![]() ![]() Mixed clouds occur only when the cloud temperature is below 0 ☌ (32 ☏). Clouds consist entirely of water droplets, entirely of ice crystals, or of a mixture of water droplets and ice crystals, with crystals predominating in the colder, upper regions of the troposphere. These droplets, usually present in concentrations of a few hundred per cubic centimetre, constitute a nonprecipitating water cloud. This process rapidly gives rise to droplets on the order of 0.01 mm (0.0004 inch) in diameter. Condensation nuclei are composed of microscopic particles in the air. In expanding, the air cools adiabatically (i.e., without heat exchange with the surrounding air) until its temperature falls below the dew point, upon which the air becomes supersaturated such that water vapour condenses onto cloud condensation nuclei or tiny water droplets (or deposits onto ice nuclei or tiny ice crystals). As a mass of air ascends, the lower pressures prevailing at higher levels allow it to expand. Fog is a shallow layer of cloud at or near ground level.Ĭlouds are formed when relatively moist air rises. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!Ĭloud, any visible mass of water droplets, ice crystals, or a mixture of both that is suspended in the air, usually at a considerable height ( see video).Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.User options allow you to adjust the overall transparency of the cloud layer.ĮarthDesk uses the same database technology as Time Palette, providing the application with detailed geographical and time zone information for 10,000 cities throughout the world. ![]() With an internet connection, EarthDesk displays real-time global cloud cover, allowing users to track hurricanes and typhoons, or simply admire our beautiful planet. ![]() For Windows, the image can span across multiple screens. or you may choose to only display map images on certain monitors. Each Macintosh desktop is independently configurable so that different maps can be shown on different screens. EarthDesk automatically updates when waking from sleep and supports multiple displays.ĮarthDesk's wide variety of map projections gives you complete control over the maps on your desktop.ĮarthDesk can be installed on systems with multiple monitors. Welcome to EarthDesk.ĮarthDesk features real-time clouds (updated at 3-hour intervals) with transparency and moonlight reflection, accurate sun, moon and city lighting, and high quality twilight shading.Īmong EarthDesk's highlights are eleven map projections, a database of 10,000 cities for centering the map, as well as enhanced satellite, natural satellite and political maps. Now imagine having that view on your desktop. Imagine gazing through the window of an orbiting spaceship. ![]() With up to 4 maps, 11 projections and 10,000 cities, EarthDesk is truly a map-lover's dream. EarthDesk replaces your Macintosh desktop or Windows wallpaper with a stunning, real-time dynamic image of our planet continuously updating in the background while you work. EarthDesk 5 is the latest release of our award-winning dynamic desktop application. ![]()
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