Water vapor normally begins to condense on condensation nuclei such as dust, ice, and salt in order to form clouds. Some examples of ways that water vapor is added to the air are by wind convergence into areas of upward motion precipitation or virga falling from above daytime heating evaporating water from the surface of oceans, water bodies, or wet land transpiration from plants cool or dry air moving over warmer water and lifting air over mountains. įog begins to form when water vapor condenses into tiny water droplets that are suspended in the air. Those outside the camera lens's depth of field appear as orbs.įog forms when the difference between air temperature and dew point is less than 2.5 ☌ (4.5 ☏). A close-up view of water droplets forming fog.
