Re: Taylor Diagram

From: I N <qphoton_at_nyahnyahspammersnyahnyah>
Date: Tue Nov 15 2011 - 09:31:01 MST

Dear Dennis,

  Thanks for the quick reply. My first question was not actually
about reference grid rather it was about temporal resolution of the
It is recommended to use monthly/seasonal data or one can also use
daily data for taylor diagram?


On Tue, Nov 15, 2011 at 5:01 PM, Dennis Shea <> wrote:
> [1] You can use any reference grid. As to what is appropriate for
>    one year of daily data, I don't know. You have to make that
>    decision.
> [2] for only an 8 degree latitude span, the results will be
>    more or less the same. Again, you shuld make that choice.
> Good luck
> On 11/15/11 8:37 AM, I N wrote:
>> Dear All,
>> I have a one year daily precipitation data from different setups of
>> the same RCMl and observed precipication, all on the same curvilinear
>> grid (Lambert conformal projection).
>> The task is to create taylor diagram for whole year, Winter, Summer
>> and 4 seasons (DJF,MAM,....).
>> The latitude span of domain is from 42N to 50N (8 degree)
>> I have few questions:
>> 1) From NCL website, second line on the page "Special Topics: Taylor
>> Diagrams"
>>  "The plotted values are generally derived from monthly or seasonal
>> climatological means of one or more variables"
>> This means that it is recommended to use monthly/seasonal climatology.
>> Does it apply to all cases or in my case (only 1 year of data)
>> I can use daily data. What is advantage/disadvantage of using daily data?
>> 2) From ncl-talk archive of May 21, 2010.
>>>> If the region being tested is 'large' then a weight variable [wgt]
>>>> should be created. If your region is 'small', you can ignore the
>>>> weight [wgt=1]. Given that you are looking at a very small area, you
>>>> can ignore any weighting. Also you have masked out all points outside
>>>> your area of interest.
>> Small and large are relative terms!! If the latitude span is 8 degree,
>> it is considered small or not?
>> I find significant differences between wgt=1 and
>> wgt=cos(lat2d*0.01745329) versions of taylor diagram.
>> Thanks in advance
>> Regards
>> Nadeem
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Received on Tue Nov 15 09:31:16 2011

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