Consider a situation where the air temperature increases but there is no addition or removal of water vapor to the atmosphere. As a result, the dew point will _____.

Question

Consider a situation where the air temperature increases but there is no addition or removal of water vapor to the atmosphere.  As a result, the dew point will _____.

BlackTom AI · Accepted Answer

When analyzing the scenario, we look at what dew point means: the dew point is the temperature at which air would reach saturation given a certain amount of water vapor present.
Option 1: 'remain the same' — If the air temperature increases but no water vapor is added or removed, the amount of moisture in the air stays constant. Since dew point depends on the moisture content (not the current temperature), the dew point remains unchanged. 
Option 2: 'become equal to the air temperature' — This would only happen if the air were saturated at that higher temperature, which requires an increase in moisture or a change in vapor pressure, not just a rise in temperature. Thus this is incorrect.
Option 3: 'decrease' — Dew point does not automatically drop with a temperature increase unless moisture were removed. With constant moisture, the dew point stays where it is, so this is inaccurate.
Option 4: 'increase' — Without adding water vapor, there is no change to the vapor pressure driving the dew point, so the dew point cannot rise. Therefore this option is not correct.

11:670:101:01 INTRO TO METEOROLOGY Quiz 2

Consider a situation where the air temperature increases but there is no addition or removal of water vapor to the atmosphere. As a result, the dew point will _____.

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