Taylor Diagram

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 08:37:45 2011