回复： Re: about vint

[dongdong]

Thank you very much for your reply!
The levels I used are from surface to 300mb, and the
integrated areas contain tibet where the mean height
is 4000m. I wonder whether it is reasonable by using
sea surface pressure?

--- Kwan-yin Kong <kongkwan at SCI.CCNY.CUNY.EDU>写道:

> Dong dong:
>
> I think the correct syntax is vint(expr,psexpr,top).
>
> I think sea-surface pressure is almost the same as
> surface
> pressure, unless you only what to integrate the
> variable
> in a very small depth.  How deep into the atmosphere
> do
> you want to integrate?
>
> Kwan-yin Kong
>
> On Mon, 16 Oct 2006 20:33:42 +0800
>   dongdong <happydong365 at YAHOO.COM.CN> wrote:
> >hello everybody:
> >    i have some troubles with function 'vint'. Can
> you
> >help me? Thank you in advance!
> >   1. which is the right function express,
> >vint(expr,psexpr,top) or vint(psexpr,expr,top) ? In
> >the web,it says vint(psexpr,expr,top) but in the
> GrADS
> >document(v1.5.1.12),it is vint(expr,psexpr,top)
> >   2. psexpr is surface pressure or sea surface
> >pressure?
> >   if it's surface pressure, do i have to change
> sea
> >surface pressure to surface pressure (based on
> surface
> >height)? is there another way ? (because i only
> have
> >sea surface level pressure at hand,and don't have
> >surface height datasets)
> >
> >   Thank you very much,and Best Regards!!!
> >
> >
> >
> >
> >
> >
> >
>
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