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<DIV><FONT size=2 face=Arial>Try this:</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>'set z 1 last'</FONT></DIV>
<DIV><FONT size=2 face=Arial>*where "last" is the total number of
levels</FONT></DIV>
<DIV><FONT size=2 face=Arial>'fq1=vint(ps,q*u,850)'</FONT></DIV>
<DIV><FONT size=2 face=Arial>*where ps is your surface pressure
field</FONT></DIV>
<DIV><FONT size=2 face=Arial>
<DIV><FONT size=2 face=Arial>'fq2=vint(ps,q*u,500)-fq1'
<DIV><FONT size=2 face=Arial>
<DIV><FONT size=2 face=Arial>'fq3=vint(ps,q*u,300)-fq2'</FONT></DIV>
<DIV> </DIV>
<DIV>Bye</DIV></FONT></DIV></FONT></DIV></FONT></DIV>
<DIV><BR>Antonino Claudio Bonan</DIV>
<DIV>ARPAV- Servizio Meteorologico</DIV>
<DIV>Teolo (PD) - Italy</DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=jeffduda319@gmail.com href="mailto:jeffduda319@gmail.com">Jeff
Duda</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=gradsusr@gradsusr.org
href="mailto:gradsusr@gradsusr.org">GrADS Users Forum</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, January 23, 2014 8:26
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [gradsusr] Vint fucntion -
problem</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>Check example #2 in the documentation for the vint function:
<DIV><BR></DIV>
<DIV>
<P
style="FONT-FAMILY: 'Times New Roman'; COLOR: rgb(0,0,0); FONT-SIZE: medium">2.
This is an artificial example that demonstrates a vertical integration from a
fixed lower bound of 1000mb to the top of the atmosphere, and integrating a
field of all 1's. This gives an answer of 10204.1 (or 100000/9.8) which is the
mass of air (in kg) of a 1 meter squared column when the surface pressure is 1
bar and the accelleration due to gravity is assumed to be exactly 9.8m/sec**2
over the entire column.</P>
<UL
style="FONT-FAMILY: 'Times New Roman'; COLOR: rgb(0,0,0); FONT-SIZE: medium"><CODE>vint(const(ps,1000),const(t,1),0)</CODE><CODE>
<DIV><BR></DIV></CODE></UL><FONT color=#000000
face="arial, helvetica, sans-serif">Grads is probably having a hard time
figuring out what you mean by 'lev' in the first argument. My guess is
the same numerical values of lev are being used in each of the three commands.
The value is probably 1000, so in effect you are integrating over
progressively deeper layers, which is why you are getting fqu1 < fqu2 <
fqu3 for example. I would try changing the first argument to something
like const(p,1000), const(p,700), const(p,500) etc.</FONT></DIV>
<DIV><FONT color=#000000 face="arial, helvetica, sans-serif"><BR></FONT></DIV>
<DIV><FONT color=#000000 face="arial, helvetica, sans-serif">Jeff
Duda<BR></FONT>
<UL
style="FONT-FAMILY: 'Times New Roman'; COLOR: rgb(0,0,0); FONT-SIZE: medium"><CODE><BR></CODE></UL></DIV></DIV>
<DIV class=gmail_extra><BR><BR>
<DIV class=gmail_quote>On Thu, Jan 23, 2014 at 1:17 PM, °° Maytę °° . <SPAN
dir=ltr><<A href="mailto:mayteleal@hotmail.com"
target=_blank>mayteleal@hotmail.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>
<DIV>
<DIV dir=ltr>
<DIV>
