Re: problem about function dpres_plevel

The function "dpres_plevel" requires 4 arguments. You specified 3. Try:

     dp = dpres_plevel(plev,psfc,ptop,0)

Good luck

On 11/08/2010 11:59 AM, Yan Bao wrote:
> Hi, Everyone
> I'd like to get the thickness of pressure levels with
> dpres_plevel function , and found if I did
> it from top atmosphere to surface , all the thicknesses I got are zero
> (See my testing script).
> Does any one know how I can make that? Is it right I only need to add a
> "-"sign in my integration term?
> Thanks for any of your suggestion.
>
> Yan
>
>
>
> ; PRESSURE (hPa)
> plev = (/ 1000.,950.,900.,850.,800.,750.,700.,650.,600., \
> 550.,500.,450.,400.,350.,300.,250.,200. /)
> plev = plev*100.
> plev@units ="Pa" ; Pa = kg/(m s2) (Pascal)
> ptop =*min* <http://www.ncl.ucar.edu/Document/Functions/Built-in/min.shtml>(plev)
> psfc = 1018*100.
> psfc@units ="Pa"
>
> dp = dpres_plevel(plev,psfc,ptop);
>
> rdp=dpres_plevel(plev,psfc,ptop); ==0
>
>
>
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Dennis J. Shea                  tel: 303-497-1361    |
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