[RegCNET] [RegCNET-SASIA] HELP ON RegCM3

moetasim moetasim at gcisc.org.pk
Wed Aug 3 12:06:20 CEST 2005 

Hi adnan,

I have put a great effort in decoding your email and then finding out what 
do you have as a question.
Anyway, what I could understand is that you are facing CFL violation error 
while using Emanuel convection scheme and also you are unhappy due to slow 
simulation speed.
For slow simulation speed: you may compromise on domain size and resolution 
keeping in view your computational facilities. Large domains and high 
resolution simulations require reasonably fast computers!
And for CFL violation: you may adjust your alphae=0.01 or any low value in 
regcm.in until you get rid of this CFL error. 
Jeremy: Why are we not removing this CFL check from the main code?

MOet
 



> <DIV> 
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify"> Hello to all</P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">hope all of RegCM users  are
> fine and ok<?xml:namespace prefix = o ns =
> "urn:schemas-microsoft-com:office:office"
> /><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">I am a new user of RegCM3
> developed at your group. I have successfully run it
> for the simulations of one complete year and have also
> done post processing and CRU data comparison. I
>  have run the model with fallowing configurations
> using <B>E<?XML:NAMESPACE PREFIX = ST1
> /><ST1:STOCKTICKER>MANU</ST1:STOCKTICKER>EL Convective
> Precipitation Scheme.   
> <O:P></O:P></B><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Grid Points:<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN># of grid points along Y- axis
>     : 100<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN># of grid points along X- axis
>     : 100    
> <o:p></o:p></P><O:P></O:P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN># of vertical
> 
levels           &nbsp
;      
>    : 18<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN><B>  Resolution
> 
            &nbsp
;            &nbs
p;            
>  : 60Km<O:P></O:P></B> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Central Latitude of
> domain   
> 
            &nbsp
;  
>  : 330 N<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Central longitude of domain 
> 
            &nbsp
;   
>  : 770 E<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Pressure of model top
> (cb)         : 05
> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l2 level1 lfo7; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN><B>Resolution of the global 
> 
            &nbsp
;     
>  : 10 min<O:P></O:P></B> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt
> 0.75in; TEXT-ALIGN:
> justify"><B>      
> terrain and land use data 
> </B><o:p></o:p></P><O:P></O:P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l1 level1 lfo8; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN><ST1:PERSONNAME><?XML:NAMESPACE PREFIX =
> ST2 /><ST2:GIVENNAME>Reanalysis</ST2:GIVENNAME>
> <ST2:SN>Dataset</ST2:SN></ST1:PERSONNAME> for Initial
> &  : NNRP-2 <O:P></O:P><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN:
> justify">           
>  boundary Conditions<O:P></O:P><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Sea Surface Temperature
> type    
>        :
> GISST<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Starting date of Simulation
> 
            &nbsp
;      
> : <ST1:DATE month="1" day="1" year="1998">1st Jan.
> 1998</ST1:DATE><O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Ending  date of Simulation 
> 
            &nbsp
;     
> : <ST1:DATE month="12" day="31" year="1998">31st Dec.
> 1998</ST1:DATE><O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Time step for Atmosphere model
>       : 100
> Sec.<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Time step for Radiation 
> model   
>      : 30 min.
> <O:P></O:P><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Time step for LW
> absorption     
>        : 18
> hrs.<O:P></O:P> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt 1in;
> TEXT-ALIGN: justify; TEXT-INDENT: -0.25in; mso-list:
> l3 level1 lfo9; tab-stops: list .5in"><SPAN
> style="FONT-FAMILY: Symbol; FONT-SIZE: 10pt;
> mso-bidi-font-size: 12.0pt">·<SPAN style="FONT: 7pt
> 'Times New
> Roman'">        
> </SPAN></SPAN>Time step for BASTSIE model 
>        : 300 Sec
> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify"><O:P> </O:P><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">Now I am trying to run the
> simulations with <B>30km horizontal (ds)
> resolution</B> <B>and 
>       05 min</B>
> resolution of global terrain and land use data. During
> that simulation I am facing <B><SPAN style="COLOR:
> red; FONT-SIZE:
> 14pt">problems<O:P></O:P></SPAN></B><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt
> 1.25in; TEXT-ALIGN: justify; TEXT-INDENT:
> -0.25in">1)<SPAN style="FONT-SIZE: 7pt"><SPAN
> style="font-size-adjust: none; font-stretch:
> normal">     
> </SPAN></SPAN>Simulations is very slow ( one week's
> simulations per day) <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt
> 1.25in; TEXT-ALIGN: justify; TEXT-INDENT:
> -0.25in"><B>2)</B><B><SPAN style="FONT-SIZE:
> 7pt"><SPAN style="font-size-adjust: none;
> font-stretch: normal">     
> </SPAN></SPAN></B>It gives the following
> 
massage           &nbs
p;            &nb
sp;            &n
bsp;            &
nbsp;            
            
> <B><SPAN style="COLOR: red">"</SPAN> <SPAN
> style="COLOR: red">EMAN
> 
<ST1:PERSONNAME><ST2:GIVENNAME><ST1:STOCKTICKER>CLF</ST1:STOCKTICKER></ST2:GI
VENNAME>
> 
<ST2:SN>VOILATION</ST2:SN></ST1:PERSONNAME>:     &nb
sp;
> 121     100  
> 0.217548"    
> 
</SPAN>           &nbs
p;            &nb
sp;          
> </B>the number 121 and 100 ch anges and are generated
> randomly between 100 and 129
> .<o:p></o:p></P><O:P></O:P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">  Please guide me to
> overcome this problem. I will be very thankful to
> you<o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">  
>         
> <o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify"><O:P> </O:P><o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN:
> justify"><B><ST1:PERSONNAME><ST2:GIVENNAME>ADNAN</ST2:GIVENNAME>
> <ST2:SN>SAFDAR<O:P></O:P></B><o:p></o:p></P></ST2:SN></ST1:PERSONNAME>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">Junior Scientist<o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">Pakistan Institute of Nuclear
> Sciences and Technology 
> (PINSTECH)<o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN: justify">P.O Box Nilore<o:p></o:p></P>
> <P class=MsoNormal style="MARGIN: 0in 0.5in 0pt;
> TEXT-ALIGN:
> justify"><ST1:CITY><ST1:PLACE>Islamabad</ST1:PLACE></ST1:CITY>
> .<o:p></o:p></P><SPAN style="FONT-FAMILY: 'Times New
> Roman'; FONT-SIZE: 12pt; mso-fareast-font-family:
> 'Times New Roman'; mso-ansi-language: EN-US;
> mso-fareast-language: EN-US; mso-bidi-language:
> AR-SA">Pakistan. </SPAN></DIV>
> 
> 
> 
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