※ 引述《zonslan (呼...)》之銘言：
: http://152.80.49.205/PUBLIC/
: FNMOC的數值預報網站
: 其中最主要的NOGAPS(NGP)模式已在今年9月作出程式更新
: 提升其縱向和橫向解析度(我應該沒有會錯意^^ 原文在下)
提高了模式能解析的最大波數(T) 與垂直層數(L 即高度的解析度)
大氣模式通常是用波譜方法進行運算的
而能解析的波數越高(即波長越小)代表水平解析度越高
: Effective 18 Sept 2002, FNMOC commenced operation of NOGAPS at a higher
: resolution. The model resolution increased from T159L24 to T239L30, where T
: represents the number of spectral waves the model can resolve and L represents
: the number of vertical levels. Successful parallel-ops testing took place
: during July and August 2002. Testing confirmed the new model resolution provides
: a positive impact on the prediction of low level winds, precipitation, and
: tropical cyclone tracks in the tropics and some positive impact in the
: mid-latitudes. Check the FNMOC homepage at Notice Regarding NOGAPS Model
: Improvement for more detailed information on the testing results.
: This implementation marks the first step in a phased approach to upgrading our
: numerical weather prediction (NWP) capability.
: 此外FNMOC的另兩個全球數值預報模式的AVN和MRF則更新結合成為GFS Model
: 並且已在最近幾日在網站上顯示GFS的數值結果
: 但從11/20起 GFS將一日跑四次數值
: 並且將預報時間延長到384小時(相當於16天)!!!!
: 如此一來以後的"雙週天氣預報"將可能實現!!!!
: 原文如下:
: On 24 April 2002 at 00Z the NCEP MRF and AVN forecast outputs were combined and
: renamed the Global Forecasting System (GFS). The GFS is run four times per day
: and extends to the 384 hour forecast (16 days).
: FNMOC receives this data at 1 degree grid resolution for the 0-180 hour
: forecast and 2.5 degree resolution from 180-364 hours. FNMOC will make changes
: to reflect the new model name NCEP_GFS on 11/20/02. For more information about
: changes to the GFS model, visit the following website:
: http://www.emc.ncep.noaa.gov/forecasts/
: (誰可以解釋一下什麼1 degree grid和2.5是什麼意思?)
grid resolution 指的是網格解析度
1 or 2.5 degree 指的是每個網格的大小為經(緯)度 1 or 2.5 度
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