Question

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how might the melting of glaciers impact earths climate system?
the melting of glaciers exposes darker land and water surfaces, which absorb more heat, raising global temperatures.
the melting of glaciers results in more solar energy being reflected back into space, which cools the earth.
the melting of glaciers increases ocean salinity, which directly decreases global sea temperatures.
the melting of glaciers increases the amount of oxygen in the atmosphere, which reduces global warming.

Explanation:

When glaciers melt, the darker land and water surfaces that are exposed have a lower albedo (reflectivity) compared to ice. They absorb more solar - heat, which in turn raises global temperatures. Melting glaciers do not increase solar energy reflection (this would cool the Earth), do not directly decrease sea temperatures by increasing salinity, and do not increase atmospheric oxygen to reduce global warming.

Answer:

The melting of glaciers exposes darker land and water surfaces, which absorb more heat, raising global temperatures.