[gradsusr] Confirmation of TCORR command

MD ABDUS SATTAR md-abdus.sattar at students.mq.edu.au
Tue Sep 22 01:57:23 EDT 2015


Dear Andrew
Thank you very much for your previous suggestion. Now, I can prepare El
Nino series as well as temporal correlation. However, I am not confident
enough whether I am right or wrong. I use the following script for
correlating El Nino 4 index with sea level pressure (Jan 1979 to Dec2014).
Please confirm me the following command.

"reinit"

"sdfopen \Temp\sst7914.mnmean.v4.nc"

"set t 1 12"

"define avesst=ave(sst1,t+0,t=432,12)"

"modify avesst seasonal"

"set t 1 432"

"define sstanom=sst1-avesst"



"define nino4=aave(sstanom,lon=-150,lon=160,lat=-5,lat=5)"



"sdfopen \Users\mq43879691\documents\test2\mslp.mon.mean.nc"

"set lon 0 360"

"set lat -90 90"

"set t 1"

"d tcorr(nino4,mslp.2,t=1,t=432)"


Output:

[image: Inline image 1]


How can perform lead or lag correlation?


Best regards

Abdus

On Tue, Sep 15, 2015 at 6:48 AM, Andrew Friedman <andfried at gmail.com> wrote:

> Hi Abdus,
>
> Your timeseries is static because your boundaries for ssta do not have a
> time-varying dimension.
>
> There are different commands, depending on what you’re trying to do.
>
> Are you trying to create a monthly ssta climatology? If so, check out the
> instructions for the command ‘modify’:
> http://www.iges.org/grads/gadoc/gradcomdmodify.html
>
> Or are you trying to create a running mean timeseries of ssta? In that
> case, try something like ssta=ave(sst,t-11,t+0).
>
> Best,
> Andrew
>
>
> On Sep 13, 2015, at 8:01 AM, MD ABDUS SATTAR <
> md-abdus.sattar at students.mq.edu.au> wrote:
>
> > Hi Andrew
> > I was trying to set tloop, but still facing difficulties. I prepared the
> script as:
> > "reinit"
> > "sdfopen \Users\mq43879691\documents\test2\sst.mnmean.v4.nc"
> > "set t 1 1937"
> > "define ssta=ave(sst,t=1501,t=1933,12)"
> >
> > "set lat 25"
> > "set lon 50"
> > "set lev 0"
> > "set t 1501 1933"
> >
> >
> > "d tloop(aave(ssta,lon=100,lon=170,lat=-5,lat=5))"
> >
> > "d tloop(aave(sst,lon=100,lon=170,lat=-5,lat=5))"
> >
> > I can display time series of El Nino by using sst value ("d
> tloop(aave(sst,lon=100,lon=170,lat=-5,lat=5))"). However, I would like use
> to ssta ("d tloop(aave(ssta,lon=100,lon=170,lat=-5,lat=5))") and when I use
> this the following map is found. Could you please suggest me in this
> regards?
> >
> >
> >
> > <image.png>
> >
> >
> > Thanking you
> >
> > Abdus
> >
> >
> >
> > On Fri, Sep 11, 2015 at 4:18 PM, Andrew Friedman <andfried at gmail.com>
> wrote:
> > Hi Abdus,
> > You may need to use ‘tloop’ with aave:
> http://www.iges.org/grads/gadoc/gradfunctloop.html
> > Andrew
> >
> > On Sep 11, 2015, at 7:05 AM, MD ABDUS SATTAR <
> md-abdus.sattar at students.mq.edu.au> wrote:
> >
> > > Dear GrADS Team
> > > I am trying to calculate time series of El Nino SST anomaly in January
> for a specific time period.
> > >
> > > I wrote my script as:
> > >
> > > "reinit"
> > > "sdfopen \Users\mq43879691\documents\test2\sst.mnmean.v4.nc"
> > > "set lon 100"
> > > "set lat 25"
> > > "set z 1"
> > > "set t 1 600"
> > >
> > > "define ssta=ave(sst,t=1,t=600,12)"
> > >
> > > "define elnino = aave(ssta,lon=100,lon=170,lat=-5,lat=5)"
> > >
> > > "d elnino"
> > >
> > > The GrADS did not know show anything by this script. On the other
> hand, when I display only ssta setting lon 50 100 and lat 0 25; then it
> shows the ssta. Can anybody help me in this regards?
> > >
> > > I look forward to your suggestion.
> > >
> > > Regards
> > > Abdus
> > > --
> > > Md. Abdus Sattar
> > > PhD Student
> > > Department of Environmental Sciences
> > > Level 2, Australian Hearing Hub Building
> > >
> > > Faculty of Science and Engineering
> > > Macquarie University
> > > NSW 2109 Australia
> > >
> > >
> > > Cell: +61404400401
> > > Email: md-abdus.sattar at students.mq.edu.au
> > >
> > > AND
> > >
> > > Assistant Professor
> > > Department of Disaster Risk Management (DRM)
> > > Faculty of Disaster Management
> > > Patuakhali Science and Technology University, Dumki, Patuakhali,
> Bangladesh
> > >
> > > Cell: +8801716851612
> > > Email: abdus.sattar at pstu.ac.bd
> > > _______________________________________________
> > > gradsusr mailing list
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> > > http://gradsusr.org/mailman/listinfo/gradsusr
> >
> >
> > _______________________________________________
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> > gradsusr at gradsusr.org
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> >
> >
> >
> > --
> > Md. Abdus Sattar
> > PhD Student
> > Department of Environmental Sciences
> > Level 2, Australian Hearing Hub Building
> >
> > Faculty of Science and Engineering
> > Macquarie University
> > NSW 2109 Australia
> >
> >
> > Cell: +61404400401
> > Email: md-abdus.sattar at students.mq.edu.au
> >
> > AND
> >
> > Assistant Professor
> > Department of Disaster Risk Management (DRM)
> > Faculty of Disaster Management
> > Patuakhali Science and Technology University, Dumki, Patuakhali,
> Bangladesh
> >
> > Cell: +8801716851612
> > Email: abdus.sattar at pstu.ac.bd
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> _______________________________________________
> gradsusr mailing list
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>



-- 
Md. Abdus Sattar
PhD Student
Department of Environmental Sciences
Level 2, Australian Hearing Hub Building

Faculty of Science and Engineering
Macquarie University
NSW 2109 Australia


Cell: +61404400401
Email: md-abdus.sattar at students.mq.edu.au

*AND*

Assistant Professor
Department of Disaster Risk Management (DRM)
Faculty of Disaster Management
Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh

Cell: +8801716851612
Email: abdus.sattar at pstu.ac.bd
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