回复： Re: about vint

[Kwan-yin Kong]

In this case, you should use pressure at the surface
instead of sea-level pressure.

On Tue, 17 Oct 2006 08:48:33 +0800
  dongdong <happydong365 at YAHOO.COM.CN> wrote:
>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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