Why is it that the rest of the river is frozen while the water under the bridge is not frozen? If anything, the water under the bridge should remain frozen, because it’s hidden from sunlight.
Why water unfrozen under bridge?
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Maybe the warm exhaust put off by cars driving over the bridge melt the ice on the river underneath.
but snow only falls on the exposed parts, hence adding coldness to the water. i don’t think sunlight has much warming effects – it doesn’t do much for the land snow.
i’m disappointed at the lack of additional theories postulated here to explain this phenomenon.
Bridges flow over troubled water. Thus, the troubled — or turbulent water — can’t stay still to form into ice. -D
I know why! The sun melted the ice on the bridge and the run off was just warm enough to melt the ice under it.
do they still have those weird magenta lights under the bridges? maybe the heat from those melted the ice.
The lights are green now. Wrigley even had some installed behind their building so practically the whole thing is one giant green monster. The lights melting the snow is a curious concept. I’d be willing to look into that a little further, especially since I haven’t come up with my own theory.
I miss those green lights.
Jeremy and Laura, you are brilliant. Two excellent theories. I like how they are very pratical and make sense. But has anyone taken the time to consider the possibility of an underground labyrinth of sea creatures? By the way, the lights under the Michigan Ave bridge, are either blue or magenta.
o
maybe there are electric eels under the water that heat up the ice.