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Need help with my writing homework on #6 Dew Point. Write a 500 word paper answering; Dew Point There are a number of ways to report atmospheric moisture or the amount of water in the atmosphere. One of these ways is by measuring the dew point temperature or simply the dew point. People react differently to different dew point temperatures and thus, it is important to know exactly how this value is measured.
The dew point temperature, or simply the dew point, represents the temperature to which air must be cooled in order for saturation to occur, while the air pressure or moisture content remains constant (Ahrens 2008). In other words, it is the point where water vapor condenses and turns into dew. The dew point is a recommended indicator of the actual water vapor content of the air because variations in atmospheric pressure at the earth’s surface are quite minimal.
Dew point is measured by an instrument called a Dew Point Meter. These instruments have a polished metal mirror which is cooled as air passes over it (Hens 2007). Essentially, the dew point is determined by finding out the temperature at which dew forms. These manual devices may also be used to standardize other types of instruments that measure humidity. Moreover, automatic sensors may be utilized in a control loop where a humidifier or a dehumidifier is used to manage the dew point of the air in a building or in smaller spaces used for manufacturing processes (Hens, 2007).
A high dew point indicates that the air has high water vapor content while a low dew point indicates that the air has low water vapor content. When the air has high water vapor content and, correspondingly, a high dew point, it is said that the air is humid and people are most likely uncomfortable with such situations. This is because a person’s body is designed to use the evaporation of sweat to cool itself down during warm temperatures. However, evaporation largely depends on how much moisture the air already contains and how much more it can hold (Sills 2010). Thus, if the air is already saturated, a person’s sweat will no longer evaporate and so that person ends up sweating profusely. At certain cases where dew point is quite elevated, people suffering from respiratory ailments like asthma may even be in grave danger.
The dew point is considered to be an important indicator of the atmosphere’s condition. It affects the living conditions of humans and animals alike and thus, it must be monitored closely using accurate instruments in order to provide necessary and appropriate advice to those who might need it.
References
Ahrens, D. (2008). Essentials of meteorology: an invitation to the atmosphere. Cengage Learning.
Hens, H. (2007). Building physics - heat, air and moisture: Fundamentals and engineering. Ernst & Sohn.
Sills, A. (2010). E-Z Earth science. Barrons Educational Series.
