• Modern_medicine_isnt@lemmy.world
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    7 months ago

    most likely due to varying depth. More shallow will stay warmer I believe because the earth holds temperature longer.

    Source: I have a ground source heat pump, which is equivalent to saying I stayed at a holiday inn last night. But it might still be true.

    • Rakonat@lemmy.world
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      7 months ago

      Shallow water freezes first. Ice acts as an insulator so deep water will get cold but not freeze.

      This is likely caused by vegetation at the bottom rotting and the gas rising up till it collects in on area, making the ice thinner and thus higher.

        • Rakonat@lemmy.world
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          7 months ago

          It has less insulation between the lowest point of the water and the cold air above it. All else being equal ice freezes to uniform thickness. The shallowest parts of a pond or river are the most likely to down to the ground. There’s several other factors, but the biggest one mostly comes down to how deep the water is and how fast its flowing if at all.