<div class="eI0"> <div class="eI1">Modèle:</div> <div class="eI2"><h2><a href="http://www.metoffice.gov.uk" target="_blank">NAE</a>: Global weather forecast model from the "UK MetOffice, North Atlantic European Model"</h2></div> </div> <div class="eI0"> <div class="eI1">Mise à jour:</div> <div class="eI2">4 times per day, from 0:00, 05:00, 11:00 and 17:00 UTC</div> </div> <div class="eI0"> <div class="eI1">Greenwich Mean Time:</div> <div class="eI2">12:00 UTC = 13:00 CET</div> </div> <div class="eI0"> <div class="eI1">Résolution:</div> <div class="eI2">0.18° x 0.28°</div> </div> <div class="eI0"> <div class="eI1">Paramètre:</div> <div class="eI2">Cloud cover (low,middle,high,total)</div> </div> <div class="eI0"> <div class="eI1">Description:</div> <div class="eI2"> Clouds are vertically divided into three levels: low, middle, and high. Each level is defined by the range of levels at which each type of clouds typically appears.<br><br> <table border="0" cellpadding="2" cellspacing="2" style="width:100%"> <tbody><tr> <th>Level</th> <th>Polar Region</th> <th>Temperate Region</th> <th>Tropical Region</th> </tr> <tr align="center"> <th align="left">High Clouds</th> <td >10,000-25,000 ft<br>(3-8 km)</td> <td>16,500-40,000 ft<br>(5-13 km)</td> <td>20,000-60,000 ft<br>(6-18 km)</td> </tr> <tr align="center"> <th align="left">Middle Clouds</th> <td>6,500-13,000 ft<br>(2-4 km)</td> <td>6,500-23,000 ft<br>(2-7 km)</td> <td>6,500-25,000 ft<br>(2-8 km)</td> </tr> <tr class="even" align="center"> <th align="left">Low Clouds</th> <td>Surface-6,500 ft<br>(0-2 km)</td> <td>Surface-6,500 ft<br>(0-2 km)</td> <td>Surface-6,500 ft<br>(0-2 km)</td> </tr> </tbody></table> <br><br>The types of clouds are:<br><br> High clouds: Cirrus (Ci), Cirrocumulus (Cc), and Cirrostratus (Cs). They are typically thin and white in appearance, but can appear in a magnificent array of colors when the sun is low on the horizon.<br><br> Middle clouds: Altocumulus (Ac), Altostratus (As). They are composed primarily of water droplets, however, they can also be composed of ice crystals when temperatures are low enough.<br><br> Low clouds: Cumulus (Cu), Stratocumulus (Sc), Stratus (St), and Cumulonimbus (Cb) are low clouds composed of water droplets. <br> </div> </div> <div class="eI0"> <div class="eI1">NWP:</div> <div class="eI2">La prévision numérique du temps (PNT) est une application de la météorologie et de l'informatique. Elle repose sur le choix d'équations mathématiques offrant une proche approximation du comportement de l'atmosphère réelle. Ces équations sont ensuite résolues, à l'aide d'un ordinateur, pour obtenir une simulation accélérée des états futurs de l'atmosphère. Le logiciel mettant en œuvre cette simulation est appelé un modèle de prévision numérique du temps.<br><br> <br>Prévision numérique du temps. (2009, décembre 12). Wikipédia, l'encyclopédie libre. Page consultée le 20:48, février 9, 2010 à partir de <a href="http://fr.wikipedia.org/w/index.php?title=Pr%C3%A9vision_num%C3%A9rique_du_temps&oldid=47652746" target="_blank">http://fr.wikipedia.org/w/index.php?title=Pr%C3%A9vision_num%C3%A9rique_du_temps&oldid=47652746</a>.<br> </div></div> </div>