evaporation in the atmosphere?

Question

please explain the process of evaporation in the atmosphere..
and another one what is advection and give me an example..

Answer 1

Evaporation

Evaporation of water from the Earth's surface forms one part of the water cycle. At 100ºC, the boiling point, all water will rapidly be turned to vapour, for the energy supplied to the water is enough to break all the molecular bonds in water apart. At temperatures between 100ºC and 0ºC, only some of the molecules in the water have enough energy to escape to the atmosphere and the rate at which water is converted to vapour is much slower.

The rate of evaporation will depend upon a number of factors. Rates increase when temperatures are higher; an increase of 10ºC will approximately double the rate of evaporation. The humidity of the surrounding air will also influence evaporation. Drier air has a greater "thirst" for water vapour than humid, moist air. It follows, therefore, that the presence of wind will also increase evaporation. On still days, water evaporating to the air remains close to its source, increasing the local humidity. As the moisture content of the air increases, evaporation will diminish. If, however, a steady flow of air exists to remove the newly formed vapour, the air surrounding the water source will remain dry, "thirsty" for future water.

Answer 2

I think evaporation occurs when there is a sufficient difference in temperature of water and its surroundings.

Evaporation is a process in which something is changed from a liquid to a vapor without its temperature reaching the boiling point.


The evaporation of water is greater near the surface of the earth. In the atmosphere, it also happens especially when there is lightning, water droplets or ice flakes may vaporize due to the heat introduced by it (lightning)

A change of the strength of Magnetic Field (energy) may also correspond to a change in temperature of the moving water molecules thereby there is heating in the atmosphere which may cause evaporation.

Advection is a related word to CONVECTION- a type of heat transfer where there is actual motion of hot or cold bodies. This is classified into two: natural and forced convection.

From Microsoft Encarta dictionary
Advection means the horizontal transfer of heat by air:
the horizontal transfer of a property such as heat, caused by air movement.