模式:

557WW: "557th Weather Wing Ensemble" The US Air Force’s 557th Weather Wing creates the Global Ensemble Prediction Suite (GEPS) twice per day by ingesting 63 global forecast model runs produced by three operational numerical modeling centers and creating tailored statistical ensemble forecasts. Products include probabilities for precipitation and snowfall, and means/standard deviations of temperature, wind, pressure, height, and relative humidity. 240 hours of one-degree gridded forecast output is produced at 6 hour intervals on the 00Z and 12Z cycle.

更新:

2 times per day, from 06:00 and 18:00 UTC

格林尼治平时:

12:00 UTC = 20:00 北京时间

Resolution:

1° x 1°

参量:

850百帕风:
850百帕等压面上的风

描述:

这幅图显示每个模式格点(模式格距约为80公里)850百帕等压面上模式计算的平均风矢量。 850百帕等压面高度在1500米左右。人们可以从850百帕位势高度和温度图上读出其当前高度。这幅图对那些在1500米以下飞行的滑翔运动爱好者和热气球驾驶员十分有用。 (风计算器)

NWP:

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.

Wikipedia, Numerical weather prediction, http://zh.wikipedia.org/wiki/數值天氣預報(as of Feb. 9, 2010, 20:50 UTC).