<div class="eI0">
  <div class="eI1">模式:</div>
  <div class="eI2"><h2><a href="http://polar.ncep.noaa.gov/" target="_blank">WAVEWATCH III</a> Environmental Modeling Center</h2></div>
 </div>
 <div class="eI0">
  <div class="eI1">æ›´æ–°:</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">格林尼治平时:</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">0.2&deg; x 0.2&deg; for Mediterranean<br>1&deg; x 1&deg; for Rest of World</div>
 </div>
 <div class="eI0">
  <div class="eI1">参量:</div>
  <div class="eI2">Significant wave heights</div>
 </div>
 <div class="eI0">
  <div class="eI1">描述:</div>
  <div class="eI2">

The significant wave height is a commonly used statistical measure for the
wave height, and closely corresponds to what a trained observer would
consider to be the mean wave height. Note that the highest wave height of an
individual wave will be significantly larger. The peak period is not
commonly presented. The wave field generally consists of a set of individual
wave fields. The peak period identifies either the locally generated "wind
sea" (in cases with strong local winds) or the dominant wave system
("swell") that is generated elsewhere. Note that the peak period field shows
discontinuities. These discontinuities can loosely be interpreted as swell
fronts, although in reality many swell systems overlap at most locations and
times (see spectra below).

    
  </div>
 </div>
  <div class="eI0">
   <div class="eI1">NWW3:</div>
   <div class="eI2">
 The NOAA WAVEWATCH IIIâ„¢ operational wave model suite consists of a set of
 five wave models, based on version 2.22 of WAVEWATCH IIIâ„¢. All models use
 the default settings of WAVEWATCH IIIâ„¢ unless specified differently.
 
 <ol>
     <li> The global NWW3 model </li>
     <li> The regional Alaskan Waters (AKW) model </li>
     <li> The regional Western North Atlantic (WNA) model </li>
     <li> The regional North Atlantic Hurricane (NAH) model </li>
     <li> The regional Eastern North Pacific (ENP) model </li>
     <li> The regional North Pacific Hurricane (NPH) model </li>
 </ol>
 
 All regional models obtain hourly boundary data from the global model. All
 models are run on the 00z, 06z, 12z and 18z model cycles, and start with a
 6h hindcast to assure continuity of swell. All models provides 126 hour
 forecasts, with the exception of the NAH model (72 hour forecast). No wave
 data assimilation is performed. All models are based on shallow water
 physics without mean currents. Additional model information is provided in
 the table and bullets below. The four time steps are the global step,
 propagation step for longest wave, refraction step and minimum source term
 step. 
 </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/數值天氣預報" target="_blank">http://zh.wikipedia.org/wiki/數值天氣預報</a>(as of Feb. 9, 2010, 20:50 UTC).<br>
</div></div>
</div>