[gradsusr] Vint fucntion - problem

[°° Maytê °° .]

Hi,

I'm trying to calculate the transport and convergence of moisture flux integrated in three layers of the troposphere. Define the layers as follows: 

 * Lower troposphere:
'set lev 1000'
 'defines fqu1 vint = (lev, q*u, 850)'           

 * Middle troposphere:
 'set lev 700'
 'defines fqu2 vint = (lev, u*q, 500)'

 * High Troposphere:
 'set lev 500'
 'defines fqu3 vint = (lev, u*q, 300)'

The same for fqv1, fqv2 and fqv3...

For then, the values ​​at low levels are lower than in the middle and upper troposphere.
 Is there another way to calculate? 

 Something is wrong, since I reviewed all the steps and the only change I make is the 'lev'.
 Before had done the integration from 1000 to 300 hPa and not had any problem.

 thank you,
 May
 		 	   		   		 	   		   		 	   		  
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