<div class="eI0">
  <div class="eI1">Modelo:</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">Actualiza&ccedil;&atilde;o:</div>
  <div class="eI2">2 times per day, from 00:00 and 12:00 UTC</div>
 </div>
 <div class="eI0">
  <div class="eI1">Greenwich Mean Time:</div>
  <div class="eI2">12:00 UTC = 13:00 WEST</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">par&acirc;metro:</div>
  <div class="eI2">Significant wave heights</div>
 </div>
 <div class="eI0">
  <div class="eI1">Descri&ccedil;&atilde;o:</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">A previs&atilde;o num&eacute;rica do tempo usa o estado instant&acirc;neo da atmosfera como dados de entrada para modelos matem&aacute;ticos da atmosfera, com vista &agrave; previs&atilde;o do estado do tempo.<br>
Apesar dos primeiros esforços para conseguir prever o tempo tivessem sido dados na d&eacute;cada de 1920, foi apenas com o advento da era dos computadores que foi possível realiz&aacute;-lo em tempo real. A manipulaç&atilde;o de grandes conjuntos de dados e a realizaç&atilde;o de c&aacute;lculos complexos para o conseguir com uma resoluç&atilde;o suficientemente elevada para produzir resultados úteis requer o uso dos supercomputadores mais potentes do mundo. Um conjunto de modelos de previs&atilde;o, quer &agrave; escala global quer &agrave; escala regional, s&atilde;o executados para criar previsões do tempo nacionais. O uso de previsões com modelos semelhantes ("model ensembles") ajuda a definir a incerteza da previs&atilde;o e estender a previs&atilde;o do tempo bastante mais no futuro, o que n&atilde;o seria possível conseguir de outro modo.<br>
<br>Contribuidores da Wikip&eacute;dia, "Previs&atilde;o num&eacute;rica do tempo," Wikip&eacute;dia, a enciclop&eacute;dia livre, <a href="http://pt.wikipedia.org/w/index.php?title=Previs%C3%A3o_num%C3%A9rica_do_tempo&amp;oldid=17351675" target="_blank">http://pt.wikipedia.org/w/index.php?title=Previs%C3%A3o_num%C3%A9rica_do_tempo&oldid=17351675</a> (accessed fevereiro 9, 2010). <br>
</div></div>
</div>