[ncl-talk] U-wind anomalies in mjoclivar_9

[Dennis Shea]

The data source was NCEP_NCAR Reanalysis.

It looks like "raw anomalies"

  uName  = "U_anom"        ; name of variable on U-anomaly file
  diru   = "~/Data/AMWG/"
  filu   = "uwnd.day.850.anomalies.1980-2005.nc"
===
The netCDF files has a smoothed version of the variable named:  U_anom_sm

netcdf uwnd.day.850.anomalies.1980-2005 {
dimensions:
        time = UNLIMITED ; // (9497 currently)
        lat = 73 ;
        lon = 144 ;
variables:
        double time(time) ;
                time:units = "hours since 1-1-1 00:00:0.0" ;
                time:long_name = "Time" ;
                time:actual_range = 17259936., 17268672. ;
                time:delta_t = "0000-00-01 00:00:00" ;
                time:avg_period = "0000-00-01 00:00:00" ;
        float lat(lat) ;
                lat:units = "degrees_north" ;
                lat:actual_range = 90.f, -90.f ;
                lat:long_name = "Latitude" ;
        float lon(lon) ;
                lon:units = "degrees_east" ;
                lon:long_name = "Longitude" ;
                lon:actual_range = 0.f, 357.5f ;
        float U_anom(time, lat, lon) ;
                U_anom:_FillValue = 32766.f ;
                U_anom:long_name = "Anomalies: mean Daily U-wind" ;
                U_anom:units = "m/s" ;
        float U_anom_sm(time, lat, lon) ;
                U_anom_sm:_FillValue = 32766.f ;
                U_anom_sm:long_name = "Anomalies from Smooth Daily
Climatology" ;
                U_anom_sm:units = "m/s" ;

// global attributes:
                :creation_date = "Thu Oct  9 12:42:00 MDT 2008" ;


On Thu, Mar 23, 2017 at 5:29 AM, Sujata Mandke <amin at tropmet.res.in> wrote:

>
> Dear NCL community,
> Greetings!
>    I have searched ncl-talk archives before posting this question to the
> list,
> but did not find answer.  It is simple question.
>    Daily anomalies of U-wind at 850hPa are used as input data in the
> example script mjoclivar_9.ncl on NCL website. Are these anomalies
> calculated using raw daily climatology or smooth daily climatology?.
> I had used this ncl script for some model data.
>
>   In the plots obtained from mjoclivar_9.ncl script using model data,
> U-wind is not showing correct propagation while precipitation is showing
> northward propagation. I had used daily U-wind anomalies calculated from
> raw daily climatology. I am attaching plot for GFDL-HIRAM-C-180 model
> precipitation and U-wind at 850hPa for summer season with this mail.
>
> I am using NCL version 6.1.2 on linux machine.
> Please help in this regard.
> Any suggestion would be of great help.
>  Thanks.
> With best regards
> Dr. Sujata Mandke
> --
> Dr. Sujata Mandke
> scientist,Indian Institute of Tropical Meteorology
> PUNE,INDIA
>
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