2 April, 2002
Today, I stayed inside working on data calculations. For lunch, we joined a group of approximately 15 Deaf and Hard of Hearing residents for their Tuesday lunch gathering at the Deaf center. The Deaf community in Fairbanks is quite small compared to Portland. The Science Behind Ice Fractures
Ice is a solid form of water at freezing point (0 šC or 32 šF). At
this time of year, ice will react to temperature changes by expanding
at warmer temperatures and contracting at colder temperatures. Air
temperatures during the day is just above freezing point, whereas
still below freezing at night. This brings us to 2nd of 4 phase of
this research study.
On frozen ponds, human disturbance and snow depth increase ice
stress. Snow is quite heavy causing a lot of strain on ice. Ice
will eventually crack and water will seep through flowing into the
bottom of the snow cover. Over some time, slush will freeze adding a
new layer of ice on the surface
For Phases 1 through 3, we take our usual measurements to calculate heat flux as well as ice thickness. Without any snow in Phase 4, we only measure ice thickness to determine melting process (ice decay). See below samples of ice fractures.
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