<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><P>Hi Mikhail,</P>
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<P>From my experience simulating sea-land breeze with WRF over Israel over complex topography (but with versions 2 of WRF) I suggest that you use 2-way nesting WITH feedback. My experience is that if large scale flow is strong unless you use 2-way with feedback the large scale will erase the high resolution mesoscale effects very quickly, in particular land-breeze. Also, re-start the model often, the range of predictability is very short at 1 km resolution (the uptake of the dynamics by the lateral boundaries, i.e., the large scale). I re-start 4 times a day, and spin up is very short, ~3 hours. I have not noticed significant differences between PBL parameterizations as compared to the differences caused by the nesting strategy and lead time. </P>
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<P>I will be very interested to read about your new results if you try my advice.</P>
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<P>Dorita</P>
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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">----- Original Message ----<BR>From: Mikhail Titov <mikhail.titov@canterbury.ac.nz><BR>To: wrf-users@ucar.edu<BR>Cc: Mike Green <mike.green@canterbury.ac.nz><BR>Sent: Tuesday, September 30, 2008 3:32:17 AM<BR>Subject: [Wrf-users] WRF sea breeze<BR><BR>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Dear All,</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>I model diurnal-nocturnal cycle of see breeze for Australia (desert pattern) using WRF v3.0 with ETA levelling.</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>But in the modelled one year mean wind off-show night breeze is much better developed than on-shore day breeze. </FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>In fact WRF (4-grid run: 27-9-3-1 km with local topography) fails to reproduce on-shore day breeze to compare with observations.</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>My physical parameterisation is the next one:</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>=============================================</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2> &physics<BR> mp_physics = 6, 6, 6, 6,<BR> mp_zero_out = 2,<BR> ra_lw_physics = 1, 1, 1, 1,<BR> ra_sw_physics = 1, 1,
1, 1,<BR> radt = 27, 27, 27, 27,<BR> sf_sfclay_physics = 1, 1, 1, 1,<BR> sf_surface_physics = 2, 2, 2, 2,<BR> bl_pbl_physics = 1, 1,
1, 1,<BR> bldt = 0, 0, 0, 0,<BR> cu_physics = 1, 1, 0, 0,<BR> cudt = 3, 3, 3,
0,<BR> isfflx = 1,<BR> ifsnow = 0,<BR> icloud = 1,<BR> surface_input_source = 1,<BR> num_soil_layers =
4,<BR> ucmcall = 0,<BR> mp_zero_out = 0,<BR> maxiens = 1,</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2> maxens2 = 3,<BR> maxens3 = 16,<BR> ensdim = 144,<BR> slope_rad =
0,<BR> topo_shading = 0,<BR> omlcall = 1,<BR> oml_hml0 = 50.,<BR> oml_gamma = 0.13,<BR>===========================================</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>I use physical parameterization applied to desert places of Africa and Arabia (WRF workshop, Boulder, June 2008). </FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Also I use two-way nesting (feedback = 0).</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Any suggestions about what kind of physical parameterization is better to reproduce see breeze in WRF is highly appreciable.</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Any experience how is better to model see breeze using WRF will be very useful. </FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Many thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2>Michael</FONT></SPAN></DIV>
<DIV><SPAN class=475480600-30092008><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=475480600-30092008></SPAN><SPAN class=475480600-30092008>
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<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt" align=left><SPAN lang=EN-AU><FONT size=2><FONT face="Courier New"><STRONG>--------------------------------------</STRONG></FONT></FONT></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-AU><FONT size=2><FONT face="Courier New"><STRONG>Dr. Mikhail Titov </STRONG></FONT></FONT></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-AU><FONT face="Courier New" size=2><STRONG></STRONG></FONT></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-AU><FONT size=2><FONT face="Courier New"><STRONG>Connell Wagner Ltd.</STRONG></FONT></FONT></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-AU><STRONG><FONT face="Courier New" size=2>VP of the NZ Met.Society</FONT></STRONG></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New"><STRONG><SPAN lang=EN-AU>University<SPAN lang=EN-AU> of Canterbury</SPAN></SPAN><SPAN lang=EN-AU></SPAN></STRONG></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New"><STRONG><SPAN lang=EN-AU>Christchurch<SPAN lang=EN-AU>, New Zealand</SPAN></SPAN></STRONG></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New"><STRONG><SPAN lang=EN-AU>E-mail: <A href="mailto:Mikhail.Titov@canterbury.ac.nz" target=_blank rel=nofollow ymailto="mailto:Mikhail.Titov@canterbury.ac.nz">Mikhail.Titov@canterbury.ac.nz</A></SPAN></STRONG></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-AU><FONT size=2><FONT face="Courier New"><STRONG>--------------------------------------</STRONG></FONT></FONT></SPAN></P></DIV></DIV>
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