fog density
31hydrologic sciences — Introduction the fields of study concerned with the waters of the Earth. Included are the sciences of hydrology, oceanography, limnology, and glaciology. In its widest sense hydrology encompasses the study of the occurrence, the… …
32Oakland, California — Oakland redirects here. For other uses, see Oakland (disambiguation). Oakland   City   City of Oakland …
33Directed-energy weapon — This article is about practical experiments with energy weapons. For fictional uses, see raygun. Humvee with Active Denial System mounted A directed energy weapon (DEW) emits energy in an aimed direction without the means of a projectile. It… …
34Convection — This figure shows a calculation for thermal convection in the Earth s mantle. Colors closer to red are hot areas and colors closer to blue are cold areas. A hot, less dense lower boundary layer sends plumes of hot material upwards, and likewise,… …
35Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …
36Coast Range (EPA ecoregion) — This article is about the ecoregion designated by the EPA. For the mountains in California, see California Coast Ranges. For the mountains in Oregon, see Oregon Coast Range. For the mountains in Washington, see Olympic Mountains. Level III… …
37Numerical weather prediction — Weather models use systems of differential equations based on the laws of …
38Weather front — A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena. In surface weather analyses, fronts are depicted using various colored lines and symbols, depending on the… …
39Smoke screen — For the Transformers character, see Smokescreen (Transformers) A smoke screen is a release of smoke in order to mask the movement or location of military units such as infantry, tanks, aircraft or ships.It is most commonly deployed in a canister …
40Airport — For other uses, see Airport (disambiguation). Pulkovo Airport in Saint Petersburg, Russia (2005) …
