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</o:shapelayout></xml><![endif]--></head><body lang=ES-CL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear Users and Colleagues,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Does anyone have good empirical experience playing with WRF ETA levels?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Can you get better performance of the model in surface winds using high density ETA levels at lower levels against using the ETA levels default option? (Leaving aside that you probably need a smaller time step)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I'm asking because in one case for my surprise using the ETA levels default option was the better option by far. But I tested this only for one specific case. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> Kind Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 align=left style='border-collapse:collapse;margin-left:-2.25pt'><tr style='height:11.3pt'><td width=552 colspan=2 valign=top style='width:414.25pt;padding:0in 5.4pt 0in 5.4pt;height:11.3pt'><p class=MsoNormal style='mso-element:frame;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><b><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:#0068B3'>Julio Castro M.</span></b><o:p></o:p></p><p class=MsoNormal style='mso-element:frame;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:#0068B3'>Ingeniero Civil, MSc., PhD.</span><span style='color:black'><o:p></o:p></span></p></td></tr><tr style='height:11.3pt'><td width=552 colspan=2 valign=top style='width:414.25pt;padding:0in 5.4pt 0in 5.4pt;height:11.3pt'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;line-height:11.3pt;mso-element:frame;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:#0068B3'>Jefe del Área de Modelación y Calidad del Aire</span><span style='font-size:8.0pt;color:black'><o:p></o:p></span></p></td></tr><tr style='height:69.95pt'><td width=213 style='width:159.55pt;padding:0in 5.4pt 0in 5.4pt;height:69.95pt'><p class=MsoNormal style='mso-element:frame;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><span style='font-family:"Verdana","sans-serif";color:#0068B3'><img width=202 height=75 id="Imagen_x0020_2" src="cid:image001.png@01D1CC66.BB6453E0" alt="cid:83969B68-5B60-49B4-AE8A-CFDE16B1D669"></span><o:p></o:p></p></td><td width=340 style='width:254.7pt;padding:0in 5.4pt 0in 5.4pt;height:69.95pt'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-element:frame;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly'><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#0068B3'>Padre Mariano 103, Of. 307<br>Providencia, Santiago<br>Fono: +56 2 27195 610<br>Fax: +56 2 22351 100<br></span><span style='font-size:12.0pt;color:#1F497D'><a href="http://www.gac.cl/" title="blocked::http://www.gac.cl/"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#0068B3'>www.gac.cl</span></a></span><span style='color:black'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>