[RegCNET] Fwd: Suggestion

[Islam Nazrul]

Hi Rajesh,

Your formula is correct. Whatever Mizan's suggestion is wrong because its
unit is mm/day. Once you averaged it (t=1,t=240), again unit mm/day and
multiply by 30 makes it monthly accumulation. The same suggested by Bamba is
correct. You may not expect exactly the same amount from simulation compared
to observations. You need to do some analysis for getting reasonable amount
from model data.

Nazrul

On Mon, Oct 25, 2010 at 10:54 AM, rajesh maurya <rksmaurya at gmail.com> wrote:

> Hello All,
>
>       I am plotting the contour for precipitation , in that it is showing 3
> hourly data( In SRF file ). Here I am plotting monthly precipitation the
> command i am using is
> *ga-> d ave(tpr,t=1,t=240)*30 (mm)* and found the value *542,
> 479,455,512,513 mm* ( year-  2000, 2001,2002, 2003, 2004) but observed
> data (IMD Delhi, India)  same time and same grid are found *799, 797, 658,
> 854, 815 mm* respectively.
>
> again using  Mr. Md. Mizanur Rahman suggestion using command *ga-> d
> ave(tpr,t=1,t=240)*8*30 (mm) *and found the values *4340, 3832, 3643,
> 4099, 4099, 4103* mm respectively.
>
>
> Please let me know If i am missing something.
>
> Thanks
> Rajesh Kumar Maurya
> M.Sc(Tech)- Geophysics(Meteorology); Junior Research Fellow & Research
> Scholar
> Department of Geophysics
> Banaras Hindu University
> Varanasi 221005
>
>
> ---------- Forwarded message ----------
> From: mizanur rahman <mrahman426 at yahoo.com>
> Date: Mon, Oct 25, 2010 at 11:11 AM
> Subject: Re: [RegCNET] Suggestion
> To: rajesh maurya <rksmaurya at gmail.com>
>
>
>   hi rajesh
> I think your formula is wrong. Because you are multiplying only by 30, it
> is not correct. It should be multiplied by 24*30, because you are doing
> average (t=1, t=240), after averging you will get one hour rainfall after
> that you will multiply 24 to average rainfall then you will get 24 hours
> rainfall. i, e complete formula for one month will be ave(t=1, t=240)*24*30
> then you will get one month rainfall (mm).
>
> regards
>
> Md. Mizanur Rahman
> Research Officer
> SAARC Meteorological Research Centre (SMRC)
> Plot No# E-4/C, Agargaon
> Sher-e-Bangla Nagar
> Dhaka-1207, BANGLADESH
> Cell Phone: +88-01726652541
> Phone: +88-02-9144374 (office)
> Fax: +88-02-9144373
>
>
>  ------------------------------
> *From:* rajesh maurya <rksmaurya at gmail.com>
> *To:* regcnet <regcnet at lists.ictp.it>
> *Sent:* Fri, October 22, 2010 4:51:04 PM
> *Subject:* [RegCNET] Suggestion
>
> Hello All,
>
>       I am plotting the contour for precipitation , in that it is showing 3
> hourly data( In SRF file ). Here I am plotting monthly precipitation the
> command i am using is  *ga-> d ave(tpr,t=1,t=240)*30 (mm)* My question is
> about the command whether it is right one to get correct value or else .
>
> Please let me know If i am missing something.
>
>
> _______________________________________________
> RegCNET mailing list
> RegCNET at lists.ictp.it
> https://lists.ictp.it/mailman/listinfo/regcnet
>



-- 
Dr. Md Nazrul Islam
Professor
Department of Meteorology
Faculty of Meteorology, Environment & arid Land Agriculture
King Abdulaziz University
Jeddah, Saudi Arabia

E-mail:mnislam at kau.edu.sa <E-mail%3Amnislam at kau.edu.sa>
nazrul_buet at yahoo.com
Phone:+6400000, +6952000 Ext. 64855
http://www.buet.ac.bd/phy/nazrul.htm
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ictp.it/pipermail/regcnet/attachments/20101025/18a4cdfb/attachment.html>