[RegCNET] RegCM and map projections

[Pir S. Ali]

Dear OMAR,

I have checked the value of xmap with ROTMER. It is one (1). Thank you for
your suggestion.

with regards,
Ali

On Wed, Sep 5, 2012 at 2:53 PM, Mohamad Ibrahim OMAR
<egy_mohamad at yahoo.com>wrote:

> Hi,
> If your domain has two parts on in tropics and the other in Middle
> latitudes, I think the prefable projection is ROTMER and you can check this
> by plot your domain after the terrain step and see the values of xmap. the
> xmap should be one "1" not far this number (i.e. 1.01, 0.99, etc..).
> I hope this will help
> thanks
>
> Mohamed Ibrahim El-Sayed OMAR
> Egyptian Meteorological Authority
> Scientific Research Department
> Climate Studies Centre
> Kobry El-Quobba, P.O.Box. 11784
> Cairo, EGYPT
> Mobil phone  : 002 01060802805
> Home Phone : 002 0482370261
>
>    *From:* Pir S. Ali <pirshauki at gmail.com>
> *To:* regcnet at lists.ictp.it; Suman Maity <suman.buie at gmail.com>
> *Sent:* Wednesday, September 5, 2012 10:59 AM
> *Subject:* Re: [RegCNET] RegCM and map projections
>
> Dear Suman & RegCNET,
>
> Thank you for your reply and suggesting me Lambert Conformal but Lambert
> Conformal projection covers around 45 degrees and my domain is Crossing
>  45 degrees extent in latitude.
>
> I request RegCNET please comments. Is the map projection also effect the
> sensitivity of the model or it is only for display purposes?
>
> With regards,
> Ali
>
> On Wed, Sep 5, 2012 at 1:46 AM, Suman Maity <suman.buie at gmail.com> wrote:
>
> Dear
> Ali
> This is Suman Maity from Indian Institute of Technology Kharagpur, India.I
> have got your problem. I don't know about the comparative study but as a
> suggestion as in my case (domain having low and middle latitude) you can
> use Lambert Confomal. I have done language study and taken this decision.
>
> With Regards
> 'S Maity'
> ********************************************************
> Suman Maity*
> Research Scholar
> Center for Ocean, Rivers, Atmosphere and Land Sciences(CORAL)
> Indian Institute Of Technology Kharagpur.
> *
> ******************************************************* *
> *  *
>
>
>
> On Wed, Sep 5, 2012 at 12:04 PM, Pir S. Ali <pirshauki at gmail.com> wrote:
>
> Dear All,
>
> I am running RegCM 4.3.3 for the attached model domain with map projection
> of Rotated Mercator . I read the follow statements in RegCM user guide:
>
> • Middle latitudes (around 45 degrees) - Lambert Conformal
> • Polar latitudes (more than 75 degrees) - Polar Stereographic
> • Low latitudes (up to 30 degrees and crossing the equator) - Mercator
> • Crossing more than 45 degrees extent in latitude - Rotated Mercator
>
> My domain consist of both Low latitudes and Middle latitudes. Please help
> me in the following two queries:
>
> 1)      Which map projection is the best choice for the attached domain.
> Lambert Conformal or Rotated Mercator?
> 2)      Is there any comparative study or research paper on the effect of
> map projections for a particular domain using RegCM?
>
>
> With regards,
> Ali
>
>
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-- 
Shaukat Ali

PhD Scholar
Institute of Atmospheric Physics, Chinese Academy of Sciences
40#Hua Yan Li, Qi Jia Huo Zi, Chao Yang District
Beijing 100029, China
Tel: +86-10-82995138
Mobile: 008613436344529

--------------------------------------------------------------

Scientific Officer (Climate Section)
Global Change Impact Studies Centre (GCISC)
National Centre for Physics (NCP) Complex
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http://www.gcisc.org.pk
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