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Thermal images by Cora Shea. Click on image to download
Visual image of buried rock used for other IR images
Warm temperature near rock, cooler at snow surface. Large gradient above buried rock.
Composite IR image of snow over buried rock
Composite IR image of shallow snow over buried rock.
Large temperature gradient in snow over buried rock. Coarse grained depth hoar next to rock,
Snow surface warmed by long wave radiation from tree. AM and PM images.
Maximum warning below the snow surface. Top few cm cooler due to long wave radiation from surface to to clear sky
Snow surface warmed unevenly by subsurface branches.
IR photo of the crown of a slab avalanche ~5 minutes after it released. Bed surface is cooler than snow surface.
IR image of My. Smart from Mt Fidelity at mid-afternoon. SW facing slopes are warmer than NW facing slopes.
Warmer snow surface near top of coniferous tree.
The compressed snow under the ski tracks is warmer than the uncompressed snow adjacent to the tracks.
Close of of crown fracture showing cooler snow at bed surface. Image take ~ 10 minutes after avalanche.
Warmer snow sandwiched between cooler layers. Photo ~1 minute after wall was shovelled.
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