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<TITLE>Re: [Wrf-users] WRF sea breeze</TITLE>
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<FONT FACE="Arial"><SPAN STYLE='font-size:11pt'>Patrick, and all sea breeze modelers,<BR>
<BR>
We here in Florida have a strong desire and some experience trying to get the sea breeze right. For over half the year we are in a weak synoptic regime where jet stream dynamics play virtually no part in our daily weather<BR>
(OK, so we do occasionally get a front even in the summer) but the seabreeze convection brings diurnal thunderstorm somewhere in the state.<BR>
<BR>
Here are some good references:<BR>
Pete Bogenschutz M. S. Thesis<BR>
<a href="http://etd.lib.fsu.edu/theses/available/etd-11122004-131729/">http://etd.lib.fsu.edu/theses/available/etd-11122004-131729/</a><BR>
<BR>
<a href="http://www.srh.noaa.gov/jax/research/Welsh_NWP50_WFO_WRFfinal.pdf">http://www.srh.noaa.gov/jax/research/Welsh_NWP50_WFO_WRFfinal.pdf</a><BR>
<BR>
Southeast WRF verification<BR>
<a href="http://www.dtcenter.org/visitor_program/visitors.05_06/reports/pbogen_DTCreunion.pdf">http://www.dtcenter.org/visitor_program/visitors.05_06/reports/pbogen_DTCreunion.pdf</a><BR>
<BR>
Etherton and Santos 2008<BR>
<a href="http://ams.allenpress.com/perlserv/?request=get-abstract&doi=10.1175%2F2007WAF2006115.1&ct=1">http://ams.allenpress.com/perlserv/?request=get-abstract&doi=10.1175%2F2007WAF2006115.1&ct=1</a><BR>
<BR>
<BR>
Regards,<BR>
<BR>
<BR>
Pat Welsh<BR>
University of North Florida<BR>
<BR>
On 9/30/08 5:35 AM, "<a href="preuter@labri.fr">preuter@labri.fr</a>" <<a href="preuter@labri.fr">preuter@labri.fr</a>> wrote:<BR>
<BR>
<FONT COLOR="#0000FF">> Dear Dorita and Mikhail,<BR>
> <BR>
> I am also studying the sea breeze effects with WRF V2.2, and had <BR>
> feedback for several months. I am also using "feedback = 1" in the <BR>
> namelist, and I had pretty incredibly precise results compared to what <BR>
> happened in the real-world!<BR>
> <BR>
> Being very interested in this topic, I would like to hear other <BR>
> advices also, such as experiences about the physics to use, and the <BR>
> comparison of ARW and NMM!<BR>
> <BR>
> Have a nice day<BR>
> <BR>
> Patrick<BR>
> <BR>
> <BR>
> <BR>
> "Dorita Rostkier-Edelstein" <<a href="drostkier@yahoo.com">drostkier@yahoo.com</a>> a écrit :<BR>
> <BR>
</FONT><FONT COLOR="#008000">>> Hi Mikhail,<BR>
>> <BR>
>> From my experience simulating sea-land breeze with WRF over Israel <BR>
>> over complex topography (but with versions 2 of WRF) I suggest that <BR>
>> you use 2-way nesting WITH feedback. My experience is that if large <BR>
>> scale flow is strong unless you use 2-way with feedback the large <BR>
>> scale will erase the high resolution mesoscale effects very quickly, <BR>
>> in particular land-breeze. Also, re-start the model often, the range <BR>
>> of predictability is very short at 1 km resolution (the uptake of <BR>
>> the dynamics by the lateral boundaries, i.e., the large scale). I <BR>
>> re-start 4 times a day, and spin up is very short, ~3 hours. I have <BR>
>> not noticed significant differences between PBL parameterizations as <BR>
>> compared to the differences caused by the nesting strategy and lead <BR>
>> time.<BR>
>> <BR>
>> I will be very interested to read about your new results if you try <BR>
>> my advice.<BR>
>> <BR>
>> Dorita<BR>
>> <BR>
>> <BR>
>> <BR>
>> <BR>
>> ----- Original Message ----<BR>
>> From: Mikhail Titov <<a href="mikhail.titov@canterbury.ac.nz">mikhail.titov@canterbury.ac.nz</a>><BR>
>> To: <a href="wrf-users@ucar.edu">wrf-users@ucar.edu</a><BR>
>> Cc: Mike Green <<a href="mike.green@canterbury.ac.nz">mike.green@canterbury.ac.nz</a>><BR>
>> Sent: Tuesday, September 30, 2008 3:32:17 AM<BR>
>> Subject: [Wrf-users] WRF sea breeze<BR>
>> <BR>
>> <BR>
>> Dear All,<BR>
>> <BR>
>> I model diurnal-nocturnal cycle of see breeze for Australia (desert <BR>
>> pattern) using WRF v3.0 with ETA levelling.<BR>
>> But in the modelled one year mean wind off-show night breeze is <BR>
>> much better developed than on-shore day breeze.<BR>
>> In fact WRF (4-grid run: 27-9-3-1 km with local topography) fails to <BR>
>> reproduce on-shore day breeze to compare with observations.<BR>
>> <BR>
>> My physical parameterisation is the next one:<BR>
>> =============================================<BR>
>> &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,<BR>
>> 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>
>> ===========================================<BR>
>> <BR>
>> I use physical parameterization applied to desert places of Africa <BR>
>> and Arabia (WRF workshop, Boulder, June 2008). <BR>
>> Also I use two-way nesting (feedback = 0).<BR>
>> <BR>
>> Any suggestions about what kind of physical parameterization is <BR>
>> better to reproduce see breeze in WRF is highly appreciable.<BR>
>> Any experience how is better to model see breeze using WRF will be <BR>
>> very useful. <BR>
>> <BR>
>> Many thanks,<BR>
>> Michael<BR>
>> <BR>
>> --------------------------------------<BR>
>> Dr. Mikhail Titov<BR>
>> Connell Wagner Ltd.<BR>
>> VP of the NZ Met.Society<BR>
>> Universityof Canterbury<BR>
>> Christchurch, New Zealand<BR>
>> E-mail: <a href="Mikhail.Titov@canterbury.ac.nz">Mikhail.Titov@canterbury.ac.nz</a><BR>
>> --------------------------------------<BR>
</FONT><FONT COLOR="#0000FF">> <BR>
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