Relative Humidity and Dewpoint explanation

I am finally posting a link with an in-depth explanation of relative humidity and dewpoint in response to an earlier request. Relative humidity is a highly variable quantity dependent on pressure and temperature. RH can be thought of as a ratio of the mass of water vapor in the atmosphere compared to what that mass would be if the atmosphere was saturated. The dewpoint (or dewpoint temperature) is the temperature that the atmosphere would have to cool to in order to reach saturation. When temperature and dewpoint are the same, the atmosphere is saturated and the RH is 100%. However, there is more to it than just this, so to avoid typing a dissertation on the subject, I’ll just refer to the link.

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