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What is the meaning of Dew? Concept, Definition of Dew

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Dewpoint: Compendium of definitions and concepts

Definition of dew

The dew is a fisico-meteorologico phenomenon in which moisture in the air condenses in the form of drops by the sudden decrease of the temperature, or contact with cold surfaces. Discusses dew in general when the vegetation cover of the soil is condensation on a surface, usually.
Given a system at a given temperature, there is a unique such steam than phases of liquid and gaseous water pressure are in balance (or coexist) and is called the saturation vapor pressure. Saturation vapour pressure increases as it increases the temperature to which the system is following the Clausius-Clapeyron relation. Saturation is not a property of air. In the atmosphere, the system is conformed by dry air more water vapor (which make up what we call air). Since the air is in thermal equilibrium, the air temperature is also the temperature of the steam and liquid water containing this. The temperature that the system is saturated is called dew temperature. If the system reaches this temperature, and it is above 0 ° C, then the dew on different surfaces will be observed and, if weather conditions occur, could also be observed mists or fogs.
One of the forms of production of dew has to do with the nighttime cooling of the ground (and adjacent air layer) due to the net loss of energy by emission of infrared radiation. This loss of energy is greater in clear and cold nights when clouds greenhouse effect doesn't exist, making it possible to reach the saturation point, forming dew. If the air temperature is less than 0 ° C or the freezing point of water, then instead of spray Frost forms. The physical phenomenon is the same although the physical properties are different (for example, the value of saturation steam is different if it is considered with respect to the ice that in respect of liquid water).


Concept of dew

Dew. Vapor that condenses in the atmosphere into very tiny droplets, which then appear on the surface of the Earth, plants or any other surface with the cold of the night.
The air contains some amount of water, some moisture. This moisture can be higher or lower, depending on the temperature to which the air is.
Dew occurs because, when the air undergoes a sudden decrease of temperature it is unable to accommodate so much water, which is deposited on what it touches, leaves, flowers, walls etc, in the form of small droplets. It is a physical phenomenon in which moisture in the air condenses in the form of drops.
It normally occurs in time calm and clear nights, when the cold from the ground is transmitted to the air. The opposite physical process is called evaporation.
One of the forms of production of dew has to do with the nighttime cooling of the ground (and adjacent air layer) due to the net loss of energy by emission of infrared radiation. This loss of energy is greater in clear and cold nights when clouds greenhouse effect doesn't exist, making it possible to reach the saturation point, forming dew.
If the air temperature is less than 0 ° C or the freezing point of water, then instead of spray Frost forms. The physical phenomenon is the same although the physical properties are different (for example, the value of saturation steam is different if it is considered with respect to the ice that in respect of liquid water). In the atmosphere, the system is conformed by dry air more water vapor. As the air is in thermal equilibrium, the air temperature is also the temperature of the steam and liquid water containing this.


Definition of dew

The term spray is used to refer to the phenomenon that takes place in nature when the humidity of the atmosphere is condensed into the early hours of the morning and which materializes in the form of small droplets on the leaves of the plants and other surfaces. In addition to its usefulness and its specific function within the natural world, dew has always generated admiration in humans since it represents one of the signs of the beginning of a new day and its delicacy is undoubtedly an element of great beauty.
In physical terms, the dew is simply the humidity in the atmosphere condensed in the form of drops onto different surfaces such as the leaves of the plants. This happens primarily as a result of the notorious temperature reduction that occurs in the evening and that becomes visible in the dawn. The temperature of surfaces covered with dew is that descends and thus the moisture that is in the gaseous state during the day materializes in the night and early morning hours as small droplets. In many cases, if the temperature is low enough, the spray can reach into frost.
Dew takes place year-round, but summer days in which night temperature does not drop much, only tends to form on the surface of the plants that are not exposed directly or excessive heat from the Sun, such as grass, roots and some low wings. On the other hand, the dew never comes to be sufficient as to exceed a measurable amount of 0.8 mm per night, not allowing it compare with the levels of mm or effects that rain might have on the surface.


Concept of dew

Dew is a natural, physical, and meteorological, phenomenon characterized by the appearance of small water drops that are discovered at dawn on plants, flowers and any outdoor surface, what happens then when a day of heat, and when the night temperature drops, the balance is broken between the gaseous state drips, and makes the floor give off the heatgenerating steam, condensing the humedadsobre cooled surfaces. It occurs in the serene nights and good weather, with temperature range.
Referred to as dew point which indicates which is the temperature at which air is saturated with water vapor, comprehensively.
Although in general, spray can give rise to beautiful and romantic landscapes, its usefulness is especially observed in desert areas since many times it is their only source of moisture. Peoples of the North African, have made stone constructions to collect that water from dew, which for them is vital.
It is also, dew, employed to designate any drop very little, and as a woman's name, being the name of a Virgin, Nuestra Señora del Rocío, which was declared in 1653, as Patron Saint of Almonte, Huelva, Spain, place where was seen by a pastor, for the first time.
Another use is to refer to a sugary substance that segregab certain insects, such as aphids, fed from SAP on the flowers, which is picked up by avejas and wasps that make him a sort of dark honey, medicinal properties, known as honeydew.

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