PrepTest 88, Section 2, Question 23
The effects of global warming on the polar ice caps have been studied with computer models. According to some models, if the global temperature increases by as little as two degrees Celsius, the seawater will rise to a temperature that could melt the ice caps considerably. However, those models also show that under such a scenario, the volume of the ice caps would increase, not shrink.
The effects of global warming on the polar ice caps have been studied with computer models. According to some models, if the global temperature increases by as little as two degrees Celsius, the seawater will rise to a temperature that could melt the ice caps considerably. However, those models also show that under such a scenario, the volume of the ice caps would increase, not shrink.
The effects of global warming on the polar ice caps have been studied with computer models. According to some models, if the global temperature increases by as little as two degrees Celsius, the seawater will rise to a temperature that could melt the ice caps considerably. However, those models also show that under such a scenario, the volume of the ice caps would increase, not shrink.
The effects of global warming on the polar ice caps have been studied with computer models. According to some models, if the global temperature increases by as little as two degrees Celsius, the seawater will rise to a temperature that could melt the ice caps considerably. However, those models also show that under such a scenario, the volume of the ice caps would increase, not shrink.
Which one of the following, if true, would most help to resolve the apparent paradox described above?
As global temperatures increase, more seawater evaporates into the atmosphere, thereby leading to increased snowfall at the polar caps, which then melts and refreezes as ice.
As global temperatures increase, more seawater evaporates into the atmosphere, thereby lowering the ocean level, which then results in less contact between the ice caps and the warmer water, thereby stabilizing the size of the ice caps.
As sea temperatures increase, the difference in temperature between the polar ice caps and the adjacent water becomes greater, which in turn causes the water to melt the ice it contacts at a faster rate.
As sea temperatures increase, evaporation of seawater causes the concentration of salt in the water to increase, which thereby lowers the temperature needed to freeze the seawater.
As global temperatures increase, more seawater evaporates into the atmosphere, thereby leading to increased cloud formation, which causes smaller variations between the average temperatures of the earth's hottest climates and those of its coldest climates.
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