Education, development and resolution cloud formation is the process of cloud formation by condensa

Ingredients A cloud consists of aerosol, a collection of finely dispersed particles in the gas mixture of air (not water vapor, this is a gas and just as invisible as the rest of the air). It was only after cooling below a certain temperature the dew point, water vapor formed from the tiny water droplets at high altitude also tiny, floating ice crystals. The diameter of the liquid droplets is typically in the range of two to ten microns, but may also be much greater precisely in the rain clouds with up to two millimeters. Large drops and still much larger hailstones can only arise when strong updrafts counteract gravity.
Education, development and resolution cloud formation is the process of cloud formation by condensation or Resublimation of water vapor on condensation nuclei in the troposphere and stratosphere in some cases. With the change nolan smith duke of temperature (density) and humidity of an air mass clouds are formed, or solve them on. This can for example be done by raising processes in the atmosphere at passage of cold and warm fronts that carry air masses in higher layers and leave it there to cool, thermal updrafts or slope updrafts supply of colder air masses, supply of humid air masses. A visible cloud is produced when the conditions are met for the formation of stable water droplets or crystals. It is less important to the water absorption capacity of the air than on the ratio of condensation and evaporation. On the surface of the water droplet in a cloud, a steady exchange of water molecules between the ambient air and the droplets takes place: only if attach to the drop more water molecules leave this time, only assuming that the condensation rate is higher than the evaporation rate, a drop grow and thus lead to cloud formation. Whether it can happen, depends primarily on two variables:
Of the number of water molecules in the vicinity of the drop, the more water vapor molecules surrounding the droplets, the more likely it is that one sticks to the droplets. The number of water vapor molecules can express the so-called water vapor, which is the proportion of the total air pressure caused by the water vapor. From the temperature of the water droplet, the warmer the droplet is, the easier water molecules detach from the drops. The formation of a cloud is so favored by low temperatures and by a large number of water molecules or by high water vapor pressure, which is synonymous with a high relative humidity.
The temperature nolan smith duke at which the condensation and evaporation offset is referred to as dew point temperature. If this falls below form and grow under certain conditions stable droplets. This temperature depends on the water vapor pressure. The water vapor pressure, wherein the condensation nolan smith duke and evaporation are in balance nolan smith duke is called the saturation vapor pressure. It depends on the temperature and is also determined by curvature and solution effects. Cumulus cloud droplets to form in the atmosphere occurs only when a sufficient number of condensation nuclei is present. Such germs can for example be dust grains or large molecules, pollen or near the ocean, salt crystals nolan smith duke (see aerosol). Over the oceans is often formed during the decomposition of algae dimethyl sulfide nolan smith duke (DMS) is responsible for the formation of clouds. Even a large part of the cloud droplets in the liquid nolan smith duke state can be located also at temperatures below 0 C. As the temperature falls to about -12 C usually no ice crystals form out so that the cloud of supercooled water droplets called is. Similarly, solutes inside the droplet due cause by the freezing point depression lowering the condensation temperature. In a further lowering of the temperature of the ice content continues to grow, only to be present at about -40 C ice crystals. At higher altitudes, the cloud formation is therefore nolan smith duke characterized nolan smith duke by crystallization processes. Droplets fall because of their small size, about 1 to 15 microns or 0.001 to 0.015 mm, very slowly. Because their diameter is small, their Reynolds number is smaller than 0.1. Consequently, there is a laminar flow. The settling velocity grows according to the law of Stokes with the square of the diameter. A droplet having a diameter of 20/1000 mm decreases nolan smith duke of about 1 cm per second. The sinking speed can reach values of up to 15 cm / s. It is a purely aerodynamic value. To distinguish them is the fall velocity. It results from the difference in the speed of the up or downdraft and the rate of descent. Because the speed of so