morning,<br>I'm a student in level 5 and I attemp my research at laboratory of environmental modeling &amp; atmospheric physics in&nbsp; faculty of science of the university of yaounde 1-Cameroon, I use the RegCM3 model to perform the dynamics of west african monsson, I have the following problem: I want to compare the output data from the model with observed data (ERA 40), but The output DATA from the model have <span style="font-weight: bold;">sigma values as vertical coordinates </span>,while the observed data have <span style="font-weight: bold;">pressure values as vertical coordinates , </span>how do I do to compare both datas.<br>Thancks<br><BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;<span style="font-weight: bold;"> </span><font style="font-weight: bold;" size="2">&nbsp;&nbsp;&nbsp; </font><font size="2">DEA Student,</font><br style="font-weight: bold;"><font style="font-family: arial narrow; font-weight: bold;" size="3">Laboratory for Environmental Modeling
 &amp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Atmospheric Physics</font><br style="font-weight: bold;"><span style="font-weight: bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Faculty of Sciences - UY 1<br>P.O.BOX 812 Yaounde - CAMEROON<br><p>&#32;


      

      <hr size="1"> 
Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! 
Profitez des connaissances, des opinions et des expériences des internautes sur <a href="http://fr.rd.yahoo.com/evt=42054/*http://fr.answers.yahoo.com">Yahoo! Questions/Réponses</a>.