Seattle pond
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Seattle pond |
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| We studied one of the melt
ponds at Seattle. Unlike the alpine pond, the surface of the Seattle pond
appeared to be at sea level. The pond grew deeper as the underlying ice
melted. To observe these changes, we strung a
reference line across the pond and periodically measured the water
depth and the distance to the ice bottom. Measurement uncertainties were mainly
due to the string sagging, giving errors of 2-3 cm in height. Fortunately,
we can correct for these errors since we know that the surface of the pond
is flat. The results of these
measurements are shown in the animation below. The gray shaded area is
ice, the blue is water, and the light blue is snow. The overall ice melt
is shown, along with changes in pond depth. This is also an animation for
an "alpine"pond.
Press Stop button on browser to end animation.
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| Selected profiles from the Seattle pond. |
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