo.

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A large temperature gradient exists in the thin snowpack above a rock. The snow is coarse grained depth hoar near the rock.

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Long wave radiation from the tree has warmed the snow surface near the tree

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Long wave radiation from the tree has warmed the snow surface near the tree.

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The bed surface and lower slab are cooler than the slab. ~ 10 minutes after the avalanche

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IR image of a crown fracture shows the temperature gradient in the slab. (Image taken ~5 min after avalanche)

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This photo of the buried rock that goes with three IR photos.

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A large temperature gradient exists in the depth hoar above a buried rock.

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The compressed snow under the ski tracks has conducted heat to the surface more than the uncompressed snow.

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IR image of a pit wall ~1 minute after shovelling, showing a cool layer sandwiched between two warmer layers

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Incoming short wave and strong outgoing low wave to a clear sky lead to max warming several cm below the snow surface

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