<DIV dir=ltr><BR>
<DIV>
<DIV dir=ltr>Hi,<BR><BR><SPAN lang=en>
<DIV class=im><SPAN><SPAN lang=en><SPAN>I'm trying to</SPAN> <SPAN>calculate
the</SPAN> <SPAN>transport</SPAN> <SPAN>and convergence</SPAN>
<SPAN>of</SPAN> <SPAN>moisture</SPAN> <SPAN>flux</SPAN>
<SPAN>integrated</SPAN> <SPAN>in three</SPAN> <SPAN>layers</SPAN> <SPAN>of
the troposphere</SPAN><SPAN>. </SPAN><SPAN>Define</SPAN> <SPAN>the
layers</SPAN> <SPAN>as follows:</SPAN>
</SPAN></SPAN><SPAN></SPAN><BR><BR><SPAN>* Lower
troposphere</SPAN></DIV><SPAN>:<BR>'set lev
1000'<BR></SPAN><SPAN>'defines</SPAN> <SPAN>fqu1</SPAN> <SPAN>vint</SPAN>
<SPAN>=</SPAN> <SPAN>(lev,
q</SPAN><SPAN>*u</SPAN><SPAN></SPAN><SPAN>,</SPAN>
<SPAN>850)</SPAN><SPAN>'</SPAN><SPAN>
</SPAN><SPAN></SPAN><BR>
<DIV class=im><BR><SPAN>* Middle
troposphere</SPAN><SPAN>:</SPAN><BR><SPAN>'set</SPAN> <SPAN>lev</SPAN>
<SPAN>700</SPAN><SPAN>'</SPAN><BR><SPAN>'</SPAN><SPAN>defines</SPAN>
<SPAN>fqu2</SPAN> <SPAN>vint</SPAN> <SPAN>=</SPAN>
<SPAN>(</SPAN><SPAN>lev,</SPAN>
<SPAN>u*</SPAN><SPAN>q</SPAN><SPAN></SPAN><SPAN>,</SPAN>
<SPAN>500</SPAN><SPAN>)</SPAN><SPAN>'</SPAN><BR><BR><SPAN>* High</SPAN>
<SPAN>Troposphere</SPAN><SPAN>:</SPAN><BR><SPAN>'set</SPAN> <SPAN>lev</SPAN>
<SPAN>500</SPAN><SPAN>'</SPAN><BR><SPAN>'</SPAN><SPAN>defines</SPAN>
<SPAN>fqu3</SPAN> <SPAN>vint</SPAN> <SPAN>=</SPAN>
<SPAN>(</SPAN><SPAN>lev,</SPAN>
<SPAN>u</SPAN>*<SPAN>q</SPAN><SPAN></SPAN><SPAN>,</SPAN>
<SPAN>300</SPAN><SPAN>)</SPAN><SPAN>'</SPAN><BR></DIV></SPAN>
<DIV class=im><BR><SPAN lang=en><SPAN lang=en><SPAN>The same for</SPAN>
<SPAN>fqv1, fqv2 and fqv3...<BR><BR></SPAN></SPAN><SPAN>For
then</SPAN><SPAN>, the values at</SPAN> <SPAN>low levels</SPAN>
<SPAN>are</SPAN> <SPAN>lower than</SPAN> <SPAN>in the</SPAN> <SPAN>middle
and upper</SPAN> <SPAN>troposphere.</SPAN><BR><SPAN></SPAN></SPAN><SPAN
lang=en><SPAN><SPAN lang=en><SPAN>Is there another</SPAN> <SPAN>way to
calculate</SPAN><SPAN>?</SPAN>
</SPAN></SPAN><SPAN></SPAN><BR><BR><SPAN>Something is</SPAN> <SPAN>wrong,
since</SPAN> <SPAN>I reviewed</SPAN> <SPAN>all the steps</SPAN> <SPAN>and
the only</SPAN> <SPAN>change</SPAN> <SPAN>I make</SPAN> <SPAN>is</SPAN>
<SPAN>the</SPAN>
<SPAN>'</SPAN><SPAN>lev</SPAN><SPAN>'</SPAN><SPAN>.</SPAN><BR><SPAN>Before</SPAN>
<SPAN>had done</SPAN> <SPAN>the integration</SPAN> <SPAN>from 1000 to</SPAN>
<SPAN>300 hPa</SPAN> <SPAN>and not</SPAN> <SPAN>had any
problem</SPAN><SPAN>.</SPAN><BR><BR><SPAN>thank
you</SPAN><SPAN>,</SPAN><BR><SPAN>May</SPAN></SPAN><BR></DIV></DIV></DIV></DIV></DIV></DIV></DIV><BR>_______________________________________________<BR>gradsusr
mailing list<BR><A
href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</A><BR><A
href="http://gradsusr.org/mailman/listinfo/gradsusr"
target=_blank>http://gradsusr.org/mailman/listinfo/gradsusr</A><BR><BR></BLOCKQUOTE></DIV><BR><BR
clear=all>
<DIV><BR></DIV>-- <BR>Jeff Duda<BR>Graduate research assistant<BR>University
of Oklahoma School of Meteorology<BR>Center for Analysis and Prediction of
Storms<BR></DIV>
<P>
<HR>
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