<div class="eI0"> <div class="eI1">模å¼:</div> <div class="eI2"><h2><a href="http://www.jma.go.jp/jma/indexe.html" target="_blank">JMA</a>: Global weather forecast model from the "Japan Meteorological Agency"</h2></div> </div> <div class="eI0"> <div class="eI1">æ›´æ–°:</div> <div class="eI2">2 times per day, from 10:00 and 23:00 UTC</div> </div> <div class="eI0"> <div class="eI1">æ ¼æž—å°¼æ²»å¹³æ—¶:</div> <div class="eI2">12:00 UTC = 20:00 北京时间</div> </div> <div class="eI0"> <div class="eI1">Resolution:</div> <div class="eI2">2.5° x 2.5°</div> </div> <div class="eI0"> <div class="eI1">å‚é‡:</div> <div class="eI2"><font face="夹å‘ç °" size="2"> 抬å‡æŒ‡æ•° </div> </div> <div class="eI0"> <div class="eI1">æè¿°:</div> <div class="eI2"> 抬å‡æŒ‡æ•°(LI)是一ç§è¡¨ç¤ºè‡ªç”±å¯¹æµé«˜åº¦ä»¥ä¸Šä¸ç¨³å®šèƒ½é‡å¤§å°çš„æŒ‡æ•°ã€‚å®ƒè¡¨ç¤ºä¸€ä¸ªæ°”å— ä»ŽæŠ¬å‡å‡ç»“高度出å‘,沿湿ç»çƒçº¿ä¸Šå‡åˆ°500百帕(æµ·æ‹”5500米左å³é«˜åº¦)处所具有的 温度被该处实际大气温度所å‡å¾—到的差值。比如,æŸä¸€æ°”å—沿湿ç»çƒçº¿ä¸Šå‡åˆ°500百帕 时的ç†è®ºå€¼ä¸ºï¼14°C, 而该处的实际温度为ï¼18°C, 那么抬å‡æŒ‡æ•°å°±æ˜¯-4。 当差值为负数时,表明气å—æ¯”å…¶çŽ¯å¢ƒæ¸©åº¦æ›´æš–ï¼Œå› æ¤å°†ä¼šç»§ç»ä¸Šå‡ã€‚该差值的ç»å¯¹å€¼ 越大,出现对æµå¤©æ°”çš„å¯èƒ½æ€§ä¹Ÿè¶Šå¤§ã€‚差值为æ£æ•°æ—¶ï¼Œè¡¨ç¤ºå¤§æ°”层结稳定。<br><br> 值得注æ„的是,ä¸å›½æ°”象å¦å®¶å®šä¹‰çš„抬å‡æŒ‡æ•°å’Œä¸Šé¢çš„定义æ£å¥½ç›¸åï¼Œä»–ä»¬ç”¨ä¸€ä¸ªæ°”å— æ²¿æ¹¿ç»çƒçº¿ä¸Šå‡åˆ°500百帕处所具有的温度å‡åŽ»è¯¥å¤„å®žé™…å¤§æ°”æ¸©åº¦å¾—åˆ°çš„å·®å€¼å®šä¹‰æŠ¬å‡ æŒ‡æ•°(大气科å¦è¾žå…¸ï¼ŒP603)ã€‚å› æ¤èŽ·å¾—的抬å‡æŒ‡æ•°å€¼å’Œæˆ‘们æ¤å¤„的抬å‡æŒ‡æ•°å€¼ç¬¦å·æ£å¥½ 相å。<br><br> <table border=1> <div class="eI0"> <td>抬å‡æŒ‡æ•°</td> <td>天气现象</td> </div> <div class="eI0"> <td> >0</td> <td>ä¸å¯èƒ½å‡ºçŽ°é›·é›¨å¤©æ°”</td> </div> <div class="eI0"> <td>0ï¼ -3</td> <td>å¯èƒ½å‡ºçŽ°é›·é›¨å¤©æ°”</td> </div> <div class="eI0"> <td>-3 - -5</td> <td>很å¯èƒ½å‡ºçŽ°é›·é›¨å¤©æ°”</td> </div> <div class="eI0"> <td>-5 - -7</td> <td>强对æµ(雷雨)天气</td> </div> <div class="eI0"> <td> <-7</td> <td>大气æžç«¯ä¸ç¨³å®šï¼Œå¼ºå¯¹æµå¤©æ°”</td> </div> </table> </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/數值天氣é å ±" target="_blank">http://zh.wikipedia.org/wiki/數值天氣é å ±</a>(as of Feb. 9, 2010, 20:50 UTC).<br> </div></div> </div>