<div class="eI0"> <div class="eI1">жЁЎејЏ:</div> <div class="eI2"><h2>NAM: North American Mesoscale Forecast System "<a href="http://www.emc.ncep.noaa.gov/NAM/" target="_blank">NOAA</a>"</h2></div> </div> <div class="eI0"> <div class="eI1">更新:</div> <div class="eI2">4 times per day, from 0:00, 06:00, 12:00 and 18:00 UTC</div> </div> <div class="eI0"> <div class="eI1">ж јжћ—е°јжІ»е№іж—¶:</div> <div class="eI2">12:00 UTC = 20:00 еЊ—дє¬ж—¶й—ґ</div> </div> <div class="eI0"> <div class="eI1">Resolution:</div> <div class="eI2">32km</div> </div> <div class="eI0"> <div class="eI1">еЏ‚й‡Џ:</div> <div class="eI2"><font face="е¤№еЏ‘з °" size="2"> RH 600-3000:<br>地面以上600е€°3000米之间的平均相对湿度 </div> </div> <div class="eI0"> <div class="eI1">жЏЏиї°:</div> <div class="eI2"> иї™е№…е›ѕжѕз¤єењ°йќўд»ҐдёЉ600е€°3000米之间大气层的平均相对湿度。 虽然这幅图不如925ж€–700з™ѕеё•з‰еЋ‹йќўз›ёеЇ№ж№їеє¦е›ѕй‚Јж ·й‡Ќи¦Ѓ пјЊдЅ†жЇе®ѓиѓЅеЏЌж 600з±іе€°3000米之间云的形成。 <br><br> </div> </div> <div class="eI0"> <div class="eI1">NWP:</div> <div class="eI2">Numerical weather prediction uses current weather conditions as input into mathematical models of the atmosphere to predict the weather. Although the first efforts to accomplish this were done in the 1920s, it wasn't until the advent of the computer and computer simulation that it was feasible to do in real-time. Manipulating the huge datasets and performing the complex calculations necessary to do this on a resolution fine enough to make the results useful requires the use of some of the most powerful supercomputers in the world. A number of forecast models, both global and regional in scale, are run to help create forecasts for nations worldwide. Use of model ensemble forecasts helps to define the forecast uncertainty and extend weather forecasting farther into the future than would otherwise be possible.<br> <br>Wikipedia, Numerical weather prediction, <a href="http://zh.wikipedia.org/wiki/ж•ёеЂје¤©ж°Јй ђе ±" target="_blank">http://zh.wikipedia.org/wiki/ж•ёеЂје¤©ж°Јй ђе ±</a>(as of Feb. 9, 2010, 20:50 UTC).<br> </div></div> </div>