As noted in the documentation at the top of:
http://www.ncl.ucar.edu/Applications/mjoclivar.shtml
The "MJO Clivar" page follows the diagnostics peoposed
in the reference below.
"The US-CLIVAR MJO working group has developed diagnostics for
objectively evaluating the MJO. The official US-CLIVAR MJO diagnostics
website provides data, C-shell scripts, fortran code and GrADS scripts
which implement and display all the suggested diagnostics. The NCL
examples presented below perform many of the suggested diagnostics."
Reference
MJO Simulation Diagnostics
Waliser et al.
2009, J. Clim., 22: 3006-3030
DOI: 10.1175/2008JCLI2731.1
On 4/5/10 8:01 PM, Xie Xin wrote:
> hi,
>
> I am using the MJO scripts in NCL to see some MJO results. When I come
> to the multivariate EOF for MJO, it seems a little different from the
> Wheeler 2004 and Lo 1999 paper. In the paper it suggests that
> "seasonal cycle should be removed by subtracting from each grid point
> the time mean and first three harmonics of the annual cycle" and then
> the inter-annual variability associated with ENSO should also be
> removed by first subtraction of variability that is linearly related
> to a measure of ENSO in SST and trends, a 120-day mean of previous 120
> days is subtracted. However, in the script of NCL I can only see the
> band pass filter of the anomlies is applied. I do not know whether
> this conforms to to the method of the original papers. And I need your
> help about this. Is the script in NCL OK for MJO diagnostics? Thank
> you very much!
>
> Best regards,
>
> Xin Xie
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Received on Mon Apr 5 20:12:27 2010
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