# [ncl-talk] plotting itcz

Dennis Shea shea at ucar.edu
Fri Aug 9 15:22:16 MDT 2019

Based on the figures in the Berry & Reeder reference., NCL was used to make
the plots [? computations ?].

If you are focused on the ITCZ of the South Asian Monsoon Sector and the
data are on a rectilinear grid*, *you could use NCL's coordinate
subscripting

latS   = -10     ; arbitrary
latN   =   40
lonL =   40
lonR  = 130

x3d = f->X(:,*{latS:latN},{lonL:lonR}*)   ; region only
printVarSummary(x3d)

z4d = f->Z(:,:, *{latS:latN},{lonL:lonR}*)
printVarSummary(z4d)

*---*
when plotting a map

res at gsnAddCyclic  = False    ; region
res at mpMinLatF      = latS
res at mpMaxLatF     = latN
res at mpMinLonF     = lonL
res at mpMaxLonF    = lonR

---
See:
*http://www.ncl.ucar.edu/Applications/cylineq.shtml*
<http://www.ncl.ucar.edu/Applications/cylineq.shtml>
Example 3
---
*https://en.wikipedia.org/wiki/Monsoon_of_South_Asia*
<https://en.wikipedia.org/wiki/Monsoon_of_South_Asia>

On Fri, Aug 9, 2019 at 11:02 AM Debashis Paul <debgeo668 at gmail.com> wrote:

> Thanks a lot. .. Sorry for posting such a query... Actually I tried a lot
> for visualising itcz but did not get the proper plot in which I wanted to
> show... So i posted it... Will be careful next time while posting any
> query...
>
> With regards
> Debashis Paul
>
> On Fri, 9 Aug, 2019, 7:16 PM Dennis Shea, <shea at ucar.edu> wrote:
>
>> The following may give you some ideas.
>>
>> Berry and Reeder (2014)
>>
>> *Objective Identification of the Intertropical Convergence Zone:
>> Climatology and Trends from the ERA-Interim *
>> <https://journals.ametsoc.org/doi/full/10.1175/JCLI-D-13-00339.1>
>>
>> ncl-talk is a 'language-fourum' not a 'science-forum'. If you have
>>
>> On Thu, Aug 8, 2019 at 10:33 PM Debashis Paul via ncl-talk <
>> ncl-talk at ucar.edu> wrote:
>>
>>> Hello everyone,
>>> I am trying to show the shift in ITCZ of the South Asian Monsoon Sector,
>>> so if anyone has any idea of how to show it, it is much appreciated.
>>>
>>> With regards,
>>>
>>> *******************************************************************************
>>> *Debashis Paul*
>>>
>>> *Research Scholar,NIT-RKL*
>>> *Ph:+917094956448*
>>> *E-mail: Debgeo668 at gmail.com <Debgeo668 at gmail.com>*
>>> _______________________________________________
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>>
>>
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