A parcel of air has a current temperature of 25° C and the amount of water vapor in the air is 15 grams / cubic meter. Study the graph above and answer the following questions: What is the current water vapor capacity of the parcel? ______________ What is the relative humidity of the parcel? Show calculation; _______________ What is the dew point of the parcel? __________________ The temperature is expected to fall to 15°C tonight. Will it rain? ___________ What data supports your answer? Absolute humidity is the percentage of water vapor in the air at any given time. The absolutehumidity varies from 0-5%.However when the weatherman discusses humidity, he is referring to relative humidity:RELATIVE HUMIDITY = the amount of water vapor in the air (grams /cubic meter)the water vapor capacity of the air (grams/ cubic meter)The water vapor capacity of a parcel of air varies with temperature. Warm air can hold more watervapor than cold air before it reaches its capacity. At capacity, a parcel is saturated (full).The temperature at which a parcel is saturated is called the dew point. The dew point dependsupon the amount of water vapor in the air.When the temperature of a parcel cools to the dew point, the relative humidity of the parcel is100%. Under normal conditions, relative humidity cannot exceed 100%. Therefore, when a parcelis cooled below its dew point, it must release its excess water vapor. The excess vapor condensesfrom its gaseous state to its liquid state and we have: clouds, fog or rain.Water Vapor Capacity (gr/m3)40221680++++++++-5 0 5 10 15 20 25 30 35Dewpoint Temperature CExample: A parcel of air has a current temperature of 25° C and the amount of water vapor in theair is 15 grams / cubic meter. Study the graph above and answer the following questions:What is the current water vapor capacity of the parcel?What is the relative humidity of the parcel? Show calculation;__What is the dew point of the parcel?The temperature is expected to fall to 15°C tonight. Will it rain?What data supports your answer?

In meteorology, we frequently treat 'pockets of air' likewise to expanding. We refer to these…

Answered: A parcel of air has a current…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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A parcel of air has a current temperature of 25° C and the amount of water vapor in the
air is 15 grams / cubic meter. Study the graph above and answer the following questions:

What is the current water vapor capacity of the parcel? ______________
What is the relative humidity of the parcel? Show calculation; _______________
What is the dew point of the parcel? __________________

The temperature is expected to fall to 15°C tonight. Will it rain? ___________
What data supports your answer?