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<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009>Hello,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>In trying to use
ndown to do a one way nested run I encounter what appears to be artifacts in the
HGT field. I have attached three image files (screenshots from ncview) which
illustrate this. To help you orient the images, the nest is at the eastern end
of the central mountain range which is visible in the screenshot of the parent
domain. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>wrfinput_d01.pdf is
the output of real.exe for the parent domain (this is Tasmania by the
way)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>wrfndi_d02.pdf is
the output of real.exe for the nest</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>wrfinput_d02.pdf is
the output of ndown.exe</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>Note the artifacts
on the boundary of wrfinput_d02, most noticeable on the north and east
boundaries. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>I understand that
WRF does some blending of the terrain at the boundaries of the nests. However it
is clear from the parent terrain that this is not simply blending.
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>I have also attached
my namelists in case anyone would like to attempt to reproduce this problem.
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>Can anyone shed some
light on this? </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=676591002-12062009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=676591002-12062009>Chris
</SPAN></FONT></DIV>
<DIV> </DIV>
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