The difference in saturation vapor pressure between supercooled water and ice reaches a maximum at about -12^oC.This means that the ice crystal process will be most effective in producing precipitation when cloud temperatures are:

Question

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The maximum difference in saturation vapor pressure between supercooled water and ice indicates that at around -12°C, the ice crystal process is most effective in producing precipitation. Therefore, option B, around -12°C, is the correct choice. Option A, much colder than -12°C, would not be correct because the difference in saturation vapor pressure would gradually decrease as the temperature moves further away from -12°C. Option C, much warmer than -12°C, would also not be correct because the difference in saturation vapor pressure between supercooled water and ice would be much smaller, making the ice crystal process less effective in producing precipitation.

The Difference in Saturation Vapor Pressure Between Supercooled Water and Ice