Multiple Choice QuestionMelting of polar ice represents a positive feedback in climate warming because Blank______.Multiple choice question.open water supports fisheries, creating a more positive situation for food websopen water has a lower albedo than ice, increasing heat storageice surfaces tend to expand every year, so that more ice produces rapid ice expansion
Question
Multiple Choice QuestionMelting of polar ice represents a positive feedback in climate warming because Blank______.Multiple choice question.open water supports fisheries, creating a more positive situation for food websopen water has a lower albedo than ice, increasing heat storageice surfaces tend to expand every year, so that more ice produces rapid ice expansion
Solution
The correct answer is "open water has a lower albedo than ice, increasing heat storage".
This is because albedo is a measure of how much light that hits a surface is reflected back without being absorbed. Ice, being white, has a high albedo, meaning it reflects a lot of the sunlight that hits it back into space. Open water, being darker, has a lower albedo, meaning it absorbs more of the sunlight that hits it, converting it into heat.
So when polar ice melts, it turns into open water, which absorbs more heat, which in turn causes more ice to melt, creating a positive feedback loop that accelerates climate warming.
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