An aggregate of cloud droplets forms a visible cloud. Liquid or solid particles, such as those in smoke or dust, that provide a surface upon which water vapour can condense into cloud droplets or form ice crystals. Plotted elements may include the of height above sea level of the particular pressure, wind, temperature, and humidity or dew point temperature. In meteorology, convection generally refers to such transport and mixing in the vertical direction, and advection refers to processes in the horizontal plane. Clouds formed atop rising air columns.
Cumulus clouds are convective clouds.
The flow of the wind resulting in a horizontal inflow of air into a region. Convergence of winds near the surface are associated with upward motion known in meteorology as convection . The opposite of convergence is divergence . The currently accepted name of the twenty-four hour time scale used throughout the scientific and military communities to coordinate and standardize time using an atomic clock rather than solar observations. A principal cloud type of vertical elements having a flat base and dense, bulging upper portion resembling a heap or pile.